Conversations on the habitability of worlds: The importance of volatiles
J.-L. Bertaux, M. Carr, D.J. Des Marais, E. Gaidos
2007, Space Science Reviews (129) 123-165
Our scientific forefathers discuss the interrelationships between water, climate, the atmosphere, and life on Earth and other terrestrial planets at a workshop in Nichtcha??tel, Switzerland. ?? 2007 Springer Science+Business Media B.V....
Formation and disruption of aquifers in southwestern Chryse Planitia, Mars
J.A.P. Rodriguez, K. L. Tanaka, J.S. Kargel, J. M. Dohm, R. Kuzmin, A.G. Fairen, S. Sasaki, G. Komatsu, D. Schulze-Makuch, Y. Jianguo
2007, Icarus (191) 545-567
We present geologic evidence suggesting that after the development of Mars' cryolithosphere, the formation of aquifers in southwestern Chryse Planitia and their subsequent disruption led to extensive regional resurfacing during the Late Hesperian, and perhaps even during the Amazonian. In our model, these aquifers formed preferentially along thrust faults associated...
Sinter-vein correlations at Buckskin Mountain, National district, Humboldt County, Nevada
P.G. Vikre
2007, Economic Geology (102) 193-224
At Buckskin Mountain (elev 2,650 m, 8,743 ft), Humboldt County, Nevada, a hydrothermal system, imposed on a middle Miocene volcanic sequence with contrasting permeabilities and tensile strengths, produced alteration assemblages controlled by elevation, from Hg-mineralized sinter to subjacent precious metal veins over a vertical distance exceeding 790 m. Sinter and...
Comprehensive characterization of atmospheric organic matter in Fresno, California fog water
P. Herckes, J.A. Leenheer, J.L. Collett Jr.
2007, Environmental Science & Technology (41) 393-399
Fogwater collected during winter in Fresno (CA) was characterized by isolating several distinct fractions and characterizing them by infrared and nuclear magnetic resonance (NMR) spectroscopy. More than 80% of the organic matter in the fogwater was recovered and characterized. The most abundant isolated fractions were those comprised of volatile acids...
Factors associated with sources, transport, and fate of volatile organic compounds and their mixtures in aquifers of the United States
P. J. Squillace, M.J. Moran
2007, Environmental Science & Technology (41) 2123-2130
Factors associated with sources, transport, and fate of volatile organic compounds (VOCs) in groundwater from aquifers throughout the United States were evaluated using statistical methods. Samples were collected from 1631 wells throughout the conterminous United States between 1996 and 2002 as part of the National Water-Quality Assessment (NAWQA) Program of...
Input, flux, and persistence of six select pesticides in San Francisco Bay
Kathryn Kuivila, B.E. Jennings
2007, International Journal of Environmental Analytical Chemistry (87) 897-911
Temporal patterns of pesticide inputs to San Francisco Bay were identified and correlated with timing of application and transport mechanism. Fluxes were calculated from measured concentrations and estimated flow. Persistence of the pesticides under typical riverine or estuarine conditions were estimated from laboratory experiments. Simazine was detected most frequently and...
Evasion of added isotopic mercury from a northern temperate lake
G. Southworth, S. Lindberg, H. Hintelmann, M. Amyot, A. Poulain, M. Bogle, M. Peterson, J. Rudd, R. Harris, K. Sandilands, David P. Krabbenhoft, Mark L. Olsen
2007, Environmental Toxicology and Chemistry (26) 53-60
Isotopically enriched Hg (90% 202Hg) was added to a small lake in Ontario, Canada, at a rate equivalent to approximately threefold the annual direct atmospheric deposition rate that is typical of the northeastern United States. The Hg spike was thoroughly mixed into the epilimnion in nine separate events at two-week...
Possible ancient giant basin and related water enrichment in the Arabia Terra province, Mars
J. M. Dohm, N.G. Barlow, R. C. Anderson, J.-P. Williams, H. Miyamoto, J.C. Ferris, R.G. Strom, G.J. Taylor, A.G. Fairen, V.R. Baker, W. V. Boynton, J.M. Keller, K. Kerry, D. Janes, J.A.P. Rodriguez, T.M. Hare
2007, Icarus (190) 74-92
A circular albedo feature in the Arabia Terra province was first hypothesized as an ancient impact basin using Viking-era information. To test this unpublished hypothesis, we have analyzed the Viking era-information together with layers of new data derived from the Mars Global Surveyor (MGS) and Mars Odyssey (MO) missions. Our...
Influence of dissolved oxygen convection on well sampling
D.A. Vroblesky, C.C. Casey, M.A. Lowery
2007, Ground Water Monitoring and Remediation (27) 49-58
Convective transport of dissolved oxygen (D.O.) from shallow to deeper parts of wells was observed as the shallow water in wells in South Carolina became cooler than the deeper water in the wells due to seasonal changes. Wells having a relatively small depth to water were more susceptible to thermally...
Chemistry of thermally altered high volatile bituminous coals from southern Indiana
R. Walker, Maria Mastalerz, S. Brassell, E. Elswick, J.C. Hower, A. Schimmelmann
2007, International Journal of Coal Geology (71) 2-14
The optical properties and chemical characteristics of two thermally altered Pennsylvanian high volatile bituminous coals, the non-coking Danville Coal Member (Ro = 0.55%) and the coking Lower Block Coal Member (Ro = 0.56%) were investigated with the purpose of understanding differences in their coking behavior. Samples of the coals were...
Mass balances of mercury and nitrogen in burned and unburned forested watersheds at Acadia National Park, Maine, USA
S.J. Nelson, K.B. Johnson, J. S. Kahl, T.A. Haines, I.J. Fernandez
2007, Environmental Monitoring and Assessment (126) 69-80
Precipitation and streamwater samples were collected from 16 November 1999 to 17 November 2000 in two watersheds at Acadia National Park, Maine, and analyzed for mercury (Hg) and dissolved inorganic nitrogen (DIN, nitrate plus ammonium). Cadillac Brook watershed burned in a 1947 fire that destroyed vegetation and soil organic matter....
Effects of acid-volatile sulfide on metal bioavailability and toxicity to midge (Chironomus tentans) larvae in black shale sediments
G.M. Ogendi, W. G. Brumbaugh, R.E. Hannigan, J.L. Farris
2007, Environmental Toxicology and Chemistry (26) 325-334
Metal bioavailability and toxicity to aquatic organisms are greatly affected by variables such as pH, hardness, organic matter, and sediment acid-volatile sulfide (AVS). Sediment AVS, which reduces metal bioavailability and toxicity by binding and immobilizing metals as insoluble sulfides, has been studied intensely in recent years. Few studies, however, have...
Geochemical data for mercury, methylmercury, and other constituents in sediments from Englebright Lake, California, 2002
Charles N. Alpers, Michael P. Hunerlach, Mark C. Marvin-DePasquale, Ronald C. Antweiler, Brenda K. Lasorsa, John F. De Wild, Noah P. Snyder
2006, Data Series 151
This report presents geochemical data from two 2002 sampling campaigns conducted in Englebright Lake on the Yuba River in northern California. A deep coring campaign was done in May-June 2002 and a shallow sampling campaign was completed in October 2002. This work assessed the chemical composition of material deposited in...
Organic Compounds and Trace Elements in Fish Tissue and Bed Sediment in the Delaware River Basin, New Jersey, Pennsylvania, New York, and Delaware, 1998-2000
Kristin M. Romanok, Jeffrey M. Fischer, Karen Riva-Murray, Robin Brightbill, Michael Bilger
2006, Scientific Investigations Report 2006-5150
As part of the National Water-Quality Assessment (NAWQA) program activities in the Delaware River Basin (DELR), samples of fish tissue from 21 sites and samples of bed sediment from 35 sites were analyzed for a suite of organic compounds and trace elements. The sampling sites, within subbasins ranging in size...
Recent (2003-05) water quality of Barton Springs, Austin, Texas, with emphasis on factors affecting variability
Barbara Mahler, Bradley D. Garner, MaryLynn Musgrove, Amber L. Guilfoyle, Mohan V. Rao
2006, Scientific Investigations Report 2006-5299
From 2003 to 2005, the U.S. Geological Survey, in cooperation with the Texas Commission on Environmental Quality, collected and analyzed water samples from the four springs (orifices) of Barton Springs in Austin, Texas (Upper, Main, Eliza, and Old Mill Springs), with the objective of characterizing water quality. Barton Springs is...
Geologic Map of the MTM-20272 and-25272 Quadrangles, Tyrrhena Terra Region of Mars
Scott C. Mest, David A. Crown
2006, Scientific Investigations Map 2934
Introduction Mars Transverse Mercator (MTM) -20272 and -25272 quadrangles (lat 17.5?-27.5? S., long 270?-275? W.) cover part of the highlands of Tyrrhena Terra north of Hellas Planitia. The surface of the Tyrrhena Terra region records a complex history of impact cratering and modification by fluvial and eolian activity. The map area...
Volatile organic compounds in samples from domestic and public wells, 1985-2002
Barbara L. Rowe, John S. Zogorski, Joshua F. Valder
2006, Scientific Investigations Map 2938
The U.S. Geological Survey's (USGS) National Water-Quality Assessment (NAWQA) Program recently completed a national study of volatile organic compounds (VOCs) in the Nation's ground water (Zogorski and others, 2006). Part of this assessment emphasizes the occurrence of 55 VOCs in samples from 2,401 domestic wells and 1,096 public wells during...
The occurrence of volatile organic compounds in aquifers of the United States
Wayne W. Lapham, Janet M. Carter, John S. Zogorski, Joshua F. Valder
2006, Scientific Investigations Map 2931
The U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program recently completed a national assessment of volatile organic compounds (VOCs) in ground water (Zogorski and others, 2006). As part of this assessment, samples of ambient ground water collected from 3,498 wells during 1985-2002 were selected for characterizing the occurrence of 55...
Occurrence of volatile organic compounds in selected urban streams in the United States, 1995-2003
David A. Bender, Curtis V. Price, Joshua F. Valder
2006, Scientific Investigations Map 2937
The U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program sampled 37 urban streams throughout the United States for volatile organic compounds (VOCs) from 1995 to 2003. These urban streams were selected to (1) characterize stream water quality from areas draining predominantly residential and commercial land uses and (2) determine which...
Occurrence of anthropogenic organic compounds in ground water and finished water of community water systems in Eagle and Spanish Springs Valleys, Nevada, 2002-2004
Michael R. Rosen, Donald H. Shaefer, Patricia A. Toccalino, Gregory C. Delzer
2006, Scientific Investigations Report 2006-5210
As a part of the U.S. Geological Survey's National Water-Quality Assessment Program, an effort to characterize the quality of major rivers and aquifers used as a source of supply to some of the largest community water systems (CWSs) in the United States has been initiated. These studies, termed Source Water-Quality...
Selected Natural Attenuation Monitoring Data, Operable Unit 1, Naval Undersea Warfare Center, Division Keyport, Washington, June 2005
Richard S. Dinicola, R.L. Huffman
2006, Open-File Report 2006-1374
Previous investigations have shown that natural attenuation and biodegradation of chlorinated volatile organic compounds (VOCs) are substantial in shallow ground water beneath the 9-acre former landfill at Operable Unit 1 (OU-1), Naval Undersea Warfare Center, Division Keyport, Washington. The U.S. Geological Survey (USGS) has continued to monitor ground-water geochemistry to...
Influence of In-Well Convection on Well Sampling
Don A. Vroblesky, Clifton C. Casey, Mark A. Lowery
2006, Scientific Investigations Report 2006-5247
Convective transport of dissolved oxygen (DO) from shallow to deeper parts of wells was observed as the shallow water in wells in South Carolina became cooler than the deeper water in the wells due to seasonal changes. Wells having a relatively small depth to water were more susceptible to thermally...
Description, Properties, and Degradation of Selected Volatile Organic Compounds Detected in Ground Water--A Review of Selected Literature
Stephen J. Lawrence
2006, Open-File Report 2006-1338
This report provides abridged information describing the most salient properties and biodegradation of 27 chlorinated volatile organic compounds detected during ground-water studies in the United States. This information is condensed from an extensive list of reports, papers, and literature published by the U.S. Government, various State governments, and peer-reviewed journals....
Reconciling carbon-cycle concepts, terminology, and methods
F. S. Chapin III, G. M. Woodwell, J. T. Randerson, E. B. Rastetter, G. Lovett, D. D. Baldocchi, D. A. Clark, M. E. Harmon, D. S. Schimel, R. Valentini, C. Wirth, J. D. Aber, J. J. Cole, M. L. Goulden, Jennifer W. Harden, M. Heimann, R. W. Howarth, P. A. Matson, A. D. McGuire, J. M. Melillo, H. A. Mooney, J. C. Neff, R. A. Houghton, M. L. Pace, M. G. Ryan, S. W. Running, O. E. Sala, W. H. Schlesinger, E. #NAME? Schulze
2006, Ecosystems (9) 1041-1050
Recent projections of climatic change have focused a great deal of scientific and public attention on patterns of carbon (C) cycling as well as its controls, particularly the factors that determine whether an ecosystem is a net source or sink of atmospheric carbon dioxide (CO2). Net ecosystem production (NEP), a...
California GAMA program: Ground-water quality data in the northern San Joaquin Basin Study Unit, 2005
George L. V Bennett V, Kenneth Belitz, Barbara J. Milby Dawson
2006, Data Series 196
Growing concern over the closure of public-supply wells because of ground-water contamination has led the State Water Board to establish the Ground-Water Ambient Monitoring and Assessment (GAMA) Program. With the aid of the U.S. Geological Survey (USGS) and Lawrence Livermore National Laboratory, the program goals are to enhance understanding and...
