{"pageNumber":"597","pageRowStart":"14900","pageSize":"25","recordCount":46681,"records":[{"id":70173719,"text":"70173719 - 2012 - Rock fall dynamics and deposition: an integrated analysis of the 2009 Ahwiyah Point rock fall, Yosemite National Park, USA.","interactions":[],"lastModifiedDate":"2016-06-08T11:55:02","indexId":"70173719","displayToPublicDate":"2015-08-25T17:15:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1425,"text":"Earth Surface Processes and Landforms","active":true,"publicationSubtype":{"id":10}},"title":"Rock fall dynamics and deposition: an integrated analysis of the 2009 Ahwiyah Point rock fall, Yosemite National Park, USA.","docAbstract":"<p>We analyzed a combination of airborne and terrestrial LiDAR, high-resolution photography, seismic, and acoustic data in order to gain insights into the initiation, dynamics, and talus deposition of a complex rock fall. A large (46 700&thinsp;m3) rock fall originated from near Ahwiyah Point in eastern Yosemite Valley and fell a total of 730&thinsp;m to the valley floor on 28 March 2009. Analyses of remote sensing, seismic, and acoustic data were integrated to reconstruct the rock fall, which consisted of (1) the triggering of a 25 400&thinsp;m3 rock block in an area of intersecting and sometimes highly weathered joint planes, (2) the sliding and subsequent ballistic trajectory of the block from a steeply dipping ledge, (3) dislodging of additional rock from the cliff surface from beneath the rock fall source area, (4) a mid-cliff ledge impact that detached a volume of rock nearly equivalent in volume to the initial block, (5) sliding of the deteriorating rock mass down the remainder of the cliff, and (6) final impact at the base of the cliff that remobilized the existing talus downward and outward and produced an airblast that knocked down hundreds of trees. The depositional geomorphology indicates that the porosity of the fresh talus is significantly lower than that expected for typical blocky talus slopes, likely because the rock debris from this event was pulverized into smaller, more poorly sorted fragments and densified via dynamic compaction when compared to less energetic, fragmental-type rock falls. These results suggest that accumulation of individual rock-fall boulders tends to steepen talus slopes, whereas large, energetic rock falls tend to flatten them. Detachment and impact signals were recorded by seismic and acoustic instruments and highlight the potential use of this type of instrumentation for generalized rock fall monitoring, while LiDAR and photography data were able to quantify the cliff geometry, rock fall volume, source and impact locations, and geomorphological changes to the cliff and talus.</p>","language":"English","publisher":"Earth Surface Processes and Landforms","doi":"10.1002/esp.3206","usgsCitation":"Valerie L. Zimmer, Collins, B.D., Greg M. Stock, and Nicholas Sitar, 2012, Rock fall dynamics and deposition: an integrated analysis of the 2009 Ahwiyah Point rock fall, Yosemite National Park, USA.: Earth Surface Processes and Landforms, v. 37, no. 6, p. 680-691, https://doi.org/10.1002/esp.3206.","productDescription":"11 p.","startPage":"680","endPage":"691","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-033985","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":323271,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Yosemite National Park","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              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Stock","affiliations":[{"id":590,"text":"U.S. Army Corps of Engineers","active":false,"usgs":false}],"preferred":false,"id":637772,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nicholas Sitar","contributorId":171505,"corporation":false,"usgs":false,"family":"Nicholas Sitar","affiliations":[{"id":590,"text":"U.S. Army Corps of Engineers","active":false,"usgs":false}],"preferred":false,"id":637773,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70041459,"text":"70041459 - 2012 - Earthquake studies reveal the magmatic plumbing system of the Katmai volcanoes","interactions":[],"lastModifiedDate":"2019-05-30T13:48:06","indexId":"70041459","displayToPublicDate":"2015-08-10T13:15:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":691,"text":"Alaska Park Science","printIssn":"1545- 496","active":true,"publicationSubtype":{"id":10}},"title":"Earthquake studies reveal the magmatic plumbing system of the Katmai volcanoes","docAbstract":"<p>The 1912 eruption of Novarupta was the largest of the 1900s (Fierstein and Hildreth 2001, Hildreth et al. 2003). A century later, fundamental questions remain regarding the source of the magma for that eruption. A previous seismic study of the Katmai area (Jolly et al. 2007) identified a single large area of anomalous structure in the subsurface centered beneath Katmai Pass (Figure 2), but the magma source for the 1912 eruption is thought to have been beneath Mt. Katmai (Hildreth et al. 2003). This mystery was a prime motivation for the research project described here.</p>\n<p>In summer 2008, scientists and staff from the Alaska Volcano Observatory (AVO) and the University of Wisconsin- Madison installed 11 temporary seismic recording instruments around the Katmai Pass area, complementing the existing AVO seismic network stations (Figure 3). The primary goal of the deployment was to record data from local earthquakes in order to yield an improved model of the three-dimensional structure of the upper crust beneath and surrounding Katmai Pass, using an analysis method known as double-difference seismic tomography (Zhang and Thurber 2003). The method yields a threedimensional image of the velocity of seismic waves in the subsurface, and also produces improved estimates of the locations of the earthquakes beneath the seismic stations.</p>\n<p>Our main finding is that there is not a single large anomalous zone centered beneath Katmai Pass; rather there are several separate anomalous zones, one each beneath Katmai, Trident-Novarupta, and Martin-Mageik. Furthermore, the earthquakes are tightly clustered beneath the various volcanic centers, and are found to be systematically deeper than previously thought. Linear trends of earthquakes are also revealed, similar to features observed at other volcanoes, possibly outlining previously unidentified fault structures or indicating the path of migrating magma or magmatic fluids and gases.</p>","language":"English","publisher":"Alaska Park Science","publisherLocation":"U.S. Geological Survey","usgsCitation":"Thurber, C., Murphy, R., Prejean, S.G., Haney, M.M., Bennington, N., Powell, L., and Paskievitch, J.F., 2012, Earthquake studies reveal the magmatic plumbing system of the Katmai volcanoes: Alaska Park Science, v. 11, no. 1, 6 p.","productDescription":"6 p.","numberOfPages":"6","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-034836","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true},{"id":617,"text":"Volcano Science 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jpaskie@usgs.gov","contributorId":3709,"corporation":false,"usgs":true,"family":"Paskievitch","given":"John","email":"jpaskie@usgs.gov","middleInitial":"F.","affiliations":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"preferred":true,"id":578973,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70039513,"text":"70039513 - 2012 - Water monitoring to support the State of Illinois Governor's Drought Response Task Force -August 7, 2012","interactions":[],"lastModifiedDate":"2015-11-02T09:43:36","indexId":"70039513","displayToPublicDate":"2015-07-13T08:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":6,"text":"USGS Unnumbered Series"},"title":"Water monitoring to support the State of Illinois Governor's Drought Response Task Force -August 7, 2012","docAbstract":"<p>The U.S. Geological Survey (USGS) collects streamflow, groundwater level, and water-quality data for the State of Illinois and the Nation. Much of these data are collected every 15 minutes (real-time) as a part of the national network, so that water-resource managers can make decisions in a timely and reliable manner. Coupled with modeling and other water-resource investigations, the USGS provides data to the State during droughts and other hydrologic events. 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,{"id":70004400,"text":"70004400 - 2012 - Evaluation of long-term gas hydrate production testing locations on the Alaska North Slope","interactions":[],"lastModifiedDate":"2015-10-28T15:04:00","indexId":"70004400","displayToPublicDate":"2015-07-05T08:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3326,"text":"SPE Reservoir Evaluation and Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of long-term gas hydrate production testing locations on the Alaska North Slope","docAbstract":"<p>The results of short-duration formation tests in northern Alaska and Canada have further documented the energy-resource potential of gas hydrates and have justified the need for long-term gas-hydrate-production testing. Additional data acquisition and long-term production testing could improve the understanding of the response of naturally occurring gas hydrate to depressurization-induced or thermal-, chemical-, or mechanical-stimulated dissociation of gas hydrate into producible gas. The Eileen gashydrate accumulation located in the Greater Prudhoe Bay area in northern Alaska has become a focal point for gas-hydrate geologic and production studies. BP Exploration (Alaska) Incorporated and ConocoPhillips have each established research partnerships with the US Department of Energy to assess the production potential of gas hydrates in northern Alaska. A critical goal of these efforts is to identify the most suitable site for production testing. A total of seven potential locations in the Prudhoe Bay, Kuparuk River, and Milne Point production units were identified and assessed relative to their suitability as a long-term gas-hydrate-production test sites. The test-site-assessment criteria included the analysis of the geologic risk associated with encountering reservoirs for gas-hydrate testing. The site-selection process also dealt with the assessment of the operational/logistical risk associated with each of the potential test sites. From this review, a site in the Prudhoe Bay production unit was determined to be the best location for extended gas-hydrate-production testing. The work presented in this report identifies the key features of the potential test site in the Greater Prudhoe Bay area and provides new information on the nature of gas-hydrate occurrence and the potential impact of production testing on existing infrastructure at the most favorable sites. These data were obtained from well-log analysis, geological correlation and mapping, and numerical simulation.</p>","language":"English","publisher":"Society of Petroleum Engineers","doi":"10.2118/155504-PA","usgsCitation":"Collett, T.S., Boswell, R., Lee, M.W., Anderson, B.J., Rose, K.K., and Lewis, K.A., 2012, Evaluation of long-term gas hydrate production testing locations on the Alaska North Slope: SPE Reservoir Evaluation and Engineering, v. 15, no. 2, p. 243-264, https://doi.org/10.2118/155504-PA.","productDescription":"22 p.","startPage":"243","endPage":"264","numberOfPages":"22","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-026459","costCenters":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"links":[{"id":310737,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"North 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K.","contributorId":82452,"corporation":false,"usgs":true,"family":"Rose","given":"Kelly","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":578628,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lewis, Kristen A. 0000-0003-4991-3399 klewis@usgs.gov","orcid":"https://orcid.org/0000-0003-4991-3399","contributorId":4120,"corporation":false,"usgs":true,"family":"Lewis","given":"Kristen","email":"klewis@usgs.gov","middleInitial":"A.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":578629,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70041709,"text":"70041709 - 2012 - VS30 – A site-characterization parameter for use in building Codes, simplified earthquake resistant design, GMPEs, and ShakeMaps","interactions":[],"lastModifiedDate":"2015-10-29T11:48:04","indexId":"70041709","displayToPublicDate":"2015-06-08T08:15:00","publicationYear":"2012","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"VS30 – A site-characterization parameter for use in building Codes, simplified earthquake resistant design, GMPEs, and ShakeMaps","docAbstract":"<p>VS30, defined as the average seismic shear-wave velocity from the surface to a depth of 30 meters, has found wide-spread use as a parameter to characterize site response for simplified earthquake resistant design as implemented in building codes worldwide. VS30&nbsp;, as initially introduced by the author for the US 1994 NEHRP Building Code, provides unambiguous definitions of site classes and site coefficients for site-dependent response spectra based on correlations derived from extensive borehole logging and comparative ground-motion measurement programs in California. Subsequent use of VS30&nbsp;for development of strong ground motion prediction equations (GMPEs) and measurement of extensive sets of VS borehole data have confirmed the previous empirical correlations and established correlations of SVS30 with VSZ&nbsp;at other depths. These correlations provide closed form expressions to predict S30 V at a large number of additional sites and further justify S30 V as a parameter to characterize site response for simplified building codes, GMPEs, ShakeMap, and seismic hazard mapping.</p>","conferenceTitle":"The 15th World Conference on Earthquake Engineering","conferenceDate":"September 24-28, 2012","conferenceLocation":"Lisbon, Portugal","language":"English","usgsCitation":"Borcherdt, R.D., 2012, VS30 – A site-characterization parameter for use in building Codes, simplified earthquake resistant design, GMPEs, and ShakeMaps, The 15th World Conference on Earthquake Engineering, Lisbon, Portugal, September 24-28, 2012, 10 p.","productDescription":"10 p.","numberOfPages":"10","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-037137","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":310763,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"UNITED STATES","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56334345e4b048076347eef1","contributors":{"authors":[{"text":"Borcherdt, Roger D. 0000-0002-8668-0849 borcherdt@usgs.gov","orcid":"https://orcid.org/0000-0002-8668-0849","contributorId":2373,"corporation":false,"usgs":true,"family":"Borcherdt","given":"Roger","email":"borcherdt@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":578693,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70041710,"text":"70041710 - 2012 - Report on progress at the Center for Engineering Strong Motion Data (CESMD)","interactions":[],"lastModifiedDate":"2015-10-29T11:33:00","indexId":"70041710","displayToPublicDate":"2015-06-08T04:15:00","publicationYear":"2012","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Report on progress at the Center for Engineering Strong Motion Data (CESMD)","docAbstract":"<p>Strong-motion data of engineering and scientific importance from the United States and other seismically active countries are served through the Center for Engineering Strong Motion Data (CESMD) at www.strongmotioncenter.org. Recently, the CESMD staff, with cooperation from colleagues at international strong-motion seismic networks, has disseminated strong-motion data from significant earthquakes that occurred in Italy, Haiti, Mexico, New Zealand, Chile, Japan, Turkey, and the United States.</p>\n<p>The CESMD now automatically posts strong-motion data from an increasing number of seismic stations in California within a few minutes following an earthquake as an Internet Quick Report (IQR). As appropriate, IQRs are updated by more comprehensive Internet Data Reports that include reviewed versions of the data and maps showing, for example, the finite fault rupture along with the distribution of recording stations. Automated processing of strong-motion data will be extended to post the strong-motion records of the regional seismic networks of the Advanced National Seismic System (ANSS) outside California.</p>\n<p>Transfer of the operational and maintenance responsibilities for the Consortium of Organizations for Strong Motion Observation Systems (COSMOS) Virtual Data Center (VDC) from the University of California at Santa Barbara to the CESMD is nearing completion. 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,{"id":70159518,"text":"ofr20131280G1 - 2012 - Permissive tracts for nickel, copper, platinum group elements (PGE), and chromium deposits of Mauritania (phase V, deliverable 66): Chapter G1 in <i>Second projet de renforcement institutionnel du secteur minier de la République  Islamique de Mauritanie (PRISM-II)</i>","interactions":[{"subject":{"id":70159518,"text":"ofr20131280G1 - 2012 - Permissive tracts for nickel, copper, platinum group elements (PGE), and chromium deposits of Mauritania (phase V, deliverable 66): Chapter G1 in <i>Second projet de renforcement institutionnel du secteur minier de la République  Islamique de Mauritanie (PRISM-II)</i>","indexId":"ofr20131280G1","publicationYear":"2012","noYear":false,"chapter":"G1","title":"Permissive tracts for nickel, copper, platinum group elements (PGE), and chromium deposits of Mauritania (phase V, deliverable 66): Chapter G1 in <i>Second projet de renforcement institutionnel du secteur minier de la République  Islamique de Mauritanie (PRISM-II)</i>"},"predicate":"IS_PART_OF","object":{"id":70160523,"text":"ofr20131280 - 2015 - Second Projet de Renforcement Institutionnel du Secteur Minier de la République  Islamique de Mauritanie (PRISM-II) Phase V","indexId":"ofr20131280","publicationYear":"2015","noYear":false,"title":"Second Projet de Renforcement Institutionnel du Secteur Minier de la République  Islamique de Mauritanie (PRISM-II) Phase V"},"id":1}],"isPartOf":{"id":70160523,"text":"ofr20131280 - 2015 - Second Projet de Renforcement Institutionnel du Secteur Minier de la République  Islamique de Mauritanie (PRISM-II) Phase V","indexId":"ofr20131280","publicationYear":"2015","noYear":false,"title":"Second Projet de Renforcement Institutionnel du Secteur Minier de la République  Islamique de Mauritanie (PRISM-II) Phase V"},"lastModifiedDate":"2016-03-21T15:26:47","indexId":"ofr20131280G1","displayToPublicDate":"2015-01-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2013-1280","chapter":"G1","title":"Permissive tracts for nickel, copper, platinum group elements (PGE), and chromium deposits of Mauritania (phase V, deliverable 66): Chapter G1 in <i>Second projet de renforcement institutionnel du secteur minier de la République  Islamique de Mauritanie (PRISM-II)</i>","docAbstract":"<p>In 1996, at the request of the Government of the Islamic Republic of Mauritania, a team of U.S. Geological Survey (USGS) scientists produced a strategic plan for the acquisition, improvement and modernization of multidisciplinary sets of data to support the growth of the Mauritanian minerals sector and to highlight the geological and mineral exploration potential of the country. In 1999, the Ministry of Petroleum, Energy, and Mines of the Islamic Republic of Mauritania implemented a program for the acquisition of the recommended basic geoscientific information, termed the first Projet de Renforcement Institutionnel du Secteur Minier (Project for Institutional Capacity Building in the Mining Sector, PRISM-I). As a result of the PRISM-I efforts, a great deal of new geological, geophysical, geochemical, remote sensing, and hydrological data became available for evaluation and synthesis. However, the Ministry of Petroleum, Energy, and Mines recognized that additional work was required to extract the full benefit of the data before it could be of greatest use to the international community and of benefit to the Mauritanian minerals and development sector.</p>\n<p>To achieve this benefit, the Ministry of Petroleum, Energy, and Mines implemented a second Projet de Renforcement Institutionnel du Secteur Minier (PRISM-II) in 2006 to consolidate, synthesize, and interpret all of the existing data, create a new 1:1,000,000 scale geologic map, and define the mineral resource potential of the country. A consortium in which the USGS was the lead scientific agency carried out the majority of the PRISM-II work. In 2008, the USGS Mauritania Minerals Project was interrupted due to political changes in Mauritania. PRISM-II work resumed in 2011, and was completed in 2013 with the delivery of over 40 separate written reports and plates, an access file containing the Mauritanian National Mineral Deposits Database, and an interactive GIS containing all of the multi-disciplinary data and interpretive areas of mineral resource potential in Mauritania.</p>\n<p>This report contains the USGS results of the PRISM-II Mauritania Minerals Project and is presented in cooperation with the Ministry of Petroleum, Energy, and Mines of the Islamic Republic of Mauritania. The Report is composed of separate chapters consisting of multidisciplinary interpretive reports with accompanying plates on the geology, structure, geochronology, geophysics, hydrogeology, geochemistry, remote sensing (Landsat TM and ASTER), and SRTM and ASTER digital elevation models of Mauritania. The syntheses of these multidisciplinary data formed the basis for additional chapters containing interpretive reports on 12 different commodities and deposit types known to occur in Mauritania, accompanied by countrywide mineral resource potential maps of each commodity/deposit type. The commodities and deposit types represented include: (1) Ni, Cu, PGE, and Cr deposits hosted in ultramafic rocks; (2) orogenic, Carlin-like, and epithermal gold deposits; (3) polymetallic Pb-Zn-Cu vein deposits; (4) sediment-hosted Pb-Zn-Ag deposits of the SEDEX and Mississippi Valley-type; (5) sediment-hosted copper deposits; ( 6) volcanogenic massive sulfide deposits; (7) iron oxide copper-gold deposits; (8) uranium deposits; (9) Algoma-, Superior-, and oolitic-type iron deposits; (10) shoreline Ti-Zr placer deposits; (11) incompatible element deposits hosted in pegmatites, alkaline rocks, and carbonatites, and; (12) industrial mineral deposits. Additional chapters include the Mauritanian National Mineral Deposits Database are accompanied by an explanatory text and the Mauritania Minerals Project GIS that contains all of the interpretive layers created by USGS scientists. Raw data not in the public domain may be obtained from the Ministry of Petroleum, Energy, and Mines in Nouakchott, Mauritania.</p>","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Second projet de renforcement institutionnel du secteur minier de la République  Islamique de Mauritanie (PRISM-II) (Open File Report 2013-1280)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20131280G1","collaboration":"Prepared in cooperation with the Ministry of Petroleum, Energy, and Mines of the Islamic Republic of Mauritania","usgsCitation":"Taylor, C.D., and Horton, J.D., 2012, Permissive tracts for nickel, copper, platinum group elements (PGE), and chromium deposits of Mauritania (phase V, deliverable 66): Chapter G1 in <i>Second projet de renforcement institutionnel du secteur minier de la République  Islamique de Mauritanie (PRISM-II)</i>: U.S. Geological Survey Open-File Report 2013-1280, Plate: 54.0 x 60.0 inches; Data; Metadata, https://doi.org/10.3133/ofr20131280G1.","productDescription":"Plate: 54.0 x 60.0 inches; Data; Metadata","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-056859","costCenters":[{"id":387,"text":"Mineral Resources Program","active":true,"usgs":true}],"links":[{"id":319123,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20131280G1.PNG"},{"id":318739,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/publication/ofr20131280"},{"id":319122,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2013/1280/GIS_and_Maps/Chapter_G1_deliverable_66-Nickel_copper_platinum_group_elements_(PGE)_and_chromium_deposits/","text":"Map, Data, and Metadata"}],"country":"Mauritania","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-12.17075,14.61683],[-12.83066,15.30369],[-13.43574,16.03938],[-14.09952,16.3043],[-14.57735,16.59826],[-15.13574,16.58728],[-15.62367,16.36934],[-16.12069,16.45566],[-16.4631,16.13504],[-16.54971,16.67389],[-16.27055,17.16696],[-16.14635,18.10848],[-16.25688,19.09672],[-16.37765,19.59382],[-16.27784,20.09252],[-16.53632,20.56787],[-17.06342,20.99975],[-16.84519,21.33332],[-12.9291,21.32707],[-13.11875,22.77122],[-12.87422,23.28483],[-11.93722,23.37459],[-11.96942,25.93335],[-8.68729,25.88106],[-8.6844,27.39574],[-4.92334,24.97457],[-6.45379,24.95659],[-5.97113,20.64083],[-5.48852,16.3251],[-5.31528,16.20185],[-5.53774,15.50169],[-9.55024,15.4865],[-9.70026,15.26411],[-10.08685,15.33049],[-10.65079,15.13275],[-11.3491,15.41126],[-11.66608,15.38821],[-11.83421,14.7991],[-12.17075,14.61683]]]},\"properties\":{\"name\":\"Mauritania\"}}]}","publishingServiceCenter":{"id":2,"text":"Denver PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56f11b66e4b0f59b85ddc4b0","contributors":{"authors":[{"text":"Taylor, Cliff D. 0000-0001-6376-6298 ctaylor@usgs.gov","orcid":"https://orcid.org/0000-0001-6376-6298","contributorId":1283,"corporation":false,"usgs":true,"family":"Taylor","given":"Cliff","email":"ctaylor@usgs.gov","middleInitial":"D.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":622267,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Horton, John D. 0000-0003-2969-9073 jhorton@usgs.gov","orcid":"https://orcid.org/0000-0003-2969-9073","contributorId":1227,"corporation":false,"usgs":true,"family":"Horton","given":"John","email":"jhorton@usgs.gov","middleInitial":"D.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":622268,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70136255,"text":"70136255 - 2012 - Long-distance swimming by polar bears (Ursus maritimus) of the southern Beaufort Sea during years of extensive open water","interactions":[],"lastModifiedDate":"2018-09-25T13:27:17","indexId":"70136255","displayToPublicDate":"2014-12-30T11:30:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1176,"text":"Canadian Journal of Zoology","active":true,"publicationSubtype":{"id":10}},"title":"Long-distance swimming by polar bears (Ursus maritimus) of the southern Beaufort Sea during years of extensive open water","docAbstract":"<p>Polar bears (<i>Ursus maritimus</i> Phipps, 1774) depend on sea ice for catching marine mammal prey. Recent sea-ice declines have been linked to reductions in body condition, survival, and population size. Reduced foraging opportunity is hypothesized to be the primary cause of sea-ice-linked declines, but the costs of travel through a deteriorated sea-ice environment also may be a factor. We used movement data from 52 adult female polar bears wearing Global Positioning System (GPS) collars, including some with dependent young, to document long-distance swimming (&gt;50 km) by polar bears in the southern Beaufort and Chukchi seas. During 6 years (2004-2009), we identified 50 long-distance swims by 20 bears. Swim duration and distance ranged from 0.7 to 9.7 days (mean = 3.4 days) and 53.7 to 687.1 km (mean = 154.2 km), respectively. Frequency of swimming appeared to increase over the course of the study. We show that adult female polar bears and their cubs are capable of swimming long distances during periods when extensive areas of open water are present. However, long-distance swimming appears to have higher energetic demands than moving over sea ice. Our observations suggest long-distance swimming is a behavioral response to declining summer sea-ice conditions.</p>","language":"English","publisher":"National Research Council of Canada","publisherLocation":"Ottawa, Canada","doi":"10.1139/Z2012-033","usgsCitation":"Pagano, A.M., Durner, G.M., Simac, K.S., York, G., and Amstrup, S.C., 2012, Long-distance swimming by polar bears (Ursus maritimus) of the southern Beaufort Sea during years of extensive open water: Canadian Journal of Zoology, v. 90, no. 5, p. 663-676, https://doi.org/10.1139/Z2012-033.","productDescription":"14 p.","startPage":"663","endPage":"676","numberOfPages":"14","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-035037","costCenters":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"links":[{"id":296931,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"90","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"54dd2a93e4b08de9379b3106","contributors":{"authors":[{"text":"Pagano, Anthony M. 0000-0003-2176-0909 apagano@usgs.gov","orcid":"https://orcid.org/0000-0003-2176-0909","contributorId":3884,"corporation":false,"usgs":true,"family":"Pagano","given":"Anthony","email":"apagano@usgs.gov","middleInitial":"M.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":746233,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Durner, George M. 0000-0002-3370-1191 gdurner@usgs.gov","orcid":"https://orcid.org/0000-0002-3370-1191","contributorId":3576,"corporation":false,"usgs":true,"family":"Durner","given":"George","email":"gdurner@usgs.gov","middleInitial":"M.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":746234,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Simac, Kristin S. 0000-0002-4072-1940 ksimac@usgs.gov","orcid":"https://orcid.org/0000-0002-4072-1940","contributorId":131096,"corporation":false,"usgs":true,"family":"Simac","given":"Kristin","email":"ksimac@usgs.gov","middleInitial":"S.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":746236,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"York, G.S.","contributorId":103857,"corporation":false,"usgs":true,"family":"York","given":"G.S.","email":"","affiliations":[],"preferred":false,"id":746237,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Amstrup, Steven C.","contributorId":67034,"corporation":false,"usgs":false,"family":"Amstrup","given":"Steven","email":"","middleInitial":"C.","affiliations":[{"id":13182,"text":"Polar Bears International","active":true,"usgs":false}],"preferred":false,"id":746238,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70121535,"text":"tm11B4 - 2012 - Lidar base specification","interactions":[],"lastModifiedDate":"2019-10-30T12:53:53","indexId":"tm11B4","displayToPublicDate":"2014-11-25T10:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":335,"text":"Techniques and Methods","code":"TM","onlineIssn":"2328-7055","printIssn":"2328-7047","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"11-B4","displayTitle":"Lidar Base Specification","title":"Lidar base specification","docAbstract":"<p>In late 2009, a $14.3 million allocation from the American Recovery and Reinvestment Act (ARRA) for new light detection and ranging (lidar) elevation data acquisition prompted the U.S. Geological Survey (USGS) National Geospatial Program (NGP) to develop a common minimum specification for all lidar data acquired for The National Map. Released as a working draft in 2010 and formally published in 2012, the USGS–NGP Lidar Base Specification (LBS) was quickly embraced by numerous States, counties, and foreign countries as the foundation for their own lidar specifications.</p><p>Prompted by a growing appreciation for the wide applicability and inherent value of lidar, a consortium of Federal agencies commissioned the National Enhanced Elevation Assessment (NEEA) study in 2010 to quantify the costs and benefits of a national lidar program. Published in 2012, the NEEA report documented a substantial return on such an investment, defined five quality levels (QL) for elevation data, and recommended an 8-year collection cycle of QL2 lidar data as the optimum balance of benefit and affordability. In response to the study, the USGS–NGP established the 3D Elevation Program (3DEP) in 2013 as the interagency vehicle through which the NEEA recommendations could be realized.</p><p>Lidar is a quickly evolving technology and much has changed in the industry since the previous version of the Lidar Base Specification (LBS) was published. Lidar data have improved in accuracy and spatial resolution, the American Society for Photogrammetry and Remote Sensing has revised the geospatial accuracy standards, industry standard file formats have been expanded, additional applications for lidar have become accepted, and the need for interoperable data across collections has been realized. This revision to the LBS addresses some of those changes and provides continued guidance towards a nationally consistent lidar dataset.</p><h3>Note</h3><p><span>Future versions of the Lidar base specification will be released online at&nbsp;</span><a rel=\"noopener\" href=\"https://www.usgs.gov/3DEP/lidarspec\" target=\"_blank\" data-mce-href=\"https://www.usgs.gov/3DEP/lidarspec\">https://www.usgs.gov/3DEP/lidarspec</a>.</p>","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Section B: U.S. Geological Survey standards in Book 11: <i>Collection and delineation of spatial data</i>","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/tm11B4","collaboration":"National Geospatial Program","usgsCitation":"Heidemann, Hans Karl, 2018, Lidar base specification (ver. 1.3, February 2018): U.S. Geological Survey Techniques and Methods, book 11, chap. B4, 101 p., https://doi.org/10.3133/tm11b4.","productDescription":"viii, 101 p.","numberOfPages":"114","onlineOnly":"Y","additionalOnlineFiles":"N","ipdsId":"IP-051376","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true},{"id":404,"text":"NGTOC Rolla","active":true,"usgs":true}],"links":[{"id":352170,"rank":5,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/tm/11b4/images/coverthb2.jpg"},{"id":352167,"rank":3,"type":{"id":7,"text":"Companion Files"},"url":"https://pubs.usgs.gov/tm/11b4/Version1.0/TM11-B4.pdf","text":"Version 1.0, August 2012","size":"11.4 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Version 1.0"},{"id":352166,"rank":2,"type":{"id":25,"text":"Version History"},"url":"https://pubs.usgs.gov/tm/11b4/versionHist2.txt","text":"Version History","size":"9.63 kB","linkFileType":{"id":2,"text":"txt"},"description":"Version History"},{"id":352168,"rank":4,"type":{"id":7,"text":"Companion Files"},"url":"https://pubs.usgs.gov/tm/11b4/Version1.2/tm11-B4.pdf","text":"Version 1.2, November 2014","size":"2.06 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Version 1.2"},{"id":352165,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/tm/11b4/pdf/tm11-B4.pdf","text":"Report—Version 1.3","size":"4.51 MB","linkFileType":{"id":1,"text":"pdf"},"description":"T & M 11–B4"},{"id":368368,"rank":6,"type":{"id":22,"text":"Related Work"},"url":"https://www.usgs.gov/3DEP/lidarspec","text":"The latest version of the Lidar Base Specification is available at https://www.usgs.gov/3DEP/lidarspec"}],"edition":"Version 1.0: Originally posted August 17. 2012; Version 1.1: October 29, 2014;  Version 1.2: November 12, 2014; Version 1.3: February 28, 2018","publicComments":"This report is Chapter 4 of Section B: U.S. Geological Survey standards in Book 11: <i>Collection and delineation of spatial data</i>.","contact":"<p>Director,&nbsp;<a href=\"https://eros.usgs.gov/\" data-mce-href=\"https://eros.usgs.gov/\">Earth Resources Observation and Science Center</a> <br>U.S. Geological Survey<br>47914 252nd Street <br>Sioux Falls, SD 57198</p>","tableOfContents":"<ul><li>Abstract<br></li><li>Introduction<br></li><li>Collection<br></li><li>Data Processing and Handling<br></li><li>Deliverables<br></li><li>Digital Elevation Model Surface Treatments<br></li><li>References Cited<br></li><li>Tables<br></li><li>Figures<br></li><li>Glossary<br></li><li>Appendix 1. Common Data Upgrades<br></li><li>Appendix 2. Hydro-Flattening References<br></li><li>Appendix 3. Light Detection and Ranging Metadata Example<br></li><li>Appendix 4. Light Detection and Ranging Metadata Template<br></li><li>Appendix 5. Well-Known Text Coordinate Reference System Examples<br></li><li>Appendix 6. Supplemental Information<br></li></ul>","publishingServiceCenter":{"id":4,"text":"Rolla PSC"},"publishedDate":"2012-08-17","revisedDate":"2018-02-28","noUsgsAuthors":false,"publicationDate":"2012-08-17","publicationStatus":"PW","scienceBaseUri":"54759a1be4b042f27ef134d1","contributors":{"authors":[{"text":"Heidemann, Hans Karl 0000-0003-4306-359X kheidemann@usgs.gov","orcid":"https://orcid.org/0000-0003-4306-359X","contributorId":3755,"corporation":false,"usgs":true,"family":"Heidemann","given":"Hans","email":"kheidemann@usgs.gov","middleInitial":"Karl","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":false,"id":522838,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70042632,"text":"70042632 - 2012 - Near-bed turbulence and sediment flux measurements in tidal channels","interactions":[],"lastModifiedDate":"2016-06-29T10:49:34","indexId":"70042632","displayToPublicDate":"2014-09-16T13:15:00","publicationYear":"2012","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Near-bed turbulence and sediment flux measurements in tidal channels","docAbstract":"<p>Understanding the hydrodynamics and sediment transport dynamics in tidal channels is important for studies of estuary geomorphology, sediment supply to tidal wetlands, aquatic ecology and fish habitat, and dredging and navigation. Hydrodynamic and sediment transport data are essential for calibration and testing of numerical models that may be used to address management questions related to these topics. Herein we report preliminary analyses of near-bed turbulence and sediment flux measurements in the Sacramento-San Joaquin Delta, a large network of tidal channels and wetlands located at the confluence of the Sacramento and San Joaquin Rivers, California, USA (Figure 1). Measurements were made in 6 channels spanning a wide range of size and tidal conditions, from small channels that are primarily fluvial to large channels that are tidally dominated. The results of these measurements are summarized herein and the hydrodynamic and sediment transport characteristics of the channels are compared across this range of size and conditions.</p>","largerWorkType":{"id":24,"text":"Conference Paper"},"largerWorkTitle":"Proceedings of the Hydraulic Measurement and Experimental Methods Conference, Snowbird, Utah, August 12-15, 2012","largerWorkSubtype":{"id":19,"text":"Conference Paper"},"conferenceTitle":"Hydraulic Measurement and Experimental Methods Conference","conferenceDate":"August 12, 2012","conferenceLocation":"Snowbird, Utah","language":"English","publisherLocation":"Reston, VA","usgsCitation":"Wright, S., and Whealdon-Haught, D., 2012, Near-bed turbulence and sediment flux measurements in tidal channels, <i>in</i> Proceedings of the Hydraulic Measurement and Experimental Methods Conference, Snowbird, Utah, August 12-15, 2012, Snowbird, Utah, August 12, 2012, 6 p.","productDescription":"6 p.","numberOfPages":"6","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-038033","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":324597,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://ca.water.usgs.gov/projects/baydelta/publications.html"},{"id":324598,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -121.86035156249999,\n              38.098901948321256\n            ],\n            [\n              -121.85760498046875,\n              38.01239425385966\n            ],\n            [\n              -121.55273437499999,\n              37.95827503526034\n            ],\n            [\n              -121.46347045898438,\n              37.966936792535144\n            ],\n            [\n              -121.47720336914062,\n              38.25974980039479\n            ],\n            [\n              -121.8878173828125,\n              38.23386541556983\n            ],\n            [\n              -121.86035156249999,\n              38.098901948321256\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5774f2a1e4b07dd077c6a780","contributors":{"authors":[{"text":"Wright, S.A.","contributorId":90080,"corporation":false,"usgs":true,"family":"Wright","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":640594,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Whealdon-Haught, D.R.","contributorId":172409,"corporation":false,"usgs":false,"family":"Whealdon-Haught","given":"D.R.","affiliations":[],"preferred":false,"id":640595,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70120698,"text":"70120698 - 2012 - Developing a national stream morphology data exchange: needs, challenges, and opportunities","interactions":[],"lastModifiedDate":"2014-08-15T15:14:43","indexId":"70120698","displayToPublicDate":"2013-08-15T14:41:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1578,"text":"Eos, Transactions, American Geophysical Union","onlineIssn":"2324-9250","printIssn":"0096-394","active":true,"publicationSubtype":{"id":10}},"title":"Developing a national stream morphology data exchange: needs, challenges, and opportunities","docAbstract":"</p>Stream morphology data, primarily consisting of channel and foodplain geometry and bed material size measurements, historically have had a wide range of applications and uses including culvert/ bridge design, rainfall- runoff modeling, food inundation mapping (e.g., U.S. Federal Emergency Management Agency food insurance studies), climate change studies, channel stability/sediment source investigations, navigation studies, habitat assessments, and landscape change research. The need for stream morphology data in the United States, and thus the quantity of data collected, has grown substantially over the past 2 decades because of the expanded interests of resource management agencies in watershed management and restoration. The quantity of stream morphology data collected has also increased because of state-of-the-art technologies capable of rapidly collecting high-resolution data over large areas with heretofore unprecedented precision. Despite increasing needs for and the expanding quantity of stream morphology data, neither common reporting standards nor a central data archive exist for storing and serving these often large and spatially complex data sets. We are proposing an open- access data exchange for archiving and disseminating stream morphology data.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Eos, Transactions American Geophysical Union","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1029/2012EO200005","usgsCitation":"Collins, M.J., Gray, J.R., Peppler, M.C., Fitzpatrick, F.A., and Schubauer-Berigan, J.P., 2012, Developing a national stream morphology data exchange: needs, challenges, and opportunities: Eos, Transactions, American Geophysical Union, v. 93, no. 20, https://doi.org/10.1029/2012EO200005.","productDescription":"1 p.","startPage":"195","costCenters":[{"id":502,"text":"Office of Surface Water","active":true,"usgs":true}],"links":[{"id":292326,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":292325,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2012EO200005"}],"volume":"93","issue":"20","noUsgsAuthors":false,"publicationDate":"2012-05-15","publicationStatus":"PW","scienceBaseUri":"53ef1ec6e4b0bfa1f993ef05","contributors":{"authors":[{"text":"Collins, Mathias J.","contributorId":19086,"corporation":false,"usgs":true,"family":"Collins","given":"Mathias","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":498403,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gray, John R. 0000-0002-8817-3701 jrgray@usgs.gov","orcid":"https://orcid.org/0000-0002-8817-3701","contributorId":1158,"corporation":false,"usgs":true,"family":"Gray","given":"John","email":"jrgray@usgs.gov","middleInitial":"R.","affiliations":[{"id":5058,"text":"Office of the Chief Scientist for Water","active":true,"usgs":true}],"preferred":true,"id":498401,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Peppler, Marie C. 0000-0002-1120-9673 mpeppler@usgs.gov","orcid":"https://orcid.org/0000-0002-1120-9673","contributorId":825,"corporation":false,"usgs":true,"family":"Peppler","given":"Marie","email":"mpeppler@usgs.gov","middleInitial":"C.","affiliations":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true},{"id":502,"text":"Office of Surface Water","active":true,"usgs":true}],"preferred":true,"id":498400,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fitzpatrick, Faith A. fafitzpa@usgs.gov","contributorId":1182,"corporation":false,"usgs":true,"family":"Fitzpatrick","given":"Faith","email":"fafitzpa@usgs.gov","middleInitial":"A.","affiliations":[{"id":476,"text":"North Carolina Water Science Center","active":true,"usgs":true}],"preferred":false,"id":498402,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Schubauer-Berigan, Joseph P.","contributorId":106220,"corporation":false,"usgs":true,"family":"Schubauer-Berigan","given":"Joseph","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":498404,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70118983,"text":"70118983 - 2012 - Social.Water - A crowdsourcing tool for environmental data acquisition","interactions":[],"lastModifiedDate":"2014-08-04T10:00:29","indexId":"70118983","displayToPublicDate":"2013-08-04T09:59:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1315,"text":"Computers & Geosciences","printIssn":"0098-3004","active":true,"publicationSubtype":{"id":10}},"title":"Social.Water - A crowdsourcing tool for environmental data acquisition","docAbstract":"Remote telemetry has a long history of use for collection of environmental measurements. With the rise of mobile phones and SMS text-messaging capacity, many members of the general pubic carry communications equipment in their pockets at all times. Enabling the general public to provide environmental data through text messages has the potential both to provide additional data to scientific projects and also to raise awareness of the projects through participation. Hydrologic measurements – some of which can be made without training, involve a single measurement, and are often made in rural areas – are well-suited to text-message conveyance. Many other environmental measurements are similarly well-suited for this technology. Social.Water is a software package, written in Python, that collects, parses, and categorizes text messages sent to a dedicated phone number, updates a simple database, and posts both graphical results and the database on the Web. Social.Water was designed as the backend to the Crowdhydrology project and is written in an object-oriented design that makes customization and modification straightforward.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Computers and Geosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.cageo.2012.06.015","usgsCitation":"Fienen, M., and Lowry, C., 2012, Social.Water - A crowdsourcing tool for environmental data acquisition: Computers & Geosciences, v. 49, p. 164-169, https://doi.org/10.1016/j.cageo.2012.06.015.","productDescription":"6 p.","startPage":"164","endPage":"169","ipdsId":"IP-038629","costCenters":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true}],"links":[{"id":291568,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":291545,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.cageo.2012.06.015"}],"volume":"49","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53e09e5de4b0beb42bdca496","contributors":{"authors":[{"text":"Fienen, Michael N. 0000-0002-7756-4651 mnfienen@usgs.gov","orcid":"https://orcid.org/0000-0002-7756-4651","contributorId":893,"corporation":false,"usgs":true,"family":"Fienen","given":"Michael N.","email":"mnfienen@usgs.gov","affiliations":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true}],"preferred":false,"id":497552,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lowry, Christopher","contributorId":82232,"corporation":false,"usgs":true,"family":"Lowry","given":"Christopher","affiliations":[],"preferred":false,"id":497553,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70118333,"text":"70118333 - 2012 - Holocene seasonal variability inferred from multiple proxy records from Crevice Lake, Yellowstone National Park, USA","interactions":[],"lastModifiedDate":"2014-07-28T13:53:32","indexId":"70118333","displayToPublicDate":"2013-07-28T13:49:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2996,"text":"Palaeogeography, Palaeoclimatology, Palaeoecology","printIssn":"0031-0182","active":true,"publicationSubtype":{"id":10}},"title":"Holocene seasonal variability inferred from multiple proxy records from Crevice Lake, Yellowstone National Park, USA","docAbstract":"A 9400-yr-old record from Crevice Lake, a semi-closed alkaline lake in northern Yellowstone National Park, was analyzed for pollen, charcoal, geochemistry, mineralogy, diatoms, and stable isotopes to develop a nuanced understanding of Holocene environmental history in a region of northern Rocky Mountains that receives both summer and winter precipitation. The limited surface area, conical bathymetry, and deep water (> 31 m) of Crevice Lake create oxygen-deficient conditions in the hypolimnion and preserve annually laminated sediment (varves) for much of the record. Pollen data indicate that the watershed supported a closed <i>Pinus</i>-dominated forest and low fire frequency prior to 8200 cal yr BP, followed by open parkland until 2600 cal yr BP, and open mixed-conifer forest thereafter. Fire activity shifted from infrequent stand-replacing fires initially to frequent surface fires in the middle Holocene and stand-replacing events in recent centuries. Low values of δ<sup>18</sup>O suggest high winter precipitation in the early Holocene, followed by steadily drier conditions after 8500 cal yr BP. Carbonate-rich sediments before 5000 cal yr BP imply warmer summer conditions than after 5000 cal yr BP. High values of molybdenum (Mo), uranium (U), and sulfur (S) indicate anoxic bottom-waters before 8000 cal yr BP, between 4400 and 3900 cal yr BP, and after 2400 cal yr BP. The diatom record indicates extensive water-column mixing in spring and early summer through much of the Holocene, but a period between 2200 and 800 cal yr BP had strong summer stratification, phosphate limitation, and oxygen-deficient bottom waters. Together, the proxy data suggest wet winters, protracted springs, and warm effectively wet summers in the early Holocene and less snowpack, cool springs, warm dry summers in the middle Holocene. In the late Holocene, the region and lake experienced extreme changes in winter, spring, and summer conditions, with particularly short springs and dry summers and winters during the Roman Warm Period (~ 2000 cal yr BP) and Medieval Climate Anomaly (1200–800 cal yr BP). Long springs and mild summers occurred during the Little Ice Age, and these conditions persist to the present. Although the proxy data indicate effectively wet summer conditions in the early Holocene and drier conditions in the middle and late Holocene, none point specifically to changes in summer precipitation as the cause. Instead, summer conditions were governed by multi-seasonal controls on effective moisture that operated over multiple time scales.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Palaeogeography, Palaeoclimatology, Palaeoecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.palaeo.2012.03.001","usgsCitation":"Whitlock, C., Dean, W.E., Fritz, S.C., Stevens, L.R., Stone, J., Power, M.J., Rosenbaum, J.R., Pierce, K.L., and Bracht-Flyr, B.B., 2012, Holocene seasonal variability inferred from multiple proxy records from Crevice Lake, Yellowstone National Park, USA: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 331-332, p. 90-103, https://doi.org/10.1016/j.palaeo.2012.03.001.","productDescription":"14 p.","startPage":"90","endPage":"103","costCenters":[],"links":[{"id":488287,"rank":0,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://digitalcommons.unl.edu/geosciencefacpub/388","text":"External Repository"},{"id":291184,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":291183,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.palaeo.2012.03.001"}],"country":"United States","state":"Montana","otherGeospatial":"Crevice Lake","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -110.5799524,44.9991884 ], [ -110.5799524,45.0023427 ], [ -110.5759534,45.0023427 ], [ -110.5759534,44.9991884 ], [ -110.5799524,44.9991884 ] ] ] } } ] }","volume":"331-332","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57f7f3c1e4b0bc0bec0a0b7b","contributors":{"authors":[{"text":"Whitlock, Cathy","contributorId":79745,"corporation":false,"usgs":false,"family":"Whitlock","given":"Cathy","email":"","affiliations":[{"id":6604,"text":"University of Oregon","active":true,"usgs":false}],"preferred":false,"id":496778,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dean, Walter E. dean@usgs.gov","contributorId":1801,"corporation":false,"usgs":true,"family":"Dean","given":"Walter","email":"dean@usgs.gov","middleInitial":"E.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":496773,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fritz, Sherilyn C.","contributorId":30155,"corporation":false,"usgs":true,"family":"Fritz","given":"Sherilyn","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":496775,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stevens, Lora R.","contributorId":34059,"corporation":false,"usgs":true,"family":"Stevens","given":"Lora","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":496776,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Stone, Jeffery R.","contributorId":95501,"corporation":false,"usgs":true,"family":"Stone","given":"Jeffery R.","affiliations":[],"preferred":false,"id":496780,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Power, Mitchell J.","contributorId":79032,"corporation":false,"usgs":true,"family":"Power","given":"Mitchell","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":496777,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Rosenbaum, Joseph R.","contributorId":89461,"corporation":false,"usgs":true,"family":"Rosenbaum","given":"Joseph","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":496779,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Pierce, Kenneth L. kpierce@usgs.gov","contributorId":1609,"corporation":false,"usgs":true,"family":"Pierce","given":"Kenneth","email":"kpierce@usgs.gov","middleInitial":"L.","affiliations":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true},{"id":547,"text":"Rocky Mountain Geographic Science Center","active":true,"usgs":true},{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":496772,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Bracht-Flyr, Brandi B.","contributorId":25877,"corporation":false,"usgs":true,"family":"Bracht-Flyr","given":"Brandi","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":496774,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70118309,"text":"70118309 - 2012 - Distribution of potentially bioavailable natural organic carbon in aquifer sediments at a chloroethene-contaminated site","interactions":[],"lastModifiedDate":"2014-07-28T13:03:15","indexId":"70118309","displayToPublicDate":"2013-07-28T12:59:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2255,"text":"Journal of Environmental Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Distribution of potentially bioavailable natural organic carbon in aquifer sediments at a chloroethene-contaminated site","docAbstract":"The distribution of natural organic carbon was investigated at a chloroethene-contaminated site where complete reductive dechlorination of tetrachloroethene (PCE) to vinyl chloride and ethene was observed. In this study, operationally defined potentially bioavailable organic carbon (PBOC) was measured in surficial aquifer sediment samples collected at varying depths and locations in the vicinity of a dense nonaqueous phase liquid (DNAPL) source and aqueous phase plume. The relationship between chloroethene concentrations and PBOC levels was examined by comparing differences in extractable organic carbon in aquifer sediments with minimal chloroethene exposure relative to samples collected in the source zone. Using performance-monitoring data, direct correlations with PBOC were also developed with chloroethene concentrations in groundwater. Results show a logarithm-normal distribution for PBOC in aquifer sediments with a mean concentration of 187  mg/kg. PBOC levels in sediments obtained from the underlying confining unit were generally greater when compared to sediments collected in the sandy surficial aquifer. Results demonstrated a statistically significant inverse correlation (p=0.007) between PBOC levels in aquifer sediments and chloroethene concentrations for selected monitoring wells in which chloroethene exposure was the highest. Results from laboratory exposure assays also demonstrated that sediment samples exhibited a reduction in PBOC levels of 35% and 73%, respectively, after a 72-h exposure period to PCE (20,000  μg/L). These results support the notion that PBOC depletion in sediments may be expected in chloroethene-contaminated aquifers, which has potential implications for the long-term sustainability of monitored natural attenuation.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Environmental Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Society of Civil Engineers","doi":"10.1061/(ASCE)EE.1943-7870.0000597","usgsCitation":"Thomas, L., Widdowson, M., Chapelle, F.H., Novak, J., Boncal, J., and Lebron, C.A., 2012, Distribution of potentially bioavailable natural organic carbon in aquifer sediments at a chloroethene-contaminated site: Journal of Environmental Engineering, v. 139, no. 1, p. 54-60, https://doi.org/10.1061/(ASCE)EE.1943-7870.0000597.","productDescription":"7 p.","startPage":"54","endPage":"60","costCenters":[],"links":[{"id":291162,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":291160,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/(ASCE)EE.1943-7870.0000597"}],"country":"United States","state":"South Carolina","city":"Parris Island","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -80.710797,32.319317 ], [ -80.710797,32.338174 ], [ -80.678783,32.338174 ], [ -80.678783,32.319317 ], [ -80.710797,32.319317 ] ] ] } } ] }","volume":"139","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57f7f3c1e4b0bc0bec0a0b7d","contributors":{"authors":[{"text":"Thomas, L.K.","contributorId":66608,"corporation":false,"usgs":true,"family":"Thomas","given":"L.K.","email":"","affiliations":[],"preferred":false,"id":496730,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Widdowson, M.A.","contributorId":46262,"corporation":false,"usgs":true,"family":"Widdowson","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":496729,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chapelle, F. H.","contributorId":101697,"corporation":false,"usgs":true,"family":"Chapelle","given":"F.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":496732,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Novak, J.T.","contributorId":86559,"corporation":false,"usgs":true,"family":"Novak","given":"J.T.","email":"","affiliations":[],"preferred":false,"id":496731,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Boncal, J.E.","contributorId":14309,"corporation":false,"usgs":true,"family":"Boncal","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":496728,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lebron, C. A.","contributorId":102810,"corporation":false,"usgs":true,"family":"Lebron","given":"C.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":496733,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
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