A remote sensing approach permits for the first time the derivation of a map of the carbon dioxide concentration in a volcanic plume. The airborne imaging remote sensing overcomes the typical difficulties associated with the ground measurements and permits rapid and large views of the volcanic processes together with the measurements of volatile components exolving from craters. Hyperspectral images in the infrared range (1900–2100 nm), where carbon dioxide absorption lines are present, have been used. These images were acquired during an airborne campaign by the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) over the Pu`u` O`o Vent situated at the Kilauea East Rift zone, Hawaii. Using a radiative transfer model to simulate the measured up-welling spectral radiance and by applying the newly developed mapping technique, the carbon dioxide concentration map of the Pu`u` O`o Vent plume were obtained. The carbon dioxide integrated flux rate were calculated and a mean value of 396 ± 138 t d− 1 was obtained. This result is in agreement, within the measurements errors, with those of the ground measurements taken during the airborne campaign. 2008 Elsevier Inc.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.rse.2008.03.010","issn":"00344257","usgsCitation":"Spinetti, C., Carrere, V., Buongiorno, M.F., Sutton, A.J., and Elias, T., 2008, Carbon dioxide of Pu`u`O`o volcanic plume at Kilauea retrieved by AVIRIS hyperspectral data: Remote Sensing of Environment, v. 112, no. 6, p. 3192-3199, https://doi.org/10.1016/j.rse.2008.03.010.","productDescription":"8 p.","startPage":"3192","endPage":"3199","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":241426,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213769,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.rse.2008.03.010"}],"volume":"112","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f361e4b0c8380cd4b775","contributors":{"authors":[{"text":"Spinetti, C.","contributorId":64899,"corporation":false,"usgs":true,"family":"Spinetti","given":"C.","affiliations":[],"preferred":false,"id":437778,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carrere, V.","contributorId":31212,"corporation":false,"usgs":true,"family":"Carrere","given":"V.","affiliations":[],"preferred":false,"id":437777,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Buongiorno, M. Fabrizia","contributorId":102698,"corporation":false,"usgs":true,"family":"Buongiorno","given":"M.","email":"","middleInitial":"Fabrizia","affiliations":[],"preferred":false,"id":437780,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sutton, A. J. 0000-0003-1902-3977","orcid":"https://orcid.org/0000-0003-1902-3977","contributorId":28983,"corporation":false,"usgs":true,"family":"Sutton","given":"A.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":437776,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Elias, T. 0000-0002-9592-4518","orcid":"https://orcid.org/0000-0002-9592-4518","contributorId":71195,"corporation":false,"usgs":true,"family":"Elias","given":"T.","affiliations":[],"preferred":false,"id":437779,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70032743,"text":"70032743 - 2008 - A consistent framework for Horton regression statistics that leads to a modified Hack's law","interactions":[],"lastModifiedDate":"2012-03-12T17:21:32","indexId":"70032743","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1801,"text":"Geomorphology","active":true,"publicationSubtype":{"id":10}},"title":"A consistent framework for Horton regression statistics that leads to a modified Hack's law","docAbstract":"A statistical framework is introduced that resolves important problems with the interpretation and use of traditional Horton regression statistics. The framework is based on a univariate regression model that leads to an alternative expression for Horton ratio, connects Horton regression statistics to distributional simple scaling, and improves the accuracy in estimating Horton plot parameters. The model is used to examine data for drainage area A and mainstream length L from two groups of basins located in different physiographic settings. Results show that confidence intervals for the Horton plot regression statistics are quite wide. Nonetheless, an analysis of covariance shows that regression intercepts, but not regression slopes, can be used to distinguish between basin groups. The univariate model is generalized to include n > 1 dependent variables. For the case where the dependent variables represent ln A and ln L, the generalized model performs somewhat better at distinguishing between basin groups than two separate univariate models. The generalized model leads to a modification of Hack's law where L depends on both A and Strahler order ??. Data show that ?? plays a statistically significant role in the modified Hack's law expression. ?? 2008 Elsevier B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geomorphology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.geomorph.2008.06.002","issn":"01695","usgsCitation":"Furey, P., and Troutman, B., 2008, A consistent framework for Horton regression statistics that leads to a modified Hack's law: Geomorphology, v. 102, no. 3-4, p. 603-614, https://doi.org/10.1016/j.geomorph.2008.06.002.","startPage":"603","endPage":"614","numberOfPages":"12","costCenters":[],"links":[{"id":214050,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.geomorph.2008.06.002"},{"id":241737,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"102","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e396e4b0c8380cd460fc","contributors":{"authors":[{"text":"Furey, P.R.","contributorId":11015,"corporation":false,"usgs":true,"family":"Furey","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":437706,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Troutman, B.M.","contributorId":73638,"corporation":false,"usgs":true,"family":"Troutman","given":"B.M.","email":"","affiliations":[],"preferred":false,"id":437707,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70032739,"text":"70032739 - 2008 - Predicted effects of proposed new regulation plans on sedge/grass meadows of Lake Ontario","interactions":[],"lastModifiedDate":"2012-03-12T17:21:22","indexId":"70032739","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Predicted effects of proposed new regulation plans on sedge/grass meadows of Lake Ontario","docAbstract":"Previously described models for predicting the percent of Lake Ontario wetlands that would be occupied by sedge/grass-dominated meadow marsh were used to test four proposed new plans for regulation of lake levels and to make comparisons with the current plan and unregulated conditions. The models for drowned river mouth, barrier beach, open embayment, and protected embayment wetlands assessed responses to lake levels that would be generated by each plan under net total supplies modified from those that occurred from1900 to 2000. In years when reduced supplies would allow meadow marsh regeneration, simulated unregulated lake levels produced the most meadow marsh in all wetland geomorphic types; current Plan 1958DD produced the least. Overall predicted percent meadow marsh under the test plans decreased in the order B+, 2007, D+, and A+, and the latter three plans produced rather similar results in many cases. Lower percentages of meadow marsh under some plans were due to insufficient low lake levels that could allow soils to dry and restrict invasion by cattails, as well as lack of periodic high lake levels that could kill invading upland plants. An assessment of seasonal lake-level characteristics demonstrated that Plan 2007 would reduce mean winter lake levels by 13 cm or more than Plan B+ and springtime lake levels by more than 10 cm. These seasonal differences could result in less winter habitat for muskrats and reduced access to spring spawning habitats for fish such as northern pike. Our model results provide important information for use in the process of selecting a new regulation plan for Lake Ontario.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Great Lakes Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.3394/0380-1330-34.4.745","issn":"03801","usgsCitation":"Wilcox, D., and Xie, Y., 2008, Predicted effects of proposed new regulation plans on sedge/grass meadows of Lake Ontario: Journal of Great Lakes Research, v. 34, no. 4, p. 745-754, https://doi.org/10.3394/0380-1330-34.4.745.","startPage":"745","endPage":"754","numberOfPages":"10","costCenters":[],"links":[{"id":476730,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://hdl.handle.net/20.500.12648/2268","text":"External Repository"},{"id":241697,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214012,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330-34.4.745"}],"volume":"34","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8191e4b0c8380cd7b5c9","contributors":{"authors":[{"text":"Wilcox, D.A.","contributorId":55382,"corporation":false,"usgs":true,"family":"Wilcox","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":437694,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Xie, Y.","contributorId":107917,"corporation":false,"usgs":true,"family":"Xie","given":"Y.","email":"","affiliations":[],"preferred":false,"id":437695,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70032687,"text":"70032687 - 2008 - Evaluation of MODIS NDVI and NDWI for vegetation drought monitoring using Oklahoma Mesonet soil moisture data","interactions":[],"lastModifiedDate":"2018-02-21T12:57:18","indexId":"70032687","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of MODIS NDVI and NDWI for vegetation drought monitoring using Oklahoma Mesonet soil moisture data","docAbstract":"The evaluation of the relationship between satellite-derived vegetation indices (normalized difference vegetation index and normalized difference water index) and soil moisture improves our understanding of how these indices respond to soil moisture fluctuations. Soil moisture deficits are ultimately tied to drought stress on plants. The diverse terrain and climate of Oklahoma, the extensive soil moisture network of the Oklahoma Mesonet, and satellite-derived indices from the Moderate Resolution Imaging Spectroradiometer (MODIS) provided an opportunity to study correlations between soil moisture and vegetation indices over the 2002-2006 growing seasons. Results showed that the correlation between both indices and the fractional water index (FWI) was highly dependent on land cover heterogeneity and soil type. Sites surrounded by relatively homogeneous vegetation cover with silt loam soils had the highest correlation between the FWI and both vegetation-related indices (r???0.73), while sites with heterogeneous vegetation cover and loam soils had the lowest correlation (r???0.22). Copyright 2008 by the American Geophysical Union.","language":"English","publisher":"AGU Publications","doi":"10.1029/2008GL035772","usgsCitation":"Gu, Y., Hunt, E., Wardlow, B., Basara, J., Brown, J.F., and Verdin, J., 2008, Evaluation of MODIS NDVI and NDWI for vegetation drought monitoring using Oklahoma Mesonet soil moisture data: Geophysical Research Letters, v. 35, no. 22, p. 1-5, https://doi.org/10.1029/2008GL035772.","productDescription":"L22401: 5 p.","startPage":"1","endPage":"5","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":476805,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2008gl035772","text":"Publisher Index Page"},{"id":241389,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213733,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2008GL035772"}],"volume":"35","issue":"22","noUsgsAuthors":false,"publicationDate":"2008-11-18","publicationStatus":"PW","scienceBaseUri":"505a0c18e4b0c8380cd52a2a","contributors":{"authors":[{"text":"Gu, Yingxin 0000-0002-3544-1856 ygu@usgs.gov","orcid":"https://orcid.org/0000-0002-3544-1856","contributorId":139586,"corporation":false,"usgs":true,"family":"Gu","given":"Yingxin","email":"ygu@usgs.gov","affiliations":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true},{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":true,"id":437449,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hunt, E.","contributorId":66926,"corporation":false,"usgs":true,"family":"Hunt","given":"E.","affiliations":[],"preferred":false,"id":437454,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wardlow, B.","contributorId":56863,"corporation":false,"usgs":false,"family":"Wardlow","given":"B.","email":"","affiliations":[{"id":12505,"text":"University of Nebraska - Lincoln","active":true,"usgs":false}],"preferred":false,"id":437453,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Basara, J.B.","contributorId":49188,"corporation":false,"usgs":true,"family":"Basara","given":"J.B.","email":"","affiliations":[],"preferred":false,"id":437452,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Brown, Jesslyn F. 0000-0002-9976-1998 jfbrown@usgs.gov","orcid":"https://orcid.org/0000-0002-9976-1998","contributorId":3241,"corporation":false,"usgs":true,"family":"Brown","given":"Jesslyn","email":"jfbrown@usgs.gov","middleInitial":"F.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":false,"id":437450,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Verdin, J. P. 0000-0003-0238-9657","orcid":"https://orcid.org/0000-0003-0238-9657","contributorId":33033,"corporation":false,"usgs":true,"family":"Verdin","given":"J. P.","affiliations":[],"preferred":false,"id":437451,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70032626,"text":"70032626 - 2008 - Diagnosis of an intense atmospheric river impacting the pacific northwest: Storm summary and offshore vertical structure observed with COSMIC satellite retrievals","interactions":[],"lastModifiedDate":"2012-03-12T17:21:23","indexId":"70032626","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2786,"text":"Monthly Weather Review","active":true,"publicationSubtype":{"id":10}},"title":"Diagnosis of an intense atmospheric river impacting the pacific northwest: Storm summary and offshore vertical structure observed with COSMIC satellite retrievals","docAbstract":"This study uses the new satellite-based Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) mission to retrieve tropospheric profiles of temperature and moisture over the data-sparse eastern Pacific Ocean. The COSMIC retrievals, which employ a global positioning system radio occultation technique combined with \"first-guess\" information from numerical weather prediction model analyses, are evaluated through the diagnosis of an intense atmospheric river (AR; i.e., a narrow plume of strong water vapor flux) that devastated the Pacific Northwest with flooding rains in early November 2006. A detailed analysis of this AR is presented first using conventional datasets and highlights the fact that ARs are critical contributors to West Coast extreme precipitation and flooding events. Then, the COSMIC evaluation is provided. Offshore composite COSMIC soundings north of, within, and south of this AR exhibited vertical structures that are meteorologically consistent with satellite imagery and global reanalysis fields of this case and with earlier composite dropsonde results from other landfalling ARs. Also, a curtain of 12 offshore COSMIC soundings through the AR yielded cross-sectional thermodynamic and moisture structures that were similarly consistent, including details comparable to earlier aircraft-based dropsonde analyses. The results show that the new COSMIC retrievals, which are global (currently yielding ???2000 soundings per day), provide high-resolution vertical-profile information beyond that found in the numerical model first-guess fields and can help monitor key lower-tropospheric mesoscale phenomena in data-sparse regions. Hence, COSMIC will likely support a wide array of applications, from physical process studies to data assimilation, numerical weather prediction, and climate research. ?? 2008 American Meteorological Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Monthly Weather Review","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1175/2008MWR2550.1","issn":"00270","usgsCitation":"Neiman, P., Ralph, F., Wick, G., Kuo, Y., Wee, T., Ma, Z., Taylor, G., and Dettinger, M.D., 2008, Diagnosis of an intense atmospheric river impacting the pacific northwest: Storm summary and offshore vertical structure observed with COSMIC satellite retrievals: Monthly Weather Review, v. 136, no. 11, p. 4398-4420, https://doi.org/10.1175/2008MWR2550.1.","startPage":"4398","endPage":"4420","numberOfPages":"23","costCenters":[],"links":[{"id":213825,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1175/2008MWR2550.1"},{"id":241486,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"136","issue":"11","noUsgsAuthors":false,"publicationDate":"2008-11-01","publicationStatus":"PW","scienceBaseUri":"505a009ce4b0c8380cd4f80a","contributors":{"authors":[{"text":"Neiman, P.J.","contributorId":14991,"corporation":false,"usgs":true,"family":"Neiman","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":437108,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ralph, F.M.","contributorId":39174,"corporation":false,"usgs":true,"family":"Ralph","given":"F.M.","email":"","affiliations":[],"preferred":false,"id":437111,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wick, G.A.","contributorId":22958,"corporation":false,"usgs":true,"family":"Wick","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":437109,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kuo, Y.-H.","contributorId":104716,"corporation":false,"usgs":true,"family":"Kuo","given":"Y.-H.","email":"","affiliations":[],"preferred":false,"id":437115,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wee, T.-K.","contributorId":49989,"corporation":false,"usgs":true,"family":"Wee","given":"T.-K.","email":"","affiliations":[],"preferred":false,"id":437112,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ma, Z.","contributorId":25288,"corporation":false,"usgs":true,"family":"Ma","given":"Z.","email":"","affiliations":[],"preferred":false,"id":437110,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Taylor, G.H.","contributorId":85158,"corporation":false,"usgs":true,"family":"Taylor","given":"G.H.","email":"","affiliations":[],"preferred":false,"id":437113,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Dettinger, M. D. 0000-0002-7509-7332","orcid":"https://orcid.org/0000-0002-7509-7332","contributorId":93069,"corporation":false,"usgs":false,"family":"Dettinger","given":"M.","middleInitial":"D.","affiliations":[{"id":16196,"text":"Scripps Institution of Oceanography, La Jolla, CA","active":true,"usgs":false}],"preferred":false,"id":437114,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70030383,"text":"70030383 - 2008 - Assessing sulfate reduction and methane cycling in a high salinity pore water system in the northern Gulf of Mexico","interactions":[],"lastModifiedDate":"2017-08-16T11:07:00","indexId":"70030383","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2682,"text":"Marine and Petroleum Geology","active":true,"publicationSubtype":{"id":10}},"title":"Assessing sulfate reduction and methane cycling in a high salinity pore water system in the northern Gulf of Mexico","docAbstract":"Pore waters extracted from 18 piston cores obtained on and near a salt-cored bathymetric high in Keathley Canyon lease block 151 in the northern Gulf of Mexico contain elevated concentrations of chloride (up to 838 mM) and have pore water chemical concentration profiles that exhibit extensive departures (concavity) from steady-state (linear) diffusive equilibrium with depth. Minimum ??13C dissolved inorganic carbon (DIC) values of -55.9??? to -64.8??? at the sulfate-methane transition (SMT) strongly suggest active anaerobic oxidation of methane (AOM) throughout the study region. However, the nonlinear pore water chemistry-depth profiles make it impossible to determine the vertical extent of active AOM or the potential role of alternate sulfate reduction pathways. Here we utilize the conservative (non-reactive) nature of dissolved chloride to differentiate the effects of biogeochemical activity (e.g., AOM and/or organoclastic sulfate reduction) relative to physical mixing in high salinity Keathley Canyon sediments. In most cases, the DIC and sulfate concentrations in pore waters are consistent with a conservative mixing model that uses chloride concentrations at the seafloor and the SMT as endmembers. Conservative mixing of pore water constituents implies that an undetermined physical process is primarily responsible for the nonlinearity of the pore water-depth profiles. In limited cases where the sulfate and DIC concentrations deviated from conservative mixing between the seafloor and SMT, the ??13C-DIC mixing diagrams suggest that the excess DIC is produced from a 13C-depleted source that could only be accounted for by microbial methane, the dominant form of methane identified during this study. We conclude that AOM is the most prevalent sink for sulfate and that it occurs primarily at the SMT at this Keathley Canyon site.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine and Petroleum Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.marpetgeo.2008.01.016","issn":"02648","usgsCitation":"Pohlman, J., Ruppel, C., Hutchinson, D.R., Downer, R., and Coffin, R., 2008, Assessing sulfate reduction and methane cycling in a high salinity pore water system in the northern Gulf of Mexico: Marine and Petroleum Geology, v. 25, no. 9, p. 942-951, https://doi.org/10.1016/j.marpetgeo.2008.01.016.","productDescription":"10 p.","startPage":"942","endPage":"951","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":476682,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/1912/2618","text":"External Repository"},{"id":239268,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211892,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.marpetgeo.2008.01.016"}],"volume":"25","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ede3e4b0c8380cd49aa1","contributors":{"authors":[{"text":"Pohlman, J. W. 0000-0002-3563-4586","orcid":"https://orcid.org/0000-0002-3563-4586","contributorId":38362,"corporation":false,"usgs":true,"family":"Pohlman","given":"J. W.","affiliations":[],"preferred":false,"id":426937,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ruppel, C.","contributorId":82050,"corporation":false,"usgs":true,"family":"Ruppel","given":"C.","email":"","affiliations":[],"preferred":false,"id":426939,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hutchinson, D. R.","contributorId":31770,"corporation":false,"usgs":true,"family":"Hutchinson","given":"D.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":426936,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Downer, R.","contributorId":10524,"corporation":false,"usgs":true,"family":"Downer","given":"R.","email":"","affiliations":[],"preferred":false,"id":426935,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Coffin, R.B.","contributorId":59628,"corporation":false,"usgs":true,"family":"Coffin","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":426938,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70030384,"text":"70030384 - 2008 - Seismic and acoustic recordings of an unusually large rockfall at Mount St. Helens, Washington","interactions":[],"lastModifiedDate":"2019-03-21T17:39:45","indexId":"70030384","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Seismic and acoustic recordings of an unusually large rockfall at Mount St. Helens, Washington","docAbstract":"On 29 May 2006 a large rockfall off the Mount St. Helens lava dome produced an atmospheric plume that was reported by airplane pilots to have risen to 6,000 m above sea level and interpreted to be a result of an explosive event. However, subsequent field reconnaissance found no evidence of a ballistic field, indicating that there was no explosive component. The rockfall produced complex seismic and infrasonic signals, with the latter recorded at sites 0.6 and 13.4 km from the source. An unusual, very long-period (50 s) infrasonic signal was recorded, a signal we model as the result of air displacement. Two high-frequency infrasonic signals are inferred to result from the initial contact of a rock slab with the ground and from interaction of displaced air with a depression at the base of the active lava dome.
","language":"English","publisher":"AGU","doi":"10.1029/2008GL035176","issn":"00948","usgsCitation":"Moran, S.C., Matoza, R., Garces, M., Hedlin, M., Bowers, D., Scott, W.E., Sherrod, D.R., and Vallance, J.W., 2008, Seismic and acoustic recordings of an unusually large rockfall at Mount St. Helens, Washington: Geophysical Research Letters, v. 35, no. 19, p. 1-6, https://doi.org/10.1029/2008GL035176.","productDescription":"L19302; 6 p.","startPage":"1","endPage":"6","numberOfPages":"6","ipdsId":"IP-007301","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true},{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":486866,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2008gl035176","text":"Publisher Index Page"},{"id":239269,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211893,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2008GL035176"}],"volume":"35","issue":"19","noUsgsAuthors":false,"publicationDate":"2008-10-02","publicationStatus":"PW","scienceBaseUri":"505b8aede4b08c986b317487","contributors":{"authors":[{"text":"Moran, Seth C. 0000-0001-7308-9649 smoran@usgs.gov","orcid":"https://orcid.org/0000-0001-7308-9649","contributorId":548,"corporation":false,"usgs":true,"family":"Moran","given":"Seth","email":"smoran@usgs.gov","middleInitial":"C.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true},{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"preferred":true,"id":426946,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Matoza, R.S.","contributorId":31977,"corporation":false,"usgs":true,"family":"Matoza","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":426942,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Garces, M.A.","contributorId":86563,"corporation":false,"usgs":true,"family":"Garces","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":426947,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hedlin, M.A.H.","contributorId":58094,"corporation":false,"usgs":true,"family":"Hedlin","given":"M.A.H.","email":"","affiliations":[],"preferred":false,"id":426945,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bowers, D.","contributorId":9457,"corporation":false,"usgs":true,"family":"Bowers","given":"D.","email":"","affiliations":[],"preferred":false,"id":426940,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Scott, William E. 0000-0001-8156-979X wescott@usgs.gov","orcid":"https://orcid.org/0000-0001-8156-979X","contributorId":1725,"corporation":false,"usgs":true,"family":"Scott","given":"William","email":"wescott@usgs.gov","middleInitial":"E.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":426941,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Sherrod, David R. 0000-0001-9460-0434 dsherrod@usgs.gov","orcid":"https://orcid.org/0000-0001-9460-0434","contributorId":527,"corporation":false,"usgs":true,"family":"Sherrod","given":"David","email":"dsherrod@usgs.gov","middleInitial":"R.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":426943,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Vallance, James W. 0000-0002-3083-5469 jvallance@usgs.gov","orcid":"https://orcid.org/0000-0002-3083-5469","contributorId":547,"corporation":false,"usgs":true,"family":"Vallance","given":"James","email":"jvallance@usgs.gov","middleInitial":"W.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":426944,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70030414,"text":"70030414 - 2008 - Demographic analysis of Lost River sucker and shortnose sucker populations in Upper Klamath Lake, Oregon","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030414","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3624,"text":"Transactions of the American Fisheries Society","active":true,"publicationSubtype":{"id":10}},"title":"Demographic analysis of Lost River sucker and shortnose sucker populations in Upper Klamath Lake, Oregon","docAbstract":"We used 13 years (1995-2007) of capture-mark-recapture data to assess population dynamics of endangered Lost River suckers Deltistes luxatus and shortnose suckers Chasmistes brevirostris in Upper Klamath Lake, Oregon. The Cormack-Jolly-Seber method was used to estimate survival, and information theoretic modeling was used to assess variation due to time, gender, species, and spawning subpopulations. Length data were used to detect multiple year-class failures and events of high recruitment into adult spawning populations. Average annual survival probability was 0.88 for Lost River suckers and 0.76 for shortnose suckers. Mean life span estimates based on these survival rates indicated that Lost River suckers survived long enough on average to attempt reproduction eight times, whereas shortnose suckers only survived to spawn three to four times. Shortnose sucker survival was not only poor in years of fish kills (1995-1997) but also was low in years without fish kills (i.e., 2002 and 2004). This suggests that high mortality occurs in some years but is not necessarily associated with fish kills. Annual survival probabilities were not only different between the two species but also differed between two spawning subpopulations of Lost River suckers. Length composition data indicated that recruitment into spawning populations only occurred intermittently. Populations of both species transitioned from primarily old individuals with little size diversity and consistently poor recruitment in the late 1980s and early 1990s to mostly small, recruit-sized fish by the late 1990s. A better understanding of the factors influencing adult survival and recruitment into spawning populations is needed. Monitoring these vital parameters will provide a quantitative means to evaluate population status and assess the effectiveness of conservation and recovery efforts.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Transactions of the American Fisheries Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/T06-235.1","issn":"00028","usgsCitation":"Janney, E., Shively, R., Hayes, B., Barry, P., and Perkins, D., 2008, Demographic analysis of Lost River sucker and shortnose sucker populations in Upper Klamath Lake, Oregon: Transactions of the American Fisheries Society, v. 137, no. 6, p. 1812-1825, https://doi.org/10.1577/T06-235.1.","startPage":"1812","endPage":"1825","numberOfPages":"14","costCenters":[],"links":[{"id":211834,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/T06-235.1"},{"id":239204,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"137","issue":"6","noUsgsAuthors":false,"publicationDate":"2011-01-09","publicationStatus":"PW","scienceBaseUri":"5059fe7de4b0c8380cd4ed5a","contributors":{"authors":[{"text":"Janney, E.C.","contributorId":43955,"corporation":false,"usgs":true,"family":"Janney","given":"E.C.","affiliations":[],"preferred":false,"id":427054,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shively, R.S.","contributorId":79642,"corporation":false,"usgs":true,"family":"Shively","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":427055,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hayes, B.S.","contributorId":34721,"corporation":false,"usgs":true,"family":"Hayes","given":"B.S.","email":"","affiliations":[],"preferred":false,"id":427053,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Barry, P.M.","contributorId":31574,"corporation":false,"usgs":true,"family":"Barry","given":"P.M.","email":"","affiliations":[],"preferred":false,"id":427052,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Perkins, D.","contributorId":83589,"corporation":false,"usgs":true,"family":"Perkins","given":"D.","affiliations":[],"preferred":false,"id":427056,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70030513,"text":"70030513 - 2008 - Soil sail content estimation in the Yellow River delta with satellite hyperspectral data","interactions":[],"lastModifiedDate":"2020-09-10T16:50:41.322664","indexId":"70030513","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1175,"text":"Canadian Journal of Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"Soil sail content estimation in the Yellow River delta with satellite hyperspectral data","docAbstract":"Soil salinization is one of the most common land degradation processes and is a severe environmental hazard. The primary objective of this study is to investigate the potential of predicting salt content in soils with hyperspectral data acquired with EO-1 Hyperion. Both partial least-squares regression (PLSR) and conventional multiple linear regression (MLR), such as stepwise regression (SWR), were tested as the prediction model. PLSR is commonly used to overcome the problem caused by high-dimensional and correlated predictors. Chemical analysis of 95 samples collected from the top layer of soils in the Yellow River delta area shows that salt content was high on average, and the dominant chemicals in the saline soil were NaCl and MgCl2. Multivariate models were established between soil contents and hyperspectral data. Our results indicate that the PLSR technique with laboratory spectral data has a strong prediction capacity. Spectral bands at 1487–1527, 1971–1991, 2032–2092, and 2163–2355 nm possessed large absolute values of regression coefficients, with the largest coefficient at 2203 nm. We obtained a root mean squared error (RMSE) for calibration (with 61 samples) of RMSEC = 0.753 (R2 = 0.893) and a root mean squared error for validation (with 30 samples) of RMSEV = 0.574. The prediction model was applied on a pixel-by-pixel basis to a Hyperion reflectance image to yield a quantitative surface distribution map of soil salt content. The result was validated successfully from 38 sampling points. We obtained an RMSE estimate of 1.037 (R2 = 0.784) for the soil salt content map derived by the PLSR model. The salinity map derived from the SWR model shows that the predicted value is higher than the true value. These results demonstrate that the PLSR method is a more suitable technique than stepwise regression for quantitative estimation of soil salt content in a large area.
","language":"English","publisher":"Taylor & Francis","usgsCitation":"Weng, Y., Gong, P., and Zhu, Z., 2008, Soil sail content estimation in the Yellow River delta with satellite hyperspectral data: Canadian Journal of Remote Sensing, v. 34, no. 3, p. 259-270.","productDescription":"12 p.","startPage":"259","endPage":"270","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":239105,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":378314,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://www.tandfonline.com/doi/abs/10.5589/m08-017"}],"volume":"34","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9218e4b08c986b319ccd","contributors":{"authors":[{"text":"Weng, Yongling","contributorId":64767,"corporation":false,"usgs":true,"family":"Weng","given":"Yongling","email":"","affiliations":[],"preferred":false,"id":427436,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gong, Peng","contributorId":102393,"corporation":false,"usgs":true,"family":"Gong","given":"Peng","affiliations":[],"preferred":false,"id":427435,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhu, Zhi-Liang zzhu@usgs.gov","contributorId":3636,"corporation":false,"usgs":true,"family":"Zhu","given":"Zhi-Liang","email":"zzhu@usgs.gov","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":false,"id":427434,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70030515,"text":"70030515 - 2008 - Mantle structure beneath the western edge of the Colorado Plateau","interactions":[],"lastModifiedDate":"2019-04-03T14:03:49","indexId":"70030515","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Mantle structure beneath the western edge of the Colorado Plateau","docAbstract":"Teleseismic traveltime data are inverted for mantle Vp and Vs variations beneath a 1400 km long line of broadband seismometers extending from eastern New Mexico to western Utah. The model spans 600 km beneath the moho with resolution of ~50 km. Inversions show a sharp, large-magnitude velocity contrast across the Colorado Plateau-Great Basin transition extending ~200 km below the crust. Also imaged is a fast anomaly 300 to 600 km beneath the NW portion of the array. Very slow velocities beneath the Great Basin imply partial melting and/or anomalously wet mantle. We propose that the sharp contrast in mantle velocities across the western edge of the Plateau corresponds to differential lithospheric modification, during and following Farallon subduction, across a boundary defining the western extent of unmodified Proterozoic mantle lithosphere. The deep fast anomaly corresponds to thickened Farallon plate or detached continental lithosphere at transition zone depths. Copyright 2008 by the American Geophysical Union.
","language":"English","publisher":"AGU","doi":"10.1029/2008GL033391","issn":"00948","usgsCitation":"Sine, C., Wilson, D., Gao, W., Grand, S., Aster, R., Ni, J., and Baldridge, W., 2008, Mantle structure beneath the western edge of the Colorado Plateau: Geophysical Research Letters, v. 35, no. 10, https://doi.org/10.1029/2008GL033391.","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":239139,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211785,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2008GL033391"}],"volume":"35","issue":"10","noUsgsAuthors":false,"publicationDate":"2008-05-20","publicationStatus":"PW","scienceBaseUri":"505a4cd8e4b0c8380cd69f39","contributors":{"authors":[{"text":"Sine, C.R.","contributorId":34720,"corporation":false,"usgs":true,"family":"Sine","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":427454,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, D.","contributorId":30353,"corporation":false,"usgs":true,"family":"Wilson","given":"D.","affiliations":[],"preferred":false,"id":427453,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gao, W.","contributorId":42031,"corporation":false,"usgs":true,"family":"Gao","given":"W.","email":"","affiliations":[],"preferred":false,"id":427455,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Grand, S.P.","contributorId":22965,"corporation":false,"usgs":true,"family":"Grand","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":427452,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Aster, R.","contributorId":84153,"corporation":false,"usgs":true,"family":"Aster","given":"R.","affiliations":[],"preferred":false,"id":427457,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ni, J.","contributorId":105120,"corporation":false,"usgs":true,"family":"Ni","given":"J.","email":"","affiliations":[],"preferred":false,"id":427458,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Baldridge, W.S.","contributorId":63956,"corporation":false,"usgs":true,"family":"Baldridge","given":"W.S.","affiliations":[],"preferred":false,"id":427456,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70030546,"text":"70030546 - 2008 - Probabilistic seismic hazard in the San Francisco Bay area based on a simplified viscoelastic cycle model of fault interactions","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70030546","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Probabilistic seismic hazard in the San Francisco Bay area based on a simplified viscoelastic cycle model of fault interactions","docAbstract":"We construct a viscoelastic cycle model of plate boundary deformation that includes the effect of time-dependent interseismic strain accumulation, coseismic strain release, and viscoelastic relaxation of the substrate beneath the seismogenic crust. For a given fault system, time-averaged stress changes at any point (not on a fault) are constrained to zero; that is, kinematic consistency is enforced for the fault system. The dates of last rupture, mean recurrence times, and the slip distributions of the (assumed) repeating ruptures are key inputs into the viscoelastic cycle model. This simple formulation allows construction of stress evolution at all points in the plate boundary zone for purposes of probabilistic seismic hazard analysis (PSHA). Stress evolution is combined with a Coulomb failure stress threshold at representative points on the fault segments to estimate the times of their respective future ruptures. In our PSHA we consider uncertainties in a four-dimensional parameter space: the rupture peridocities, slip distributions, time of last earthquake (for prehistoric ruptures) and Coulomb failure stress thresholds. We apply this methodology to the San Francisco Bay region using a recently determined fault chronology of area faults. Assuming single-segment rupture scenarios, we find that fature rupture probabilities of area faults in the coming decades are the highest for the southern Hayward, Rodgers Creek, and northern Calaveras faults. This conclusion is qualitatively similar to that of Working Group on California Earthquake Probabilities, but the probabilities derived here are significantly higher. Given that fault rupture probabilities are highly model-dependent, no single model should be used to assess to time-dependent rupture probabilities. We suggest that several models, including the present one, be used in a comprehensive PSHA methodology, as was done by Working Group on California Earthquake Probabilities.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research B: Solid Earth","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007JB005227","issn":"01480","usgsCitation":"Pollitz, F., and Schwartz, D.P., 2008, Probabilistic seismic hazard in the San Francisco Bay area based on a simplified viscoelastic cycle model of fault interactions: Journal of Geophysical Research B: Solid Earth, v. 113, no. 5, https://doi.org/10.1029/2007JB005227.","costCenters":[],"links":[{"id":476717,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007jb005227","text":"Publisher Index Page"},{"id":239595,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212156,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007JB005227"}],"volume":"113","issue":"5","noUsgsAuthors":false,"publicationDate":"2008-05-24","publicationStatus":"PW","scienceBaseUri":"505a8c9de4b0c8380cd7e7b6","contributors":{"authors":[{"text":"Pollitz, F. F.","contributorId":108280,"corporation":false,"usgs":true,"family":"Pollitz","given":"F. F.","affiliations":[],"preferred":false,"id":427598,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schwartz, David P. 0000-0001-5193-9200","orcid":"https://orcid.org/0000-0001-5193-9200","contributorId":52968,"corporation":false,"usgs":true,"family":"Schwartz","given":"David","middleInitial":"P.","affiliations":[],"preferred":false,"id":427597,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70035435,"text":"70035435 - 2008 - An evaluation of the evolution of the latest miocene to earliest pliocene bouse lake system in the lower Colorado river valley, southwestern USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:54","indexId":"70035435","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"An evaluation of the evolution of the latest miocene to earliest pliocene bouse lake system in the lower Colorado river valley, southwestern USA","docAbstract":"The upper Miocene to lower Pliocene Bouse Formation in the lower Colorado River trough of the American Southwest was deposited in three basins - from north to south, the Mohave, Havasu, and Blythe Basins - that were formed by extensional fault ing in the early to middle Miocene. Fossils of marine, brackish, and freshwater organ isms in the Bouse Formation have been interpreted to indicate an estuarine environment associated with early opening of the nearby Gulf of California. Regional uplift since 5 Ma is required to position the estuarine Bouse Formation at present elevations as high as 555 m, where greater uplift is required in the north. We present a compilation of Bouse Formation elevations that is consistent with Bouse deposition in lakes, with an abrupt 225 m northward increase in maximum Bouse elevations at Topock gorge north of Lake Havasu. Within Blythe and Havasu Basins, maximum Bouse elevations are 330 m above sea level in three widely spaced areas and reveal no evidence of regional tilting. To the north in Mohave Basin, numerous Bouse outcrops above 480 m elevation include three widely spaced sites where the Bouse Formation is exposed at 536-555 m. Numerical simulations of initial Colorado River inflow to a sequence of closed basins along the lower Colorado River corridor model a history of lake filling, spilling, evaporation and salt concentration, and outflow-channel incision. The simulations support the plausibility of evaporative concentration of Colorado River water to seawater-level salinities in Blythe Basin and indicate that such salinities could have remained stable for as long as 20-30 k.y. We infer that fossil marine organ isms in the Bouse Formation, restricted to the southern (Blythe) basin, reflect coloniza tion of a salty lake by a small number of species that were transported by birds.","largerWorkTitle":"Special Paper of the Geological Society of America","language":"English","doi":"10.1130/2008.2439(17)","issn":"00721077","usgsCitation":"Spencer, J., Pearthree, P., and House, P., 2008, An evaluation of the evolution of the latest miocene to earliest pliocene bouse lake system in the lower Colorado river valley, southwestern USA, in Special Paper of the Geological Society of America, no. 439, p. 375-390, https://doi.org/10.1130/2008.2439(17).","startPage":"375","endPage":"390","numberOfPages":"16","costCenters":[],"links":[{"id":243243,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215436,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2008.2439(17)"}],"issue":"439","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ea56e4b0c8380cd487c1","contributors":{"authors":[{"text":"Spencer, J.E.","contributorId":91542,"corporation":false,"usgs":true,"family":"Spencer","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":450664,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pearthree, P. A.","contributorId":77236,"corporation":false,"usgs":false,"family":"Pearthree","given":"P. A.","affiliations":[],"preferred":false,"id":450663,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"House, P.K.","contributorId":25755,"corporation":false,"usgs":true,"family":"House","given":"P.K.","email":"","affiliations":[],"preferred":false,"id":450662,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031737,"text":"70031737 - 2008 - Population structure and genetic diversity of black redhorse (Moxostoma duquesnei) in a highly fragmented watershed","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70031737","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1324,"text":"Conservation Genetics","active":true,"publicationSubtype":{"id":10}},"title":"Population structure and genetic diversity of black redhorse (Moxostoma duquesnei) in a highly fragmented watershed","docAbstract":"Dams have the potential to affect population size and connectivity, reduce genetic diversity, and increase genetic differences among isolated riverine fish populations. Previous research has reported adverse effects on the distribution and demographics of black redhorse (Moxostoma duquesnei), a threatened fish species in Canada. However, effects on genetic diversity and population structure are unknown. We used microsatellite DNA markers to assess the number of genetic populations in the Grand River (Ontario) and to test whether dams have resulted in a loss of genetic diversity and increased genetic differentiation among populations. Three hundred and seventy-seven individuals from eight Grand River sites were genotyped at eight microsatellite loci. Measures of genetic diversity were moderately high and not significantly different among populations; strong evidence of recent population bottlenecks was not detected. Pairwise FST and exact tests identified weak (global FST = 0.011) but statistically significant population structure, although little population structuring was detected using either genetic distances or an individual-based clustering method. Neither geographic distance nor the number of intervening dams were correlated with pairwise differences among populations. Tests for regional equilibrium indicate that Grand River populations were either in equilibrium between gene flow and genetic drift or that gene flow is more influential than drift. While studies on other species have identified strong dam-related effects on genetic diversity and population structure, this study suggests that barrier permeability, river fragment length and the ecological characteristics of affected species can counterbalance dam-related effects. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Conservation Genetics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10592-007-9367-2","issn":"15660621","usgsCitation":"Reid, S., Wilson, C., Mandrak, N., and Carl, L., 2008, Population structure and genetic diversity of black redhorse (Moxostoma duquesnei) in a highly fragmented watershed: Conservation Genetics, v. 9, no. 3, p. 531-546, https://doi.org/10.1007/s10592-007-9367-2.","startPage":"531","endPage":"546","numberOfPages":"16","costCenters":[],"links":[{"id":240154,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212638,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10592-007-9367-2"}],"volume":"9","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-07-07","publicationStatus":"PW","scienceBaseUri":"505a7d97e4b0c8380cd7a03b","contributors":{"authors":[{"text":"Reid, S.M.","contributorId":61550,"corporation":false,"usgs":true,"family":"Reid","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":432916,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, C.C.","contributorId":102987,"corporation":false,"usgs":true,"family":"Wilson","given":"C.C.","email":"","affiliations":[],"preferred":false,"id":432918,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mandrak, N.E.","contributorId":79301,"corporation":false,"usgs":true,"family":"Mandrak","given":"N.E.","affiliations":[],"preferred":false,"id":432917,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Carl, L.M.","contributorId":22478,"corporation":false,"usgs":true,"family":"Carl","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":432915,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031747,"text":"70031747 - 2008 - Hydrography and bottom boundary layer dynamics: Influence on inner shelf sediment mobility, Long Bay, North Carolina","interactions":[],"lastModifiedDate":"2016-11-30T11:06:22","indexId":"70031747","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","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":"Hydrography and bottom boundary layer dynamics: Influence on inner shelf sediment mobility, Long Bay, North Carolina","docAbstract":"This study examined the hydrography and bottom boundary-layer dynamics of two typical storm events affecting coastal North Carolina (NC); a hurricane and the passages of two small consecutive extratropical storms during November 2005. Two upward-looking 1200-kHz Acoustic Doppler Current Profilers (ADCP) were deployed on the inner shelf in northern Long Bay, NC at water depths of less than 15 m. Both instruments profiled the overlying water column in 0.35 in bins beginning at a height of 1.35 in above the bottom (mab). Simultaneous measurements of wind speed and direction, wave and current parameters, and acoustic backscatter were coupled with output from a bottom boundary layer (bbl) model to describe the hydrography and boundary layer conditions during each event. The bbl model also was used to quantify sediment transport in the boundary layer during each storm. Both study sites exhibited similar temporal variations in wave and current magnitude, however, wave heights during the November event were higher than waves associated with the hurricane. Near-bottom mean and subtidal currents, however, were of greater magnitude during the hurricane. Peak depth-integrated suspended sediment transport during the November event exceeded transport associated with the hurricane by 25-70%. Substantial spatial variations in sediment transport existed throughout both events. During both events, along-shelf sediment transport exceeded across-shelf transport and was related to the magnitude and direction of subtidal currents. Given the variations in sediment type across the bay, complex shoreline configuration, and local bathymetry, the sediment transport rates reported here are very site specific. However, the general hydrography associated with the two storms is representative of conditions across northern Long Bay. Since the beaches in the study area undergo frequent renourishment to counter the effects of beach erosion, the results of this study also are relevant to coastal management decision-making. Specifically, these issues include 1) identification of municipalities that should share the cost for renourishment given the likelihood for significant along-shelf sand movement and 2) appropriate timing of sand placement with respect to local climatology and sea-turtle nesting restrictions.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Southeastern Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00383678","usgsCitation":"Davis, L., Leonard, L., and Snedden, G., 2008, Hydrography and bottom boundary layer dynamics: Influence on inner shelf sediment mobility, Long Bay, North Carolina: Southeastern Geology, v. 45, no. 3, p. 97-109.","startPage":"97","endPage":"109","numberOfPages":"13","costCenters":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"links":[{"id":239807,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"North Carolina","volume":"45","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3501e4b0c8380cd5fbcc","contributors":{"authors":[{"text":"Davis, L.A.","contributorId":29639,"corporation":false,"usgs":true,"family":"Davis","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":432951,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Leonard, L.A.","contributorId":22582,"corporation":false,"usgs":true,"family":"Leonard","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":432950,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Snedden, G.A. 0000-0001-7821-3709","orcid":"https://orcid.org/0000-0001-7821-3709","contributorId":37535,"corporation":false,"usgs":true,"family":"Snedden","given":"G.A.","affiliations":[],"preferred":false,"id":432952,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70176654,"text":"70176654 - 2008 - Ecosystem conceptual model- Mercury ","interactions":[],"lastModifiedDate":"2016-09-23T15:28:47","indexId":"70176654","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"title":"Ecosystem conceptual model- Mercury ","docAbstract":"