{"pageNumber":"185","pageRowStart":"4600","pageSize":"25","recordCount":10951,"records":[{"id":70032419,"text":"70032419 - 2011 - Simulating the potential effects of climate change in two Colorado basins and at two Colorado ski areas","interactions":[],"lastModifiedDate":"2020-01-28T15:31:02","indexId":"70032419","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1421,"text":"Earth Interactions","active":true,"publicationSubtype":{"id":10}},"title":"Simulating the potential effects of climate change in two Colorado basins and at two Colorado ski areas","docAbstract":"<p>The mountainous areas of Colorado are used for tourism and recreation, and they provide water storage and supply for municipalities, industries, and agriculture. Recent studies suggest that water supply and tourist industries such as skiing are at risk from climate change. In this study, a distributed-parameter watershed model, the Precipitation-Runoff Modeling System (PRMS), is used to identify the potential effects of future climate on hydrologic conditions for two Colorado basins, the East River at Almont and the Yampa River at Steamboat Springs, and at the subbasin scale for two ski areas within those basins.</p><p>Climate-change input files for PRMS were generated by modifying daily PRMS precipitation and temperature inputs with mean monthly climate-change fields of precipitation and temperature derived from five general circulation model (GCM) simulations using one current and three future carbon emission scenarios. All GCM simulations of mean daily minimum and maximum air temperature for the East and Yampa River basins indicate a relatively steady increase of up to several degrees Celsius from baseline conditions by 2094. GCM simulations of precipitation in the two basins indicate little change or trend in precipitation, but there is a large range associated with these projections. PRMS projections of basin mean daily streamflow vary by scenario but indicate a central tendency toward slight decreases, with a large range associated with these projections.</p><p>Decreases in water content or changes in the spatial extent of snowpack in the East and Yampa River basins are important because of potential adverse effects on water supply and recreational activities. PRMS projections of each future scenario indicate a central tendency for decreases in basin mean snow-covered area and snowpack water equivalent, with the range in the projected decreases increasing with time. However, when examined on a monthly basis, the projected decreases are most dramatic during fall and spring. Presumably, ski area locations are picked because of a tendency to receive snow and keep snowpack relative to the surrounding area. This effect of ski area location within the basin was examined by comparing projections of March snow-covered area and snowpack water equivalent for the entire basin with more local projections for the portion of the basin that represents the ski area in the PRMS models. These projections indicate a steady decrease in March snow-covered area for the basins but only small changes in March snow-covered area at both ski areas for the three future scenarios until around 2050. After 2050, larger decreases are possible, but there is a large range in the projections of future scenarios. The rates of decrease for snowpack water equivalent and precipitation that falls as snow are similar at the basin and subbasin scale in both basins. Results from this modeling effort show that there is a wide range of possible outcomes for future snowpack conditions in Colorado. The results also highlight the differences between projections for entire basins and projections for local areas or subbasins within those basins.</p>","language":"English","publisher":"American Meteorological Society","doi":"10.1175/2011EI373.1","usgsCitation":"Battaglin, W., Hay, L.E., and Markstrom, S., 2011, Simulating the potential effects of climate change in two Colorado basins and at two Colorado ski areas: Earth Interactions, v. 15, no. 22, p. 1-23, https://doi.org/10.1175/2011EI373.1.","productDescription":"23 p.","startPage":"1","endPage":"23","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":475226,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1175/2011ei373.1","text":"Publisher Index Page"},{"id":241440,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"East River, Yampa 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 \"}}]}","volume":"15","issue":"22","noUsgsAuthors":false,"publicationDate":"2011-06-01","publicationStatus":"PW","scienceBaseUri":"505b8fdbe4b08c986b3191a3","contributors":{"authors":[{"text":"Battaglin, William","contributorId":112783,"corporation":false,"usgs":true,"family":"Battaglin","given":"William","affiliations":[],"preferred":false,"id":513953,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hay, Lauren E. 0000-0003-3763-4595 lhay@usgs.gov","orcid":"https://orcid.org/0000-0003-3763-4595","contributorId":1287,"corporation":false,"usgs":true,"family":"Hay","given":"Lauren","email":"lhay@usgs.gov","middleInitial":"E.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":513952,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Markstrom, Steve","contributorId":23682,"corporation":false,"usgs":true,"family":"Markstrom","given":"Steve","affiliations":[],"preferred":false,"id":513951,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70032292,"text":"70032292 - 2011 - Setting limits: Using air pollution thresholds to protect and restore U.S. ecosystems","interactions":[],"lastModifiedDate":"2012-03-12T17:21:25","indexId":"70032292","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2121,"text":"Issues in Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Setting limits: Using air pollution thresholds to protect and restore U.S. ecosystems","docAbstract":"More than four decades of research provide unequivocal evidence that sulfur, nitrogen, and mercury pollution have altered, and will continue to alter, our nation's lands and waters. The emission and deposition of air pollutants harm native plants and animals, degrade water quality, affect forest productivity, and are damaging to human health. Many air quality policies limit emissions at the source but these control measures do not always consider ecosystem impacts. Air pollution thresholds at which ecological effects are observed, such as critical loads, are effective tools for assessing the impacts of air pollution on essential ecosystem services and for informing public policy. U.S. ecosystems can be more effectively protected and restored by using a combination of emissions-based approaches and science-based thresholds of ecosystem damage. Based on the results of a comprehensive review of air pollution thresholds, we conclude: ??? Ecosystem services such as air and water purification, decomposition and detoxification of waste materials, climate regulation, regeneration of soil fertility, production and biodiversity maintenance, as well as crop, timber and fish supplies are impacted by deposition of nitrogen, sulfur, mercury and other pollutants. The consequences of these changes may be difficult or impossible to reverse as impacts cascade throughout affected ecosystems. ??? The effects of too much nitrogen are common across the U.S. and include altered plant and lichen communities, enhanced growth of invasive species, eutrophication and acidification of lands and waters, and habitat deterioration for native species, including endangered species. ??? Lake, stream and soil acidification is widespread across the eastern United States. Up to 65% of lakes within sensitive areas receive acid deposition that exceeds critical loads. ??? Mercury contamination adversely affects fish in many inland and coastal waters. Fish consumption advisories for mercury exist in all 50 states and on many tribal lands. High concentrations of mercury in wildlife are also widespread and have multiple adverse effects. ??? Air quality programs, such as those stemming from the 1990 Clean Air Act Amendments, have helped decrease air pollution even as population and energy demand have increased. Yet, they do not adequately protect ecosystems from long-term damage. Moreover they do not address ammonia emissions. ??? A stronger ecosystem basis for air pollutant policies could be established through adoption of science-based thresholds. Existing monitoring programs track vital information needed to measure the response to policies, and could be expanded to include appropriate chemical and biological indicators for terrestrial and aquatic ecosystems and establishment of a national ecosystem monitoring network for mercury. The development and use of air pollution thresholds for ecosystem protection and management is increasing in the United States, yet threshold approaches remain underutilized. Ecological thresholds for air pollution, such as critical loads for nitrogen and sulfur deposition, are not currently included in the formal regulatory process for emissions controls in the United States, although they are now considered in local management decisions by the National Park Service and U.S. Forest Service. Ecological thresholds offer a scientifically sound approach to protecting and restoring U.S. ecosystems and an important tool for natural resource management and policy. ?? The Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Issues in Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"10928987","usgsCitation":"Fenn, M., Lambert, K., Blett, T., Burns, D.A., Pardo, L., Lovett, G., Haeuber, R.A., Evers, D., Driscoll, C.T., and Jeffries, D., 2011, Setting limits: Using air pollution thresholds to protect and restore U.S. ecosystems: Issues in Ecology, no. 14.","costCenters":[],"links":[{"id":242615,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"14","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d71e4b08c986b3183ed","contributors":{"authors":[{"text":"Fenn, M.E.","contributorId":68686,"corporation":false,"usgs":true,"family":"Fenn","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":435473,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lambert, K.F.","contributorId":64048,"corporation":false,"usgs":true,"family":"Lambert","given":"K.F.","email":"","affiliations":[],"preferred":false,"id":435472,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Blett, T.F.","contributorId":10241,"corporation":false,"usgs":true,"family":"Blett","given":"T.F.","email":"","affiliations":[],"preferred":false,"id":435466,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Burns, Douglas A. 0000-0001-6516-2869","orcid":"https://orcid.org/0000-0001-6516-2869","contributorId":29450,"corporation":false,"usgs":true,"family":"Burns","given":"Douglas","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":435468,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Pardo, L.H.","contributorId":93209,"corporation":false,"usgs":true,"family":"Pardo","given":"L.H.","email":"","affiliations":[],"preferred":false,"id":435475,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lovett, Gary M.","contributorId":85990,"corporation":false,"usgs":true,"family":"Lovett","given":"Gary M.","affiliations":[],"preferred":false,"id":435474,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Haeuber, R. A.","contributorId":56057,"corporation":false,"usgs":true,"family":"Haeuber","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":435471,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Evers, D.C.","contributorId":36501,"corporation":false,"usgs":true,"family":"Evers","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":435469,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Driscoll, C. T.","contributorId":47530,"corporation":false,"usgs":false,"family":"Driscoll","given":"C.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":435470,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Jeffries, D.S.","contributorId":19729,"corporation":false,"usgs":true,"family":"Jeffries","given":"D.S.","email":"","affiliations":[],"preferred":false,"id":435467,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70034589,"text":"70034589 - 2011 - MercNet: A national monitoring network to assess responses to changing mercury emissions in the United States","interactions":[],"lastModifiedDate":"2020-01-11T11:07:19","indexId":"70034589","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1479,"text":"Ecotoxicology","active":true,"publicationSubtype":{"id":10}},"title":"MercNet: A national monitoring network to assess responses to changing mercury emissions in the United States","docAbstract":"<p>A partnership of federal and state agencies, tribes, industry, and scientists from academic research and environmental organizations is establishing a national, policy-relevant mercury monitoring network, called MercNet, to address key questions concerning changes in anthropogenic mercury emissions and deposition, associated linkages to ecosystem effects, and recovery from mercury contamination. This network would quantify mercury in the atmosphere, land, water, and biota in terrestrial, freshwater, and coastal ecosystems to provide a national scientific capability for evaluating the benefits and effectiveness of emission controls. Program development began with two workshops, convened to establish network goals, to select key indicators for monitoring, to propose a geographic network of monitoring sites, and to design a monitoring plan. MercNet relies strongly on multi-institutional partnerships to secure the capabilities and comprehensive data that are needed to develop, calibrate, and refine predictive mercury models and to guide effective management. Ongoing collaborative efforts include the: (1) development of regional multi-media databases on mercury in the Laurentian Great Lakes, northeastern United States, and eastern Canada; (2) syntheses and reporting of these data for the scientific and policy communities; and (3) evaluation of potential monitoring sites. The MercNet approach could be applied to the development of other monitoring programs, such as emerging efforts to monitor and assess global mercury emission controls.&nbsp;</p>","language":"English","publisher":"Elsevier","doi":"10.1007/s10646-011-0756-4","issn":"09639292","usgsCitation":"Schmeltz, D., Evers, D., Driscoll, C.T., Artz, R., Cohen, M., Gay, D., Haeuber, R., Krabbenhoft, D., Mason, R., Morris, K., and Wiener, J., 2011, MercNet: A national monitoring network to assess responses to changing mercury emissions in the United States: Ecotoxicology, v. 20, no. 7, p. 1713-1725, https://doi.org/10.1007/s10646-011-0756-4.","productDescription":"13 p.","startPage":"1713","endPage":"1725","numberOfPages":"13","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":243846,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"7","noUsgsAuthors":false,"publicationDate":"2011-09-08","publicationStatus":"PW","scienceBaseUri":"505a53c1e4b0c8380cd6ccc1","contributors":{"authors":[{"text":"Schmeltz, D.","contributorId":14662,"corporation":false,"usgs":true,"family":"Schmeltz","given":"D.","email":"","affiliations":[],"preferred":false,"id":446531,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Evers, D.C.","contributorId":36501,"corporation":false,"usgs":true,"family":"Evers","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":446533,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Driscoll, C. T.","contributorId":47530,"corporation":false,"usgs":false,"family":"Driscoll","given":"C.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":446536,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Artz, R.","contributorId":16242,"corporation":false,"usgs":true,"family":"Artz","given":"R.","affiliations":[],"preferred":false,"id":446532,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cohen, M.","contributorId":92886,"corporation":false,"usgs":true,"family":"Cohen","given":"M.","email":"","affiliations":[],"preferred":false,"id":446539,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Gay, D.","contributorId":10635,"corporation":false,"usgs":true,"family":"Gay","given":"D.","affiliations":[],"preferred":false,"id":446529,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Haeuber, R.","contributorId":52528,"corporation":false,"usgs":true,"family":"Haeuber","given":"R.","affiliations":[],"preferred":false,"id":446537,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Krabbenhoft, D. P. 0000-0003-1964-5020","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":90765,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"D. P.","affiliations":[],"preferred":false,"id":446538,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Mason, R.","contributorId":11439,"corporation":false,"usgs":true,"family":"Mason","given":"R.","affiliations":[],"preferred":false,"id":446530,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Morris, K.","contributorId":38805,"corporation":false,"usgs":true,"family":"Morris","given":"K.","email":"","affiliations":[],"preferred":false,"id":446534,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Wiener, J.G.","contributorId":44107,"corporation":false,"usgs":true,"family":"Wiener","given":"J.G.","email":"","affiliations":[],"preferred":false,"id":446535,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}}
,{"id":70034936,"text":"70034936 - 2011 - Seasonal distribution of Gulf of Mexico sturgeon in the pensacola bay system, Florida","interactions":[],"lastModifiedDate":"2021-03-04T12:50:47.509992","indexId":"70034936","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2166,"text":"Journal of Applied Ichthyology","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal distribution of Gulf of Mexico sturgeon in the pensacola bay system, Florida","docAbstract":"<p><span>Temporal and spatial distributions of Gulf of Mexico (Gulf) sturgeon&nbsp;</span><i>Acipenser oxyrinchus desotoi</i><span>&nbsp;were assessed in the Pensacola bay system, Florida, using stationary ultrasonic telemetry. Fifty‐eight Gulf sturgeon were tagged within the Escambia (n = 26), Yellow (n = 8), Blackwater (n = 12) and Choctawhatchee Rivers (n = 12) in June, July, September and October, 2005. Fifty‐four Gulf sturgeon were detected at least once during the study. Migration of sturgeon occurred throughout the bay system in fall, to various winter habitats in the Gulf of Mexico and Santa Rosa Sound. In spring, tagged sturgeon migrated back through the bay system to summer habitats in rivers. Based on the duration and number of detections, Gulf sturgeon primarily used the upper portions of East and Escambia Bays as migration routes in and out of all rivers during spring and summer and inhabited the lower portion of Pensacola Bay for longer durations in fall and winter. Specific areas within the Pensacola bay system were used in summer and winter that were not previously documented as essential sturgeon habitat. Areas in southeastern Pensacola Bay were heavily used during winter by a large portion of the population. Gulf sturgeon also exhibited long‐term winter residency in Santa Rosa Sound for two consecutive years. An area in northeastern Escambia Bay supported Gulf sturgeon during the summer, which was unexpected and can not be explained by the data from this study. However, the discovery that Gulf sturgeon remain in the bay during the summer has important ecological and management implications that need further investigation.</span></p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1439-0426.2011.01724.x","issn":"01758659","usgsCitation":"Duncan, M., Wrege, B., Parauka, F.M., and Isely, J.J., 2011, Seasonal distribution of Gulf of Mexico sturgeon in the pensacola bay system, Florida: Journal of Applied Ichthyology, v. 27, no. 2, p. 316-321, https://doi.org/10.1111/j.1439-0426.2011.01724.x.","productDescription":"6 p.","startPage":"316","endPage":"321","costCenters":[],"links":[{"id":475528,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1439-0426.2011.01724.x","text":"Publisher Index Page"},{"id":243836,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Florida","otherGeospatial":"Pensacola Bay system","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -88.3740234375,\n              27.508271413876017\n            ],\n            [\n              -84.88037109375,\n              27.508271413876017\n            ],\n            [\n              -84.88037109375,\n              30.80791068136646\n            ],\n            [\n              -88.3740234375,\n              30.80791068136646\n            ],\n            [\n              -88.3740234375,\n              27.508271413876017\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"27","issue":"2","noUsgsAuthors":false,"publicationDate":"2011-03-28","publicationStatus":"PW","scienceBaseUri":"505b8894e4b08c986b316a40","contributors":{"authors":[{"text":"Duncan, M.S.","contributorId":99750,"corporation":false,"usgs":true,"family":"Duncan","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":448397,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wrege, B.M.","contributorId":100405,"corporation":false,"usgs":true,"family":"Wrege","given":"B.M.","affiliations":[],"preferred":false,"id":448398,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Parauka, Frank M.","contributorId":47115,"corporation":false,"usgs":true,"family":"Parauka","given":"Frank","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":448395,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Isely, J. Jeffery","contributorId":97224,"corporation":false,"usgs":true,"family":"Isely","given":"J.","email":"","middleInitial":"Jeffery","affiliations":[],"preferred":false,"id":448396,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70035394,"text":"70035394 - 2011 - Shallow conduit system at Kilauea Volcano, Hawaii, revealed by seismic signals associated with degassing bursts","interactions":[],"lastModifiedDate":"2012-12-10T16:10:47","indexId":"70035394","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Shallow conduit system at Kilauea Volcano, Hawaii, revealed by seismic signals associated with degassing bursts","docAbstract":"Eruptive activity at the summit of Kilauea Volcano, Hawaii, beginning in March, 2008 and continuing to the present time is characterized by episodic explosive bursts of gas and ash from a vent within Halemaumau Pit Crater. These bursts are accompanied by seismic signals that are well recorded by a broadband network deployed in the summit caldera. We investigate in detail the dimensions and oscillation modes of the source of a representative burst in the 1−10 s band. An extended source is realized by a set of point sources distributed on a grid surrounding the source centroid, where the centroid position and source geometry are fixed from previous modeling of very-long-period (VLP) data in the 10–50 s band. The source time histories of all point sources are obtained simultaneously through waveform inversion carried out in the frequency domain. Short-scale noisy fluctuations of the source time histories between adjacent sources are suppressed with a smoothing constraint, whose strength is determined through a minimization of the Akaike Bayesian Information Criterion (ABIC). Waveform inversions carried out for homogeneous and heterogeneous velocity structures both image a dominant source component in the form of an east trending dike with dimensions of 2.9 × 2.9 km. The dike extends ∼2 km west and ∼0.9 km east of the VLP centroid and spans the depth range 0.2–3.1 km. The source model for a homogeneous velocity structure suggests the dike is hinged at the source centroid where it bends from a strike E 27°N with northern dip of 85° west of the centroid, to a strike E 7°N with northern dip of 80° east of the centroid. The oscillating behavior of the dike is dominated by simple harmonic modes with frequencies ∼0.2 Hz and ∼0.5 Hz, representing the fundamental mode <i>ν</i><sub>11</sub> and first degenerate mode <i>ν</i><sub>12</sub> = <i>ν</i><sub>21</sub> of the dike. Although not strongly supported by data in the 1–10 s band, a north striking dike segment is required for enhanced compatibility with the model elaborated in the 10–50 s band. This dike provides connectivity between the east trending dike and the new vent within Halemaumau Pit Crater. Waveform inversions with a dual-dike model suggest dimensions of 0.7 × 0.7 km to 2.6 × 2.6 km for this segment. Further elaboration of the complex dike system under Halemaumau does not appear to be feasible with presently available data.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research B: Solid Earth","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysical Union","publisherLocation":"Washington, D.C.","doi":"10.1029/2011JB008677","issn":"01480227","usgsCitation":"Chouet, B., and Dawson, P., 2011, Shallow conduit system at Kilauea Volcano, Hawaii, revealed by seismic signals associated with degassing bursts: Journal of Geophysical Research B: Solid Earth, v. 116, no. 12, https://doi.org/10.1029/2011JB008677.","productDescription":"22 p.","startPage":"B12317","costCenters":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":487252,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2011jb008677","text":"Publisher Index Page"},{"id":215229,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2011JB008677"},{"id":243018,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Hawai'i","otherGeospatial":"Kilauea Volcano","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -155.798371,19.056854 ], [ -155.798371,19.550464 ], [ -155.016307,19.550464 ], [ -155.016307,19.056854 ], [ -155.798371,19.056854 ] ] ] } } ] }","volume":"116","issue":"12","noUsgsAuthors":false,"publicationDate":"2011-12-29","publicationStatus":"PW","scienceBaseUri":"505b8e1ae4b08c986b31872d","contributors":{"authors":[{"text":"Chouet, Bernard","contributorId":65485,"corporation":false,"usgs":true,"family":"Chouet","given":"Bernard","affiliations":[],"preferred":false,"id":450449,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dawson, Phillip","contributorId":21780,"corporation":false,"usgs":true,"family":"Dawson","given":"Phillip","affiliations":[],"preferred":false,"id":450448,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70034533,"text":"70034533 - 2011 - Waves and tides responsible for the intermittent closure of the entrance of a small, sheltered tidal wetland at San Francisco, CA","interactions":[],"lastModifiedDate":"2021-04-16T21:04:01.705421","indexId":"70034533","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1333,"text":"Continental Shelf Research","active":true,"publicationSubtype":{"id":10}},"title":"Waves and tides responsible for the intermittent closure of the entrance of a small, sheltered tidal wetland at San Francisco, CA","docAbstract":"<p><span>Crissy Field Marsh (CFM;&nbsp;</span><a rel=\"noreferrer noopener\" href=\"http://www.nps.gov/prsf/planyourvisit/crissy-field-marsh-and-beach.htm\" target=\"_blank\" data-mce-href=\"http://www.nps.gov/prsf/planyourvisit/crissy-field-marsh-and-beach.htm\">http://www.nps.gov/prsf/planyourvisit/crissy-field-marsh-and-beach.htm</a><span>) is a small, restored tidal wetland located in the entrance to San Francisco Bay just east of the Golden Gate. The marsh is small but otherwise fairly typical of many such restored wetlands worldwide. The marsh is hydraulically connected to the bay and the adjacent Pacific Ocean by a narrow sandy channel. The channel often migrates and sometimes closes completely, which effectively blocks the tidal connection to the ocean and disrupts the hydraulics and ecology of the marsh. Field measurements of waves and tides have been examined in order to evaluate the conditions responsible for the intermittent closure of the marsh entrance. The most important factor found to bring about the entrance channel closure is the occurrence of large ocean waves. However, there were also a few closure events during times with relatively small offshore waves. Examination of the deep-water directional wave spectra during these times indicates the presence of a small secondary peak corresponding to long period swell from the southern hemisphere, indicating that CFM and San Francisco Bay in general may be more susceptible to long period ocean swell emanating from the south or southwest than the more common ocean waves coming from the northwest. The tidal records during closure events show no strong relationship between closures and tides, other than that closures tend to occur during multi-day periods with successively increasing high tides. It can be inferred from these findings that the most important process to the intermittent closure of the entrance to CFM is littoral sediment transport driven by the influence of ocean swell waves breaking along the CFM shoreline at oblique angles. During periods of large, oblique waves the littoral transport of sand likely overwhelms the scour potential of the tidal flow in the entrance channel.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.csr.2011.07.004","issn":"02784343","usgsCitation":"Hanes, D., Ward, K., and Erikson, L.H., 2011, Waves and tides responsible for the intermittent closure of the entrance of a small, sheltered tidal wetland at San Francisco, CA: Continental Shelf Research, v. 31, no. 16, p. 1682-1687, https://doi.org/10.1016/j.csr.2011.07.004.","productDescription":"6 p.","startPage":"1682","endPage":"1687","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true}],"links":[{"id":243439,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Francisco","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -122.6953125,\n              37.48793540168987\n            ],\n            [\n              -122.18170166015625,\n              37.48793540168987\n            ],\n            [\n              -122.18170166015625,\n              37.920367835943516\n            ],\n            [\n              -122.6953125,\n              37.920367835943516\n            ],\n            [\n              -122.6953125,\n              37.48793540168987\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"31","issue":"16","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bcfa4e4b08c986b32ea0c","contributors":{"authors":[{"text":"Hanes, D.M.","contributorId":22479,"corporation":false,"usgs":true,"family":"Hanes","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":446254,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ward, K.","contributorId":95715,"corporation":false,"usgs":true,"family":"Ward","given":"K.","email":"","affiliations":[],"preferred":false,"id":446255,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Erikson, L. H.","contributorId":21366,"corporation":false,"usgs":true,"family":"Erikson","given":"L.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":446253,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70036414,"text":"70036414 - 2011 - Changes in monoterpene mixing ratios during summer storms in rural New Hampshire (USA)","interactions":[],"lastModifiedDate":"2021-01-12T17:54:49.252301","indexId":"70036414","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":922,"text":"Atmospheric Chemistry and Physics","active":true,"publicationSubtype":{"id":10}},"title":"Changes in monoterpene mixing ratios during summer storms in rural New Hampshire (USA)","docAbstract":"<p><span>Monoterpenes are an important class of biogenic hydrocarbons that influence ambient air quality and are a principle source of secondary organic aerosol (SOA). Emitted from vegetation, monoterpenes are a product of photosynthesis and act as a response to a variety of environmental factors. Most parameterizations of monoterpene emissions are based on clear weather models that do not take into account episodic conditions that can drastically change production and release rates into the atmosphere. Here, the monoterpene dataset from the rural Thompson Farm measurement site in Durham, New Hampshire is examined in the context of a set of known severe storm events. While some storm systems had a negligible influence on ambient monoterpene mixing ratios, the average storm event increased mixing ratios by 0.59 ± 0.21 ppbv, a factor of 93% above pre-storm levels. In some events, mixing ratios reached the 10's of ppbv range and persisted overnight. These mixing ratios correspond to increases in the monoterpene emission rate, ranging from 120 to 1240 g km</span><sup>−2</sup><span>&nbsp;h</span><sup>−1</sup><span>&nbsp;compared to an estimated clear weather rate of 116 to 193 g km</span><sup>−2</sup><span>&nbsp;h</span><sup>−1</sup><span>. Considering the regularity of storm events over most forested areas, this could be an important factor to consider when modeling global monoterpene emissions and their resulting influence on the formation of organic aerosols.</span></p>","language":"English","publisher":"Copernicus Publications","publisherLocation":"Göttingen, Germany","doi":"10.5194/acp-11-11465-2011","issn":"16807316","usgsCitation":"Haase, K.B., Jordan, C., Mentis, E., Cottrell, L., Mayne, H., Talbot, R., and Sive, B., 2011, Changes in monoterpene mixing ratios during summer storms in rural New Hampshire (USA): Atmospheric Chemistry and Physics, v. 11, no. 22, p. 11465-11476, https://doi.org/10.5194/acp-11-11465-2011.","productDescription":"9 p.","startPage":"11465","endPage":"11476","costCenters":[{"id":146,"text":"Branch of Regional Research-Eastern Region","active":false,"usgs":true}],"links":[{"id":475112,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.5194/acp-11-11465-2011","text":"Publisher Index Page"},{"id":246256,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218261,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.5194/acp-11-11465-2011"}],"country":"United States","state":"New Hampshire","otherGeospatial":"Thompson Farm","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -71.35345458984375,\n              42.92626291864936\n            ],\n            [\n              -70.740966796875,\n              42.92626291864936\n            ],\n            [\n              -70.740966796875,\n              43.329173667843904\n            ],\n            [\n              -71.35345458984375,\n              43.329173667843904\n            ],\n            [\n              -71.35345458984375,\n              42.92626291864936\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"11","issue":"22","noUsgsAuthors":false,"publicationDate":"2011-11-17","publicationStatus":"PW","scienceBaseUri":"5059f41ce4b0c8380cd4bb4b","contributors":{"authors":[{"text":"Haase, Karl B. 0000-0002-6897-6494 khaase@usgs.gov","orcid":"https://orcid.org/0000-0002-6897-6494","contributorId":3405,"corporation":false,"usgs":true,"family":"Haase","given":"Karl","email":"khaase@usgs.gov","middleInitial":"B.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":456018,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jordan, C.","contributorId":17454,"corporation":false,"usgs":true,"family":"Jordan","given":"C.","email":"","affiliations":[],"preferred":false,"id":456019,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mentis, E.","contributorId":62441,"corporation":false,"usgs":true,"family":"Mentis","given":"E.","email":"","affiliations":[],"preferred":false,"id":456021,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cottrell, L.","contributorId":64925,"corporation":false,"usgs":true,"family":"Cottrell","given":"L.","email":"","affiliations":[],"preferred":false,"id":456022,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mayne, H.R.","contributorId":21016,"corporation":false,"usgs":true,"family":"Mayne","given":"H.R.","email":"","affiliations":[],"preferred":false,"id":456020,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Talbot, R.","contributorId":67758,"corporation":false,"usgs":true,"family":"Talbot","given":"R.","email":"","affiliations":[],"preferred":false,"id":456024,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Sive, B.C.","contributorId":66518,"corporation":false,"usgs":true,"family":"Sive","given":"B.C.","email":"","affiliations":[],"preferred":false,"id":456023,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70036331,"text":"70036331 - 2011 - Barrier island response to late Holocene climate events, North Carolina, USA","interactions":[],"lastModifiedDate":"2021-01-18T21:05:41.317781","indexId":"70036331","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Barrier island response to late Holocene climate events, North Carolina, USA","docAbstract":"<p>T<span>he Outer Banks barrier islands of North Carolina, USA, contain a geologic record of inlet activity that extends from ca. 2200 cal yr BP to the present, and can be used as a proxy for storm activity. Optically stimulated luminescence (OSL) dating (26 samples) of inlet-fill and flood tide delta deposits, recognized in cores and geophysical data, provides the basis for understanding the chronology of storm impacts and comparison to other paleoclimate proxy data. OSL ages of historical inlet fill compare favorably to historical documentation of inlet activity, providing confidence in the technique. Comparison suggests that the Medieval Warm Period (MWP) and Little Ice Age (LIA) were both characterized by elevated storm conditions as indicated by much greater inlet activity relative to today. Given present understanding of atmospheric circulation patterns and sea-surface temperatures during the MWP and LIA, we suggest that increased inlet activity during the MWP responded to intensified hurricane impacts, while elevated inlet activity during the LIA was in response to increased nor'easter activity. A general decrease in storminess at mid-latitudes in the North Atlantic over the last 300 yr has allowed the system to evolve into a more continuous barrier with few inlets.</span></p>","language":"English","publisher":"Cambridge University Press","doi":"10.1016/j.yqres.2011.05.001","issn":"00335894","usgsCitation":"Mallinson, D.J., Smith, C.W., Mahan, S., Culver, S., and McDowell, K., 2011, Barrier island response to late Holocene climate events, North Carolina, USA: Quaternary Research, v. 76, no. 1, p. 46-57, https://doi.org/10.1016/j.yqres.2011.05.001.","productDescription":"12 p.","startPage":"46","endPage":"57","costCenters":[],"links":[{"id":246476,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218464,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.yqres.2011.05.001"}],"country":"United States","state":"North Carolina","otherGeospatial":"Barrier Islands","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -76.915283203125,\n              34.67839374011646\n            ],\n            [\n              -75.333251953125,\n              34.67839374011646\n            ],\n            [\n              -75.333251953125,\n              36.12900165569652\n            ],\n            [\n              -76.915283203125,\n              36.12900165569652\n            ],\n            [\n              -76.915283203125,\n              34.67839374011646\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"76","issue":"1","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"5059efbee4b0c8380cd4a418","contributors":{"authors":[{"text":"Mallinson, D. J.","contributorId":71745,"corporation":false,"usgs":true,"family":"Mallinson","given":"D.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":455562,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Smith, C. W.","contributorId":57457,"corporation":false,"usgs":true,"family":"Smith","given":"C.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":455561,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mahan, S.","contributorId":98894,"corporation":false,"usgs":true,"family":"Mahan","given":"S.","email":"","affiliations":[],"preferred":false,"id":455563,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Culver, S.J.","contributorId":53970,"corporation":false,"usgs":true,"family":"Culver","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":455560,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"McDowell, K.","contributorId":10267,"corporation":false,"usgs":true,"family":"McDowell","given":"K.","email":"","affiliations":[],"preferred":false,"id":455559,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033930,"text":"70033930 - 2011 - Nest success of grassland sparrows on reclaimed surface mines","interactions":[],"lastModifiedDate":"2012-03-12T17:21:32","indexId":"70033930","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Nest success of grassland sparrows on reclaimed surface mines","docAbstract":"Grasslands resulting from surface mine reclamation support grassland songbird populations in several midwestern and eastern states in the United States, especially where reclaimed mines are large (&gt;1,000ha). However, most reclaimed surface mines in Pennsylvania are small (&lt;200ha), and nest success is unknown. We evaluated nest success of grasshopper (Ammodramus savannarum), Henslow's (A. henslowii), and Savannah sparrows (Passerculus sandwichensis) on 4 reclaimed surface mines (50-180ha) in western Pennsylvania, USA from 2006 to 2007. Overall nest success based on mean covariate values was 0.435 (95% CI = 0.376-0.504) for grasshopper sparrows, 0.396 (95% CI = 0.295-0.533) for Henslow's sparrows, and 0.158 (95% CI = 0.063-0.392) for Savannah sparrows. These estimates of nest success are comparable to those on larger reclaimed mines and other habitats. Grasshopper and Henslow's sparrow nests that were well concealed were less likely to fail than highly visible nests (??visible = -0.028, CI = -0.051 to -0.005 for grasshopper sparrows; ??visible = -0.063, CI = -0.112 to -0.014 for Henslow's sparrows), and nests in areas with surrounding deep litter were more likely to fail than nests in areas with shallow litter (??litterD = -0.145, CI = -0.335 to 0.045 for grasshopper sparrows; ??litterD = -0.676, CI = -1.187 to -0.116 for Henslow's sparrows). Savannah sparrow nests in areas with high visual obstruction by vegetation were less likely to fail than nests in areas with sparse and short vegetation (??VisOb = 0.048, CI = 0.006-0.091). Daily probability of survival for grasshopper sparrow nests was greatest early and late in the breeding season, and Savannah sparrow nest survival followed a decreasing linear trend. Nest survival of Henslow's sparrows was greater on warm days (??temp = 0.197, CI = 0.014-0.379), whereas for Savannah sparrows nest survival decreased on warm days and on days with rain, but for Savannah sparrows confidence intervals of weather effects included zero (??temp = -0.098, CI = -0.246 to 0.050; ??rain = 3.13, CI = -14.19 to 20.45). We suggest that small reclaimed surface mine grasslands can provide valuable nesting habitat and could be important to the conservation of grassland bird populations. Because nest success can increase in the latter part of the nesting season, agricultural disturbances or management activities in mid- to late summer could adversely affect reproductive success. ?? 2011 The Wildlife Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/jwmg.70","issn":"0022541X","usgsCitation":"Stauffer, G., Diefenbach, D., Marshall, M., and Brauning, D., 2011, Nest success of grassland sparrows on reclaimed surface mines: Journal of Wildlife Management, v. 75, no. 3, p. 548-557, https://doi.org/10.1002/jwmg.70.","startPage":"548","endPage":"557","numberOfPages":"10","costCenters":[],"links":[{"id":242044,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214327,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/jwmg.70"}],"volume":"75","issue":"3","noUsgsAuthors":false,"publicationDate":"2011-05-11","publicationStatus":"PW","scienceBaseUri":"505a6486e4b0c8380cd729f5","contributors":{"authors":[{"text":"Stauffer, G.E.","contributorId":59253,"corporation":false,"usgs":true,"family":"Stauffer","given":"G.E.","email":"","affiliations":[],"preferred":false,"id":443233,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Diefenbach, Duane R. 0000-0001-5111-1147","orcid":"https://orcid.org/0000-0001-5111-1147","contributorId":106592,"corporation":false,"usgs":true,"family":"Diefenbach","given":"Duane R.","affiliations":[],"preferred":false,"id":443235,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marshall, M.R.","contributorId":82427,"corporation":false,"usgs":true,"family":"Marshall","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":443234,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brauning, D.W.","contributorId":45129,"corporation":false,"usgs":true,"family":"Brauning","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":443232,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70034070,"text":"70034070 - 2011 - Viruses and bacteria in karst and fractured rock aquifers in east Tennessee, USA","interactions":[],"lastModifiedDate":"2017-05-04T11:00:49","indexId":"70034070","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Viruses and bacteria in karst and fractured rock aquifers in east Tennessee, USA","docAbstract":"<p>A survey of enteric viruses and indicator bacteria was carried out in eight community water supply sources (four wells and four springs) in East Tennessee. Seven sites derived their water from carbonate aquifers and one from fractured sandstone. Four of the sites were deemed \"low-risk\" based on prior monitoring of fecal indicators and factors such as presence of thick layers of overlying sediments. The remaining sites were deemed \"high-risk.\" Enteric viruses (enterovirus and reovirus) were detected by cell culture at least once in seven of the eight wells or springs including all but one of the four low-risk sites. Viral RNA, however, was not detected in any of the samples by reverse transcription-polymerase chain reaction. Conventional indicators of microbial contamination (Escherichia coli and total coliform bacteria) were detected together with culturable viruses in seven of nine virus positive samples. Bacteroides, an alternative fecal indicator which has not previously been used in groundwater investigations, was also detected in all but one of the samples containing E. coli or total coliform bacteria, as well as in one sample where viruses were present in the absence of other bacterial indicators. The study highlights some of the challenges involved in surveys of virus occurrence and indicates that culturable enteric viruses in East Tennessee karst aquifers may be more widespread than previously observed in studies of karst aquifers in Pennsylvania (8%), the Ozark region of Missouri (&lt; 1%), or several other states covered in a national microbial water quality survey conducted by the U.S. Environmental Protection Agency (43%). Copyright ?? 2010 The Author(s). Journal compilation ?? 2010 National Ground Water Association.</p>","largerWorkTitle":"Ground Water","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.2010.00698.x","issn":"0017467X","usgsCitation":"Johnson, T., McKay, L., Layton, A., Jones, S., Johnson, G., Cashdollar, J., Dahling, D., Villegas, L., Fout, G., Williams, D., and Sayler, G., 2011, Viruses and bacteria in karst and fractured rock aquifers in east Tennessee, USA: Ground Water, v. 49, no. 1, p. 98-110, https://doi.org/10.1111/j.1745-6584.2010.00698.x.","productDescription":"13 p.","startPage":"98","endPage":"110","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-012916","costCenters":[],"links":[{"id":244800,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216901,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2010.00698.x"}],"volume":"49","issue":"1","noUsgsAuthors":false,"publicationDate":"2010-12-22","publicationStatus":"PW","scienceBaseUri":"505bc27fe4b08c986b32ab98","contributors":{"authors":[{"text":"Johnson, T.B.","contributorId":21490,"corporation":false,"usgs":true,"family":"Johnson","given":"T.B.","email":"","affiliations":[],"preferred":false,"id":443920,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKay, L.D.","contributorId":10185,"corporation":false,"usgs":true,"family":"McKay","given":"L.D.","email":"","affiliations":[],"preferred":false,"id":443917,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Layton, A.C.","contributorId":18205,"corporation":false,"usgs":true,"family":"Layton","given":"A.C.","email":"","affiliations":[],"preferred":false,"id":443919,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jones, S.W.","contributorId":102299,"corporation":false,"usgs":true,"family":"Jones","given":"S.W.","email":"","affiliations":[],"preferred":false,"id":443927,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Johnson, G.C.","contributorId":14450,"corporation":false,"usgs":true,"family":"Johnson","given":"G.C.","email":"","affiliations":[],"preferred":false,"id":443918,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Cashdollar, J.L.","contributorId":54043,"corporation":false,"usgs":true,"family":"Cashdollar","given":"J.L.","affiliations":[],"preferred":false,"id":443923,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Dahling, D.R.","contributorId":43163,"corporation":false,"usgs":true,"family":"Dahling","given":"D.R.","email":"","affiliations":[],"preferred":false,"id":443922,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Villegas, L.F.","contributorId":34747,"corporation":false,"usgs":true,"family":"Villegas","given":"L.F.","email":"","affiliations":[],"preferred":false,"id":443921,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Fout, G.S.","contributorId":88146,"corporation":false,"usgs":true,"family":"Fout","given":"G.S.","email":"","affiliations":[],"preferred":false,"id":443926,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Williams, D.E.","contributorId":67179,"corporation":false,"usgs":true,"family":"Williams","given":"D.E.","email":"","affiliations":[],"preferred":false,"id":443924,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Sayler, G.","contributorId":72231,"corporation":false,"usgs":true,"family":"Sayler","given":"G.","email":"","affiliations":[],"preferred":false,"id":443925,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}}
,{"id":70035700,"text":"70035700 - 2011 - Watershed morphology of highland and mountain ecoregions in eastern Oklahoma","interactions":[],"lastModifiedDate":"2021-05-20T21:33:57.659927","indexId":"70035700","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3191,"text":"Professional Geographer","active":true,"publicationSubtype":{"id":10}},"title":"Watershed morphology of highland and mountain ecoregions in eastern Oklahoma","docAbstract":"<p><span>The fluvial system represents a nested hierarchy that reflects the relationship among different spatial and temporal scales. Within the hierarchy, larger scale variables influence the characteristics of the next lower nested scale. Ecoregions represent one of the largest scales in the fluvial hierarchy and are defined by recurring patterns of geology, climate, land use, soils, and potential natural vegetation. Watersheds, the next largest scale, are often nested into a single ecoregion and therefore have properties that are indicative of a given ecoregion. Differences in watershed morphology (relief, drainage density, circularity ratio, relief ratio, and ruggedness number) were evaluated among three ecoregions in eastern Oklahoma: Ozark Highlands, Boston Mountains, and Ouachita Mountains. These ecoregions were selected because of their high-quality stream resources and diverse aquatic communities and are of special management interest to the Oklahoma Department of Wildlife Conservation. One hundred thirty-four watersheds in first- through fourth-order streams were compared. Using a nonparametric, two-factor analysis of variance (α= 0.05) we concluded that the relief, drainage density, relief ratio, and ruggedness number all changed among ecoregion and stream order, whereas circularity ratio only changed with stream order. Our study shows that ecoregions can be used as a broad-scale framework for watershed management.</span></p>","language":"English","publisher":"Taylor & Francis","doi":"10.1080/00330124.2010.533575","usgsCitation":"Splinter, D.K., Dauwalter, D., Marston, R.A., and Fisher, W., 2011, Watershed morphology of highland and mountain ecoregions in eastern Oklahoma: Professional Geographer, v. 63, no. 1, p. 131-143, https://doi.org/10.1080/00330124.2010.533575.","productDescription":"13 p.","startPage":"131","endPage":"143","costCenters":[{"id":199,"text":"Coop Res Unit Leetown","active":true,"usgs":true}],"links":[{"id":244077,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oklahoma","otherGeospatial":"Eastern Oklahoma","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -94.6142578125,\n              36.721273880045004\n            ],\n            [\n              -94.76806640624999,\n              36.96744946416934\n            ],\n            [\n              -95.29541015625,\n              36.80928470205937\n            ],\n            [\n              -95.5810546875,\n              36.38591277287651\n            ],\n            [\n              -94.89990234375,\n              36.10237644873644\n            ],\n            [\n              -94.74609375,\n              34.92197103616377\n            ],\n            [\n              -95.3173828125,\n              34.831841149828655\n            ],\n            [\n              -96.1083984375,\n              34.687427949314845\n            ],\n            [\n              -96.064453125,\n              34.361576287484176\n            ],\n            [\n              -95.712890625,\n              34.23451236236987\n            ],\n            [\n              -94.52636718749999,\n              34.125447565116126\n            ],\n            [\n              -94.54833984375,\n              35.7286770448517\n            ],\n            [\n              -94.6142578125,\n              36.721273880045004\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"63","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bcf78e4b08c986b32e8f8","contributors":{"authors":[{"text":"Splinter, D. K.","contributorId":9083,"corporation":false,"usgs":false,"family":"Splinter","given":"D.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":451970,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dauwalter, Daniel C.","contributorId":224829,"corporation":false,"usgs":false,"family":"Dauwalter","given":"Daniel C.","affiliations":[{"id":37131,"text":"Trout Unlimited","active":true,"usgs":false}],"preferred":false,"id":451973,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marston, R. A.","contributorId":52422,"corporation":false,"usgs":false,"family":"Marston","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":451971,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fisher, William wfisher@usgs.gov","contributorId":206607,"corporation":false,"usgs":true,"family":"Fisher","given":"William","email":"wfisher@usgs.gov","affiliations":[{"id":199,"text":"Coop Res Unit Leetown","active":true,"usgs":true}],"preferred":true,"id":451972,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70036236,"text":"70036236 - 2011 - Oligocene and Miocene arc volcanism in northeastern California: evidence for post-Eocene segmentation of the subducting Farallon plate","interactions":[],"lastModifiedDate":"2013-07-23T09:31:15","indexId":"70036236","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1820,"text":"Geosphere","active":true,"publicationSubtype":{"id":10}},"title":"Oligocene and Miocene arc volcanism in northeastern California: evidence for post-Eocene segmentation of the subducting Farallon plate","docAbstract":"The Warner Range in northeastern California exposes a section of Tertiary rocks over 3 km thick, offering a unique opportunity to study the long-term history of Cascade arc volcanism in an area otherwise covered by younger volcanic rocks. The oldest locally sourced volcanic rocks in the Warner Range are Oligocene (28–24 Ma) and include a sequence of basalt and basaltic andesite lava flows overlain by hornblende and pyroxene andesite pyroclastic flows and minor lava flows. Both sequences vary in thickness (0–2 km) along strike and are inferred to be the erosional remnants of one or more large, partly overlapping composite volcanoes. No volcanic rocks were erupted in the Warner Range between ca. 24 and 16 Ma, although minor distally sourced silicic tuffs were deposited during this time. Arc volcanism resumed ca. 16 Ma with eruption of basalt and basaltic andesite lavas sourced from eruptive centers 5–10 km south of the relict Oligocene centers. Post–16 Ma arc volcanism continued until ca. 8 Ma, forming numerous eroded but well-preserved shield volcanoes to the south of the Warner Range. Oligocene to Late Miocene volcanic rocks in and around the Warner Range are calc-alkaline basalts to andesites (48%–61% SiO<sub>2</sub>) that display negative Ti, Nb, and Ta anomalies in trace element spider diagrams, consistent with an arc setting. Middle Miocene lavas in the Warner Range are distinctly different in age, composition, and eruptive style from the nearby Steens Basalt, with which they were previously correlated. Middle to Late Miocene shield volcanoes south of the Warner Range consist of homogeneous basaltic andesites (53%–57% SiO<sub>2</sub>) that are compositionally similar to Oligocene rocks in the Warner Range. They are distinctly different from younger (Late Miocene to Pliocene) high-Al, low-K olivine tholeiites, which are more mafic (46%–49% SiO<sub>2</sub>), did not build large edifices, and are thought to be related to backarc extension. The Warner Range is ∼100 km east of the axis of the modern arc in northeastern California, suggesting that the Cascade arc south of modern Mount Shasta migrated west during the Late Miocene and Pliocene, while the arc north of Mount Shasta remained in essentially the same position. We interpret these patterns as evidence for an Eocene to Miocene tear in the subducting slab, with a more steeply dipping plate segment to the north, and an initially more gently dipping segment to the south that gradually steepened from the Middle Miocene to the present.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geosphere","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Geological Society of America","doi":"10.1130/GES00650.1","issn":"1553040X","usgsCitation":"Colgan, J., Egger, A., John, D., Cousens, B., Fleck, R., and Henry, C., 2011, Oligocene and Miocene arc volcanism in northeastern California: evidence for post-Eocene segmentation of the subducting Farallon plate: Geosphere, v. 7, no. 3, p. 733-755, https://doi.org/10.1130/GES00650.1.","productDescription":"23 p.","startPage":"733","endPage":"755","costCenters":[{"id":671,"text":"Western Region Geology and Geophysics Science Center","active":false,"usgs":true}],"links":[{"id":246503,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218487,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/GES00650.1"}],"country":"United States","state":"California","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -124.41,32.53 ], [ -124.41,42.01 ], [ -114.13,42.01 ], [ -114.13,32.53 ], [ -124.41,32.53 ] ] ] } } ] }","volume":"7","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6d5fe4b0c8380cd750db","contributors":{"authors":[{"text":"Colgan, J.P.","contributorId":71678,"corporation":false,"usgs":true,"family":"Colgan","given":"J.P.","affiliations":[],"preferred":false,"id":455030,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Egger, A.E.","contributorId":70159,"corporation":false,"usgs":true,"family":"Egger","given":"A.E.","affiliations":[],"preferred":false,"id":455029,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"John, D. A.","contributorId":43748,"corporation":false,"usgs":true,"family":"John","given":"D. A.","affiliations":[],"preferred":false,"id":455026,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cousens, B.","contributorId":61683,"corporation":false,"usgs":true,"family":"Cousens","given":"B.","email":"","affiliations":[],"preferred":false,"id":455028,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Fleck, R.J.","contributorId":25147,"corporation":false,"usgs":true,"family":"Fleck","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":455025,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Henry, C.D.","contributorId":58306,"corporation":false,"usgs":true,"family":"Henry","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":455027,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70034100,"text":"70034100 - 2011 - 8 March 2010 Elazığ-Kovancilar (Turkey) Earthquake: observations on ground motions and building damage","interactions":[],"lastModifiedDate":"2017-10-31T10:49:13","indexId":"70034100","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3372,"text":"Seismological Research Letters","onlineIssn":"1938-2057","printIssn":"0895-0695","active":true,"publicationSubtype":{"id":10}},"title":"8 March 2010 Elazığ-Kovancilar (Turkey) Earthquake: observations on ground motions and building damage","docAbstract":"<p><span>An earthquake of&nbsp;</span><i>M<sub>W</sub></i><span><span>&nbsp;</span>= 6.1 occurred in the Elazığ region of eastern Turkey on 8 March 2010 at 02:32:34 UTC. The United States Geological Survey (USGS) reported the epicenter of the earthquake as 38.873°N-39.981°E with a focal depth of 12 km. Forty-two people lost their lives and 137 were injured during the event. The earthquake was reported to be on the left-lateral strike-slip east Anatolian fault (EAF), which is one of the two major active fault systems in Turkey. Teams from the Earthquake Engineering Research Center of the Middle East Technical University (EERC-METU) visited the earthquake area in the aftermath of the mainshock. Their reconnaissance observations were combined with interpretations of recorded ground motions for completeness. This article summarizes observations on building and ground damage in the area and provides a discussion of the recorded motions. No significant observations in terms of geotechnical engineering were made.</span></p>","language":"English","publisher":"Seismological Society of America","doi":"10.1785/gssrl.82.1.42","issn":"08950695","usgsCitation":"Akkar, S., Aldemir, A., Askan, A., Bakir, S., Canbay, E., Demirel, I., Erberik, M., Gulerce, Z., Gulkan, P., Kalkan, E., Prakash, S., Sandikkaya, M., Sevilgen, V., Ugurhan, B., and Yenier, E., 2011, 8 March 2010 Elazığ-Kovancilar (Turkey) Earthquake: observations on ground motions and building damage: Seismological Research Letters, v. 82, no. 1, p. 42-58, https://doi.org/10.1785/gssrl.82.1.42.","productDescription":"17 p.","startPage":"42","endPage":"58","numberOfPages":"17","ipdsId":"IP-022787","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":487169,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/11511/40896","text":"External Repository"},{"id":244767,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216869,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/gssrl.82.1.42"}],"country":"Turkey","volume":"82","issue":"1","noUsgsAuthors":false,"publicationDate":"2011-01-06","publicationStatus":"PW","scienceBaseUri":"5059e26de4b0c8380cd45b8e","contributors":{"authors":[{"text":"Akkar, Sinan","contributorId":39175,"corporation":false,"usgs":true,"family":"Akkar","given":"Sinan","email":"","affiliations":[],"preferred":false,"id":444083,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Aldemir, A.","contributorId":87002,"corporation":false,"usgs":true,"family":"Aldemir","given":"A.","email":"","affiliations":[],"preferred":false,"id":444093,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Askan, A.","contributorId":70623,"corporation":false,"usgs":true,"family":"Askan","given":"A.","affiliations":[],"preferred":false,"id":444089,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bakir, S.","contributorId":82158,"corporation":false,"usgs":true,"family":"Bakir","given":"S.","email":"","affiliations":[],"preferred":false,"id":444092,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Canbay, E.","contributorId":35568,"corporation":false,"usgs":true,"family":"Canbay","given":"E.","email":"","affiliations":[],"preferred":false,"id":444082,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Demirel, I.O.","contributorId":62435,"corporation":false,"usgs":true,"family":"Demirel","given":"I.O.","email":"","affiliations":[],"preferred":false,"id":444086,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Erberik, M.A.","contributorId":59653,"corporation":false,"usgs":true,"family":"Erberik","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":444085,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Gulerce, Z.","contributorId":13837,"corporation":false,"usgs":true,"family":"Gulerce","given":"Z.","email":"","affiliations":[],"preferred":false,"id":444080,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Gulkan, Polat","contributorId":78532,"corporation":false,"usgs":true,"family":"Gulkan","given":"Polat","email":"","affiliations":[],"preferred":false,"id":444090,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Kalkan, Erol 0000-0002-9138-9407 ekalkan@usgs.gov","orcid":"https://orcid.org/0000-0002-9138-9407","contributorId":1218,"corporation":false,"usgs":true,"family":"Kalkan","given":"Erol","email":"ekalkan@usgs.gov","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":444079,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Prakash, S.","contributorId":68992,"corporation":false,"usgs":true,"family":"Prakash","given":"S.","email":"","affiliations":[],"preferred":false,"id":444088,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Sandikkaya, M.A.","contributorId":29669,"corporation":false,"usgs":true,"family":"Sandikkaya","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":444081,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Sevilgen, V.","contributorId":79714,"corporation":false,"usgs":true,"family":"Sevilgen","given":"V.","email":"","affiliations":[],"preferred":false,"id":444091,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Ugurhan, B.","contributorId":56882,"corporation":false,"usgs":true,"family":"Ugurhan","given":"B.","email":"","affiliations":[],"preferred":false,"id":444084,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Yenier, E.","contributorId":64063,"corporation":false,"usgs":true,"family":"Yenier","given":"E.","email":"","affiliations":[],"preferred":false,"id":444087,"contributorType":{"id":1,"text":"Authors"},"rank":15}]}}
,{"id":70034273,"text":"70034273 - 2011 - Native Americans, regional drought and tree Island evolution in the Florida Everglades","interactions":[],"lastModifiedDate":"2013-03-17T11:22:00","indexId":"70034273","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1905,"text":"Holocene","active":true,"publicationSubtype":{"id":10}},"title":"Native Americans, regional drought and tree Island evolution in the Florida Everglades","docAbstract":"This study uses palynologic data to determine the effects of regional climate variability and human activity on the formation and development of tree islands during the last ~4000 years. Although prolonged periods of aridity have been invoked as one mechanism for their formation, Native American land use has also been hypothesized as a driver of tree island development. Using pollen assemblages from head and near tail sediments collected on two tree islands and documented archeological data, the relative roles of Native Americans, climate variability, and recent water-management practices in forming and structuring Everglades tree islands are examined. The timing of changes recorded in the pollen record indicates that tree islands developed from sawgrass marshes ~3800 cal. yr BP, prior to human occupation. Major tree island expansion, recorded near tail sediments, occurred ~1000 years after initial tree island formation. Comparison of the timing of pollen assemblages with other proxy records indicates that tree island expansion is related to regional and global aridity correlated with southward migration of the Intertropical Convergence Zone. Local fire associated with droughts may also have influenced tree island expansion. This work suggests that Native American occupation did not significantly influence tree island formation and that the most important factors governing tree island expansion are extreme hydrologic events due to droughts and intense twentieth century water management.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Holocene","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"SAGE Publications","publisherLocation":"Thousand Oaks, CA","doi":"10.1177/0959683611400204","issn":"09596836","usgsCitation":"Bernhardt, C., 2011, Native Americans, regional drought and tree Island evolution in the Florida Everglades: Holocene, v. 21, no. 6, p. 967-978, https://doi.org/10.1177/0959683611400204.","productDescription":"12 p.","startPage":"967","endPage":"978","numberOfPages":"12","costCenters":[{"id":146,"text":"Branch of Regional Research-Eastern Region","active":false,"usgs":true}],"links":[{"id":216522,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1177/0959683611400204"},{"id":244399,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Florida","otherGeospatial":"Florida Everglades","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 81.0,25.0 ], [ 81.0,27.0 ], [ 80.0,27.0 ], [ 80.0,25.0 ], [ 81.0,25.0 ] ] ] } } ] }","volume":"21","issue":"6","noUsgsAuthors":false,"publicationDate":"2011-04-20","publicationStatus":"PW","scienceBaseUri":"505a62a2e4b0c8380cd72024","contributors":{"authors":[{"text":"Bernhardt, C. 0000-0003-0082-4731","orcid":"https://orcid.org/0000-0003-0082-4731","contributorId":104307,"corporation":false,"usgs":true,"family":"Bernhardt","given":"C.","affiliations":[],"preferred":false,"id":445027,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70034361,"text":"70034361 - 2011 - Loss of volatile hydrocarbons from an LNAPL oil source","interactions":[],"lastModifiedDate":"2020-01-14T15:31:19","indexId":"70034361","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2233,"text":"Journal of Contaminant Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Loss of volatile hydrocarbons from an LNAPL oil source","docAbstract":"The light nonaqueous phase liquid (LNAPL) oil pool in an aquifer that resulted from a pipeline spill near Bemidji, Minnesota, was analyzed for volatile hydrocarbons (VHCs) to determine if the composition of the oil remains constant over time. Oil samples were obtained from wells at five locations in the oil pool in an anaerobic part of the glacial outwash aquifer. Samples covering a 21-year period were analyzed for 25 VHCs. Compared to the composition of oil from the pipeline source, VHCs identified in oil from wells sampled in 2008 were 13 to 64% depleted. The magnitude of loss for the VHCs analyzed was toluene ≫ o-xylene, benzene, C<sub>6</sub> and C<sub>10–12</sub>n-alkanes > C<sub>7</sub>–C<sub>9</sub>n-alkanes > m-xylene, cyclohexane, and 1- and 2-methylnaphthalene > 1,2,4-trimethylbenzene and ethylbenzene. Other VHCs including p-xylene, 1,3,5- and 1,2,3-trimethylbenzenes, the tetramethylbenzenes, methyl- and ethyl-cyclohexane, and naphthalene were not depleted during the time of the study. Water–oil and air–water batch equilibration simulations indicate that volatilization and biodegradation is most important for the C<sub>6</sub>–C<sub>9</sub>n-alkanes and cyclohexanes; dissolution and biodegradation is important for most of the other hydrocarbons. Depletion of the hydrocarbons in the oil pool is controlled by: the lack of oxygen and nutrients, differing rates of recharge, and the spatial distribution of oil in the aquifer. The mass loss of these VHCs in the 5 wells is between 1.6 and 7.4% in 29 years or an average annual loss of 0.06–0.26%/year. The present study shows that the composition of LNAPL changes over time and that these changes are spatially variable. This highlights the importance of characterizing the temporal and spatial variabilities of the source term in solute-transport models.","language":"English","publisher":"Elsevier","doi":"10.1016/j.jconhyd.2011.06.006","issn":"01697722","usgsCitation":"Baedecker, M.J., Eganhouse, R., Bekins, B.A., and Delin, G.N., 2011, Loss of volatile hydrocarbons from an LNAPL oil source: Journal of Contaminant Hydrology, v. 126, no. 3-4, p. 140-152, https://doi.org/10.1016/j.jconhyd.2011.06.006.","productDescription":"13 p.","startPage":"140","endPage":"152","costCenters":[{"id":146,"text":"Branch of Regional Research-Eastern Region","active":false,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":244785,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Minnesota","city":"Bemidji","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -95.0373,47.3762 ], [ -95.0373,47.6177 ], [ -94.6844,47.6177 ], [ -94.6844,47.3762 ], [ -95.0373,47.3762 ] ] ] } } ] }","volume":"126","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a49dee4b0c8380cd68956","contributors":{"authors":[{"text":"Baedecker, Mary Jo 0000-0002-4865-1043 mjbaedec@usgs.gov","orcid":"https://orcid.org/0000-0002-4865-1043","contributorId":197793,"corporation":false,"usgs":true,"family":"Baedecker","given":"Mary","email":"mjbaedec@usgs.gov","middleInitial":"Jo","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":779430,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Eganhouse, Robert P. eganhous@usgs.gov","contributorId":2031,"corporation":false,"usgs":true,"family":"Eganhouse","given":"Robert P.","email":"eganhous@usgs.gov","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":779431,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bekins, Barbara A. 0000-0002-1411-6018 babekins@usgs.gov","orcid":"https://orcid.org/0000-0002-1411-6018","contributorId":1348,"corporation":false,"usgs":true,"family":"Bekins","given":"Barbara","email":"babekins@usgs.gov","middleInitial":"A.","affiliations":[{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":779432,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Delin, Geoffrey N. 0000-0001-7991-6158 delin@usgs.gov","orcid":"https://orcid.org/0000-0001-7991-6158","contributorId":2610,"corporation":false,"usgs":true,"family":"Delin","given":"Geoffrey","email":"delin@usgs.gov","middleInitial":"N.","affiliations":[{"id":5063,"text":"Central Water Science Field Team","active":true,"usgs":true}],"preferred":true,"id":779433,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70035675,"text":"70035675 - 2011 - Sensitivity of Pliocene ice sheets to orbital forcing","interactions":[],"lastModifiedDate":"2013-03-13T19:17:23","indexId":"70035675","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2996,"text":"Palaeogeography, Palaeoclimatology, Palaeoecology","printIssn":"0031-0182","active":true,"publicationSubtype":{"id":10}},"title":"Sensitivity of Pliocene ice sheets to orbital forcing","docAbstract":"The stability of the Earth's major ice sheets is a critical uncertainty in predictions of future climate and sea level change. One method of investigating the behaviour of the Greenland and the Antarctic ice sheets in a warmer-than-modern climate is to look back at past warm periods of Earth history, for example the Pliocene. This paper presents climate and ice sheet modelling results for the mid-Pliocene warm period (mPWP; 3.3 to 3.0 million years ago), which has been identified as a key interval for understanding warmer-than-modern climates (Jansen et al., 2007). Using boundary conditions supplied by the United States Geological Survey PRISM Group (Pliocene Research, Interpretation and Synoptic Mapping), the Hadley Centre coupled ocean–atmosphere climate model (HadCM3) and the British Antarctic Survey Ice Sheet Model (BASISM), we show large reductions in the Greenland and East Antarctic Ice Sheets (GrIS and EAIS) compared to modern in standard mPWP experiments. We also present the first results illustrating the variability of the ice sheets due to realistic orbital forcing during the mid-Pliocene. While GrIS volumes are lower than modern under even the most extreme (cold) mid-Pliocene orbit (losing at least 35% of its ice mass), the EAIS can both grow and shrink, losing up to 20% or gaining up to 10% of its present-day volume. The changes in ice sheet volume incurred by altering orbital forcing alone means that global sea level can vary by more than 25 m during the mid-Pliocene. However, we have also shown that the response of the ice sheets to mPWP orbital hemispheric forcing can be in anti-phase, whereby the greatest reductions in EAIS volume are concurrent with the smallest reductions of the GrIS. If this anti-phase relationship is in operation throughout the mPWP, then the total eustatic sea level response would be dampened compared to the ice sheet fluctuations that are theoretically possible. This suggests that maximum eustatic sea level rise does not correspond to orbital maxima, but occurs at times where the anti-phasing of Northern and Southern Hemisphere ice sheet retreat is minimised.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Palaeogeography, Palaeoclimatology, Palaeoecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/j.palaeo.2011.03.030","issn":"00310182","usgsCitation":"Dolan, A., Haywood, A., Hill, D., Dowsett, H., Hunter, S., Lunt, D., and Pickering, S., 2011, Sensitivity of Pliocene ice sheets to orbital forcing: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 309, no. 1-2, p. 98-110, https://doi.org/10.1016/j.palaeo.2011.03.030.","productDescription":"13 p.","startPage":"98","endPage":"110","costCenters":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"links":[{"id":216343,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.palaeo.2011.03.030"},{"id":244207,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"309","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d28e4b08c986b3182a3","contributors":{"authors":[{"text":"Dolan, A.M.","contributorId":40818,"corporation":false,"usgs":true,"family":"Dolan","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":451811,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haywood, A.M.","contributorId":101050,"corporation":false,"usgs":true,"family":"Haywood","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":451813,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hill, D.J.","contributorId":102291,"corporation":false,"usgs":true,"family":"Hill","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":451814,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dowsett, H.J. 0000-0003-1983-7524","orcid":"https://orcid.org/0000-0003-1983-7524","contributorId":87924,"corporation":false,"usgs":true,"family":"Dowsett","given":"H.J.","affiliations":[],"preferred":false,"id":451812,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hunter, S.J.","contributorId":27704,"corporation":false,"usgs":true,"family":"Hunter","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":451810,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lunt, D.J.","contributorId":105127,"corporation":false,"usgs":true,"family":"Lunt","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":451815,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Pickering, S.J.","contributorId":6283,"corporation":false,"usgs":true,"family":"Pickering","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":451809,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70035891,"text":"70035891 - 2011 - Remote sensing of vegetation pattern and condition to monitor changes in everglades biogeochemistry","interactions":[],"lastModifiedDate":"2021-02-08T20:40:46.465391","indexId":"70035891","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1345,"text":"Critical Reviews in Environmental Science and Technology","active":true,"publicationSubtype":{"id":10}},"title":"Remote sensing of vegetation pattern and condition to monitor changes in everglades biogeochemistry","docAbstract":"<p><span>Ground-based studies of biogeochemistry and vegetation patterning yield process understanding, but the amount of information gained by ground-based studies can be greatly enhanced by efficient, synoptic, and temporally resolute monitoring afforded by remote sensing. The variety of presently available Everglades vegetation maps reflects both the wide range of application requirements and the need to balance cost and capability. More effort needs to be applied to documenting and understanding vegetation distribution and condition as indicators of biogeochemistry and contamination. Ground-based and remote sensing studies should be modified to maximize their synergy and utility for adaptive management.</span></p>","language":"English","publisher":"Taylor & Francis Online","doi":"10.1080/10643389.2010.530924","issn":"10643389","usgsCitation":"Jones, J., 2011, Remote sensing of vegetation pattern and condition to monitor changes in everglades biogeochemistry: Critical Reviews in Environmental Science and Technology, v. 41, no. SUPPL. 1, p. 64-91, https://doi.org/10.1080/10643389.2010.530924.","productDescription":"28 p.","startPage":"64","endPage":"91","costCenters":[{"id":242,"text":"Eastern Geographic Science Center","active":true,"usgs":true}],"links":[{"id":244121,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216260,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1080/10643389.2010.530924"}],"country":"United States","state":"Florida","otherGeospatial":"Everglades","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -81.73278808593749,\n              26.03210611734895\n            ],\n            [\n              -81.3922119140625,\n              25.76526690492097\n            ],\n            [\n              -81.199951171875,\n              25.3688458240828\n            ],\n            [\n              -81.221923828125,\n              25.175116531621764\n            ],\n            [\n              -80.9967041015625,\n              25.06569718553588\n            ],\n            [\n              -80.562744140625,\n              25.17014505150313\n            ],\n            [\n              -80.39794921875,\n              25.37380917154398\n            ],\n            [\n              -80.4034423828125,\n              26.07652055985697\n            ],\n            [\n              -80.145263671875,\n              26.391869671769022\n            ],\n            [\n              -80.233154296875,\n              26.701452590314368\n            ],\n            [\n              -80.4638671875,\n              26.745610382199022\n            ],\n            [\n              -80.540771484375,\n              26.49024045886963\n            ],\n            [\n              -80.8319091796875,\n              26.539394329017032\n            ],\n            [\n              -81.024169921875,\n              26.500072915744372\n            ],\n            [\n              -81.1395263671875,\n              26.318036522949075\n            ],\n            [\n              -81.5185546875,\n              26.298339726417737\n            ],\n            [\n              -81.73278808593749,\n              26.03210611734895\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"41","issue":"SUPPL. 1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa70ce4b0c8380cd851c7","contributors":{"authors":[{"text":"Jones, John W. 0000-0001-6117-3691 jwjones@usgs.gov","orcid":"https://orcid.org/0000-0001-6117-3691","contributorId":2220,"corporation":false,"usgs":true,"family":"Jones","given":"John","email":"jwjones@usgs.gov","middleInitial":"W.","affiliations":[{"id":37786,"text":"WMA - Observing Systems Division","active":true,"usgs":true},{"id":242,"text":"Eastern Geographic Science Center","active":true,"usgs":true}],"preferred":true,"id":452966,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70035979,"text":"70035979 - 2011 - Derivation of S and Pb in phanerozoic intrusion-related metal deposits from neoproterozoic sedimentary pyrite, Great Basin, United States","interactions":[],"lastModifiedDate":"2017-12-01T10:10:42","indexId":"70035979","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Derivation of S and Pb in phanerozoic intrusion-related metal deposits from neoproterozoic sedimentary pyrite, Great Basin, United States","docAbstract":"<p>The thick (≤8 km), regionally extensive section of Neoproterozoic siliciclastic strata (terrigenous detrital succession, TDS) in the central and eastern Great Basin contains sedimentary pyrite characterized by mostly high<span>&nbsp;</span><i>δ</i><sup>34</sup>S values (−11.6 to 40.8‰, &gt;70% exceed 10‰; 51 analyses) derived from reduction of seawater sulfate, and by markedly radiogenic Pb isotopes (<sup>207</sup>Pb/<sup>204</sup>Pb &gt;19.2; 15 analyses) acquired from clastic detritus eroded from Precambrian cratonal rocks to the east-southeast. In the overlying Paleozoic section, Pb-Zn-Cu-Ag-Au deposits associated with Jurassic, Cretaceous, and Tertiary granitic intrusions (intrusion-related metal deposits) contain galena and other sulfide minerals with S and Pb isotope compositions similar to those of TDS sedimentary pyrite, consistent with derivation of deposit S and Pb from TDS pyrite. Minor element abundances in TDS pyrite (e.g., Pb, Zn, Cu, Ag, and Au) compared to sedimentary and hydrothermal pyrite elsewhere are not noticeably elevated, implying that enrichment in source minerals is not a precondition for intrusion-related metal deposits.</p><p>Three mechanisms for transferring components of TDS sedimentary pyrite to intrusion-related metal deposits are qualitatively evaluated. One mechanism involves (1) decomposition of TDS pyrite in thermal aureoles of intruding magmas, and (2) aqueous transport and precipitation in thermal or fluid mixing gradients of isotopically heavy S, radiogenic Pb, and possibly other sedimentary pyrite and detrital mineral components, as sulfide minerals in intrusion-related metal deposits. A second mechanism invokes mixing and S isotope exchange in thermal aureoles of Pb and S exsolved from magma and derived from decomposition of sedimentary pyrite. A third mechanism entails melting of TDS strata or assimilation of TDS strata by crustal or mantle magmas. TDS-derived or assimilated magmas ascend, decompress, and exsolve a mixture of TDS volatiles, including isotopically heavy S and radiogenic Pb from sedimentary pyrite, and volatiles acquired from deeper crustal or mantle sources.</p><p>In the central and eastern Great Basin, the wide distribution and high density of small to mid-sized vein, replacement, and skarn intrusion-related metal deposits in lower Paleozoic rocks that contain TDS sedimentary pyrite S and Pb reflect (1) prolific Jurassic, Cretaceous, and Tertiary magmatism, (2) a regional, substrate reservoir of S and Pb in permeable and homogeneous siliciclastic strata, and (3) relatively small scale concentration of substrate and magmatic components. Large intrusion-related metal deposits in the central and eastern Great Basin acquired S and most Pb from thicker lithospheric sections.</p>","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/econgeo.106.5.883","issn":"03610128","usgsCitation":"Vikre, P., Poulson, S., and Koenig, A.E., 2011, Derivation of S and Pb in phanerozoic intrusion-related metal deposits from neoproterozoic sedimentary pyrite, Great Basin, United States: Economic Geology, v. 106, no. 5, p. 883-912, https://doi.org/10.2113/econgeo.106.5.883.","productDescription":"30 p.","startPage":"883","endPage":"912","numberOfPages":"30","ipdsId":"IP-021544","costCenters":[{"id":662,"text":"Western Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"links":[{"id":244125,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216264,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/econgeo.106.5.883"}],"volume":"106","issue":"5","noUsgsAuthors":false,"publicationDate":"2011-07-22","publicationStatus":"PW","scienceBaseUri":"5059fedce4b0c8380cd4ef6d","contributors":{"authors":[{"text":"Vikre, Peter G. pvikre@usgs.gov","contributorId":1800,"corporation":false,"usgs":true,"family":"Vikre","given":"Peter G.","email":"pvikre@usgs.gov","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":false,"id":453438,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Poulson, S.R.","contributorId":98859,"corporation":false,"usgs":true,"family":"Poulson","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":453439,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Koenig, Alan E. 0000-0002-5230-0924 akoenig@usgs.gov","orcid":"https://orcid.org/0000-0002-5230-0924","contributorId":1564,"corporation":false,"usgs":true,"family":"Koenig","given":"Alan","email":"akoenig@usgs.gov","middleInitial":"E.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":453437,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70035060,"text":"70035060 - 2011 - Diurnal trends in methylmercury concentration in a wetland adjacent to Great Salt Lake, Utah, USA","interactions":[],"lastModifiedDate":"2020-01-11T10:49:18","indexId":"70035060","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1213,"text":"Chemical Geology","active":true,"publicationSubtype":{"id":10}},"title":"Diurnal trends in methylmercury concentration in a wetland adjacent to Great Salt Lake, Utah, USA","docAbstract":"<div id=\"aep-abstract-id19\" class=\"abstract author\"><div id=\"aep-abstract-sec-id20\"><p id=\"sp0045\">A 24-h field experiment was conducted during July 2008 at a wetland on the eastern shore of Great Salt Lake (GSL) to assess the diurnal cycling of methylmercury (MeHg). Dissolved (&lt;&nbsp;0.45&nbsp;μm) MeHg showed a strong diurnal variation with consistently decreasing concentrations during daylight periods and increasing concentrations during non-daylight periods. The proportion of MeHg relative to total Hg in the water column consistently decreased with increasing sunlight duration, indicative of photodegradation. During the field experiment, measured MeHg photodegradation rates ranged from 0.02 to 0.06&nbsp;ng&nbsp;L<sup>−&nbsp;1</sup>&nbsp;h<sup>−&nbsp;1</sup>. Convective overturn of the water column driven by nighttime cooling of the water surface was hypothesized as the likely mechanism to replace the MeHg in the water column lost via photodegradation processes. A hydrodynamic model of the wetland successfully simulated convective overturn of the water column during the field experiment. Study results indicate that daytime monitoring of selected wetlands surrounding GSL may significantly underestimate the MeHg content in the water column. Wetland managers should consider practices that maximize the photodegradation of MeHg during daylight periods.</p></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/j.chemgeo.2011.02.005","issn":"00092541","usgsCitation":"Naftz, D.L., Cederberg, J., Krabbenhoft, D., Beisner, K.R., Whitehead, J., and Gardberg, J., 2011, Diurnal trends in methylmercury concentration in a wetland adjacent to Great Salt Lake, Utah, USA: Chemical Geology, v. 283, no. 1-2, p. 78-86, https://doi.org/10.1016/j.chemgeo.2011.02.005.","productDescription":"9 p.","startPage":"78","endPage":"86","numberOfPages":"9","costCenters":[{"id":381,"text":"Mercury Research Laboratory","active":false,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":243347,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Utah","otherGeospatial":"Great Salt Lake","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -113.236083984375,\n              40.622291783092706\n            ],\n            [\n              -111.86279296875,\n              40.622291783092706\n            ],\n            [\n              -111.86279296875,\n              41.763117447005875\n            ],\n            [\n              -113.236083984375,\n              41.763117447005875\n            ],\n            [\n              -113.236083984375,\n              40.622291783092706\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"283","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0342e4b0c8380cd503bb","contributors":{"authors":[{"text":"Naftz, D. L.","contributorId":40624,"corporation":false,"usgs":true,"family":"Naftz","given":"D.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":449085,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cederberg, J.R.","contributorId":16239,"corporation":false,"usgs":true,"family":"Cederberg","given":"J.R.","affiliations":[],"preferred":false,"id":449083,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Krabbenhoft, D. P. 0000-0003-1964-5020","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":90765,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"D. P.","affiliations":[],"preferred":false,"id":449088,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Beisner, K. R. 0000-0002-2077-6899","orcid":"https://orcid.org/0000-0002-2077-6899","contributorId":30052,"corporation":false,"usgs":true,"family":"Beisner","given":"K.","middleInitial":"R.","affiliations":[{"id":472,"text":"New Mexico Water Science Center","active":true,"usgs":true}],"preferred":true,"id":449084,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Whitehead, J.","contributorId":54409,"corporation":false,"usgs":true,"family":"Whitehead","given":"J.","affiliations":[],"preferred":false,"id":449087,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Gardberg, J.","contributorId":42052,"corporation":false,"usgs":true,"family":"Gardberg","given":"J.","email":"","affiliations":[],"preferred":false,"id":449086,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70035754,"text":"70035754 - 2011 - Spatial and temporal trends of selected trace elements in liver tissue from polar bears (Ursus maritimus) from Alaska, Canada and Greenland","interactions":[],"lastModifiedDate":"2021-02-10T21:08:03.610029","indexId":"70035754","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2259,"text":"Journal of Environmental Monitoring","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Spatial and temporal trends of selected trace elements in liver tissue from polar bears (<i>Ursus maritimus</i>) from Alaska, Canada and Greenland","title":"Spatial and temporal trends of selected trace elements in liver tissue from polar bears (Ursus maritimus) from Alaska, Canada and Greenland","docAbstract":"<p><span>Spatial trends and comparative changes in time of selected trace elements were studied in liver tissue from polar bears from ten different subpopulation locations in Alaska, Canadian Arctic and East Greenland. For nine of the trace elements (As, Cd, Cu, Hg, Mn, Pb, Rb, Se and Zn) spatial trends were investigated in 136 specimens sampled during 2005–2008 from bears from these ten subpopulations. Concentrations of Hg, Se and As were highest in the (northern and southern) Beaufort Sea area and lowest in (western and southern) Hudson Bay area and Chukchi/Bering Sea. In contrast, concentrations of Cd showed an increasing trend from east to west. Minor or no spatial trends were observed for Cu, Mn, Rb and Zn. Spatial trends were in agreement with previous studies, possibly explained by natural phenomena. To assess temporal changes of Cd, Hg, Se and Zn concentrations during the last decades, we compared our results to previously published data. These time comparisons suggested recent Hg increase in East Greenland polar bears. This may be related to Hg emissions and/or climate-induced changes in Hg cycles or changes in the polar bear&nbsp;</span>food<span>&nbsp;web related to global warming. Also, Hg : Se molar ratio has increased in East Greenland polar bears, which suggests there may be an increased risk for Hg</span><small><sup>2+</sup></small><span>-mediated toxicity. Since the underlying reasons for spatial trends or changes in time of trace elements in the Arctic are still largely unknown, future studies should focus on the role of changing climate and trace metal emissions on geographical and temporal trends of trace elements.</span></p>","language":"English","publisher":"Royal Society of Chemistry","doi":"10.1039/c1em10088b","usgsCitation":"Routti, H., Letcher, R., Born, E.W., Branigan, M., Dietz, R., Evans, T., Fisk, A.T., Peacock, E.L., and Sonne, C., 2011, Spatial and temporal trends of selected trace elements in liver tissue from polar bears (Ursus maritimus) from Alaska, Canada and Greenland: Journal of Environmental Monitoring, v. 13, no. 8, p. 2260-2267, https://doi.org/10.1039/c1em10088b.","productDescription":"8 p.","startPage":"2260","endPage":"2267","costCenters":[],"links":[{"id":243950,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States, Canada, Greenland","state":"Alasksa","otherGeospatial":"Alaska, Canada and Greenland","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -169.45312499999997,\n              57.326521225217064\n            ],\n            [\n              -37.265625,\n              57.326521225217064\n            ],\n            [\n              -37.265625,\n              85.34532513469132\n            ],\n            [\n              -169.45312499999997,\n              85.34532513469132\n            ],\n            [\n              -169.45312499999997,\n              57.326521225217064\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"13","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b944be4b08c986b31a9ad","contributors":{"authors":[{"text":"Routti, Heli","contributorId":56879,"corporation":false,"usgs":false,"family":"Routti","given":"Heli","email":"","affiliations":[{"id":7238,"text":"Norwegian Polar Institute","active":true,"usgs":false}],"preferred":false,"id":452203,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Letcher, Robert J.","contributorId":25292,"corporation":false,"usgs":true,"family":"Letcher","given":"Robert J.","affiliations":[],"preferred":false,"id":452198,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Born, Erik W.","contributorId":8379,"corporation":false,"usgs":false,"family":"Born","given":"Erik","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":452197,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Branigan, Marsha","contributorId":55236,"corporation":false,"usgs":false,"family":"Branigan","given":"Marsha","email":"","affiliations":[{"id":33080,"text":"Environment and Natural Resources, Government of Northwest Territories, Inuvik, NT, Canada","active":true,"usgs":false}],"preferred":false,"id":452202,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Dietz, Rune","contributorId":41741,"corporation":false,"usgs":true,"family":"Dietz","given":"Rune","affiliations":[],"preferred":false,"id":452199,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Evans, Thomas J.","contributorId":174904,"corporation":false,"usgs":false,"family":"Evans","given":"Thomas J.","affiliations":[{"id":13235,"text":"U.S. Fish and Wildlife Service, Marine Mammals Management","active":true,"usgs":false}],"preferred":false,"id":452205,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Fisk, Aaron T.","contributorId":127340,"corporation":false,"usgs":false,"family":"Fisk","given":"Aaron","email":"","middleInitial":"T.","affiliations":[{"id":6778,"text":"University of Windsor, Windsor, Ontario, Canada","active":true,"usgs":false}],"preferred":false,"id":452200,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Peacock, Elizabeth L. 0000-0001-7279-0329 lpeacock@usgs.gov","orcid":"https://orcid.org/0000-0001-7279-0329","contributorId":3361,"corporation":false,"usgs":true,"family":"Peacock","given":"Elizabeth","email":"lpeacock@usgs.gov","middleInitial":"L.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":false,"id":452201,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Sonne, Christian","contributorId":28527,"corporation":false,"usgs":true,"family":"Sonne","given":"Christian","affiliations":[],"preferred":false,"id":452204,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70192763,"text":"70192763 - 2011 - Coal resources for the Chemard Lake (Naborton No. 2) coal zone of the lower Wilcox group (Paleocene), northwestern Louisiana","interactions":[],"lastModifiedDate":"2020-10-22T16:44:00.587484","indexId":"70192763","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"seriesTitle":{"id":5382,"text":"AAPG Studies in Geology","active":false,"publicationSubtype":{"id":24}},"chapter":"6","title":"Coal resources for the Chemard Lake (Naborton No. 2) coal zone of the lower Wilcox group (Paleocene), northwestern Louisiana","docAbstract":"<p><span>The lower part of the Wilcox Group of northwest Louisiana contains shallow (less than 500 ft) coal deposits that are mined for use in mine-mouth electric power-generating plants. The coal deposits, which are lignite A in apparent rank (Pierce et al., 2011), occur on the eastern part of the Sabine uplift (Figure 1). The coal zones and associated strata in the assessment area generally dip away from the axis of the Red River-Bull Bayou dome that is located in the north-central part of the Louisiana Sabine assessment area (Figure 1). This assessment area includes parts of four parishes: De Soto, Red River, Natchitoches, and Sabine (Figure 2). The assessment area was selected because of its proximity to current mining areas and the availability of stratigraphic data in the area. The assessment area is roughly 60 miles long and 15 miles wide and generally extends across the central-eastern part of the Sabine uplift in northwest Louisiana (Figure 2). More than 950 stratigraphic records from rotary and core drill holes were used to assess the coal resources of the Louisiana Sabine area. Of these, 210 are public data points and are located in or near the areas that have been permitted or proposed for surface mining (Figure 2; Appendix 1). Most of the stratigraphic data used for this assessment were provided to the U.S. Geological Survey (USGS) on a confidential basis by various coal companies for use in regional studies.</span></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Geologic assessment of coal in the Gulf of Mexico coastal plain","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"American Association of Petroleum Geologists","usgsCitation":"Warwick, P.D., Podwysocki, S.M., and Schultz, A.C., 2011, Coal resources for the Chemard Lake (Naborton No. 2) coal zone of the lower Wilcox group (Paleocene), northwestern Louisiana, chap. 6 <i>of</i> Geologic assessment of coal in the Gulf of Mexico coastal plain: AAPG Studies in Geology, v. 62, p. 109-127.","productDescription":"19 p.","startPage":"109","endPage":"127","ipdsId":"IP-020033","costCenters":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true},{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"links":[{"id":350909,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":350908,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://archives.datapages.com/data/specpubs/discovery14/data/001/001001/109_aapg-sp0010109.htm"}],"country":"United 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pwarwick@usgs.gov","orcid":"https://orcid.org/0000-0002-3152-7783","contributorId":762,"corporation":false,"usgs":true,"family":"Warwick","given":"Peter","email":"pwarwick@usgs.gov","middleInitial":"D.","affiliations":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":716852,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Podwysocki, Steven M.","contributorId":90352,"corporation":false,"usgs":true,"family":"Podwysocki","given":"Steven","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":716853,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schultz, Adam C.","contributorId":82752,"corporation":false,"usgs":true,"family":"Schultz","given":"Adam","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":716854,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70192780,"text":"70192780 - 2011 - Bibliography of the Gulf of Mexico coastal plain coal geology","interactions":[],"lastModifiedDate":"2020-10-22T17:04:19.730078","indexId":"70192780","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"seriesTitle":{"id":5382,"text":"AAPG Studies in Geology","active":false,"publicationSubtype":{"id":24}},"chapter":"19","title":"Bibliography of the Gulf of Mexico coastal plain coal geology","docAbstract":"<p>Unlike scientific literature pertaining to most other coal-bearing regions in the conterminous United States, this bibliography on the coal geology of the Gulf Coastal Plain is dominated by work from the late 20th century. Although coals of this region were mined commercially in the late 1800s and early 1900s, they were eclipsed by the production and use of oil and gas in the middle 1920s and were not mined again as a significant fuel source until the 1970s. As a result, the literature consists mainly of a relatively small number of pre-1920 contributions in state and federal reports, followed by a plethora of technical papers, symposia proceedings, field guides, theses, dissertations, and abstracts over the past 40 years.</p><p>The purpose of this chapter is to record the present work used by U.S. Geological Survey personnel preparing the Gulf Coast Coal Resource Assessment and to furnish an introduction to the larger body of sedimentary, stratigraphic, paleontologic, geochemical, hydrologic, and mining literature that exists in the region. This bibliography is an update of an earlier compilation (Tewalt et al., 1990). Despite its length, it is not exhaustive. Nor is it restricted to papers that focus solely upon coals because an understanding of these coals is rooted in the general geologic literature of the Gulf Coastal Plain.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Geologic assessment of coal in the Gulf of Mexico coastal plain","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"American Association of Petroleum Geologists","usgsCitation":"Hook, R.W., Warwick, P.D., Karlsen, A.W., and Tewalt, S.J., 2011, Bibliography of the Gulf of Mexico coastal plain coal geology, chap. 19 <i>of</i> Geologic assessment of coal in the Gulf of Mexico coastal plain: AAPG Studies in Geology, v. 62, p. 348-389.","productDescription":"42 p.","startPage":"348","endPage":"389","ipdsId":"IP-020074","costCenters":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true}],"links":[{"id":350931,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":350930,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://archives.datapages.com/data/specpubs/discovery14/data/001/001001/348_aapg-sp0010348.htm"}],"country":"United States","state":"Louisiana, Texas","otherGeospatial":"Gulf of Mexico coastal plain","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -96.7236328125,\n              29.49698759653577\n            ],\n            [\n              -92.4169921875,\n              29.49698759653577\n            ],\n            [\n              -92.4169921875,\n              32.21280106801518\n            ],\n            [\n              -96.7236328125,\n              32.21280106801518\n            ],\n            [\n              -96.7236328125,\n              29.49698759653577\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"62","publishingServiceCenter":{"id":9,"text":"Reston PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5a743587e4b0a9a2e9e25cb8","contributors":{"editors":[{"text":"Warwick, Peter D. 0000-0002-3152-7783 pwarwick@usgs.gov","orcid":"https://orcid.org/0000-0002-3152-7783","contributorId":762,"corporation":false,"usgs":true,"family":"Warwick","given":"Peter","email":"pwarwick@usgs.gov","middleInitial":"D.","affiliations":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":726475,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Karlsen, Alexander K.","contributorId":44089,"corporation":false,"usgs":false,"family":"Karlsen","given":"Alexander K.","affiliations":[],"preferred":false,"id":726476,"contributorType":{"id":2,"text":"Editors"},"rank":2},{"text":"Merrill, Matthew D. 0000-0003-3766-847X mmerrill@usgs.gov","orcid":"https://orcid.org/0000-0003-3766-847X","contributorId":2584,"corporation":false,"usgs":true,"family":"Merrill","given":"Matthew D.","email":"mmerrill@usgs.gov","affiliations":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":726477,"contributorType":{"id":2,"text":"Editors"},"rank":3},{"text":"Tewalt, Susan J. stewalt@usgs.gov","contributorId":64270,"corporation":false,"usgs":true,"family":"Tewalt","given":"Susan","email":"stewalt@usgs.gov","middleInitial":"J.","affiliations":[{"id":259,"text":"Energy Resources Science Center","active":false,"usgs":true}],"preferred":false,"id":726478,"contributorType":{"id":2,"text":"Editors"},"rank":4}],"authors":[{"text":"Hook, Robert W.","contributorId":26006,"corporation":false,"usgs":true,"family":"Hook","given":"Robert","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":716905,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Warwick, Peter D. 0000-0002-3152-7783 pwarwick@usgs.gov","orcid":"https://orcid.org/0000-0002-3152-7783","contributorId":762,"corporation":false,"usgs":true,"family":"Warwick","given":"Peter","email":"pwarwick@usgs.gov","middleInitial":"D.","affiliations":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":716906,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Karlsen, Alexander W.","contributorId":105382,"corporation":false,"usgs":true,"family":"Karlsen","given":"Alexander","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":716907,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tewalt, Susan J. stewalt@usgs.gov","contributorId":64270,"corporation":false,"usgs":true,"family":"Tewalt","given":"Susan","email":"stewalt@usgs.gov","middleInitial":"J.","affiliations":[{"id":259,"text":"Energy Resources Science Center","active":false,"usgs":true}],"preferred":false,"id":716908,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70034617,"text":"70034617 - 2011 - A Miocene river in northern Arizona and its implications for the Colorado River and Grand Canyon","interactions":[],"lastModifiedDate":"2018-11-01T14:36:44","indexId":"70034617","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1728,"text":"GSA Today","active":true,"publicationSubtype":{"id":10}},"title":"A Miocene river in northern Arizona and its implications for the Colorado River and Grand Canyon","docAbstract":"The southwesterly course of the pre–late Miocene Crooked Ridge River can be traced continuously for 48 km and discontinuously for 91 km in northern Arizona. It is visible today in inverted relief. Pebbles in the river gravel came from at least as far northeast as the San Juan Mountains. The river valley was carved out of easily eroded Jurassic and Cretaceous rocks, whose debris overloaded the river with abundant detritus, possibly steepening the gradient. After the river became inactive, the regional drainage network was rearranged twice, and the Four Corners region was lowered by erosion 1–2 km. The river provides constraints on the history of the Colorado River and Grand Canyon; its continuation into lakes in Arizona or Utah is unlikely, as is integration of the Colorado River through Grand Canyon by lake spillover. The downstream course of the river was probably across the Kaibab Arch in a valley roughly coincident with the present eastern Grand Canyon.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"GSA Today","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Geological Society of America","publisherLocation":"Boulder, CO","doi":"10.1130/G119A.1","issn":"10525173","usgsCitation":"Lucchitta, I., Holm, R.F., and Lucchitta, B.K., 2011, A Miocene river in northern Arizona and its implications for the Colorado River and Grand Canyon: GSA Today, v. 21, no. 10, p. 4-10, https://doi.org/10.1130/G119A.1.","productDescription":"7 p.","startPage":"4","endPage":"10","costCenters":[{"id":128,"text":"Arizona Water Science Center","active":true,"usgs":true},{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":215950,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G119A.1"},{"id":243787,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arizona","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -114.82,31.33 ], [ -114.82,37.0 ], [ -109.0,37.0 ], [ -109.0,31.33 ], [ -114.82,31.33 ] ] ] } } ] }","volume":"21","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e468e4b0c8380cd4663a","contributors":{"authors":[{"text":"Lucchitta, Ivo","contributorId":94291,"corporation":false,"usgs":true,"family":"Lucchitta","given":"Ivo","email":"","affiliations":[],"preferred":false,"id":446685,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Holm, Richard F.","contributorId":8009,"corporation":false,"usgs":true,"family":"Holm","given":"Richard","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":446684,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lucchitta, Baerbel K. blucchitta@usgs.gov","contributorId":3649,"corporation":false,"usgs":true,"family":"Lucchitta","given":"Baerbel","email":"blucchitta@usgs.gov","middleInitial":"K.","affiliations":[],"preferred":true,"id":446683,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70192679,"text":"70192679 - 2011 - Paleocene coal deposits of the Wilcox group, central Texas","interactions":[],"lastModifiedDate":"2020-10-22T16:16:30.22818","indexId":"70192679","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"seriesTitle":{"id":5382,"text":"AAPG Studies in Geology","active":false,"publicationSubtype":{"id":24}},"chapter":"9","title":"Paleocene coal deposits of the Wilcox group, central Texas","docAbstract":"<p>Coal deposits in the Wilcox Group of central Texas have been regarded as the richest coal resources in the Gulf Coastal Plain. Although minable coal beds appear to be less numerous and generally higher in sulfur content (1 percent average, as-received basis; table 1) than Wilcox coal deposits in the Northeast Texas and Louisiana Sabine assessment areas (0.5 and 0.6 percent sulfur, respectively; table 1), net coal thickness in coal zones in central Texas is up to 32 ft thick and more persistent along strike (up to 15 mi) at or near the surface than coals of any other Gulf Coast assessment area. The rank of the coal beds in central Texas is generally lignite (table 1), but some coal ranks as great as subbituminous C have been reported (Mukhopadhyay, 1989). The outcrop of the Wilcox Group in central Texas strikes northeast, extends for approximately 140 mi between the Trinity and Colorado Rivers, and covers parts of Bastrop, Falls, Freestone, Lee, Leon, Limestone, Milam, Navarro, Robertson, and Williamson Counties (Figure 1). Three formations, in ascending order, the Hooper, Simsboro, and Calvert Bluff, are recognized in central Texas (Figure 2). The Wilcox Group is underlain conformably by the Midway Group, a mudstone-dominated marine sequence, and is overlain and scoured locally by the Carrizo Sand, a fluvial unit at the base of the Claiborne Group.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Geologic assessment of coal in the Gulf of Mexico coastal plain","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"American Association of Petroleum Geologists","usgsCitation":"Hook, R.W., Warwick, P.D., SanFilipo, J., Schultz, A.C., Nichols, D.J., and Swanson, S.M., 2011, Paleocene coal deposits of the Wilcox group, central Texas, chap. 9 <i>of</i> Geologic assessment of coal in the Gulf of Mexico coastal plain: AAPG Studies in Geology, v. 62, p. 179-191.","productDescription":"13 p.","startPage":"179","endPage":"191","ipdsId":"IP-020038","costCenters":[{"id":241,"text":"Eastern Energy Resources Science 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,{"id":70034760,"text":"70034760 - 2011 - Sequence stratigraphy and a revised sea-level curve for the Middle Devonian of eastern North America","interactions":[],"lastModifiedDate":"2021-03-16T12:02:56.254942","indexId":"70034760","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2996,"text":"Palaeogeography, Palaeoclimatology, Palaeoecology","printIssn":"0031-0182","active":true,"publicationSubtype":{"id":10}},"title":"Sequence stratigraphy and a revised sea-level curve for the Middle Devonian of eastern North America","docAbstract":"<p><span>The well-exposed Middle Devonian rocks of the Appalachian foreland basin (Onondaga Formation; Hamilton Group, Tully Formation, and the Genesee Group of New York State) preserve one of the most detailed records of high-order sea-level oscillation cycles for this time period in the world. Detailed examination of coeval units in distal areas of the Appalachian Basin, as well as portions of the Michigan and Illinois basins, has revealed that the pattern of high-order sea-level oscillations documented in the New York–Pennsylvania section can be positively identified in all areas of eastern North America where coeval units are preserved. The persistence of the pattern of high-order sea-level cycles across such a wide geographic area suggests that these cycles are allocyclic in nature with primary control on deposition being eustatic sea-level oscillation, as opposed to autocylic controls, such as sediment supply, which would be more local in their manifestation. There is strong evidence from studies of cyclicity and spectral analysis that these cycles are also related to Milankovitch orbital variations, with the short and long-term eccentricity cycles (100</span><span>&nbsp;</span><span>kyr and 405</span><span>&nbsp;</span><span>kyr) being the dominant oscillations in many settings. Relative sea-level oscillations of tens of meters are likely and raise considerable issues about the driving mechanism, given that the Middle Devonian appears to record a greenhouse phase of Phanerozoic history. These new correlations lend strong support to a revised high-resolution sea-level oscillation curve for the Middle Devonian for the eastern portion of North America. Recognized third-order sequences are: Eif-1 lower Onondaga Formation, Eif-2: upper Onondaga and Union Springs formations; Eif–Giv: Oatka Creek Formation; Giv-1: Skaneateles, Giv-2: Ludlowville, Giv-3: lower Moscow, Giv-4: upper Moscow–lower Tully, and Giv-5: middle Tully–Geneseo formations. Thus, in contrast with the widely cited eustatic curve of Johnson et al. (1985), which recognizes just one major transgressive–regressive (T–R) cycle in the early–mid Givetian (If) prior to the major late Givetian Taghanic unconformity (IIa, upper Tully–Geneseo Shale), we recognize four T–R cycles: If (restricted), Ig, Ih, and Ii. We surmise that third-order sequences record eustatic sea-level fluctuations of tens of meters with periodicities of 0.8–2</span><span>&nbsp;</span><span>myr, while their medial-scale (fourth-order) subdivisions record lesser variations primarily of 405</span><span>&nbsp;</span><span>kyr duration (long-term eccentricity). This high-resolution record of sea-level change provides strong evidence for high-order eustatic cycles with probable Milankovitch periodicities, despite the fact that no direct evidence for Middle Devonian glacial sediments has been found to date.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.palaeo.2010.10.009","issn":"00310182","usgsCitation":"Brett, C.E., Baird, G., Bartholomew, A., DeSantis, M., and Ver Straeten, C.A., 2011, Sequence stratigraphy and a revised sea-level curve for the Middle Devonian of eastern North America: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 304, no. 1-2, p. 21-53, https://doi.org/10.1016/j.palaeo.2010.10.009.","productDescription":"33 p.","startPage":"21","endPage":"53","costCenters":[],"links":[{"id":243487,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States, Canada","state":"Wisconsin, Illinois, Michigan, Indiana, Kentucky, Tennessee, Ohio, Pennsylvania, New York","otherGeospatial":"Eastern North America","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -91.93359375,\n              45.89000815866184\n            ],\n            [\n              -90.791015625,\n              43.197167282501276\n            ],\n            [\n              -90.615234375,\n              42.48830197960227\n            ],\n            [\n              -90.439453125,\n              41.04621681452063\n            ],\n            [\n              -90.966796875,\n              40.17887331434696\n            ],\n            [\n              -89.82421875,\n              38.272688535980976\n            ],\n            [\n              -89.033203125,\n              37.16031654673677\n            ],\n            [\n              -90,\n              35.24561909420681\n            ],\n            [\n              -84.287109375,\n              35.24561909420681\n            ],\n            [\n              -82.880859375,\n              36.31512514748051\n            ],\n            [\n              -83.75976562499999,\n              37.020098201368114\n            ],\n            [\n              -82.705078125,\n              38.54816542304656\n            ],\n            [\n              -81.298828125,\n              40.04443758460856\n            ],\n            [\n              -75.673828125,\n              39.977120098439634\n            ],\n            [\n              -75.322265625,\n              41.705728515237524\n            ],\n            [\n              -73.212890625,\n              42.293564192170095\n            ],\n            [\n              -73.30078125,\n              44.77793589631623\n            ],\n            [\n              -74.8828125,\n              44.84029065139799\n            ],\n            [\n              -79.541015625,\n              44.902577996288876\n            ],\n            [\n              -82.705078125,\n              45.706179285330855\n            ],\n            [\n              -85.078125,\n              46.13417004624326\n            ],\n            [\n              -86.923828125,\n              44.96479793033101\n            ],\n            [\n              -87.71484375,\n              45.336701909968134\n            ],\n            [\n              -90.615234375,\n              46.619261036171515\n            ],\n            [\n              -91.7578125,\n              46.73986059969267\n            ],\n            [\n              -91.93359375,\n              45.89000815866184\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"304","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d4ce4b08c986b31832d","contributors":{"authors":[{"text":"Brett, Carlton E.","contributorId":85774,"corporation":false,"usgs":true,"family":"Brett","given":"Carlton","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":447462,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baird, G.C.","contributorId":59631,"corporation":false,"usgs":true,"family":"Baird","given":"G.C.","email":"","affiliations":[],"preferred":false,"id":447461,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bartholomew, A.J.","contributorId":18198,"corporation":false,"usgs":true,"family":"Bartholomew","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":447458,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"DeSantis, M.K.","contributorId":28824,"corporation":false,"usgs":true,"family":"DeSantis","given":"M.K.","email":"","affiliations":[],"preferred":false,"id":447459,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ver Straeten, C. 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