No abstract available.
","language":"English","publisher":"Florida Academy of Sciences","usgsCitation":"Loftus, W., 2000, Inventory of the fishes of Everglades National Park: Florida Scientist, v. 63, p. 27-47.","productDescription":"21 p.","startPage":"27","endPage":"47","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":566,"text":"Southeast Ecological Science Center","active":true,"usgs":true}],"links":[{"id":314597,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"63","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56a20f4ae4b0961cf2811bf5","contributors":{"authors":[{"text":"Loftus, W.F.","contributorId":29363,"corporation":false,"usgs":true,"family":"Loftus","given":"W.F.","email":"","affiliations":[],"preferred":false,"id":589232,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70022555,"text":"70022555 - 2000 - Global characteristics of stream flow seasonality and variability","interactions":[],"lastModifiedDate":"2022-08-30T17:50:10.704218","indexId":"70022555","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2344,"text":"Journal of Hydrometeorology","active":true,"publicationSubtype":{"id":10}},"title":"Global characteristics of stream flow seasonality and variability","docAbstract":"Monthly stream flow series from 1345 sites around the world are used to characterize geographic differences in the seasonality and year-to-year variability of stream flow. Stream flow seasonality varies regionally, depending on the timing of maximum precipitation, evapotranspiration, and contributions from snow and ice. Lags between peaks of precipitation and stream flow vary smoothly from long delays in high-latitude and mountainous regions to short delays in the warmest sectors. Stream flow is most variable from year to year in dry regions of the southwest United States and Mexico, the Sahel, and southern continents, and it varies more (relatively) than precipitation in the same regions. Tropical rivers have the steadiest flows. El Niño variations are correlated with stream flow in many parts of the Americas, Europe, and Australia. Many stream flow series from North America, Europe, and the Tropics reflect North Pacific climate, whereas series from the eastern United States, Europe, and tropical South America and Africa reflect North Atlantic climate variations.
","language":"English","publisher":"American Meteorological Society","doi":"10.1175/1525-7541(2000)001<0289:GCOSFS>2.0.CO;2","issn":"1525755X","usgsCitation":"Dettinger, M.D., and Diaz, H.F., 2000, Global characteristics of stream flow seasonality and variability: Journal of Hydrometeorology, v. 1, no. 4, p. 289-310, https://doi.org/10.1175/1525-7541(2000)001<0289:GCOSFS>2.0.CO;2.","productDescription":"22 p.","startPage":"289","endPage":"310","costCenters":[],"links":[{"id":479248,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1175/1525-7541(2000)001<0289:gcosfs>2.0.co;2","text":"Publisher Index Page"},{"id":230619,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Earth","volume":"1","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a293de4b0c8380cd5a7a5","contributors":{"authors":[{"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":394065,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Diaz, Henry F.","contributorId":68476,"corporation":false,"usgs":true,"family":"Diaz","given":"Henry","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":394064,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70022517,"text":"70022517 - 2000 - Gap analysis: Concepts, methods, and recent results","interactions":[],"lastModifiedDate":"2012-03-12T17:19:44","indexId":"70022517","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2602,"text":"Landscape Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Gap analysis: Concepts, methods, and recent results","docAbstract":"Rapid progress is being made in the conceptual, technical, and organizational requirements for generating synoptic multi-scale views of the earth's surface and its biological content. Using the spatially comprehensive data that are now available, researchers, land managers, and land-use planners can, for the first time, quantitatively place landscape units - from general categories such as 'Forests' or 'Cold-Deciduous Shrubland Formation' to more categories such as 'Picea glauca-Abies balsamea-Populus spp. Forest Alliance' - in their large-area contexts. The National Gap Analysis Program (GAP) has developed the technical and organizational capabilities necessary for the regular production and analysis of such information. This paper provides a brief overview of concepts and methods as well as some recent results from the GAP projects. Clearly, new frameworks for biogeographic information and organizational cooperation are needed if we are to have any hope of documenting the full range of species occurrences and ecological processes in ways meaningful to their management. The GAP experience provides one model for achieving these new frameworks.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Landscape Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1023/A:1008184408300","issn":"09212973","usgsCitation":"Jennings, M., 2000, Gap analysis: Concepts, methods, and recent results: Landscape Ecology, v. 15, no. 1, p. 5-20, https://doi.org/10.1023/A:1008184408300.","startPage":"5","endPage":"20","numberOfPages":"16","costCenters":[],"links":[{"id":206732,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1023/A:1008184408300"},{"id":230652,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a14b6e4b0c8380cd54b21","contributors":{"authors":[{"text":"Jennings, M.D.","contributorId":53976,"corporation":false,"usgs":true,"family":"Jennings","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":393901,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70022398,"text":"70022398 - 2000 - Relations of habitat-specific algal assemblages to land use and water chemistry in the Willamette Basin, Oregon","interactions":[],"lastModifiedDate":"2012-03-12T17:19:42","indexId":"70022398","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Relations of habitat-specific algal assemblages to land use and water chemistry in the Willamette Basin, Oregon","docAbstract":"Benthic algal assemblages, water chemistry, and habitat were characterized at 25 stream sites in the Willamette Basin, Oregon, during low flow in 1994. Seventy-three algal samples yielded 420 taxa - Mostly diatoms, blue-green algae, and green algae. Algal assemblages from depositional samples were strongly dominated by diatoms (76% mean relative abundance), whereas erosional samples were dominated by blue-green algae (68% mean relative abundance). Canonical correspondence analysis (CCA) of semiquantitative and qualitative (presence/absence) data sets identified four environmental variables (maximum specific conductance, % open canopy, pH, and drainage area) that were significant in describing patterns of algal taxa among sites. Based on CCA, four groups of sites were identified: Streams in forested basins that supported oligotrophic taxa, such as Diatoma mesodon; small streams in agricultural and urban basins that contained a variety of eutrophic and nitrogen-heterotrophic algal taxa; larger rivers draining areas of mixed land use that supported planktonic, eutrophic, and nitrogen-heterotrophic algal taxa; and streams with severely degraded or absent riparian vegetation (> 75% open canopy) that were dominated by other planktonic, eutrophic, and nitrogen-heterotrophic algal taxa. Patterns in water chemistry were consistent with the algal autecological interpretations and clearly demonstrated relationships between land use, water quality, and algal distribution patterns.","largerWorkTitle":"Environmental Monitoring and Assessment","language":"English","publisherLocation":"Kluwer Academic Publishers","doi":"10.1023/A:1006460802772","issn":"01676369","usgsCitation":"Carpenter, K., and Waite, I., 2000, Relations of habitat-specific algal assemblages to land use and water chemistry in the Willamette Basin, Oregon, in Environmental Monitoring and Assessment, v. 64, no. 1, p. 247-257, https://doi.org/10.1023/A:1006460802772.","startPage":"247","endPage":"257","numberOfPages":"11","costCenters":[],"links":[{"id":206694,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1023/A:1006460802772"},{"id":230573,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"64","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a716e4b0e8fec6cdc383","contributors":{"authors":[{"text":"Carpenter, K.D.","contributorId":97274,"corporation":false,"usgs":true,"family":"Carpenter","given":"K.D.","email":"","affiliations":[],"preferred":false,"id":393491,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Waite, I.R.","contributorId":41039,"corporation":false,"usgs":true,"family":"Waite","given":"I.R.","email":"","affiliations":[],"preferred":false,"id":393490,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70022715,"text":"70022715 - 2000 - Guidelines for model calibration and application to flow simulation in the Death Valley regional groundwater system","interactions":[],"lastModifiedDate":"2012-03-12T17:20:37","indexId":"70022715","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Guidelines for model calibration and application to flow simulation in the Death Valley regional groundwater system","docAbstract":"Fourteen guidelines are described which are intended to produce calibrated groundwater models likely to represent the associated real systems more accurately than typically used methods. The 14 guidelines are discussed in the context of the calibration of a regional groundwater flow model of the Death Valley region in the southwestern United States. This groundwater flow system contains two sites of national significance from which the subsurface transport of contaminants could be or is of concern: Yucca Mountain, which is the potential site of the United States high-level nuclear-waste disposal; and the Nevada Test Site, which contains a number of underground nuclear-testing locations. This application of the guidelines demonstrates how they may be used for model calibration and evaluation, and also to direct further model development and data collection.Fourteen guidelines are described which are intended to produce calibrated groundwater models likely to represent the associated real systems more accurately than typically used methods. The 14 guidelines are discussed in the context of the calibration of a regional groundwater flow model of the Death Valley region in the southwestern United States. This groundwater flow system contains two sites of national significance from which the subsurface transport of contaminants could be or is of concern: Yucca Mountain, which is the potential site of the United States high-level nuclear-waste disposal; and the Nevada Test Site, which contains a number of underground nuclear-testing locations. This application of the guidelines demonstrates how they may be used for model calibration and evaluation, and also to direct further model development and data collection.","largerWorkTitle":"IAHS-AISH Publication","conferenceTitle":"ModelCARE'99 Conference","conferenceDate":"20 September 1999 through 23 September 1999","conferenceLocation":"Zurich, Switz","language":"English","publisher":"IAHS","publisherLocation":"Houston, TX, United States","issn":"01447815","usgsCitation":"Hill, M.C., D’Agnese, F.A., and Faunt, C., 2000, Guidelines for model calibration and application to flow simulation in the Death Valley regional groundwater system, in IAHS-AISH Publication, no. 265, Zurich, Switz, 20 September 1999 through 23 September 1999, p. 195-204.","startPage":"195","endPage":"204","numberOfPages":"10","costCenters":[],"links":[{"id":233853,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"265","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2e45e4b0c8380cd5c3f7","contributors":{"authors":[{"text":"Hill, M. C.","contributorId":48993,"corporation":false,"usgs":true,"family":"Hill","given":"M.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":394641,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"D’Agnese, F. A.","contributorId":6096,"corporation":false,"usgs":true,"family":"D’Agnese","given":"F.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":394640,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Faunt, C.C. 0000-0001-5659-7529","orcid":"https://orcid.org/0000-0001-5659-7529","contributorId":103314,"corporation":false,"usgs":true,"family":"Faunt","given":"C.C.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":394642,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70022625,"text":"70022625 - 2000 - Selenium concentrations in the Colorado pikeminnow (Ptychocheilus lucius): Relationship with flows in the upper Colorado River","interactions":[],"lastModifiedDate":"2012-03-12T17:20:08","indexId":"70022625","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":887,"text":"Archives of Environmental Contamination and Toxicology","active":true,"publicationSubtype":{"id":10}},"title":"Selenium concentrations in the Colorado pikeminnow (Ptychocheilus lucius): Relationship with flows in the upper Colorado River","docAbstract":"A Department of the Interior (DOI) irrigation drainwater study of the Uncompahgre Project area and the Grand Valley in western Colorado revealed high selenium concentrations in water, sediment, and biota samples. The lower Gunnison River and the Colorado River in the study area are designated critical habitat for the endangered Colorado pikeminnow (Ptychocheilus lucius) and razorback sucker (Xyrauchen texanus). Because of the endangered status of these fish, sacrificing individuals for tissue residue analysis has been avoided; consequently, little information existed regarding selenium tissue residues. In 1994, muscle plugs were collected from a total of 39 Colorado pikeminnow captured at various Colorado River sites in the Grand Valley for selenium residue analysis. The muscle plugs collected from 16 Colorado pikeminnow captured at Walter Walker State Wildlife Area (WWSWA) contained a mean selenium concentration of 17 ??g/g dry weight, which was over twice the recommended toxic threshold guideline concentration of 8 ??g/g dry weight in muscle tissue for freshwater fish. Because of elevated selenium concentrations in muscle plugs in 1994, a total of 52 muscle plugs were taken during 1995 from Colorado pikeminnow staging at WWSWA. Eleven of these plugs were from fish previously sampled in 1994. Selenium concentrations in 9 of the 11 recaptured fish were significantly lower in 1995 than in 1994. Reduced selenium in fish may in part be attributed to higher instream flows in 1995 and lower water selenium concentrations in the Colorado River in the Grand Valley. In 1996, muscle plugs were taken from 35 Colorado squawfish captured at WWSWA, and no difference in mean selenium concentrations were detected from those sampled in 1995. Colorado River flows during 1996 were intermediate to those measured in 1994 and 1995.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Archives of Environmental Contamination and Toxicology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s002449910063","issn":"00904341","usgsCitation":"Osmundson, B.C., May, T., and Osmundson, D., 2000, Selenium concentrations in the Colorado pikeminnow (Ptychocheilus lucius): Relationship with flows in the upper Colorado River: Archives of Environmental Contamination and Toxicology, v. 38, no. 4, p. 479-485, https://doi.org/10.1007/s002449910063.","startPage":"479","endPage":"485","numberOfPages":"7","costCenters":[],"links":[{"id":208110,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s002449910063"},{"id":233560,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8cf0e4b08c986b3181c2","contributors":{"authors":[{"text":"Osmundson, B. C.","contributorId":15655,"corporation":false,"usgs":true,"family":"Osmundson","given":"B.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":394292,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"May, T.W.","contributorId":75878,"corporation":false,"usgs":true,"family":"May","given":"T.W.","email":"","affiliations":[],"preferred":false,"id":394294,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Osmundson, D.B.","contributorId":50328,"corporation":false,"usgs":true,"family":"Osmundson","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":394293,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70022425,"text":"70022425 - 2000 - Intensification of the Northeast Pacific oxygen minimum zone during the Bölling-Alleröd warm period","interactions":[],"lastModifiedDate":"2015-05-13T09:13:18","indexId":"70022425","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3002,"text":"Paleoceanography","active":true,"publicationSubtype":{"id":10}},"title":"Intensification of the Northeast Pacific oxygen minimum zone during the Bölling-Alleröd warm period","docAbstract":"Although climate records from several locations around the world show nearly synchronous and abrupt changes, the nature of the inferred teleconnection is still poorly understood. On the basis of preserved laminations and molybdenum enrichments in open margin sediments we demonstrate that the oxygen content of northeast Pacific waters at 800 m depth during the Bölling-Alleröd warm period (15–13 kyr) was greatly reduced. Existing oxygen isotopic records of benthic and planktonic foraminifera suggest that this was probably due to suppressed ventilation at higher latitudes of the North Pacific. Comparison with ventilation records for the North Atlantic indicates an antiphased pattern of convection relative to the North Pacific over the past 22 kyr, perhaps due to variations in water vapor transport across Central America.
","language":"English","publisher":"Wiley","doi":"10.1029/1999PA000473","issn":"08838305","usgsCitation":"Zheng, Y., van Geen, A., Anderson, R.F., Gardner, J., and Dean, W.E., 2000, Intensification of the Northeast Pacific oxygen minimum zone during the Bölling-Alleröd warm period: Paleoceanography, v. 15, no. 5, p. 528-536, https://doi.org/10.1029/1999PA000473.","productDescription":"9 p.","startPage":"528","endPage":"536","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":230381,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":206613,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/1999PA000473"}],"volume":"15","issue":"5","noUsgsAuthors":false,"publicationDate":"2010-05-04","publicationStatus":"PW","scienceBaseUri":"505a3c99e4b0c8380cd62e93","contributors":{"authors":[{"text":"Zheng, Yen","contributorId":80842,"corporation":false,"usgs":true,"family":"Zheng","given":"Yen","email":"","affiliations":[],"preferred":false,"id":393585,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"van Geen, Alexander","contributorId":36876,"corporation":false,"usgs":true,"family":"van Geen","given":"Alexander","email":"","affiliations":[],"preferred":false,"id":393586,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anderson, Robert F.","contributorId":14139,"corporation":false,"usgs":true,"family":"Anderson","given":"Robert","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":393583,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gardner, James V.","contributorId":61769,"corporation":false,"usgs":true,"family":"Gardner","given":"James V.","affiliations":[],"preferred":false,"id":393584,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"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":393587,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70022696,"text":"70022696 - 2000 - Evaporation from groundwater discharge playas, Estancia Basin, central New Mexico","interactions":[],"lastModifiedDate":"2013-12-03T11:45:04","indexId":"70022696","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1844,"text":"Global and Planetary Change","active":true,"publicationSubtype":{"id":10}},"title":"Evaporation from groundwater discharge playas, Estancia Basin, central New Mexico","docAbstract":"Bowen ratio meteorological stations have been deployed to measure rates of evaporation from groundwater discharge playas and from an adjacent vegetated bench in the Estancia Basin, in central New Mexico. The playas are remnants of late Pleistocene pluvial Lake Estancia and are discharge areas for groundwater originating as precipitation in the adjacent Manzano Mts. They also accumulate water during local precipitation events. Evaporation is calculated from measured values of net radiation, soil heat flux, atmospheric temperature, and relative humidity. Evaporation rates are strongly dependent on the presence or absence of standing water in the playas, with rates increasing more than 600% after individual rainstorms. Evaporation at site E-12, in the southeastern part of the playa Complex, measured 74 cm over a yearlong period from mid-1997 through mid-1998. This value compares favorably to earlier estimates from northern Estancia playas, but is nearly three times greater than evaporation at a similar playa in western Utah. Differences in geographical position, salt crust composition, and physical properties may explain some of the difference in evaporation rates in these two geographic regions.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Global and Planetary Change","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0921-8181(00)00025-4","issn":"09218181","usgsCitation":"Menking, K.M., Anderson, R.Y., Brunsell, N.A., Allen, B.D., Ellwein, A.L., Loveland, T.A., and Hostetler, S.W., 2000, Evaporation from groundwater discharge playas, Estancia Basin, central New Mexico: Global and Planetary Change, v. 25, no. 1-2, p. 133-147, https://doi.org/10.1016/S0921-8181(00)00025-4.","startPage":"133","endPage":"147","numberOfPages":"15","costCenters":[],"links":[{"id":208113,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0921-8181(00)00025-4"},{"id":233565,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"25","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d10e4b0c8380cd52de3","contributors":{"authors":[{"text":"Menking, Kirsten M.","contributorId":53564,"corporation":false,"usgs":true,"family":"Menking","given":"Kirsten","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":394577,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, Roger Y.","contributorId":19251,"corporation":false,"usgs":true,"family":"Anderson","given":"Roger","email":"","middleInitial":"Y.","affiliations":[],"preferred":false,"id":394575,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brunsell, Nathaniel A.","contributorId":70567,"corporation":false,"usgs":true,"family":"Brunsell","given":"Nathaniel","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":394578,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Allen, Bruce D.","contributorId":70568,"corporation":false,"usgs":true,"family":"Allen","given":"Bruce","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":394579,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ellwein, Amy L.","contributorId":35916,"corporation":false,"usgs":true,"family":"Ellwein","given":"Amy","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":394576,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Loveland, Thomas A.","contributorId":14156,"corporation":false,"usgs":true,"family":"Loveland","given":"Thomas","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":394574,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hostetler, Steven W. 0000-0003-2272-8302 swhostet@usgs.gov","orcid":"https://orcid.org/0000-0003-2272-8302","contributorId":3249,"corporation":false,"usgs":true,"family":"Hostetler","given":"Steven","email":"swhostet@usgs.gov","middleInitial":"W.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"preferred":true,"id":394573,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70043755,"text":"70043755 - 2000 - New Publications of the U.S. Geological Survey, April-June 2000","interactions":[],"lastModifiedDate":"2013-05-23T11:14:30","indexId":"70043755","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":6,"text":"USGS Unnumbered Series"},"seriesTitle":{"id":378,"text":"Publications of the US Geological Survey","active":false,"publicationSubtype":{"id":6}},"title":"New Publications of the U.S. Geological Survey, April-June 2000","docAbstract":"A list of USGS publications and articles by U.S. Geological Survey personnel in non-U.S. Geological Survey journals and books that were published in April to June of the year 2000.","language":"English","publisher":"U.S. Government Printing Office","publisherLocation":"Washington, D.C.","doi":"10.3133/70043755","usgsCitation":"Water Resources Division, U.S. Geological Survey, 2000, New Publications of the U.S. Geological Survey, April-June 2000: Publications of the US Geological Survey, 64 p., https://doi.org/10.3133/70043755.","productDescription":"64 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":272692,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/unnumbered/70043755/report.pdf"},{"id":267775,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/unnumbered/70043755/report-thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5124ad55e4b0b6328103b4a4","contributors":{"authors":[{"text":"Water Resources Division, U.S. Geological Survey","contributorId":128075,"corporation":true,"usgs":false,"organization":"Water Resources Division, U.S. Geological Survey","id":535429,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70022623,"text":"70022623 - 2000 - A field technique for estimating aquifer parameters using flow log data","interactions":[],"lastModifiedDate":"2018-12-10T07:27:11","indexId":"70022623","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"A field technique for estimating aquifer parameters using flow log data","docAbstract":"A numerical model is used to predict flow along intervals between producing zones in open boreholes for comparison with measurements of borehole flow. The model gives flow under quasi-steady conditions as a function of the transmissivity and hydraulic head in an arbitrary number of zones communicating with each other along open boreholes. The theory shows that the amount of inflow to or outflow from the borehole under any one flow condition may not indicate relative zone transmissivity. A unique inversion for both hydraulic-head and transmissivity values is possible if flow is measured under two different conditions such as ambient and quasi-steady pumping, and if the difference in open-borehole water level between the two flow conditions is measured. The technique is shown to give useful estimates of water levels and transmissivities of two or more water-producing zones intersecting a single interval of open borehole under typical field conditions. Although the modeling technique involves some approximation, the principle limit on the accuracy of the method under field conditions is the measurement error in the flow log data. Flow measurements and pumping conditions are usually adjusted so that transmissivity estimates are most accurate for the most transmissive zones, and relative measurement error is proportionately larger for less transmissive zones. The most effective general application of the borehole-flow model results when the data are fit to models that systematically include more production zones of progressively smaller transmissivity values until model results show that all accuracy in the data set is exhausted.A numerical model is used to predict flow along intervals between producing zones in open boreholes for comparison with measurements of borehole flow. The model gives flow under quasi-steady conditions as a function of the transmissivity and hydraulic head in an arbitrary number of zones communicating with each other along open boreholes. The theory shows that the amount of inflow to or outflow from the borehole under any one flow condition may not indicate relative zone transmissivity. A unique inversion for both hydraulic-head and transmissivity values is possible if flow is measured under two different conditions such as ambient and quasi-steady pumping, and if the difference in open-borehole water level between the two flow conditions is measured. The technique is shown to give useful estimates of water levels and transmissivities of two or more water-producing zones intersecting a single interval of open borehole under typical field conditions. Although the modeling technique involves some approximation, the principle limit on the accuracy of the method under field conditions is the measurement error in the flow log data. Flow measurements and pumping conditions are usually adjusted so that transmissivity estimates are most accurate for the most transmissive zones, and relative measurement error is proportionately larger for less transmissive zones. The most effective general application of the borehole-flow model results when the data are fit to models that symmetrically include more production zones of progressively smaller transmissivity values until model results show that all accuracy in the data set is exhausted.","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.2000.tb00243.x","issn":"0017467X","usgsCitation":"Paillet, F.L., 2000, A field technique for estimating aquifer parameters using flow log data: Ground Water, v. 38, no. 4, p. 510-521, https://doi.org/10.1111/j.1745-6584.2000.tb00243.x.","productDescription":"12 p.","startPage":"510","endPage":"521","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":230473,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"4","noUsgsAuthors":false,"publicationDate":"2005-08-04","publicationStatus":"PW","scienceBaseUri":"5059e3d6e4b0c8380cd4624d","contributors":{"authors":[{"text":"Paillet, Frederick L.","contributorId":63820,"corporation":false,"usgs":true,"family":"Paillet","given":"Frederick","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":394289,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70022428,"text":"70022428 - 2000 - Aseismic inflation of Westdahl volcano, Alaska, revealed by satellite radar interferometry","interactions":[],"lastModifiedDate":"2017-04-07T15:15:12","indexId":"70022428","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","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":"Aseismic inflation of Westdahl volcano, Alaska, revealed by satellite radar interferometry","docAbstract":"Westdahl volcano, located at the west end of Unimak Island in the central Aleutian volcanic arc, Alaska, is a broad shield that produced moderate-sized eruptions in 1964, 1978-79, and 1991-92. Satellite radar interferometry detected about 17 cm of volcano-wide inflation from September 1993 to October 1998. Multiple independent interferograms reveal that the deformation rate has not been steady; more inflation occurred from 1993 to 1995 than from 1995 to 1998. Numerical modeling indicates that a source located about 9 km beneath the center of the volcano inflated by about 0.05 km3 from 1993 to 1998. On the basis of the timing and volume of recent eruptions at Westdahl and the fact that it has been inflating for more than 5 years, the next eruption can be expected within the next several years.","language":"English","publisher":"AGU","doi":"10.1029/1999GL011283","issn":"00948276","usgsCitation":"Lu, Z., Wicks, C., Dzurisin, D., Thatcher, W., Freymueller, J., McNutt, S., and Mann, D., 2000, Aseismic inflation of Westdahl volcano, Alaska, revealed by satellite radar interferometry: Geophysical Research Letters, v. 27, no. 11, p. 1567-1570, https://doi.org/10.1029/1999GL011283.","productDescription":"4 p.","startPage":"1567","endPage":"1570","numberOfPages":"4","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":479346,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/1999gl011283","text":"Publisher Index Page"},{"id":230384,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":206614,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/1999GL011283"}],"volume":"27","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059edb7e4b0c8380cd49977","contributors":{"authors":[{"text":"Lu, Z.","contributorId":106241,"corporation":false,"usgs":true,"family":"Lu","given":"Z.","affiliations":[],"preferred":false,"id":393597,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wicks, Charles 0000-0002-0809-1328","orcid":"https://orcid.org/0000-0002-0809-1328","contributorId":9023,"corporation":false,"usgs":true,"family":"Wicks","given":"Charles","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":393591,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dzurisin, D.","contributorId":76067,"corporation":false,"usgs":true,"family":"Dzurisin","given":"D.","email":"","affiliations":[],"preferred":false,"id":393596,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Thatcher, W.","contributorId":32669,"corporation":false,"usgs":true,"family":"Thatcher","given":"W.","email":"","affiliations":[],"preferred":false,"id":393593,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Freymueller, J.T.","contributorId":51482,"corporation":false,"usgs":true,"family":"Freymueller","given":"J.T.","email":"","affiliations":[],"preferred":false,"id":393594,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"McNutt, S.R.","contributorId":26722,"corporation":false,"usgs":true,"family":"McNutt","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":393592,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Mann, Dorte","contributorId":66876,"corporation":false,"usgs":true,"family":"Mann","given":"Dorte","affiliations":[],"preferred":false,"id":393595,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70022698,"text":"70022698 - 2000 - A review of the contrasting behavior of two magmatic volatiles: Chlorine and carbon dioxide","interactions":[],"lastModifiedDate":"2012-03-12T17:20:39","indexId":"70022698","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"A review of the contrasting behavior of two magmatic volatiles: Chlorine and carbon dioxide","docAbstract":"Chlorine (Cl) and carbon dioxide (CO2) are common magmatic volatiles with contrasting behaviors. CO2 solubility increases with pressure whereas Cl solubility shows relatively little pressure or temperature effect. CO2 speciation changes with silicate melt composition, dissolving as carbonate in basaltic magmas and molecular CO2 in more silicic compositions. In H2O-bearing systems, the strongly non-ideal behavior of alkali chlorides causes unmixing of the volatile phase to form a H2O-rich vapor and a hydrosaline phase with important implications for the maximum concentration of Cl in magmas. Addition of CO2 to magma hastens immiscibility at crustal pressures (<500 MPa), inducing the formation of CO2-rich vapors and Cl-rich hydrosaline melts. (C) 2000 Elsevier Science B.V. All rights reserved.Chlorine (Cl) and carbon dioxide (CO2) are common magmatic volatiles with contrasting behaviors. CO2 solubility increases with pressure whereas Cl solubility shows relatively little pressure or temperature effect. CO2 speciation changes with silicate melt composition, dissolving as carbonate in basaltic magmas and molecular CO2 in more silicic compositions. In H2O-bearing systems, the strongly non-ideal behavior of alkali chlorides causes unmixing of the volatile phase to form a H2O-rich vapor and a hydrosaline phase with important implications for the maximum concentration of Cl in magmas. Addition of CO2 to magma hastens immiscibility at crustal pressures (<500 MPa), inducing the formation of CO2-rich vapors and Cl-rich hydrosaline melts.","largerWorkTitle":"Journal of Geochemical Exploration","conferenceTitle":"Geofluids III - 3rd International Conference on Fluid Evolution, Migration and Interaction in Sedimentary Basins and Orogenic Belts","conferenceDate":"12 July 2000 through 14 July 2000","conferenceLocation":"Barcelona, Spain","language":"English","publisher":"Elsevier Science Publishers B.V.","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/S0375-6742(00)00075-3","issn":"03756742","usgsCitation":"Lowenstern, J.B., 2000, A review of the contrasting behavior of two magmatic volatiles: Chlorine and carbon dioxide, in Journal of Geochemical Exploration, v. 69-70, Barcelona, Spain, 12 July 2000 through 14 July 2000, p. 287-290, https://doi.org/10.1016/S0375-6742(00)00075-3.","startPage":"287","endPage":"290","numberOfPages":"4","costCenters":[],"links":[{"id":208126,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0375-6742(00)00075-3"},{"id":233600,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"69-70","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e558e4b0c8380cd46cd4","contributors":{"authors":[{"text":"Lowenstern, J. B.","contributorId":7737,"corporation":false,"usgs":true,"family":"Lowenstern","given":"J.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":394585,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70022699,"text":"70022699 - 2000 - Reservoir characterization of marine and permafrost associated gas hydrate accumulations with downhole well logs","interactions":[],"lastModifiedDate":"2012-03-12T17:20:39","indexId":"70022699","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Reservoir characterization of marine and permafrost associated gas hydrate accumulations with downhole well logs","docAbstract":"Gas volumes that may be attributed to a gas hydrate accumulation depend on a number of reservoir parameters, one of which, gas-hydrate saturation, can be assessed with data obtained from downhole well-logging devices. This study demonstrates that electrical resistivity and acoustic transit-time downhole log data can be used to quantify the amount of gas hydrate in a sedimentary section. Two unique forms of the Archie relation (standard and quick look relations) have been used in this study to calculate water saturations (S(w)) [gas-hydrate saturation (S(h)) is equal to (1.0 - S(w))] from the electrical resistivity log data in four gas hydrate accumulations. These accumulations are located on (1) the Blake Ridge along the Southeastern continental margin of the United States, (2) the Cascadia continental margin off the pacific coast of Canada, (3) the North Slope of Alaska, and (4) the Mackenzie River Delta of Canada. Compressional wave acoustic log data have also been used in conjunction with the Timur, modified Wood, and the Lee weighted average acoustic equations to calculate gas-hydrate saturations in all four areas assessed.","largerWorkTitle":"Annals of the New York Academy of Sciences","language":"English","issn":"00778923","usgsCitation":"Collett, T.S., and Lee, M.W., 2000, Reservoir characterization of marine and permafrost associated gas hydrate accumulations with downhole well logs, in Annals of the New York Academy of Sciences, v. 912, p. 51-64.","startPage":"51","endPage":"64","numberOfPages":"14","costCenters":[],"links":[{"id":233601,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"912","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa950e4b0c8380cd85d32","contributors":{"authors":[{"text":"Collett, T. S. 0000-0002-7598-4708","orcid":"https://orcid.org/0000-0002-7598-4708","contributorId":86342,"corporation":false,"usgs":true,"family":"Collett","given":"T.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":394587,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lee, Myung W.","contributorId":84358,"corporation":false,"usgs":true,"family":"Lee","given":"Myung","middleInitial":"W.","affiliations":[],"preferred":false,"id":394586,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70022620,"text":"70022620 - 2000 - Bleached chondrules: Evidence for widespread aqueous processes on the parent asteroids of ordinary chondrites","interactions":[],"lastModifiedDate":"2022-08-18T17:25:27.355743","indexId":"70022620","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2715,"text":"Meteoritics and Planetary Science","active":true,"publicationSubtype":{"id":10}},"title":"Bleached chondrules: Evidence for widespread aqueous processes on the parent asteroids of ordinary chondrites","docAbstract":"We present the first detailed study of a population of texturally distinct chondrules previously described by Kurat (1969), Christophe Michel-Lévy (1976), and Skinner et al. (1989) that are sharply depleted in alkalis and Al in their outer portions. These “bleached” chondrules, which are exclusively radial pyroxene and cryptocrystalline in texture, have porous outer zones where mesostasis has been lost. Bleached chondrules are present in all type 3 ordinary chondrites and are present in lower abundances in types 4–6. They are most abundant in the L and LL groups, apparently less common in H chondrites, and absent in enstatite chondrites. We used x-ray mapping and traditional electron microprobe techniques to characterize bleached chondrules in a cross section of ordinary chondrites. We studied bleached chondrules from Semarkona by ion microprobe for trace elements and H isotopes, and by transmission electron microscopy. Chondrule bleaching was the result of low-temperature alteration by aqueous fluids flowing through finegrained chondrite matrix prior to thermal metamorphism. During aqueous alteration, interstitial glass dissolved and was partially replaced by phyllosilicates, troilite was altered to pentlandite, but pyroxene was completely unaffected. Calcium-rich zones formed at the inner margins of the bleached zones, either as the result of the early stages of metamorphism or because of fluid-chondrule reaction. The mineralogy of bleached chondrules is extremely sensitive to thermal metamorphism in type 3 ordinary chondrites, and bleached zones provide a favorable location for the growth of metamorphic minerals in higher petrologic types. The ubiquitous presence of bleached chondrules in ordinary chondrites implies that they all experienced aqueous alteration early in their asteroidal histories, but there is no relationship between the degree of alteration and metamorphic grade. A correlation between the oxidation state of chondrite groups and their degree of aqueous alteration is consistent with the source of water being either accreted ices or water released during oxidation of organic matter. Ordinary chondrites were probably open systems after accretion, and aqueous fluids may have carried volatile elements with them during dehydration. Individual radial pyroxene and cryptocrystalline chondrules were certainly open systems in all chondrites that experienced aqueous alteration leading to bleaching.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1945-5100.2000.tb01429.x","issn":"10869379","usgsCitation":"Grossman, J.N., Alexander, C.M., Wang, J., and Brearley, A., 2000, Bleached chondrules: Evidence for widespread aqueous processes on the parent asteroids of ordinary chondrites: Meteoritics and Planetary Science, v. 35, no. 3, p. 467-486, https://doi.org/10.1111/j.1945-5100.2000.tb01429.x.","productDescription":"20 p.","startPage":"467","endPage":"486","costCenters":[],"links":[{"id":479303,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1945-5100.2000.tb01429.x","text":"Publisher Index Page"},{"id":230435,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"35","issue":"3","noUsgsAuthors":false,"publicationDate":"2010-02-04","publicationStatus":"PW","scienceBaseUri":"5059f1e1e4b0c8380cd4ae99","contributors":{"authors":[{"text":"Grossman, J. N.","contributorId":41840,"corporation":false,"usgs":true,"family":"Grossman","given":"J.","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":394278,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Alexander, C. M. O’D.","contributorId":105418,"corporation":false,"usgs":false,"family":"Alexander","given":"C.","email":"","middleInitial":"M. O’D.","affiliations":[],"preferred":false,"id":394280,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wang, Jingyuan","contributorId":10771,"corporation":false,"usgs":false,"family":"Wang","given":"Jingyuan","email":"","affiliations":[],"preferred":false,"id":394277,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brearley, A.J.","contributorId":73773,"corporation":false,"usgs":true,"family":"Brearley","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":394279,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70022673,"text":"70022673 - 2000 - Isotope hydrology dynamics of riverine wetlands in the Kankakee Watershed, Indiana","interactions":[],"lastModifiedDate":"2022-08-25T15:52:46.173875","indexId":"70022673","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Isotope hydrology dynamics of riverine wetlands in the Kankakee Watershed, Indiana","docAbstract":"Wetland restoration activities may disturb shallow ground-water flow dynamics. There may be unintentional sources of water flowing into a constructed wetland that could compromise the long-term viability of a wetland function. Measurement of naturally-occurring isotopes in the hydrosphere can provide an indication of provenance, flow paths or components, and residence times or ages of wetland ground-water flow systems. Hydraulic head measurements may not provide sufficient detail of shallow flow disturbances and can be complemented by analyzing isotopes in waters flowing through the wetland. Two north-central Indiana wetlands in the Kankakee watershed are being studied to determine the adequacy of wetland restoration activities. The native LaSalle wetland and the restored Hog Marsh wetland have contrasting ground-water flow regimes. The conservative water isotopes 18O, 2H, and 3H, and selected solute isotopes 13C, 14C, 15N, 34S, 87Sr, and 206–208Pb, demonstrate the complexity of ground-water flow in Hog Marsh compared to the established flow regime at the LaSalle wetland.
","language":"English","publisher":"American Water Resources Association","publisherLocation":"Herndon, VA, United States","doi":"10.1111/j.1752-1688.2000.tb04305.x","issn":"1093474X","usgsCitation":"Sidle, W., Arihood, L., and Bayless, R., 2000, Isotope hydrology dynamics of riverine wetlands in the Kankakee Watershed, Indiana: Journal of the American Water Resources Association, v. 36, no. 4, p. 771-790, https://doi.org/10.1111/j.1752-1688.2000.tb04305.x.","productDescription":"20 p.","startPage":"771","endPage":"790","costCenters":[],"links":[{"id":233780,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Indiana","otherGeospatial":"Hog Marsh Wetland, Kankakee Watershed, LaSalle Wetland","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -87.506103515625,\n 40.697299008636755\n ],\n [\n -86.099853515625,\n 40.697299008636755\n ],\n [\n -86.099853515625,\n 41.75492216766298\n ],\n [\n -87.506103515625,\n 41.75492216766298\n ],\n [\n -87.506103515625,\n 40.697299008636755\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"36","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","scienceBaseUri":"505a3f8ae4b0c8380cd645e7","contributors":{"authors":[{"text":"Sidle, W.C.","contributorId":93911,"corporation":false,"usgs":true,"family":"Sidle","given":"W.C.","email":"","affiliations":[],"preferred":false,"id":394496,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Arihood, L.","contributorId":69752,"corporation":false,"usgs":true,"family":"Arihood","given":"L.","affiliations":[],"preferred":false,"id":394495,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bayless, R.","contributorId":18146,"corporation":false,"usgs":true,"family":"Bayless","given":"R.","email":"","affiliations":[],"preferred":false,"id":394494,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70022700,"text":"70022700 - 2000 - Spatial modeling of the geographic distribution of wildlife populations: A case study in the lower Mississippi River region","interactions":[],"lastModifiedDate":"2012-03-12T17:20:39","indexId":"70022700","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1458,"text":"Ecological Modelling","active":true,"publicationSubtype":{"id":10}},"title":"Spatial modeling of the geographic distribution of wildlife populations: A case study in the lower Mississippi River region","docAbstract":"A geographic information system (GIS)-based spatial modeling approach was developed to study environmental and land use impacts on the geographic distribution of wintering northern pintails (Arias acuta) in the Lower Mississippi River region. Pintails were fitted with backpack radio transmitter packages at Catahoula Lake, LA, in October 1992-1994 and located weekly through the following March. Pintail survey data were converted into a digital database in ARC/INFO GIS format and integrated with environmental GIS data through a customized modeling interface. The study verified the relationship between pintail distributions and major environmental factors and developed a conceptual relation model. Visualization-based spatial simulations were used to display the movement patterns of specific population groups under spatial and temporal constraints. The spatial modeling helped understand the seasonal movement patterns of pintails in relation to their habitat usage in Arkansas and southwestern Louisiana for wintering and interchange situations among population groups wintering in Texas and southeastern Louisiana. (C) 2000 Elsevier Science B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Modelling","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0304-3800(00)00307-0","issn":"03043800","usgsCitation":"Ji, W., and Jeske, C., 2000, Spatial modeling of the geographic distribution of wildlife populations: A case study in the lower Mississippi River region: Ecological Modelling, v. 132, no. 1-2, p. 95-104, https://doi.org/10.1016/S0304-3800(00)00307-0.","startPage":"95","endPage":"104","numberOfPages":"10","costCenters":[],"links":[{"id":233634,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208146,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0304-3800(00)00307-0"}],"volume":"132","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9488e4b08c986b31ab51","contributors":{"authors":[{"text":"Ji, W.","contributorId":40381,"corporation":false,"usgs":true,"family":"Ji","given":"W.","email":"","affiliations":[],"preferred":false,"id":394588,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jeske, C.","contributorId":79992,"corporation":false,"usgs":true,"family":"Jeske","given":"C.","email":"","affiliations":[],"preferred":false,"id":394589,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70022622,"text":"70022622 - 2000 - The fate of haloacetic acids and trihalomethanes in an aquifer storage and recovery program, Las Vegas, Nevada","interactions":[],"lastModifiedDate":"2018-12-10T09:54:27","indexId":"70022622","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"The fate of haloacetic acids and trihalomethanes in an aquifer storage and recovery program, Las Vegas, Nevada","docAbstract":"The fate of disinfection byproducts during aquifer storage and recovery (ASR) is evaluated for aquifers in Southern Nevada. Rapid declines of haloacetic acid (HAA) concentrations during ASR, with associated little change in Cl concentration, indicate that HAAs decline primarily by in situ microbial oxidation. Dilution is only a minor contributor to HAA concentration declines during ASR. Trihalomethane (THM) concentrations generally increased during storage of artificial recharge (AR) water and then declined during recovery. The decline of THM concentrations during recovery was primarily from dilution of current season AR water with residual AR water remaining in the aquifer from previous ASR seasons and native ground water. In more recent ASR seasons, for wells with the longest history of ASR, brominated THMs declined during storage and recovery by processes in addition to dilution. These conclusions about THMs are indicated by THM/Cl values and supported by a comparison of measured and model predicted THM concentrations. Geochemical mixing models were constructed using major-ion chemistry of the three end-member waters to calculate predicted THM concentrations. The decline in brominated THM concentrations in addition to that from dilution may result from biotransformation processes.","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.2000.tb00252.x","issn":"0017467X","usgsCitation":"Thomas, J.M., McKay, W., Colec, E., Landmeyer, J., and Bradley, P., 2000, The fate of haloacetic acids and trihalomethanes in an aquifer storage and recovery program, Las Vegas, Nevada: Ground Water, v. 38, no. 4, p. 605-614, https://doi.org/10.1111/j.1745-6584.2000.tb00252.x.","productDescription":"10 p.","startPage":"605","endPage":"614","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":230472,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Nevada","city":"Las Vegas","volume":"38","issue":"4","noUsgsAuthors":false,"publicationDate":"2005-08-04","publicationStatus":"PW","scienceBaseUri":"505babf9e4b08c986b3231b5","contributors":{"authors":[{"text":"Thomas, J. M.","contributorId":62217,"corporation":false,"usgs":true,"family":"Thomas","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":394285,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKay, W.A.","contributorId":63561,"corporation":false,"usgs":true,"family":"McKay","given":"W.A.","email":"","affiliations":[],"preferred":false,"id":394286,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Colec, E.","contributorId":101410,"corporation":false,"usgs":true,"family":"Colec","given":"E.","email":"","affiliations":[],"preferred":false,"id":394288,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Landmeyer, J. E.","contributorId":91140,"corporation":false,"usgs":true,"family":"Landmeyer","given":"J. E.","affiliations":[],"preferred":false,"id":394287,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bradley, P. M. 0000-0001-7522-8606","orcid":"https://orcid.org/0000-0001-7522-8606","contributorId":29465,"corporation":false,"usgs":true,"family":"Bradley","given":"P. M.","affiliations":[],"preferred":false,"id":394284,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70022695,"text":"70022695 - 2000 - Voluminous lava-like precursor to a major ash-flow tuff: Low-column pyroclastic eruption of the Pagosa Peak Dacite, San Juan volcanic field, Colorado","interactions":[],"lastModifiedDate":"2012-03-12T17:20:08","indexId":"70022695","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"Voluminous lava-like precursor to a major ash-flow tuff: Low-column pyroclastic eruption of the Pagosa Peak Dacite, San Juan volcanic field, Colorado","docAbstract":"The Pagosa Peak Dacite is an unusual pyroclastic deposit that immediately predated eruption of the enormous Fish Canyon Tuff (~5000 km3) from the La Garita caldera at 28 Ma. The Pagosa Peak Dacite is thick (to 1 km), voluminous (>200 km3), and has a high aspect ratio (1:50) similar to those of silicic lava flows. It contains a high proportion (40-60%) of juvenile clasts (to 3-4 m) emplaced as viscous magma that was less vesiculated than typical pumice. Accidental lithic fragments are absent above the basal 5-10% of the unit. Thick densely welded proximal deposits flowed rheomorphically due to gravitational spreading, despite the very high viscosity of the crystal-rich magma, resulting in a macroscopic appearance similar to flow-layered silicic lava. Although it is a separate depositional unit, the Pagosa Peak Dacite is indistinguishable from the overlying Fish Canyon Tuff in bulk-rock chemistry, phenocryst compositions, and 40Ar/39Ar age. The unusual characteristics of this deposit are interpreted as consequences of eruption by low-column pyroclastic fountaining and lateral transport as dense, poorly inflated pyroclastic flows. The inferred eruptive style may be in part related to synchronous disruption of the southern margin of the Fish Canyon magma chamber by block faulting. The Pagosa Peak eruptive sources are apparently buried in the southern La Garita caldera, where northerly extensions of observed syneruptive faults served as fissure vents. Cumulative vent cross-sections were large, leading to relatively low emission velocities for a given discharge rate. Many successive pyroclastic flows accumulated sufficiently rapidly to weld densely as a cooling unit up to 1000 m thick and to retain heat adequately to permit rheomorphic flow. Explosive potential of the magma may have been reduced by degassing during ascent through fissure conduits, leading to fracture-dominated magma fragmentation at low vesicularity. Subsequent collapse of the 75 x 35 km2 La Garita caldera and eruption of the Fish Canyon Tuff were probably triggered by destabilization of the chamber roof as magma was withdrawn during the Pagosa Peak eruption. (C) 2000 Elsevier Science B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Volcanology and Geothermal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0377-0273(99)00185-7","issn":"03770273","usgsCitation":"Bachmann, O., Dungan, M., and Lipman, P.W., 2000, Voluminous lava-like precursor to a major ash-flow tuff: Low-column pyroclastic eruption of the Pagosa Peak Dacite, San Juan volcanic field, Colorado: Journal of Volcanology and Geothermal Research, v. 98, no. 1-4, p. 153-171, https://doi.org/10.1016/S0377-0273(99)00185-7.","startPage":"153","endPage":"171","numberOfPages":"19","costCenters":[],"links":[{"id":208112,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0377-0273(99)00185-7"},{"id":233564,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"98","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc36be4b08c986b32b180","contributors":{"authors":[{"text":"Bachmann, Olivier","contributorId":101030,"corporation":false,"usgs":true,"family":"Bachmann","given":"Olivier","affiliations":[],"preferred":false,"id":394572,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dungan, M.A.","contributorId":36304,"corporation":false,"usgs":true,"family":"Dungan","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":394570,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lipman, P. W.","contributorId":93470,"corporation":false,"usgs":true,"family":"Lipman","given":"P.","middleInitial":"W.","affiliations":[],"preferred":false,"id":394571,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70022665,"text":"70022665 - 2000 - Summary of the MAIA Working Conference","interactions":[],"lastModifiedDate":"2012-03-12T17:20:39","indexId":"70022665","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Summary of the MAIA Working Conference","docAbstract":"From November 30 to December 2, 1998, the Mid-Atlantic Integrated Assessment (MAIA) held a Working Conference in Baltimore, Maryland (USA). The Conference presented the results from several of its activities and programs to scientists, environmental managers, and the general public. The attendees provided feedback on the usefulness of the MAIA program's activities, and suggested additional needs and recommended changes for the future.","largerWorkTitle":"Environmental Monitoring and Assessment","conferenceTitle":"1st Symposium on the Mid-Atlantic Integrated Assessment Program (MAIA)","conferenceDate":"30 November 1998 through 2 December 1998","conferenceLocation":"Baltimore, MD, USA","language":"English","publisher":"Kluwer Academic Publishers","publisherLocation":"Dordrecht, Netherlands","doi":"10.1023/A:1006440930373","issn":"01676369","usgsCitation":"Bradley, M., Brown, B., Hale, S., Kutz, F., Landy, R., Shedlock, R., Mangold, R., Morris, A., Galloway, W., Rosen, J., Pepino, R., and Wiersma, B., 2000, Summary of the MAIA Working Conference, in Environmental Monitoring and Assessment, v. 63, no. 1, Baltimore, MD, USA, 30 November 1998 through 2 December 1998, p. 15-29, https://doi.org/10.1023/A:1006440930373.","startPage":"15","endPage":"29","numberOfPages":"15","costCenters":[],"links":[{"id":233632,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208144,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1023/A:1006440930373"}],"volume":"63","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9eeee4b08c986b31e21d","contributors":{"authors":[{"text":"Bradley, M.P.","contributorId":20122,"corporation":false,"usgs":true,"family":"Bradley","given":"M.P.","email":"","affiliations":[],"preferred":false,"id":394444,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brown, B.S.","contributorId":68613,"corporation":false,"usgs":true,"family":"Brown","given":"B.S.","email":"","affiliations":[],"preferred":false,"id":394450,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hale, S.S.","contributorId":64001,"corporation":false,"usgs":true,"family":"Hale","given":"S.S.","email":"","affiliations":[],"preferred":false,"id":394449,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kutz, F.W.","contributorId":107992,"corporation":false,"usgs":true,"family":"Kutz","given":"F.W.","email":"","affiliations":[],"preferred":false,"id":394455,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Landy, R.B.","contributorId":101360,"corporation":false,"usgs":true,"family":"Landy","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":394454,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Shedlock, R.","contributorId":95767,"corporation":false,"usgs":true,"family":"Shedlock","given":"R.","affiliations":[],"preferred":false,"id":394453,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Mangold, R.","contributorId":81376,"corporation":false,"usgs":true,"family":"Mangold","given":"R.","email":"","affiliations":[],"preferred":false,"id":394452,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Morris, A.","contributorId":30520,"corporation":false,"usgs":true,"family":"Morris","given":"A.","affiliations":[],"preferred":false,"id":394445,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Galloway, W.","contributorId":59699,"corporation":false,"usgs":true,"family":"Galloway","given":"W.","email":"","affiliations":[],"preferred":false,"id":394448,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Rosen, J.S.","contributorId":58159,"corporation":false,"usgs":true,"family":"Rosen","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":394447,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Pepino, R.","contributorId":48457,"corporation":false,"usgs":true,"family":"Pepino","given":"R.","email":"","affiliations":[],"preferred":false,"id":394446,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Wiersma, B.","contributorId":71071,"corporation":false,"usgs":true,"family":"Wiersma","given":"B.","email":"","affiliations":[],"preferred":false,"id":394451,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}} ,{"id":70022671,"text":"70022671 - 2000 - Factors associated with plant species richness in a coastal tall-grass prairie","interactions":[],"lastModifiedDate":"2018-01-13T15:05:22","indexId":"70022671","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2490,"text":"Journal of Vegetation Science","active":true,"publicationSubtype":{"id":10}},"title":"Factors associated with plant species richness in a coastal tall-grass prairie","docAbstract":"In this study we examine the factors associated with variations in species richness within a remnant tall-grass prairie in order to gain insight into the relative importance of controlling variables. The study area was a small, isolated prairie surrounded by wetlands and located within the coastal prairie region, which occurs along the northwestern Gulf of Mexico coastal plain. Samples were taken along three transects that spanned the prairie. Parameters measured included micro-elevation, soil characteristics, indications of recent disturbance, above-ground biomass (including litter), light penetration through the plant canopy, and species richness. Species richness was found to correlate with micro-elevation, certain soil parameters, and light penetration through the canopy, but not with above-ground biomass. Structural equation analysis was used to assess the direct and indirect effects of micro-elevation, soil properties, disturbance, and indicators of plant abundance on species richness. The results of this analysis showed that observed variations in species richness were primarily associated with variations in environmental effects (from soil and microtopography) and were largely unrelated to variations in measures of plant abundance (biomass and light penetration). These findings suggest that observed variations in species richness in this system primarily resulted from environmental effects on the species pool. These results fit with a growing body of information that suggests that environmental effects on species richness are of widespread importance.","language":"English","publisher":"Wiley","doi":"10.2307/3236637","usgsCitation":"Grace, J.B., Allain, L.K., and Allen, C., 2000, Factors associated with plant species richness in a coastal tall-grass prairie: Journal of Vegetation Science, v. 11, no. 3, p. 443-452, https://doi.org/10.2307/3236637.","productDescription":"10 p.","startPage":"443","endPage":"452","costCenters":[],"links":[{"id":233744,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"3","noUsgsAuthors":false,"publicationDate":"2000-02-24","publicationStatus":"PW","scienceBaseUri":"505a0eb3e4b0c8380cd5359d","contributors":{"authors":[{"text":"Grace, James B. 0000-0001-6374-4726 gracej@usgs.gov","orcid":"https://orcid.org/0000-0001-6374-4726","contributorId":884,"corporation":false,"usgs":true,"family":"Grace","given":"James","email":"gracej@usgs.gov","middleInitial":"B.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true},{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true},{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true}],"preferred":true,"id":394491,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Allain, Larry K. 0000-0002-7717-9761 allainl@usgs.gov","orcid":"https://orcid.org/0000-0002-7717-9761","contributorId":2414,"corporation":false,"usgs":true,"family":"Allain","given":"Larry","email":"allainl@usgs.gov","middleInitial":"K.","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true},{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true}],"preferred":true,"id":394492,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Allen, Charles","contributorId":119821,"corporation":false,"usgs":false,"family":"Allen","given":"Charles","email":"","affiliations":[],"preferred":false,"id":394490,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70022693,"text":"70022693 - 2000 - Formation of natural gas hydrates in marine sediments. Gas hydrate growth and stability conditioned by host sediment properties","interactions":[],"lastModifiedDate":"2017-08-31T10:44:28","indexId":"70022693","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Formation of natural gas hydrates in marine sediments. Gas hydrate growth and stability conditioned by host sediment properties","docAbstract":"The stability conditions of submarine gas hydrates (methane clathrates) are largely dictated by pressure, temperature, gas composition, and pore water salinity. However, the physical properties and surface chemistry of the host sediments also affect the thermodynamic state, growth kinetics, spatial distributions, and growth forms of clathrates. Our model presumes that gas hydrate behaves in a way analogous to ice in the pores of a freezing soil, where capillary forces influence the energy balance. Hydrate growth is inhibited within fine-grained sediments because of the excess internal phase pressure of small crystals with high surface curvature that coexist with liquid water in small pores. Therefore, the base of gas hydrate stability in a sequence of fine sediments is predicted by our model to occur at a lower temperature, and so nearer to the seabed than would be calculated from bulk thermodynamic equilibrium. The growth forms commonly observed in hydrate samples recovered from marine sediments (nodules, sheets, and lenses in muds; cements in sand and ash layers) can be explained by a requirement to minimize the excess of mechanical and surface energy in the system.","largerWorkTitle":"Annals of the New York Academy of Sciences","language":"English","issn":"00778923","usgsCitation":"Clennell, M.B., Henry, P., Hovland, M., Booth, J., Winters, W., and Thomas, M., 2000, Formation of natural gas hydrates in marine sediments. Gas hydrate growth and stability conditioned by host sediment properties, in Annals of the New York Academy of Sciences, v. 912, p. 887-896.","productDescription":"10 p.","startPage":"887","endPage":"896","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":233526,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"912","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1355e4b0c8380cd5460c","contributors":{"authors":[{"text":"Clennell, M. B.","contributorId":95221,"corporation":false,"usgs":true,"family":"Clennell","given":"M.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":394565,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Henry, P.","contributorId":91599,"corporation":false,"usgs":true,"family":"Henry","given":"P.","email":"","affiliations":[],"preferred":false,"id":394564,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hovland, M.","contributorId":51487,"corporation":false,"usgs":true,"family":"Hovland","given":"M.","email":"","affiliations":[],"preferred":false,"id":394562,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Booth, J.S.","contributorId":13619,"corporation":false,"usgs":true,"family":"Booth","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":394560,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Winters, W.J.","contributorId":49796,"corporation":false,"usgs":true,"family":"Winters","given":"W.J.","email":"","affiliations":[],"preferred":false,"id":394561,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Thomas, M.","contributorId":71343,"corporation":false,"usgs":true,"family":"Thomas","given":"M.","affiliations":[],"preferred":false,"id":394563,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70022672,"text":"70022672 - 2000 - Age-specific breeding in Emperor Geese","interactions":[],"lastModifiedDate":"2022-08-09T16:34:15.274333","indexId":"70022672","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3783,"text":"The Wilson Bulletin","printIssn":"0043-5643","active":true,"publicationSubtype":{"id":10}},"title":"Age-specific breeding in Emperor Geese","docAbstract":"I studied the frequency with which Emperor Geese (Chen canagica) of known age were observed breeding on the Yukon-Kuskokwim Delta, Alaska. No one- or two-year old geese were observed on nests. Three-year old geese bred at a lower rate than four-year old geese. These data suggest that patterns of age-specific breeding in Emperor Geese are similar to other sympatrically nesting, large bodied geese [Greater White-fronted Geese (Anser albifrons)] but delayed relative to smaller bodied geese [Cackling Canada Geese (Branta canadensis minima) and Pacific Black Brant (B. bernicla nigricans)].
","language":"English","publisher":"The Wilson Ornithological Society","doi":"10.1676/0043-5643(2000)112[0261:ASBIEG]2.0.CO;2","issn":"00435643","usgsCitation":"Schmutz, J.A., 2000, Age-specific breeding in Emperor Geese: The Wilson Bulletin, v. 112, no. 2, p. 261-263, https://doi.org/10.1676/0043-5643(2000)112[0261:ASBIEG]2.0.CO;2.","productDescription":"3 p.","startPage":"261","endPage":"263","costCenters":[{"id":106,"text":"Alaska Biological Science Center","active":false,"usgs":true}],"links":[{"id":489147,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1676/0043-5643(2000)112[0261:asbieg]2.0.co;2","text":"Publisher Index Page"},{"id":233745,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"112","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e8ffe4b0c8380cd4801d","contributors":{"authors":[{"text":"Schmutz, Joel A. 0000-0002-6516-0836 jschmutz@usgs.gov","orcid":"https://orcid.org/0000-0002-6516-0836","contributorId":1805,"corporation":false,"usgs":true,"family":"Schmutz","given":"Joel","email":"jschmutz@usgs.gov","middleInitial":"A.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":394493,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70022714,"text":"70022714 - 2000 - Colorado River sediment transport: 2. Systematic bed‐elevation and grain‐size effects of sand supply limitation","interactions":[],"lastModifiedDate":"2018-03-21T14:46:41","indexId":"70022714","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Colorado River sediment transport: 2. Systematic bed‐elevation and grain‐size effects of sand supply limitation","docAbstract":"The Colorado River in Marble and Grand Canyons displays evidence of annual supply limitation with respect to sand both prior to [Topping et al, this issue] and after the closure of Glen Canyon Dam in 1963. Systematic changes in bed elevation and systematic coupled changes in suspended‐sand concentration and grain size result from this supply limitation. During floods, sand supply limitation either causes or modifies a lag between the time of maximum discharge and the time of either maximum or minimum (depending on reach geometry) bed elevation. If, at a cross section where the bed aggrades with increasing flow, the maximum bed elevation is observed to lead the peak or the receding limb of a flood, then this observed response of the bed is due to sand supply limitation. Sand supply limitation also leads to the systematic evolution of sand grain size (both on the bed and in suspension) in the Colorado River. Sand input during a tributary flood travels down the Colorado River as an elongating sediment wave, with the finest sizes (because of their lower settling velocities) traveling the fastest. As the fine front of a sediment wave arrives at a given location, the bed fines and suspended‐sand concentrations increase in response to the enhanced upstream supply of finer sand. Then, as the front of the sediment wave passes that location, the bed is winnowed and suspended‐sand concentrations decrease in response to the depletion of the upstream supply of finer sand. The grain‐size effects of depletion of the upstream sand supply are most obvious during periods of higher dam releases (e.g., the 1996 flood experiment and the 1997 test flow). Because of substantial changes in the grain‐size distribution of the bed, stable relationships between the discharge of water and sand‐transport rates (i.e., stable sand rating curves) are precluded. Sand budgets in a supply‐limited river like the Colorado River can only be constructed through inclusion of the physical processes that couple changes in bed‐sediment grain size to changes in sand‐transport rates.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/1999WR900286","usgsCitation":"Topping, D.J., Rubin, D.M., Nelson, J.M., Kinzel, P.J., and Corson, I.C., 2000, Colorado River sediment transport: 2. Systematic bed‐elevation and grain‐size effects of sand supply limitation: Water Resources Research, v. 36, no. 2, p. 543-570, https://doi.org/10.1029/1999WR900286.","productDescription":"28 p.","startPage":"543","endPage":"570","costCenters":[],"links":[{"id":479221,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/1999wr900286","text":"Publisher Index Page"},{"id":233822,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Colorado River, Grand Canyon","volume":"36","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f7c1e4b0c8380cd4ccb9","contributors":{"authors":[{"text":"Topping, David J. 0000-0002-2104-4577 dtopping@usgs.gov","orcid":"https://orcid.org/0000-0002-2104-4577","contributorId":715,"corporation":false,"usgs":true,"family":"Topping","given":"David","email":"dtopping@usgs.gov","middleInitial":"J.","affiliations":[{"id":568,"text":"Southwest Biological Science Center","active":true,"usgs":true}],"preferred":false,"id":394636,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rubin, David M. 0000-0003-1169-1452 drubin@usgs.gov","orcid":"https://orcid.org/0000-0003-1169-1452","contributorId":3159,"corporation":false,"usgs":true,"family":"Rubin","given":"David","email":"drubin@usgs.gov","middleInitial":"M.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":394639,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nelson, Jonathan M. 0000-0002-7632-8526 jmn@usgs.gov","orcid":"https://orcid.org/0000-0002-7632-8526","contributorId":2812,"corporation":false,"usgs":true,"family":"Nelson","given":"Jonathan","email":"jmn@usgs.gov","middleInitial":"M.","affiliations":[{"id":37778,"text":"WMA - Integrated Modeling and Prediction Division","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":394637,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kinzel, Paul J. III 0000-0002-6076-9730","orcid":"https://orcid.org/0000-0002-6076-9730","contributorId":100586,"corporation":false,"usgs":true,"family":"Kinzel","given":"Paul","suffix":"III","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":394638,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Corson, Ingrid C.","contributorId":124571,"corporation":false,"usgs":false,"family":"Corson","given":"Ingrid","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":394635,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70022666,"text":"70022666 - 2000 - Quantifying precambrian crustal extraction: The root is the answer","interactions":[],"lastModifiedDate":"2020-05-04T19:37:21.477271","indexId":"70022666","displayToPublicDate":"2000-01-01T00:00:00","publicationYear":"2000","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3525,"text":"Tectonophysics","active":true,"publicationSubtype":{"id":10}},"title":"Quantifying precambrian crustal extraction: The root is the answer","docAbstract":"We use two different methods to estimate the total amount of continental crust that was extracted by the end of the Archean and the Proterozoic. The first method uses the sum of the seismic thickness of the crust, the eroded thickness of the crust, and the trapped melt within the lithospheric root to estimate the total crustal volume. This summation method yields an average equivalent thickness of Archean crust of 49±6 km and an average equivalent thickness of Proterozoic crust of 48± 9 km. Between 7 and 9% of this crust never reached the surface, but remained within the continental root as congealed, iron-rich komatiitic melt. The second method uses experimental models of melting, mantle xenolith compositions, and corrected lithospheric thickness to estimate the amount of crust extracted through time. This melt column method reveals that the average equivalent thickness of Archean crust was 65±6 km, and the average equivalent thickness of Early Proterozoic crust was 60±7 km. It is likely that some of this crust remained trapped within the lithospheric root. The discrepancy between the two estimates is attributed to uncertainties in estimates of the amount of trapped, congealed melt, overall crustal erosion, and crustal recycling. Overall, we find that between 29 and 45% of continental crust was extracted by the end of the Archean, most likely by 2.7 Ga. Between 51 and 79% of continental crust was extracted by the end of the Early Proterozoic, most likely by 1.8–2.0 Ga. Our results are most consistent with geochemical models that call upon moderate amounts of recycling of early extracted continental crust coupled with continuing crustal growth (e.g. McLennan, S.M., Taylor, S.R., 1982. Geochemical constraints on the growth of the continental crust. Journal of Geology, 90, 347–361; Veizer, J., Jansen, S.L., 1985. Basement and sedimentary recycling — 2: time dimension to global tectonics. Journal of Geology 93(6), 625–643). Trapped, congealed, iron-rich melt within the lithospheric root may represent some of the iron that is ‘missing’ from the lower crust. The lower crust within Archean cratons may also have an unexpectedly low iron content because it was extracted from more primitive, undepleted mantle.