{"pageNumber":"2079","pageRowStart":"51950","pageSize":"25","recordCount":184717,"records":[{"id":70037392,"text":"70037392 - 2009 - Assessment of the UV camera sulfur dioxide retrieval for point source plumes","interactions":[],"lastModifiedDate":"2019-04-10T11:53:43","indexId":"70037392","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"Assessment of the UV camera sulfur dioxide retrieval for point source plumes","docAbstract":"Digital cameras, sensitive to specific regions of the ultra-violet (UV) spectrum, have been employed for quantifying sulfur dioxide (SO<sub>2</sub>) emissions in recent years. The instruments make use of the selective absorption of UV light by SO<sub>2</sub> molecules to determine pathlength concentration. Many monitoring advantages are gained by using this technique, but the accuracy and limitations have not been thoroughly investigated. The effect of some user-controlled parameters, including image exposure duration, the diameter of the lens aperture, the frequency of calibration cell imaging, and the use of the single or paired bandpass filters, have not yet been addressed. In order to clarify methodological consequences and quantify accuracy, laboratory and field experiments were conducted. Images were collected of calibration cells under varying observational conditions, and our conclusions provide guidance for enhanced image collection. Results indicate that the calibration cell response is reliably linear below 1500 ppm m, but that the response is significantly affected by changing light conditions. Exposure durations that produced maximum image digital numbers above 32 500 counts can reduce noise in plume images. Sulfur dioxide retrieval results from a coal-fired power plant plume were compared to direct sampling measurements and the results indicate that the accuracy of the UV camera retrieval method is within the range of current spectrometric methods. ?? 2009 Elsevier B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Volcanology and Geothermal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jvolgeores.2009.09.013","issn":"03770273","usgsCitation":"Dalton, M., Watson, I., Nadeau, P., Werner, C., Morrow, W., and Shannon, J., 2009, Assessment of the UV camera sulfur dioxide retrieval for point source plumes: Journal of Volcanology and Geothermal Research, v. 188, no. 4, p. 358-366, https://doi.org/10.1016/j.jvolgeores.2009.09.013.","productDescription":"9 p.","startPage":"358","endPage":"366","numberOfPages":"9","ipdsId":"IP-012540","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true},{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":244916,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"188","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ee60e4b0c8380cd49d1e","contributors":{"authors":[{"text":"Dalton, M.P.","contributorId":91715,"corporation":false,"usgs":true,"family":"Dalton","given":"M.P.","email":"","affiliations":[],"preferred":false,"id":460850,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Watson, I.M.","contributorId":77696,"corporation":false,"usgs":true,"family":"Watson","given":"I.M.","email":"","affiliations":[],"preferred":false,"id":460849,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nadeau, P.A.","contributorId":50758,"corporation":false,"usgs":true,"family":"Nadeau","given":"P.A.","email":"","affiliations":[],"preferred":false,"id":460846,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Werner, C.","contributorId":72917,"corporation":false,"usgs":true,"family":"Werner","given":"C.","email":"","affiliations":[],"preferred":false,"id":460848,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Morrow, W.","contributorId":61672,"corporation":false,"usgs":true,"family":"Morrow","given":"W.","email":"","affiliations":[],"preferred":false,"id":460847,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Shannon, J.M.","contributorId":98978,"corporation":false,"usgs":true,"family":"Shannon","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":460851,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70034266,"text":"70034266 - 2009 - Assigning land use to supply wells for the statistical characterization of regional groundwater quality: Correlating urban land use and VOC occurrence","interactions":[],"lastModifiedDate":"2018-09-19T08:47:04","indexId":"70034266","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Assigning land use to supply wells for the statistical characterization of regional groundwater quality: Correlating urban land use and VOC occurrence","docAbstract":"Many national and regional groundwater studies have correlated land use \"near\" a well, often using a 500 m radius circle, with water quality. However, the use of a 500 m circle may seem counterintuitive given that contributing areas are expected to extend up-gradient from wells, and not be circular in shape. The objective of this study was to evaluate if a 500 m circle is adequate for assigning land use to a well for the statistical correlation between urban land use and the occurrence of volatile organic compounds (VOCs). Land use and VOC data came from 277 supply wells in four study areas in California. Land use was computed using ten different-sized circles and wedges (250 m to 10 km in radius), and three different-sized \"searchlights\" (1-2 km in length). We define these shapes as contributing area surrogates (CASs), recognizing that a simple shape is at best a surrogate for the actual contributing area. The presence or absence of correlation between land use and the occurrence of VOCs was evaluated using Kendall's tau (??). Values of ?? were within 10% of one another for wedges and circles ranging in size from 500 m to 2 km, with correlations remaining statistically significant (p < 0.05) for all CAS sizes and shapes, suggesting that a 500 m circular CAS is adequate for assigning land use to a well. Additional evaluation indicated that urban land use is autocorrelated at distances ranging from 8 to 36 km. Thus, urban land use in a 500 m CAS is likely to be predictive of urban land use in the actual contributing area.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2009.02.056","issn":"00221694","usgsCitation":"Johnson, T., and Belitz, K., 2009, Assigning land use to supply wells for the statistical characterization of regional groundwater quality: Correlating urban land use and VOC occurrence: Journal of Hydrology, v. 370, no. 1-4, p. 100-108, https://doi.org/10.1016/j.jhydrol.2009.02.056.","startPage":"100","endPage":"108","numberOfPages":"9","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":244780,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216882,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2009.02.056"}],"volume":"370","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ee8be4b0c8380cd49dea","contributors":{"authors":[{"text":"Johnson, T.D.","contributorId":32744,"corporation":false,"usgs":true,"family":"Johnson","given":"T.D.","email":"","affiliations":[],"preferred":false,"id":444986,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Belitz, K. 0000-0003-4481-2345","orcid":"https://orcid.org/0000-0003-4481-2345","contributorId":10164,"corporation":false,"usgs":true,"family":"Belitz","given":"K.","affiliations":[],"preferred":false,"id":444985,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70037452,"text":"70037452 - 2009 - Development of a local-scale urban stream assessment method using benthic macroinvertebrates: An example from the Santa Clara Basin, California","interactions":[],"lastModifiedDate":"2012-03-12T17:22:08","indexId":"70037452","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2564,"text":"Journal of the North American Benthological Society","onlineIssn":"1937-237X","printIssn":"0887-3593","active":true,"publicationSubtype":{"id":10}},"title":"Development of a local-scale urban stream assessment method using benthic macroinvertebrates: An example from the Santa Clara Basin, California","docAbstract":"Research that explores the biological response to urbanization on a site-specific scale is necessary for management of urban basins. Recent studies have proposed a method to characterize the biological response of benthic macroinvertebrates along an urban gradient for several climatic regions in the USA. Our study demonstrates how this general framework can be refined and applied on a smaller scale to an urbanized basin, the Santa Clara Basin (surrounding San Jose, California, USA). Eighty-four sampling sites on 14 streams in the Santa Clara Basin were used for assessing local stream conditions. First, an urban index composed of human population density, road density, and urban land cover was used to determine the extent of urbanization upstream from each sampling site. Second, a multimetric biological index was developed to characterize the response of macroinvertebrate assemblages along the urban gradient. The resulting biological index included metrics from 3 ecological categories: taxonomic composition ( Ephemeroptera, Plecoptera, and Trichoptera), functional feeding group (shredder richness), and habit ( clingers). The 90<sup>th</sup>-quantile regression line was used to define the best available biological conditions along the urban gradient, which we define as the predicted biological potential. This descriptor was then used to determine the relative condition of sites throughout the basin. Hierarchical partitioning of variance revealed that several site-specific variables (dissolved O<sub>2</sub> and temperature) were significantly related to a site's deviation from its predicted biological potential. Spatial analysis of each site's deviation from its biological potential indicated geographic heterogeneity in the distribution of impaired sites. The presence and operation of local dams optimize water use, but modify natural flow regimes, which in turn influence stream habitat, dissolved O<sub>2</sub>, and temperature. Current dissolved O<sub>2</sub> and temperature regimes deviate from natural conditions and appear to affect benthic macroinvertebrate assemblages. The assessment methods presented in our study provide finer-scale assessment tools for managers in urban basins. ?? North American Benthological Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the North American Benthological Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1899/08-159.1","issn":"08873593","usgsCitation":"Carter, J., Purcell, A., Fend, S., and Resh, V., 2009, Development of a local-scale urban stream assessment method using benthic macroinvertebrates: An example from the Santa Clara Basin, California: Journal of the North American Benthological Society, v. 28, no. 4, p. 1007-1021, https://doi.org/10.1899/08-159.1.","startPage":"1007","endPage":"1021","numberOfPages":"15","costCenters":[],"links":[{"id":217413,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1899/08-159.1"},{"id":245359,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"28","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a003ce4b0c8380cd4f664","contributors":{"authors":[{"text":"Carter, J.L.","contributorId":26030,"corporation":false,"usgs":true,"family":"Carter","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":461118,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Purcell, A.H.","contributorId":47191,"corporation":false,"usgs":true,"family":"Purcell","given":"A.H.","email":"","affiliations":[],"preferred":false,"id":461119,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fend, S.V. 0000-0002-4638-6602","orcid":"https://orcid.org/0000-0002-4638-6602","contributorId":99702,"corporation":false,"usgs":true,"family":"Fend","given":"S.V.","affiliations":[],"preferred":false,"id":461121,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Resh, V.H.","contributorId":64876,"corporation":false,"usgs":true,"family":"Resh","given":"V.H.","affiliations":[],"preferred":false,"id":461120,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70037465,"text":"70037465 - 2009 - Evolution and preservation potential of fluvial and transgressive deposits on the Louisiana inner shelf: Understanding depositional processes to support coastal management","interactions":[],"lastModifiedDate":"2023-11-29T01:15:19.492407","indexId":"70037465","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1742,"text":"Geo-Marine Letters","active":true,"publicationSubtype":{"id":10}},"title":"Evolution and preservation potential of fluvial and transgressive deposits on the Louisiana inner shelf: Understanding depositional processes to support coastal management","docAbstract":"<div id=\"Abs1-section\" class=\"c-article-section\"><div id=\"Abs1-content\" class=\"c-article-section__content\"><p>The barrier-island systems of the Mississippi River Delta plain are currently undergoing some of the highest rates of shoreline retreat in North America (~20 m/year). Effective management of this coastal area requires an understanding of the processes involved in shoreline erosion and measures that can be enacted to reduce loss. The dominant stratigraphy of the delta plain is fluvial mud (silts and clays), delivered in suspension via a series of shallow-water delta lobes that prograded across the shelf throughout the Holocene. Abandonment of a delta lobe through avulsion leads to rapid land subsidence through compaction within the muddy framework. As the deltaic headland subsides below sea level, the marine environment transgresses the bays and wetlands, reworking the available sands into transgressive barrier shorelines. This natural process is further complicated by numerous factors: (1) global sea-level rise; (2) reduced sediment load within the Mississippi River; (3) diversion of the sediment load away from the barrier shorelines to the deep shelf; (4) storm-induced erosion; and (5) human alteration of the littoral process through the construction of hardened shorelines, canals, and other activities. This suite of factors has led to the deterioration of the barrier-island systems that protect interior wetlands and human infrastructure from normal wave activity and periodic storm impact. Interior wetland loss results in an increased tidal prism and inlet cross-sectional areas, and expanding ebb-tidal deltas, which removes sand from the littoral processes through diversion and sequestration. Shoreface erosion of the deltaic headlands does not provide sufficient sand to balance the loss, resulting in thinning and dislocation of the islands. Abatement measures include replenishing lost sediment with similar material, excavated from discrete sandy deposits within the muddy delta plain. These sand bodies were deposited by the same cyclical processes that formed the barrier islands, and understanding these processes is necessary to characterize their location, extent, and resource potential. In this paper we demonstrate the dominant fluvial and marine-transgressive depositional processes that occur on the inner shelf, and identify the preservation and resource potential of fluvio-deltaic deposits for coastal management in Louisiana.</p></div></div>","language":"English","publisher":"Springer","doi":"10.1007/s00367-009-0164-4","issn":"02760460","usgsCitation":"Flocks, J., Miner, M., Twichell, D., Lavoie, D.L., and Kindinger, J., 2009, Evolution and preservation potential of fluvial and transgressive deposits on the Louisiana inner shelf: Understanding depositional processes to support coastal management: Geo-Marine Letters, v. 29, no. 6, p. 359-378, https://doi.org/10.1007/s00367-009-0164-4.","productDescription":"20 p.","startPage":"359","endPage":"378","numberOfPages":"20","costCenters":[],"links":[{"id":244918,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"29","issue":"6","noUsgsAuthors":false,"publicationDate":"2009-09-30","publicationStatus":"PW","scienceBaseUri":"505a0d77e4b0c8380cd5302e","contributors":{"authors":[{"text":"Flocks, J.","contributorId":36724,"corporation":false,"usgs":true,"family":"Flocks","given":"J.","affiliations":[],"preferred":false,"id":461198,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Miner, M.D.","contributorId":56069,"corporation":false,"usgs":true,"family":"Miner","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":461200,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Twichell, D.C.","contributorId":84304,"corporation":false,"usgs":true,"family":"Twichell","given":"D.C.","affiliations":[],"preferred":false,"id":461202,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lavoie, D. L.","contributorId":46640,"corporation":false,"usgs":true,"family":"Lavoie","given":"D.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":461199,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kindinger, J.","contributorId":68514,"corporation":false,"usgs":true,"family":"Kindinger","given":"J.","affiliations":[],"preferred":false,"id":461201,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70037134,"text":"70037134 - 2009 - Comparison of humus and till as prospecting material in areas of thick overburden and multiple ice-flow events: An example from northeastern New Brunswick","interactions":[],"lastModifiedDate":"2012-03-12T17:22:10","indexId":"70037134","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2302,"text":"Journal of Geochemical Exploration","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of humus and till as prospecting material in areas of thick overburden and multiple ice-flow events: An example from northeastern New Brunswick","docAbstract":"Thirty-nine elements in humus and till matrix were compared at 109 sites overlying Ag-As-Cu-Mo-Pb-Zn mineralized occurrences in northeastern New Brunswick to assess humus for anomaly identification. Humus element concentrations were not consistently correlative with maximum or minimum concentrations found in the underlying till or bedrock. The humus demonstrated significantly higher mean elemental concentrations than the till for six specific elements: 9 times greater for Mn, 6 times greater for Cd, 5 times greater for Ag and Pb, 3 times greater for Hg, and double the concentration of Zn. Spatial dispersal patterns for these elements were much larger for humus content than that exhibited by the till matrix analysis, but did not delineate a point source. For elements in till, the highest concentrations were commonly found directly overlying the underlying mineralized bedrock source or within one km down-glacier of the source. The complexity of the humus geochemical patterns is attributed to the effects of post-glacial biogenic, down-slope hydrodynamic and solifluction modification of dispersed mineralization in the underlying till, and the greater capacity of humus to adsorb cations and form complexes with some elements, relative to the till matrix. Humus sampling in areas of glaciated terrain is considered to be mostly valuable for reconnaissance exploration as elements can be spatially dispersed over a much larger area than that found in the till or underlying bedrock. ?? 2009 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geochemical Exploration","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.gexplo.2009.08.002","issn":"03756742","usgsCitation":"Broster, B.E., Dickson, M., and Parkhill, M., 2009, Comparison of humus and till as prospecting material in areas of thick overburden and multiple ice-flow events: An example from northeastern New Brunswick: Journal of Geochemical Exploration, v. 103, no. 2-3, p. 115-132, https://doi.org/10.1016/j.gexplo.2009.08.002.","startPage":"115","endPage":"132","numberOfPages":"18","costCenters":[],"links":[{"id":217337,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.gexplo.2009.08.002"},{"id":245279,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"103","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f86ae4b0c8380cd4d0b4","contributors":{"authors":[{"text":"Broster, Bruce E.","contributorId":85441,"corporation":false,"usgs":true,"family":"Broster","given":"Bruce","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":459539,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dickson, M.L.","contributorId":25737,"corporation":false,"usgs":true,"family":"Dickson","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":459537,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Parkhill, M.A.","contributorId":57247,"corporation":false,"usgs":true,"family":"Parkhill","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":459538,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70037282,"text":"70037282 - 2009 - Instrumental record of debris flow initiation during natural rainfall: Implications for modeling slope stability","interactions":[],"lastModifiedDate":"2020-11-24T22:29:48.316269","indexId":"70037282","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2318,"text":"Journal of Geophysical Research F: Earth Surface","active":true,"publicationSubtype":{"id":10}},"title":"Instrumental record of debris flow initiation during natural rainfall: Implications for modeling slope stability","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span class=\"paraNumber\"><span></span></span></span><span>The middle of a hillslope hollow in the Oregon Coast Range failed and mobilized as a debris flow during heavy rainfall in November 1996. Automated pressure transducers recorded high spatial variability of pore water pressure within the area that mobilized as a debris flow, which initiated where local upward flow from bedrock developed into overlying colluvium. Postfailure observations of the bedrock surface exposed in the debris flow scar reveal a strong spatial correspondence between elevated piezometric response and water discharging from bedrock fractures. Measurements of apparent root cohesion on the basal (</span><i>C</i><sub><i>b</i></sub><span>) and lateral (</span><i>C</i><sub><i>l</i></sub><span>) scarp demonstrate substantial local variability, with areally weighted values of&nbsp;</span><i>C</i><sub><i>b</i></sub><span>&nbsp;= 0.1 and&nbsp;</span><i>C</i><sub><i>l</i></sub><span>&nbsp;= 4.6 kPa. Using measured soil properties and basal root strength, the widely used infinite slope model, employed assuming slope parallel groundwater flow, provides a poor prediction of hydrologic conditions at failure. In contrast, a model including lateral root strength (but neglecting lateral frictional strength) gave a predicted critical value of relative soil saturation that fell within the range defined by the arithmetic and geometric mean values at the time of failure. The 3‐D slope stability model CLARA‐W, used with locally observed pore water pressure, predicted small areas with lower factors of safety within the overall slide mass at sites consistent with field observations of where the failure initiated. This highly variable and localized nature of small areas of high pore pressure that can trigger slope failure means, however, that substantial uncertainty appears inevitable for estimating hydrologic conditions within incipient debris flows under natural conditions.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2008JF001078","usgsCitation":"Montgomery, D.R., Schmidt, K., Dietrich, W.E., and McKean, J., 2009, Instrumental record of debris flow initiation during natural rainfall: Implications for modeling slope stability: Journal of Geophysical Research F: Earth Surface, v. 114, no. F1, F01031, 16 p., https://doi.org/10.1029/2008JF001078.","productDescription":"F01031, 16 p.","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":476367,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2008jf001078","text":"Publisher Index Page"},{"id":245189,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oregon","otherGeospatial":"Mettman Ridge","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -124.47509765625,\n              43.17313537107136\n            ],\n            [\n              -123.914794921875,\n              43.17313537107136\n            ],\n            [\n              -123.914794921875,\n              43.691707903073805\n            ],\n            [\n              -124.47509765625,\n              43.691707903073805\n            ],\n            [\n              -124.47509765625,\n              43.17313537107136\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"114","issue":"F1","noUsgsAuthors":false,"publicationDate":"2009-03-12","publicationStatus":"PW","scienceBaseUri":"505a3c46e4b0c8380cd62bf0","contributors":{"authors":[{"text":"Montgomery, D. R.","contributorId":41582,"corporation":false,"usgs":false,"family":"Montgomery","given":"D.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":460260,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schmidt, K. M. 0000-0003-2365-8035","orcid":"https://orcid.org/0000-0003-2365-8035","contributorId":59830,"corporation":false,"usgs":true,"family":"Schmidt","given":"K. M.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":false,"id":460262,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dietrich, W. E.","contributorId":47538,"corporation":false,"usgs":false,"family":"Dietrich","given":"W.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":460261,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"McKean, J.","contributorId":60054,"corporation":false,"usgs":true,"family":"McKean","given":"J.","affiliations":[],"preferred":false,"id":460263,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70189184,"text":"70189184 - 2009 - Sensitivity analysis, calibration, and testing of a distributed hydrological model using error‐based weighting and one objective function","interactions":[],"lastModifiedDate":"2018-04-03T11:20:23","indexId":"70189184","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Sensitivity analysis, calibration, and testing of a distributed hydrological model using error‐based weighting and one objective function","docAbstract":"<p><span>We evaluate the utility of three interrelated means of using data to calibrate the fully distributed rainfall‐runoff model TOPKAPI as applied to the Maggia Valley drainage area in Switzerland. The use of error‐based weighting of observation and prior information data, local sensitivity analysis, and single‐objective function nonlinear regression provides quantitative evaluation of sensitivity of the 35 model parameters to the data, identification of data types most important to the calibration, and identification of correlations among parameters that contribute to nonuniqueness. Sensitivity analysis required only 71 model runs, and regression required about 50 model runs. The approach presented appears to be ideal for evaluation of models with long run times or as a preliminary step to more computationally demanding methods. The statistics used include composite scaled sensitivities, parameter correlation coefficients, leverage, Cook's D, and DFBETAS. Tests suggest predictive ability of the calibrated model typical of hydrologic models.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2008WR007255","usgsCitation":"Foglia, L., Hill, M.C., Mehl, S.W., and Burlando, P., 2009, Sensitivity analysis, calibration, and testing of a distributed hydrological model using error‐based weighting and one objective function: Water Resources Research, v. 45, no. 6, Article W06427; 18 p., https://doi.org/10.1029/2008WR007255.","productDescription":"Article W06427; 18 p.","ipdsId":"IP-011230","costCenters":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"links":[{"id":343431,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"6","publishingServiceCenter":{"id":2,"text":"Denver PSC"},"noUsgsAuthors":false,"publicationDate":"2009-06-24","publicationStatus":"PW","scienceBaseUri":"595f4c49e4b0d1f9f057e395","contributors":{"authors":[{"text":"Foglia, L.","contributorId":6251,"corporation":false,"usgs":true,"family":"Foglia","given":"L.","affiliations":[],"preferred":false,"id":703397,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hill, Mary C. mchill@usgs.gov","contributorId":974,"corporation":false,"usgs":true,"family":"Hill","given":"Mary","email":"mchill@usgs.gov","middleInitial":"C.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":703395,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mehl, Steffen W. swmehl@usgs.gov","contributorId":975,"corporation":false,"usgs":true,"family":"Mehl","given":"Steffen","email":"swmehl@usgs.gov","middleInitial":"W.","affiliations":[],"preferred":true,"id":703396,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Burlando, P.","contributorId":29209,"corporation":false,"usgs":true,"family":"Burlando","given":"P.","affiliations":[],"preferred":false,"id":703398,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70037306,"text":"70037306 - 2009 - Structural and geochemical characteristics of faulted sediments and inferences on the role of water in deformatiion, Rio Grande Rift, New Mexico","interactions":[],"lastModifiedDate":"2017-09-26T09:57:01","indexId":"70037306","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Structural and geochemical characteristics of faulted sediments and inferences on the role of water in deformatiion, Rio Grande Rift, New Mexico","docAbstract":"The San Ysidro fault is a spectacularly exposed normal fault located in the northwestern Albuquerque Basin of the Rio Grande Rift. This intrabasin fault is representative of many faults that formed in poorly lithified sediments throughout the rift. The fault is exposed over nearly 10 km and accommodates nearly 700 m of dip slip in subhorizontal, siliciclastic sediments. The extent of the exposure facilitates study of along-strike variations in deformation mechanisms, archi tecture, geochemistry, and permeability. The fault is composed of structural and hydrogeologic components that include a clay-rich fault core, a calcite-cemented mixed zone, and a poorly developed damage zone primarily consisting of deformation bands. Structural textures suggest that initial deformation in the fault occurred at low temperature and pressure, was within the paleosaturated zone of the evolving Rio Grande Rift, and was dominated by particulate flow. Little geochemical change is apparent across the fault zone other than due to secondary processes. The lack of fault-related geochemical change is interpreted to reflect the fundamental nature of water-saturated, particulate fl ow. Early mechanical entrainment of low-permeability clays into the fault core likely caused damming of groundwater flow on the up-gradient, footwall side of the fault. This may have caused a pressure gradient and flow of calcite-saturated waters in higher-permeability, fault-entrained siliciclastic sediments, ultimately promoting their cementation by sparry calcite. Once developed, the cemented and clay-rich fault has likely been, and continues to be, a partial barrier to cross-fault groundwater flow, as suggested by petrophysical measurements. Aeromagnetic data indicate that there may be many more unmapped faults with similar lengths to the San Ysidro fault buried within Rio Grande basins. If these buried faults formed by the same processes that formed the San Ysidro fault and have persistent low-permeability cores and cemented mixed zones, they could compartmentalize the basin-fill aquifers more than is currently realized, particularly if pumping stresses continue to increase in response to population growth. ?? 2009 Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geological Society of America Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/B26164.1","issn":"00167606","usgsCitation":"Caine, J.S., and Minor, S., 2009, Structural and geochemical characteristics of faulted sediments and inferences on the role of water in deformatiion, Rio Grande Rift, New Mexico: Geological Society of America Bulletin, v. 121, no. 9-10, p. 1325-1340, https://doi.org/10.1130/B26164.1.","startPage":"1325","endPage":"1340","numberOfPages":"16","costCenters":[],"links":[{"id":245066,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":217147,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/B26164.1"}],"volume":"121","issue":"9-10","noUsgsAuthors":false,"publicationDate":"2009-07-21","publicationStatus":"PW","scienceBaseUri":"505b9bc5e4b08c986b31d09d","contributors":{"authors":[{"text":"Caine, Jonathan S. 0000-0002-7269-6989 jscaine@usgs.gov","orcid":"https://orcid.org/0000-0002-7269-6989","contributorId":1272,"corporation":false,"usgs":true,"family":"Caine","given":"Jonathan","email":"jscaine@usgs.gov","middleInitial":"S.","affiliations":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"preferred":false,"id":460371,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Minor, S.A.","contributorId":65047,"corporation":false,"usgs":true,"family":"Minor","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":460370,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70037364,"text":"70037364 - 2009 - A method for assigning species into groups based on generalized Mahalanobis distance between habitat model coefficients","interactions":[],"lastModifiedDate":"2012-03-12T17:22:09","indexId":"70037364","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1573,"text":"Environmental and Ecological Statistics","active":true,"publicationSubtype":{"id":10}},"title":"A method for assigning species into groups based on generalized Mahalanobis distance between habitat model coefficients","docAbstract":"Habitat association models are commonly developed for individual animal species using generalized linear modeling methods such as logistic regression. We considered the issue of grouping species based on their habitat use so that management decisions can be based on sets of species rather than individual species. This research was motivated by a study of western landbirds in northern Idaho forests. The method we examined was to separately fit models to each species and to use a generalized Mahalanobis distance between coefficient vectors to create a distance matrix among species. Clustering methods were used to group species from the distance matrix, and multidimensional scaling methods were used to visualize the relations among species groups. Methods were also discussed for evaluating the sensitivity of the conclusions because of outliers or influential data points. We illustrate these methods with data from the landbird study conducted in northern Idaho. Simulation results are presented to compare the success of this method to alternative methods using Euclidean distance between coefficient vectors and to methods that do not use habitat association models. These simulations demonstrate that our Mahalanobis-distance- based method was nearly always better than Euclidean-distance-based methods or methods not based on habitat association models. The methods used to develop candidate species groups are easily explained to other scientists and resource managers since they mainly rely on classical multivariate statistical methods. ?? 2008 Springer Science+Business Media, LLC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental and Ecological Statistics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10651-008-0093-9","issn":"13528505","usgsCitation":"Williams, C., and Heglund, P., 2009, A method for assigning species into groups based on generalized Mahalanobis distance between habitat model coefficients: Environmental and Ecological Statistics, v. 16, no. 4, p. 495-513, https://doi.org/10.1007/s10651-008-0093-9.","startPage":"495","endPage":"513","numberOfPages":"19","costCenters":[],"links":[{"id":217062,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10651-008-0093-9"},{"id":244974,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"4","noUsgsAuthors":false,"publicationDate":"2008-02-28","publicationStatus":"PW","scienceBaseUri":"5059e44fe4b0c8380cd4658b","contributors":{"authors":[{"text":"Williams, C.J.","contributorId":80071,"corporation":false,"usgs":true,"family":"Williams","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":460665,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Heglund, P.J.","contributorId":44505,"corporation":false,"usgs":true,"family":"Heglund","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":460664,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70037426,"text":"70037426 - 2009 - Defining winter trophic habitat of juvenile Gulf Sturgeon in the Suwannee and Apalachicola rivermouth estuaries, acoustic telemetry investigations","interactions":[],"lastModifiedDate":"2014-06-12T08:40:17","indexId":"70037426","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Defining winter trophic habitat of juvenile Gulf Sturgeon in the Suwannee and Apalachicola rivermouth estuaries, acoustic telemetry investigations","docAbstract":"Three automated listening post-telemetry studies were undertaken in the Suwannee and Apalachicola estuaries to gain knowledge of habitats use by juvenile Gulf Sturgeons (<i>Acipenser oxyrinchus desotoi</i>) on winter feeding grounds. A simple and reliable method for external attachment of small acoustic tags to the dorsal fin base was developed using shrink-tubing. Suspending receivers on masts below anchored buoys improved reception and facilitated downloading; a detection range of 500–2500 m was realized. In the Apalachicola estuary, juvenile GS stayed in shallow water (< 2 m) within the estuarine transition zone all winter in the vicinity of the Apalachicola River mouth. Juvenile GS high-use areas did not coincide with high density benthic macrofauna areas from the most recent (1999) benthos survey. In the Suwannee estuary, juveniles ranged widely and individually throughout oligohaline to mesohaline subareas of the estuary, preferentially using mesohaline subareas seaward of Suwannee Reef (52% of acoustic detections). The river mouth subarea was important only in early and late winter, during the times of adult Gulf Sturgeon migrations (41% of detections). Preferred winter feeding subareas coincided spatially with known areas of dense macrofaunal benthos concentrations. Following a dramatic drop in air and water temperatures, juvenile GS left the river mouth and estuary, subsequently being detected 8 km offshore in polyhaline open Gulf of Mexico waters, before returning to the estuary. Cold-event offshore excursions demonstrate that they can tolerate full-salinity polyhaline waters in the open Gulf of Mexico, for at least several days at a time. For juvenile sturgeons, the stress and metabolic cost of enduring high salinity (Jarvis et al., 2001; McKenzie et al., 2001; Singer and Ballantyne, 2002) for short periods in deep offshore waters seems adaptively advantageous relative to the risk of cold-event mortality in shallow inshore waters of lower salinity. Thus, while juveniles can tolerate high salinities for days to weeks to escape cold events, they appear to make only infrequent use of open polyhaline waters. Throughout the winter foraging period, juvenile GS stayed primarily within the core area of Suwannee River mouth influence, extending about 12 km north and south of the river mouth, and somewhat seaward of Suwannee Reef (< 5 km offshore). None were detected departing the core area past either of the northern or southern acoustic gates, located 66 and 52 km distant from the river mouth, respectively.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Applied Ichthyology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Blackwell Verlag","publisherLocation":"Berlin","doi":"10.1111/j.1439-0426.2009.01333.x","issn":"01758659","usgsCitation":"Sulak, K., Randall, M., Edwards, R.E., Summers, T., Luke, K., Smith, W., Norem, A., Harden, W.M., Lukens, R., Parauka, F., Bolden, S., and Lehnert, R., 2009, Defining winter trophic habitat of juvenile Gulf Sturgeon in the Suwannee and Apalachicola rivermouth estuaries, acoustic telemetry investigations: Journal of Applied Ichthyology, v. 25, no. 5, p. 505-515, https://doi.org/10.1111/j.1439-0426.2009.01333.x.","productDescription":"11 p.","startPage":"505","endPage":"515","numberOfPages":"11","costCenters":[{"id":566,"text":"Southeast Ecological Science Center","active":true,"usgs":true}],"links":[{"id":476140,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1439-0426.2009.01333.x","text":"Publisher Index Page"},{"id":217267,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1439-0426.2009.01333.x"},{"id":245200,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Florida","otherGeospatial":"Apalachicola River;Gulf Of Mexico;Suwannee River","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -85.299225,29.170777 ], [ -85.299225,30.003706 ], [ -82.99749,30.003706 ], [ -82.99749,29.170777 ], [ -85.299225,29.170777 ] ] ] } } ] }","volume":"25","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fe3be4b0c8380cd4ebe6","contributors":{"authors":[{"text":"Sulak, K. J. 0000-0002-4795-9310","orcid":"https://orcid.org/0000-0002-4795-9310","contributorId":76690,"corporation":false,"usgs":true,"family":"Sulak","given":"K. J.","affiliations":[],"preferred":false,"id":461008,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Randall, M.T.","contributorId":39616,"corporation":false,"usgs":true,"family":"Randall","given":"M.T.","email":"","affiliations":[],"preferred":false,"id":461005,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Edwards, R. E.","contributorId":92211,"corporation":false,"usgs":true,"family":"Edwards","given":"R.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":461010,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Summers, T.M.","contributorId":85014,"corporation":false,"usgs":true,"family":"Summers","given":"T.M.","email":"","affiliations":[],"preferred":false,"id":461009,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Luke, K.E.","contributorId":106347,"corporation":false,"usgs":true,"family":"Luke","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":461011,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Smith, W.T.","contributorId":107087,"corporation":false,"usgs":true,"family":"Smith","given":"W.T.","email":"","affiliations":[],"preferred":false,"id":461012,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Norem, A.D.","contributorId":20576,"corporation":false,"usgs":true,"family":"Norem","given":"A.D.","email":"","affiliations":[],"preferred":false,"id":461002,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Harden, William M.","contributorId":25800,"corporation":false,"usgs":true,"family":"Harden","given":"William","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":461004,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Lukens, R.H.","contributorId":18206,"corporation":false,"usgs":true,"family":"Lukens","given":"R.H.","email":"","affiliations":[],"preferred":false,"id":461001,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Parauka, F.","contributorId":25015,"corporation":false,"usgs":true,"family":"Parauka","given":"F.","affiliations":[],"preferred":false,"id":461003,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Bolden, S.","contributorId":66941,"corporation":false,"usgs":true,"family":"Bolden","given":"S.","email":"","affiliations":[],"preferred":false,"id":461007,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Lehnert, R.","contributorId":41256,"corporation":false,"usgs":true,"family":"Lehnert","given":"R.","email":"","affiliations":[],"preferred":false,"id":461006,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":70034125,"text":"70034125 - 2009 - Experimental alteration of artificial and natural impact melt rock from the Chesapeake Bay impact structure","interactions":[],"lastModifiedDate":"2012-03-12T17:21:45","indexId":"70034125","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Experimental alteration of artificial and natural impact melt rock from the Chesapeake Bay impact structure","docAbstract":"The alteration or transformation of impact melt rock to clay minerals, particularly smectite, has been recognized in several impact structures (e.g., Ries, Chicxulub, Mj??lnir). We studied the experimental alteration of two natural impact melt rocks from suevite clasts that were recovered from drill cores into the Chesapeake Bay impact structure and two synthetic glasses. These experiments were conducted at hydrothermal temperature (265 ??C) in order to reproduce conditions found in meltbearing deposits in the first thousand years after deposition. The experimental results were compared to geochemical modeling (PHREEQC) of the same alteration and to original mineral assemblages in the natural melt rock samples. In the alteration experiments, clay minerals formed on the surfaces of the melt particles and as fine-grained suspended material. Authigenic expanding clay minerals (saponite and Ca-smectite) and vermiculite/chlorite (clinochlore) were identified in addition to analcime. Ferripyrophyllite was formed in three of four experiments. Comparable minerals were predicted in the PHREEQC modeling. A comparison between the phases formed in our experiments and those in the cores suggests that the natural alteration occurred under hydrothermal conditions similar to those reproduced in the experiment. ?? 2009 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2009.2458(24)","issn":"00721077","usgsCitation":"Declercq, J., Dypvik, H., Aagaard, P., Jahren, J., Ferrell, R., and Horton, J., 2009, Experimental alteration of artificial and natural impact melt rock from the Chesapeake Bay impact structure: Special Paper of the Geological Society of America, no. 458, p. 559-569, https://doi.org/10.1130/2009.2458(24).","startPage":"559","endPage":"569","numberOfPages":"11","costCenters":[],"links":[{"id":244674,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216783,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2458(24)"}],"issue":"458","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0dbee4b0c8380cd53189","contributors":{"authors":[{"text":"Declercq, J.","contributorId":66514,"corporation":false,"usgs":true,"family":"Declercq","given":"J.","email":"","affiliations":[],"preferred":false,"id":444219,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dypvik, H.","contributorId":104299,"corporation":false,"usgs":true,"family":"Dypvik","given":"H.","affiliations":[],"preferred":false,"id":444220,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Aagaard, Per","contributorId":57690,"corporation":false,"usgs":false,"family":"Aagaard","given":"Per","email":"","affiliations":[{"id":24717,"text":"University of Oslo, Norway","active":true,"usgs":false}],"preferred":false,"id":444218,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jahren, J.","contributorId":18204,"corporation":false,"usgs":true,"family":"Jahren","given":"J.","email":"","affiliations":[],"preferred":false,"id":444216,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ferrell, R.E. Jr.","contributorId":54040,"corporation":false,"usgs":true,"family":"Ferrell","given":"R.E.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":444217,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Horton, J. Wright Jr. 0000-0001-6756-6365 whorton@usgs.gov","orcid":"https://orcid.org/0000-0001-6756-6365","contributorId":423,"corporation":false,"usgs":true,"family":"Horton","given":"J. Wright","suffix":"Jr.","email":"whorton@usgs.gov","affiliations":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":false,"id":444215,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70036574,"text":"70036574 - 2009 - High precision relocation of earthquakes at Iliamna Volcano, Alaska","interactions":[],"lastModifiedDate":"2019-04-29T10:37:30","indexId":"70036574","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"High precision relocation of earthquakes at Iliamna Volcano, Alaska","docAbstract":"<p><span>In August 1996, a period of elevated seismicity commenced beneath Iliamna Volcano, Alaska. This activity lasted until early 1997, consisted of over 3000 earthquakes, and was accompanied by elevated emissions of volcanic gases. No eruption occurred and seismicity returned to background levels where it has remained since. We use waveform alignment with bispectrum-verified cross-correlation and double-difference methods to relocate over 2000 earthquakes from 1996 to 2005 with high precision (~</span><span>&nbsp;</span><span>100&nbsp;m). The results of this analysis greatly clarify the distribution of seismic activity, revealing distinct features previously hidden by location scatter. A set of linear earthquake clusters diverges upward and southward from the main group of earthquakes. The events in these linear clusters show a clear southward migration with time. We suggest that these earthquakes represent either a response to degassing of the magma body, circulation of fluids due to exsolution from magma or heating of ground water, or possibly the intrusion of new dikes beneath Iliamna's southern flank. In addition, we speculate that the deeper, somewhat diffuse cluster of seismicity near and south of Iliamna's summit indicates the presence of an underlying magma body between about 2 and 4&nbsp;km depth below sea level, based on similar features found previously at several other Alaskan volcanoes.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jvolgeores.2009.04.016","issn":"03770273","usgsCitation":"Statz-Boyer, P., Thurber, C., Pesicek, J., and Prejean, S., 2009, High precision relocation of earthquakes at Iliamna Volcano, Alaska: Journal of Volcanology and Geothermal Research, v. 184, no. 3-4, p. 323-332, https://doi.org/10.1016/j.jvolgeores.2009.04.016.","productDescription":"10 p.","startPage":"323","endPage":"332","numberOfPages":"10","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":245448,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Mount Iliamna","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -153.21945190429688,\n              59.94125582542067\n            ],\n            [\n              -152.86651611328125,\n              59.94125582542067\n            ],\n            [\n              -152.86651611328125,\n              60.06209914960289\n            ],\n            [\n              -153.21945190429688,\n              60.06209914960289\n            ],\n            [\n              -153.21945190429688,\n              59.94125582542067\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"184","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a30c5e4b0c8380cd5d925","contributors":{"authors":[{"text":"Statz-Boyer, P.","contributorId":95306,"corporation":false,"usgs":true,"family":"Statz-Boyer","given":"P.","email":"","affiliations":[],"preferred":false,"id":456803,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thurber, C.","contributorId":107046,"corporation":false,"usgs":true,"family":"Thurber","given":"C.","email":"","affiliations":[],"preferred":false,"id":456805,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pesicek, J.D. 0000-0001-7964-5845","orcid":"https://orcid.org/0000-0001-7964-5845","contributorId":72233,"corporation":false,"usgs":true,"family":"Pesicek","given":"J.D.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":456802,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Prejean, S.","contributorId":103442,"corporation":false,"usgs":true,"family":"Prejean","given":"S.","email":"","affiliations":[],"preferred":false,"id":456804,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70034161,"text":"70034161 - 2009 - Geologic columns for the ICDP-USGS Eyreville B core, Chesapeake Bay impact structure: Impactites and crystalline rocks, 1766 to 1096 m depth","interactions":[],"lastModifiedDate":"2020-03-31T14:18:32","indexId":"70034161","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Geologic columns for the ICDP-USGS Eyreville B core, Chesapeake Bay impact structure: Impactites and crystalline rocks, 1766 to 1096 m depth","docAbstract":"<p>The International Continental Scientific Drilling Program (ICDP)-U.S. Geological Survey (USGS) Eyreville drill cores from the Chesapeake Bay impact structure provide one of the most complete geologic sections ever obtained from an impact structure. This paper presents a series of geologic columns and descriptive lithologic information for the lower impactite and crystalline-rock sections in the cores. The lowermost cored section (1766-1551 m depth) is a complex assemblage of mica schists that commonly contain graphite and fibrolitic sillimanite, intrusive granite pegmatites that grade into coarse granite, and local zones of mylonitic deformation. This basement-derived section is variably overprinted by brittle cataclastic fabrics and locally cut by dikes of polymict impact breccia, including several suevite dikes. An overlying succession of suevites and lithic impact breccias (1551-1397 m) includes a lower section dominated by polymict lithic impact breccia with blocks (up to 17 m) and boulders of cataclastic gneiss and an upper section (above 1474 m) of suevites and clast-rich impact melt rocks. The uppermost suevite is overlain by 26 m (1397-1371 m) of gravelly quartz sand that contains an amphibolite block and boulders of cataclasite and suevite. Above the sand, a 275-m-thick allochthonous granite slab (1371-1096 m) includes gneissic biotite granite, fine- and medium-to-coarse-grained biotite granites, and red altered granite near the base. The granite slab is overlain by more gravelly sand, and both are attributed to debris-avalanche and/or rockslide deposition that slightly preceded or accompanied seawater-resurge into the collapsing transient crater.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/2009.2458(02)","issn":"00721077","usgsCitation":"Horton, J., Gibson, R., Reimold, W., Wittmann, A., Gohn, G., and Edwards, L.E., 2009, Geologic columns for the ICDP-USGS Eyreville B core, Chesapeake Bay impact structure: Impactites and crystalline rocks, 1766 to 1096 m depth: Special Paper of the Geological Society of America, no. 458, p. 21-49, https://doi.org/10.1130/2009.2458(02).","productDescription":"29 p.","startPage":"21","endPage":"49","numberOfPages":"29","costCenters":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true},{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"links":[{"id":244711,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Chesapeake Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -77.54150390625,\n              36.73888412439431\n            ],\n            [\n              -75.157470703125,\n              36.73888412439431\n            ],\n            [\n              -75.157470703125,\n              39.70718665682654\n            ],\n            [\n              -77.54150390625,\n              39.70718665682654\n            ],\n            [\n              -77.54150390625,\n              36.73888412439431\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","issue":"458","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1938e4b0c8380cd558fc","contributors":{"authors":[{"text":"Horton, J. Wright Jr. 0000-0001-6756-6365 whorton@usgs.gov","orcid":"https://orcid.org/0000-0001-6756-6365","contributorId":423,"corporation":false,"usgs":true,"family":"Horton","given":"J. Wright","suffix":"Jr.","email":"whorton@usgs.gov","affiliations":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":false,"id":444371,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gibson, R.L.","contributorId":105143,"corporation":false,"usgs":true,"family":"Gibson","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":444376,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reimold, W.U.","contributorId":103401,"corporation":false,"usgs":true,"family":"Reimold","given":"W.U.","affiliations":[],"preferred":false,"id":444375,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wittmann, A.","contributorId":67744,"corporation":false,"usgs":true,"family":"Wittmann","given":"A.","email":"","affiliations":[],"preferred":false,"id":444374,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gohn, Gregory 0000-0003-2000-479X ggohn@usgs.gov","orcid":"https://orcid.org/0000-0003-2000-479X","contributorId":219822,"corporation":false,"usgs":true,"family":"Gohn","given":"Gregory","email":"ggohn@usgs.gov","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":444373,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Edwards, Lucy E. 0000-0003-4075-3317 leedward@usgs.gov","orcid":"https://orcid.org/0000-0003-4075-3317","contributorId":2647,"corporation":false,"usgs":true,"family":"Edwards","given":"Lucy","email":"leedward@usgs.gov","middleInitial":"E.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":444372,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70036457,"text":"70036457 - 2009 - Reply to \"comment on 'revisiting the 1872 owens valley, California, earthquake' by Susan E. Hough and Kate Hutton\" by William H. Bakun","interactions":[],"lastModifiedDate":"2012-03-12T17:22:04","indexId":"70036457","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Reply to \"comment on 'revisiting the 1872 owens valley, California, earthquake' by Susan E. Hough and Kate Hutton\" by William H. Bakun","docAbstract":"[No abstract available]","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120090026","issn":"00371106","usgsCitation":"Hough, S., and Hutton, K., 2009, Reply to \"comment on 'revisiting the 1872 owens valley, California, earthquake' by Susan E. Hough and Kate Hutton\" by William H. Bakun: Bulletin of the Seismological Society of America, v. 99, no. 4, p. 2591-2593, https://doi.org/10.1785/0120090026.","startPage":"2591","endPage":"2593","numberOfPages":"3","costCenters":[],"links":[{"id":476253,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://resolver.caltech.edu/CaltechAUTHORS:20140116-125504296","text":"External Repository"},{"id":246415,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218412,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120090026"}],"volume":"99","issue":"4","noUsgsAuthors":false,"publicationDate":"2009-07-29","publicationStatus":"PW","scienceBaseUri":"505aa75de4b0c8380cd8538b","contributors":{"authors":[{"text":"Hough, S. E. 0000-0002-5980-2986","orcid":"https://orcid.org/0000-0002-5980-2986","contributorId":7316,"corporation":false,"usgs":true,"family":"Hough","given":"S. E.","affiliations":[],"preferred":false,"id":456241,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hutton, K.","contributorId":63183,"corporation":false,"usgs":true,"family":"Hutton","given":"K.","email":"","affiliations":[],"preferred":false,"id":456242,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70037396,"text":"70037396 - 2009 - Optical dating of the anastasia formation, northeastern florida, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:22:10","indexId":"70037396","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3443,"text":"Southeastern Geology","active":true,"publicationSubtype":{"id":10}},"title":"Optical dating of the anastasia formation, northeastern florida, USA","docAbstract":"The single-aliquot regenerative-dose (SAR) procedure was used to obtain optically stimulated luminescence ages to determine the depositional age of the upper part of the Anastasia Formation. This unit, which crops out along the east coast of Florida, is one of the most culturally and economically important coquina deposits in North America. Rock samples from the upper three meters of exposure at three locations were collected. Additional materials for paleontological analysis were also taken. Based on our samples, the luminescence ages of the Anastasia Formation are well within marine isotope stage 5, which is supported by the results of Osmond et al. (1970) based on U/Th ages. The associated fossil assemblages support our luminescence age determinations. Associated fossils fall within the Rancholabrean North American Land Mammal Age (300 10 ka) and the fossil mollusk assemblage consists entirely of modern species.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Southeastern Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00383678","usgsCitation":"Burdette, K., Rink, J., Means, G., and Portell, R., 2009, Optical dating of the anastasia formation, northeastern florida, USA: Southeastern Geology, v. 46, no. 4, p. 173-185.","startPage":"173","endPage":"185","numberOfPages":"13","costCenters":[],"links":[{"id":245047,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"46","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6ecde4b0c8380cd757e8","contributors":{"authors":[{"text":"Burdette, K.E.","contributorId":41253,"corporation":false,"usgs":true,"family":"Burdette","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":460865,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rink, J.W.","contributorId":103120,"corporation":false,"usgs":true,"family":"Rink","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":460867,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Means, G.H.","contributorId":76348,"corporation":false,"usgs":true,"family":"Means","given":"G.H.","email":"","affiliations":[],"preferred":false,"id":460866,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Portell, R.W.","contributorId":37990,"corporation":false,"usgs":true,"family":"Portell","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":460864,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70179330,"text":"70179330 - 2009 - Using GIS/remote sensing models to quantify and monitor Southwestern Willow Flycatcher breeding habitat","interactions":[],"lastModifiedDate":"2016-12-28T17:13:25","indexId":"70179330","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":18,"text":"Abstract or summary"},"title":"Using GIS/remote sensing models to quantify and monitor Southwestern Willow Flycatcher breeding habitat","docAbstract":"<p>n/a</p>","largerWorkType":{"id":24,"text":"Conference Paper"},"largerWorkTitle":"Proceedings of the second all-USGS modeling conference: Painting the big picture","conferenceTitle":"Second All-USGS Modeling Conference","conferenceDate":" February 11-14, 2008","conferenceLocation":"Orange Beach, Ala.","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Hatten, J.R., 2009, Using GIS/remote sensing models to quantify and monitor Southwestern Willow Flycatcher breeding habitat, <i>in</i> Proceedings of the second all-USGS modeling conference: Painting the big picture, Orange Beach, Ala.,  February 11-14, 2008, 1 p.","productDescription":"1 p.","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":332607,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/sir/2009/5013/sir2009-5013.pdf"},{"id":332608,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5864dd56e4b0cd2dabe7c1eb","contributors":{"authors":[{"text":"Hatten, James R. 0000-0003-4676-8093 jhatten@usgs.gov","orcid":"https://orcid.org/0000-0003-4676-8093","contributorId":3431,"corporation":false,"usgs":true,"family":"Hatten","given":"James","email":"jhatten@usgs.gov","middleInitial":"R.","affiliations":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"preferred":true,"id":656808,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70037402,"text":"70037402 - 2009 - Dune mobility and aridity at the desert margin of northern China at a time of peak monsoon strength","interactions":[],"lastModifiedDate":"2012-03-12T17:22:09","indexId":"70037402","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Dune mobility and aridity at the desert margin of northern China at a time of peak monsoon strength","docAbstract":"Wind-blown sands were mobile at many sites along the desert margin in northern China during the early Holocene (11.5-8 ka ago), based on extensive new numerical dating. This mobility implies low effective moisture at the desert margin, in contrast to growing evidence for greater than modern monsoon precipitation at the same time in central and southern China. Dry conditions in the early Holocene at the desert margin can be explained through a dynamic link between enhanced diabatic heating in the core region of the strengthened monsoon and increased subsidence in drylands to the north, combined with high evapotranspiration rates due to high summer temperatures. After 8 ka ago, as the monsoon weakened and lower temperatures reduced evapotranspiration, eolian sands were stabilized by vegetation. Aridity and dune mobility at the desert margin and a strengthened monsoon can both be explained as responses to high summer insolation in the early Holocene. ?? 2009 Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/G30240A.1","issn":"00917613","usgsCitation":"Mason, J., Lu, H., Zhou, Y., Miao, X., Swinehart, J.B., Liu, Z., Goble, R., and Yi, S., 2009, Dune mobility and aridity at the desert margin of northern China at a time of peak monsoon strength: Geology, v. 37, no. 10, p. 947-950, https://doi.org/10.1130/G30240A.1.","startPage":"947","endPage":"950","numberOfPages":"4","costCenters":[],"links":[{"id":217151,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G30240A.1"},{"id":245072,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0416e4b0c8380cd50792","contributors":{"authors":[{"text":"Mason, J.A.","contributorId":31507,"corporation":false,"usgs":true,"family":"Mason","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":460897,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lu, H.","contributorId":49936,"corporation":false,"usgs":true,"family":"Lu","given":"H.","email":"","affiliations":[],"preferred":false,"id":460899,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhou, Y.","contributorId":70526,"corporation":false,"usgs":true,"family":"Zhou","given":"Y.","email":"","affiliations":[],"preferred":false,"id":460901,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Miao, X.","contributorId":60753,"corporation":false,"usgs":true,"family":"Miao","given":"X.","email":"","affiliations":[],"preferred":false,"id":460900,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Swinehart, J. B.","contributorId":25244,"corporation":false,"usgs":true,"family":"Swinehart","given":"J.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":460896,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Liu, Z.","contributorId":70943,"corporation":false,"usgs":true,"family":"Liu","given":"Z.","email":"","affiliations":[],"preferred":false,"id":460902,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Goble, R.J.","contributorId":21265,"corporation":false,"usgs":true,"family":"Goble","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":460895,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Yi, S.","contributorId":33936,"corporation":false,"usgs":false,"family":"Yi","given":"S.","email":"","affiliations":[{"id":13117,"text":"Institute of Arctic Biology, University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":460898,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70034194,"text":"70034194 - 2009 - Sources of sediment to the coastal waters of the Southern California Bight","interactions":[],"lastModifiedDate":"2012-03-12T17:21:45","indexId":"70034194","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Sources of sediment to the coastal waters of the Southern California Bight","docAbstract":"The sources of sediment to the Southern California Bight were investigated with new calculations and published records of sediment fluxes, both natural and anthropogenic. We find that rivers are by far the largest source of sediment, producing over 10 ?? 10<sup>6</sup> t/yr on average, or over 80% of the sediment input to the Bight. This river flux is variable, however, over both space and time. The rivers draining the Transverse Ranges produce sediment at rates approximately an order of magnitude greater than the Peninsular Ranges (600-1500 t/km<sup>2</sup>/yr versus &lt;90 t/km<sup>2</sup>/yr, respectively). Although the Transverse Range rivers represent only 23% of the total Southern California watershed drainage area, they are responsible for over 75% of the total sediment flux. River sediment flux is ephemeral and highly pulsed due to the semiarid climate and the influence of infrequent large storms. For more than 90% of the time, negligible amounts of sediment are discharged from the region's rivers, and over half of the post-1900 sediment load has been discharged during events with recurrence intervals greater than 10 yr. These rare, yet important, events are related to the El Ni??o-Southern Oscillation (ENSO), and the majority of sediment flux occurs during ENSO periods. Temporal trends in sediment discharge due to land-use changes and river damming are also observed. We estimate that there has been a 45% reduction in suspended-sediment flux due to the construction of dams. However, pre-dam sediment loads were likely artificially high due to the massive land-use changes of coastal California to rangeland during the nineteenth century. This increase in sediment production is observed in estuarine deposits throughout coastal California, which reveal that sedimentation rates were two to ten times higher during the nineteenth and twentieth centuries than during pre-European colonization. ?? 2009 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2009.2454(2.2)","issn":"00721077","usgsCitation":"Warrick, J., and Farnsworth, K., 2009, Sources of sediment to the coastal waters of the Southern California Bight: Special Paper of the Geological Society of America, no. 454, p. 39-52, https://doi.org/10.1130/2009.2454(2.2).","startPage":"39","endPage":"52","numberOfPages":"14","costCenters":[],"links":[{"id":216818,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2454(2.2)"},{"id":244712,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"454","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b938fe4b08c986b31a56c","contributors":{"authors":[{"text":"Warrick, J.A.","contributorId":53503,"corporation":false,"usgs":true,"family":"Warrick","given":"J.A.","affiliations":[],"preferred":false,"id":444550,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Farnsworth, K.L.","contributorId":36746,"corporation":false,"usgs":true,"family":"Farnsworth","given":"K.L.","email":"","affiliations":[],"preferred":false,"id":444549,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70034152,"text":"70034152 - 2009 - Recent faulting in the Gulf of Santa Catalina: San Diego to Dana Point","interactions":[],"lastModifiedDate":"2012-03-12T17:21:45","indexId":"70034152","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Recent faulting in the Gulf of Santa Catalina: San Diego to Dana Point","docAbstract":"We interpret seismic-reflection profiles to determine the location and offset mode of Quaternary offshore faults beneath the Gulf of Santa Catalina in the inner California Continental Borderland. These faults are primarily northwest-trending, right-lateral, strike-slip faults, and are in the offshore Rose Canyon-Newport-Inglewood, Coronado Bank, Palos Verdes, and San Diego Trough fault zones. In addition we describe a suite of faults imaged at the base of the continental slope between Dana Point and Del Mar, California. Our new interpretations are based on high-resolution, multichannel seismic (MCS), as well as very high resolution Huntec and GeoPulse seismic-reflection profiles collected by the U.S. Geological Survey from 1998 to 2000 and MCS data collected by WesternGeco in 1975 and 1981, which have recently been made publicly available. Between La Jolla and Newport Beach, California, the Rose Canyon and Newport-Inglewood fault zones are multistranded and generally underlie the shelf break. The Rose Canyon fault zone has a more northerly strike; a left bend in the fault zone is required to connect with the Newport-Inglewood fault zone. A prominent active anticline at mid-slope depths (300-400 m) is imaged seaward of where the Rose Canyon fault zone merges with the Newport-Inglewood fault zone. The Coronado Bank fault zone is a steeply dipping, northwest-trending zone consisting of multiple strands that are imaged from south of the U.S.-Mexico border to offshore of San Mateo Point. South of the La Jolla fan valley, the Coronado Bank fault zone is primarily transtensional; this section of the fault zone ends at the La Jolla fan valley in a series of horsetail splays. The northern section of the Coronado Bank fault zone is less well developed. North of the La Jolla fan valley, the Coronado Bank fault zone forms a positive flower structure that can be mapped at least as far north as Oceanside, a distance of ??35 km. However, north of Oceanside, the Coronado Bank fault zone is more discontinuous and in places has no strong physiographic expression. The San Diego Trough fault zone consists of one or two well-defined linear fault strands that cut through the center of the San Diego Trough and strike N30??W. North of the La Jolla fan valley, this fault zone steps to the west and is composed of up to four fault strands. At the base of the continental slope, faults that show recency of movement include the San Onofre fault and reverse, oblique-slip faulting associated with the San Mateo and Carlsbad faults. In addition, the low-angle Oceanside detachment fault is imaged beneath much of the continental slope, although reflectors associated with the detachment are more prominent in the area directly offshore of San Mateo Point. North of San Mateo Point, the Oceanside fault is imaged as a northeast-dipping detachment surface with prominent folds deforming hanging-wall strata. South of San Mateo point, reflectors associated with the Oceanside detachment are often discontinuous with variable dip as imaged in WesternGeco MCS data. Recent motion along the Oceanside detachment as a reactivated thrust fault appears to be limited primarily to the area between Dana and San Mateo Points. Farther south, offshore of Carlsbad, an additional area of folding associated with the Carlsbad fault also is imaged near the base of the slope. These folds coincide with the intersection of a narrow subsurface ridge that trends at a high angle to and intersects the base of the continental slope. The complex pattern of faulting observed along the base of the continental slope associated with the San Mateo, San Onofre, and Carlsbad fault zones may be the result of block rotation. We propose that the clockwise rotation of a small crustal block between the Newport-Inglewood-Rose Canyon and Coronado Bank fault zones accounts for the localized enhanced folding along the Gulf of Santa Catalina margin. Prominent subsurface basement ridges imaged offshore of Dana Point m","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2009.2454(4.5)","issn":"00721077","usgsCitation":"Ryan, H.F., Legg, M., Conrad, J., and Sliter, R.W., 2009, Recent faulting in the Gulf of Santa Catalina: San Diego to Dana Point: Special Paper of the Geological Society of America, no. 454, p. 291-315, https://doi.org/10.1130/2009.2454(4.5).","startPage":"291","endPage":"315","numberOfPages":"25","costCenters":[],"links":[{"id":216724,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2454(4.5)"},{"id":244610,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"454","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9619e4b0c8380cd81dd7","contributors":{"authors":[{"text":"Ryan, H. F.","contributorId":18002,"corporation":false,"usgs":true,"family":"Ryan","given":"H.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":444343,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Legg, M.R.","contributorId":56881,"corporation":false,"usgs":true,"family":"Legg","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":444346,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Conrad, J. E.","contributorId":32520,"corporation":false,"usgs":true,"family":"Conrad","given":"J. E.","affiliations":[],"preferred":false,"id":444344,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sliter, R. W.","contributorId":37758,"corporation":false,"usgs":true,"family":"Sliter","given":"R.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":444345,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70037033,"text":"70037033 - 2009 - Size distributions and failure initiation of submarine and subaerial landslides","interactions":[],"lastModifiedDate":"2017-11-18T10:15:38","indexId":"70037033","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Size distributions and failure initiation of submarine and subaerial landslides","docAbstract":"Landslides are often viewed together with other natural hazards, such as earthquakes and fires, as phenomena whose size distribution obeys an inverse power law. Inverse power law distributions are the result of additive avalanche processes, in which the final size cannot be predicted at the onset of the disturbance. Volume and area distributions of submarine landslides along the U.S. Atlantic continental slope follow a lognormal distribution and not an inverse power law. Using Monte Carlo simulations, we generated area distributions of submarine landslides that show a characteristic size and with few smaller and larger areas, which can be described well by a lognormal distribution. To generate these distributions we assumed that the area of slope failure depends on earthquake magnitude, i.e., that failure occurs simultaneously over the area affected by horizontal ground shaking, and does not cascade from nucleating points. Furthermore, the downslope movement of displaced sediments does not entrain significant amounts of additional material. Our simulations fit well the area distribution of landslide sources along the Atlantic continental margin, if we assume that the slope has been subjected to earthquakes of magnitude ??? 6.3. Regions of submarine landslides, whose area distributions obey inverse power laws, may be controlled by different generation mechanisms, such as the gradual development of fractures in the headwalls of cliffs. The observation of a large number of small subaerial landslides being triggered by a single earthquake is also compatible with the hypothesis that failure occurs simultaneously in many locations within the area affected by ground shaking. Unlike submarine landslides, which are found on large uniformly-dipping slopes, a single large landslide scarp cannot form on land because of the heterogeneous morphology and short slope distances of tectonically-active subaerial regions. However, for a given earthquake magnitude, the total area affected by subaerial landslides is comparable to that calculated by slope stability analysis for submarine landslides. The area distribution of subaerial landslides from a single event may be determined by the size distribution of the morphology of the affected area, not by the initiation process. ?? 2009 Elsevier B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earth and Planetary Science Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.epsl.2009.07.031","issn":"0012821X","usgsCitation":"ten Brink, U., Barkan, R., Andrews, B., and Chaytor, J., 2009, Size distributions and failure initiation of submarine and subaerial landslides: Earth and Planetary Science Letters, v. 287, no. 1-2, p. 31-42, https://doi.org/10.1016/j.epsl.2009.07.031.","startPage":"31","endPage":"42","numberOfPages":"12","costCenters":[],"links":[{"id":245173,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":217243,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.epsl.2009.07.031"}],"volume":"287","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b911be4b08c986b31976f","contributors":{"authors":[{"text":"ten Brink, Uri S. 0000-0001-6858-3001 utenbrink@usgs.gov","orcid":"https://orcid.org/0000-0001-6858-3001","contributorId":127560,"corporation":false,"usgs":true,"family":"ten Brink","given":"Uri S.","email":"utenbrink@usgs.gov","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true},{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"preferred":false,"id":459067,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Barkan, R.","contributorId":35987,"corporation":false,"usgs":true,"family":"Barkan","given":"R.","affiliations":[],"preferred":false,"id":459065,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Andrews, B.D.","contributorId":87737,"corporation":false,"usgs":true,"family":"Andrews","given":"B.D.","email":"","affiliations":[],"preferred":false,"id":459068,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Chaytor, J.D.","contributorId":80936,"corporation":false,"usgs":true,"family":"Chaytor","given":"J.D.","affiliations":[],"preferred":false,"id":459066,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70034278,"text":"70034278 - 2009 - The 1170 and 1202 CE Dead Sea Rift earthquakes and long-term magnitude distribution of the Dead Sea Fault zone","interactions":[],"lastModifiedDate":"2012-03-12T17:21:47","indexId":"70034278","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2116,"text":"Israel Journal of Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"The 1170 and 1202 CE Dead Sea Rift earthquakes and long-term magnitude distribution of the Dead Sea Fault zone","docAbstract":"In combination with the historical record, paleoseismic investigations have provided a record of large earthquakes in the Dead Sea Rift that extends back over 1500 years. Analysis of macroseismic effects can help refine magnitude estimates for large historical events. In this study we consider the detailed intensity distributions for two large events, in 1170 CE and 1202 CE, as determined from careful reinterpretation of available historical accounts, using the 1927 Jericho earthquake as a guide in their interpretation. In the absence of an intensity attenuation relationship for the Dead Sea region, we use the 1927 Jericho earthquake to develop a preliminary relationship based on a modification of the relationships developed in other regions. Using this relation, we estimate M7.6 for the 1202 earthquake and M6.6 for the 1170 earthquake. The uncertainties for both estimates are large and difficult to quantify with precision. The large uncertainties illustrate the critical need to develop a regional intensity attenuation relation. We further consider the distribution of magnitudes in the historic record and show that it is consistent with a b-value distribution with a b-value of 1. Considering the entire Dead Sea Rift zone, we show that the seismic moment release rate over the past 1500 years is sufficient, within the uncertainties of the data, to account for the plate tectonic strain rate along the plate boundary. The results reveal that an earthquake of M7.8 is expected within the zone on average every 1000 years. ?? 2011 Science From Israel/LPPLtd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Israel Journal of Earth Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1560/IJES.58.3-4.295","issn":"00212164","usgsCitation":"Hough, S., and Avni, R., 2009, The 1170 and 1202 CE Dead Sea Rift earthquakes and long-term magnitude distribution of the Dead Sea Fault zone: Israel Journal of Earth Sciences, v. 58, no. 3-4, p. 295-308, https://doi.org/10.1560/IJES.58.3-4.295.","startPage":"295","endPage":"308","numberOfPages":"14","costCenters":[],"links":[{"id":216584,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1560/IJES.58.3-4.295"},{"id":244464,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"58","issue":"3-4","noUsgsAuthors":false,"publicationDate":"2012-01-30","publicationStatus":"PW","scienceBaseUri":"505ba614e4b08c986b320e93","contributors":{"authors":[{"text":"Hough, S. E. 0000-0002-5980-2986","orcid":"https://orcid.org/0000-0002-5980-2986","contributorId":7316,"corporation":false,"usgs":true,"family":"Hough","given":"S. E.","affiliations":[],"preferred":false,"id":445052,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Avni, R.","contributorId":36385,"corporation":false,"usgs":true,"family":"Avni","given":"R.","email":"","affiliations":[],"preferred":false,"id":445053,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70037419,"text":"70037419 - 2009 - Variable growth and longevity of yellow bullhead (Ameiurus natalis) in the Everglades of south Florida, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:22:09","indexId":"70037419","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Variable growth and longevity of yellow bullhead (Ameiurus natalis) in the Everglades of south Florida, USA","docAbstract":"Yellow bullhead (Ictaluridae: Ameiurus natalis) is the most abundant ictalurid catfish in the Everglades of southern Florida, USA, and, as both prey and predator, is one of many essential components in the ecological-simulation models used in assessing restoration success in the Everglades. Little is known of its biology and life history in this southernmost portion of its native range; the present study provides the first estimates of age and growth from the Everglades. In total, 144 yellow bullheads of 97-312 mm total length (TL) were collected from canals and marshes of the Everglades between April 2000 and January 2001, and from October 2003 to February 2005. Fish were aged using cross-sections of pectoral spines and ranged from 1-12 years, with the maximum age almost twice that of any yellow bullhead previously reported. Yellow bullheads from south Florida grew relatively rapidly during their first 3 years, but after age 5 growth slowed and fish approached an asymptote of ???214 mm TL. Compared to other populations in the United States, yellow bullhead in the Everglades grew relatively slowly, were smaller at age overall, but survived to older ages. ?? 2009 Blackwell Verlag GmbH.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Applied Ichthyology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1439-0426.2009.01300.x","issn":"01758659","usgsCitation":"Murie, D., Parkyn, D., Loftus, W., and Nico, L., 2009, Variable growth and longevity of yellow bullhead (Ameiurus natalis) in the Everglades of south Florida, USA: Journal of Applied Ichthyology, v. 25, no. 6, p. 740-745, https://doi.org/10.1111/j.1439-0426.2009.01300.x.","startPage":"740","endPage":"745","numberOfPages":"6","costCenters":[],"links":[{"id":476223,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1439-0426.2009.01300.x","text":"Publisher Index Page"},{"id":245166,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":217238,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1439-0426.2009.01300.x"}],"volume":"25","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc141e4b08c986b32a4d9","contributors":{"authors":[{"text":"Murie, D.J.","contributorId":89741,"corporation":false,"usgs":true,"family":"Murie","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":460968,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Parkyn, D.C.","contributorId":29245,"corporation":false,"usgs":true,"family":"Parkyn","given":"D.C.","affiliations":[],"preferred":false,"id":460965,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Loftus, W.F.","contributorId":29363,"corporation":false,"usgs":true,"family":"Loftus","given":"W.F.","email":"","affiliations":[],"preferred":false,"id":460966,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nico, L.G. 0000-0002-4488-7737","orcid":"https://orcid.org/0000-0002-4488-7737","contributorId":83052,"corporation":false,"usgs":true,"family":"Nico","given":"L.G.","affiliations":[],"preferred":false,"id":460967,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70037464,"text":"70037464 - 2009 - Evidence of multidecadal climate variability and the Atlantic Multidecadal Oscillation from a Gulf of Mexico sea-surface temperature-proxy record","interactions":[],"lastModifiedDate":"2023-12-07T14:51:00.547383","indexId":"70037464","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1742,"text":"Geo-Marine Letters","active":true,"publicationSubtype":{"id":10}},"title":"Evidence of multidecadal climate variability and the Atlantic Multidecadal Oscillation from a Gulf of Mexico sea-surface temperature-proxy record","docAbstract":"<p><span>A comparison of a Mg/Ca-based sea-surface temperature (SST)-anomaly record from the northern Gulf of Mexico, a calculated index of variability in observed North Atlantic SST known as the Atlantic Multidecadal Oscillation (AMO), and a tree-ring reconstruction of the AMO contain similar patterns of variation over the last 110 years. Thus, the multidecadal variability observed in the instrumental record is present in the tree-ring and Mg/Ca proxy data. Frequency analysis of the Gulf of Mexico SST record and the tree-ring AMO reconstruction from 1550 to 1990 found similar multidecadal-scale periodicities (~30–60 years). This multidecadal periodicity is about half the observed (60–80 years) variability identified in the AMO for the 20th century. The historical records of hurricane landfalls reveal increased landfalls in the Gulf Coast region during time intervals when the AMO index is positive (warmer SST), and decreased landfalls when the AMO index is negative (cooler SST). Thus, we conclude that alternating intervals of high and low hurricane landfall occurrences may continue on multidecadal timescales along the northern Gulf Coast. However, given the short length of the instrumental record, the actual frequency and stability of the AMO are uncertain, and additional AMO proxy records are needed to establish the character of multidecadal-scale SST variability in the North Atlantic.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s00367-009-0154-6","usgsCitation":"Poore, R., DeLong, K.L., Richey, J., and Quinn, T.M., 2009, Evidence of multidecadal climate variability and the Atlantic Multidecadal Oscillation from a Gulf of Mexico sea-surface temperature-proxy record: Geo-Marine Letters, v. 29, no. 6, p. 477-484, https://doi.org/10.1007/s00367-009-0154-6.","productDescription":"8 p.","startPage":"477","endPage":"484","numberOfPages":"8","costCenters":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":245363,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alabama, Florida, Louisiana, Mississippi, Texas","otherGeospatial":"Gulf of Mexico","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -80.08387926403837,\n              25.301918867373118\n            ],\n            [\n              -83.36445674406838,\n              30.46212264770439\n            ],\n            [\n              -98.3474126351965,\n              30.873625135364605\n            ],\n            [\n              -98.68428997730477,\n              25.9876155709089\n            ],\n            [\n              -96.90384553938452,\n              25.907104062373627\n            ],\n            [\n              -96.4641385719641,\n              27.915175629556707\n            ],\n            [\n              -94.60991921418577,\n              28.90260199767052\n            ],\n            [\n              -92.36316751421896,\n              29.032039277632876\n            ],\n            [\n              -90.12844167636035,\n              28.66080710509815\n            ],\n            [\n              -87.34951890399915,\n              29.75234559869819\n            ],\n            [\n              -84.14026214078959,\n              29.190036756192097\n            ],\n            [\n              -81.27229781898602,\n              24.979412009739562\n            ],\n            [\n              -80.08387926403837,\n              25.301918867373118\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"29","issue":"6","noUsgsAuthors":false,"publicationDate":"2009-08-29","publicationStatus":"PW","scienceBaseUri":"505a0d65e4b0c8380cd52fc3","contributors":{"authors":[{"text":"Poore, R.Z.","contributorId":35314,"corporation":false,"usgs":true,"family":"Poore","given":"R.Z.","email":"","affiliations":[],"preferred":false,"id":461194,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"DeLong, K. L.","contributorId":88980,"corporation":false,"usgs":true,"family":"DeLong","given":"K.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":461197,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Richey, J.N.","contributorId":37156,"corporation":false,"usgs":true,"family":"Richey","given":"J.N.","email":"","affiliations":[],"preferred":false,"id":461195,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Quinn, T. M.","contributorId":71320,"corporation":false,"usgs":true,"family":"Quinn","given":"T.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":461196,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70037009,"text":"70037009 - 2009 - Contrasting residence times and fluxes of water and sulfate in two small forested watersheds in Virginia, USA","interactions":[],"lastModifiedDate":"2018-10-05T10:11:25","indexId":"70037009","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3352,"text":"Science of the Total Environment","active":true,"publicationSubtype":{"id":10}},"title":"Contrasting residence times and fluxes of water and sulfate in two small forested watersheds in Virginia, USA","docAbstract":"<p><span>Watershed mass balances for solutes of atmospheric origin may be complicated by the residence times of water and solutes at various time scales. In two small forested headwater catchments in the Appalachian Mountains of Virginia, USA, mean annual export rates of SO</span><sub>4</sub><sup>=</sup><span>&nbsp;differ by a factor of 2, and seasonal variations in SO</span><sub>4</sub><sup>=</sup><span>&nbsp;concentrations in atmospheric deposition and stream water are out of phase. These features were investigated by comparing&nbsp;</span><sup>3</sup><span>H,&nbsp;</span><sup>35</sup><span>S,&nbsp;</span><i>δ</i><sup>34</sup><span>S,&nbsp;</span><i>δ</i><sup>2</sup><span>H,&nbsp;</span><i>δ</i><sup>18</sup><span>O,&nbsp;</span><i>δ</i><sup>3</sup><span>He, CFC-12, SF</span><sub>6</sub><span>, and chemical analyses of open deposition, throughfall, stream water, and spring water. The concentrations of SO</span><sub>4</sub><sup>=</sup><span>&nbsp;and radioactive&nbsp;</span><sup>35</sup><span>S were about twice as high in throughfall as in open deposition, but the weighted composite values of&nbsp;</span><sup>35</sup><span>S/S (11.1 and 12.1</span><span>&nbsp;</span><span>×</span><span>&nbsp;</span><span>10</span><sup>−&nbsp;15</sup><span>) and&nbsp;</span><i>δ</i><sup>34</sup><span>S (+</span><span>&nbsp;</span><span>3.8 and +</span><span>&nbsp;</span><span>4.1‰) were similar. In both streams (Shelter Run, Mill Run),&nbsp;</span><sup>3</sup><span>H concentrations and&nbsp;</span><i>δ</i><sup>34</sup><span>S values during high flow were similar to those of modern deposition,&nbsp;</span><i>δ</i><sup>2</sup><span>H and&nbsp;</span><i>δ</i><sup>18</sup><span>O values exhibited damped seasonal variations, and&nbsp;</span><sup>35</sup><span>S/S ratios (0–3</span><span>&nbsp;</span><span>×</span><span>&nbsp;</span><span>10</span><sup>−&nbsp;15</sup><span>) were low throughout the year, indicating inter-seasonal to inter-annual storage and release of atmospheric SO</span><sub>4</sub><sup>=</sup><span>&nbsp;in both watersheds. In the Mill Run watershed,&nbsp;</span><sup>3</sup><span>H concentrations in stream base flow (10–13&nbsp;TU) were consistent with relatively young groundwater discharge, most&nbsp;</span><i>δ</i><sup>34</sup><span>S values were approximately the same as the modern atmospheric deposition values, and the annual export rate of SO</span><sub>4</sub><sup>=</sup><span>&nbsp;was equal to or slightly greater than the modern deposition rate. In the Shelter Run watershed,&nbsp;</span><sup>3</sup><span>H concentrations in stream base flow (1–3&nbsp;TU) indicate that much of the discharging ground water had been deposited prior to the onset of atmospheric nuclear bomb testing in the 1950s, base flow&nbsp;</span><i>δ</i><sup>34</sup><span>S values (+</span><span>&nbsp;</span><span>1.6‰) were significantly lower than the modern deposition values, and the annual export rate of SO</span><sub>4</sub><sup>=</sup><span>&nbsp;was less than the modern deposition rate. Concentrations of&nbsp;</span><sup>3</sup><span>H and&nbsp;</span><sup>35</sup><span>S in Shelter Run base flow, and of&nbsp;</span><sup>3</sup><span>H,&nbsp;</span><sup>3</sup><span>He, CFC-12, SF</span><sub>6</sub><span>, and&nbsp;</span><sup>35</sup><span>S in a spring discharging to Shelter Run, all were consistent with a bimodal distribution of discharging ground-water ages with approximately 5–20% less than a few years old and 75–95% more than 40&nbsp;years old. These results provide evidence for 3 important time-scales of SO</span><sub>4</sub><sup>=</sup><span>&nbsp;transport through the watersheds: (1) short-term (weekly to monthly) storage and release of dry deposition in the forest canopy between precipitation events; (2) mid-term (seasonal to interannual) cycles in net storage in the near-surface environment, and (3) long-term (decadal to centennial) storage in deep ground water that appears to be related to relatively low SO</span><sub>4</sub><sup>=</sup><span>&nbsp;concentrations in spring discharge that dominates Shelter Run base flow. It is possible that the relatively low concentrations and low&nbsp;</span><i>δ</i><sup>34</sup><span>S values of SO</span><sub>4</sub><sup>=</sup><span>&nbsp;in spring discharge and Shelter Run base flow may reflect those of atmospheric deposition before the middle of the 20th century. In addition to storage in soils and biota, variations in ground-water residence times at a wide range of time scales may have important effects on monitoring, modeling, and predicting watershed responses to changing atmospheric deposition in small watersheds.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.scitotenv.2009.02.007","issn":"00489697","usgsCitation":"Böhlke, J., and Michel, R.L., 2009, Contrasting residence times and fluxes of water and sulfate in two small forested watersheds in Virginia, USA: Science of the Total Environment, v. 407, no. 14, p. 4363-4377, https://doi.org/10.1016/j.scitotenv.2009.02.007.","productDescription":"15 p.","startPage":"4363","endPage":"4377","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":245236,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":217301,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.scitotenv.2009.02.007"}],"volume":"407","issue":"14","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fa7be4b0c8380cd4db08","contributors":{"authors":[{"text":"Böhlke, J.K. 0000-0001-5693-6455","orcid":"https://orcid.org/0000-0001-5693-6455","contributorId":96696,"corporation":false,"usgs":true,"family":"Böhlke","given":"J.K.","affiliations":[],"preferred":false,"id":458947,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Michel, R. L.","contributorId":86375,"corporation":false,"usgs":true,"family":"Michel","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":458946,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70034091,"text":"70034091 - 2009 - Dispersal of river sediment in the Southern California Bight","interactions":[],"lastModifiedDate":"2012-03-12T17:21:45","indexId":"70034091","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Dispersal of river sediment in the Southern California Bight","docAbstract":"The rivers of Southern California deliver episodic pulses of water, sediment, nutrients, and pollutants to the region's coastal waters. Although river-sediment dispersal is observed in positively buoyant (hypopycnal) turbid plumes extending tens of kilometers from river mouths, very little of the river sediment is found in these plumes. Rather, river sediment settles quickly from hypopycnal plumes to the seabed, where transport is controlled by bottom-boundary layer processes, presumably including fluid-mud (hyperpycnal) gravity currents. Here we investigate the geographical patterns of river-sediment dispersal processes by examining suspended-sediment concentrations and loads and the continental shelf morphology offshore river mouths. Throughout Southern California, river sediment is discharged at concentrations adequately high to induce enhanced sediment settling, including negative buoyancy. The rivers draining the Western Transverse Range produce suspended-sediment concentrations that are orders of magnitude greater than those in the urbanized region and Peninsular Range to the south, largely due to differences in sediment yield. The majority of sediment discharge from the Santa Clara River and Calleguas Creek occurs above the theoretical negative buoyancy concentration (>40 g/l). These rivers also produce event sediment loading as great as the Eel River, where fluid-mud gravity currents are observed. The continental shelf of Southern California has variable morphology, which influences the ability to transport via gravity currents. Over half of the rivers examined are adjacent to shelf slopes greater than 0.01, which are adequately steep to sustain auto-suspending gravity currents across the shelf, and have little (<10 m) Holocene sediment accumulation. Shelf settings of the Ventura, Santa Clara, and Tijuana Rivers are very broad and low sloped (less than 0.004), which suggests that fluid-mud gravity currents could transport across these shelves, albeit slowly (??10 cm/s) and only with adequate wave-generated shear stress and sediment loading. Calleguas Creek is unique in that it discharges directly into a steepsloped canyon (greater than 0.1) that should allow for violent auto-suspending gravity currents. In light of this, only one shelf setting-the Santa Clara and Ventura-has considerable Holocene sediment accumulation (exceeding 60 m), and here we show that the morphology of this shelf is very similar to an equilibrium shape predicted by gravity-current sediment transport. Thus, we conclude that a wide distribution of river-shelf settings occur in the Southern California Bight, which will directly influence sediment dispersal processes-both dilute suspended and gravity-current transport-and sediment-accumulation patterns. ?? 2009 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2009.2454(2.3)","issn":"00721077","usgsCitation":"Warrick, J., and Farnsworth, K., 2009, Dispersal of river sediment in the Southern California Bight: Special Paper of the Geological Society of America, no. 454, p. 53-67, https://doi.org/10.1130/2009.2454(2.3).","startPage":"53","endPage":"67","numberOfPages":"15","costCenters":[],"links":[{"id":244606,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216720,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2454(2.3)"}],"issue":"454","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a021be4b0c8380cd4feb5","contributors":{"authors":[{"text":"Warrick, J.A.","contributorId":53503,"corporation":false,"usgs":true,"family":"Warrick","given":"J.A.","affiliations":[],"preferred":false,"id":444038,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Farnsworth, K.L.","contributorId":36746,"corporation":false,"usgs":true,"family":"Farnsworth","given":"K.L.","email":"","affiliations":[],"preferred":false,"id":444037,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}