Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Archiving, processing, and disseminating ASTER products at the USGS EROS Data Center Archiving, processing, and disseminating ASTER products at the USGS EROS Data Center
The U.S. Geological Survey EROS Data Center archives, processes, and disseminates Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data products. The ASTER instrument is one of five sensors onboard the Earth Observing System's Terra satellite launched December 18, 1999. ASTER collects broad spectral coverage with high spatial resolution at near infrared, shortwave...
Authors
Brenda Jones, Brian L. Tolk
Assessment of undiscovered petroleum resources in Central and South America Assessment of undiscovered petroleum resources in Central and South America
The USGS has assessed undiscovered conventional oil and gas resources in 128 selected petroleum provinces of the world. Of these 128 provinces, 23 are in South America, Central America, and the Caribbean area. In the USGS 2000 Assessment, the provinces resulted in mean totals for undiscovered resource of 105 billion bbl of oil and 487 tcf of gas. The potential for giant oil and gas...
Authors
Christopher J. Schenk
Basalt-flow imaging using a high-resolution directional borehole radar Basalt-flow imaging using a high-resolution directional borehole radar
A new high-resolution directional borehole radar-logging tool (DBOR tool) was used to log three wells at the Idaho National Engineering and Environmental Laboratory (INEEL). The radar system uses identical directional cavity-backed monopole transmitting and receiving antennas that can be mechanically rotated while the tool is stationary or moving slowly in a borehole. Faster...
Authors
C.W. Moulton, D.L. Wright, S.R. Hutton, D.V.G. Smith, J.D. Abraham
Biogeochemistry: Foreword Biogeochemistry: Foreword
[No abstract available]
Authors
L.G. Miller, K.D. Goodwin
Carbon isotope fractionation of methyl bromide during agricultural soil fumigations Carbon isotope fractionation of methyl bromide during agricultural soil fumigations
The isotopic composition of methyl bromide (CH3Br) has been suggested to be a potentially useful tracer for constraining the global CH3Br budget. In order to determine the carbon isotopic composition of CH3Br emitted from the most significant anthropogenic application (pre-plant fumigation) we directly measured the ??13C of CH3Br released during commercial fumigation. We also measured...
Authors
M. Bill, L.G. Miller, Allen H. Goldstein
Chemical and biological availability of hydrocarbons in urban harbor sediments Chemical and biological availability of hydrocarbons in urban harbor sediments
The degradation of saturated and aromatic hydrocarbons was studied in batch slurry experiments conducted with field-aged sediments, highly impacted by hydrocarbon pollution. Experiments focused on examining the effects of desorption limitations to hydrocarbon mineralization and degradation. Degradation of PAH (e.g., naphthalene, fluorene, acenaphthene) and saturated hydrocarbons was...
Authors
L.A. LeBlanc, Bruce J. Brownawell
Comparability and accuracy of fluvial-sediment data - A view from the U.S. Geological Survey Comparability and accuracy of fluvial-sediment data - A view from the U.S. Geological Survey
The quality of historical fluvial-sediment data cannot be taken for granted, based on a review of upper Colorado River basin suspended-sediment discharges, and on an evaluation of the reliability of Total Suspended Solids (TSS) data. Additionally, the quality of future fluvial-sediment data are not assured. Sediment-surrogate technologies, including those that operate on acoustic, laser...
Authors
J. R. Gray, G.D. Glysson, D. S. Mueller
Comparison of dialysis membrane diffusion samplers and two purging methods in bedrock wells Comparison of dialysis membrane diffusion samplers and two purging methods in bedrock wells
Collection of ground-water samples from bedrock wells using low-flow purging techniques is problematic because of the random spacing, variable hydraulic conductivity, and variable contamination of contributing fractures in each well's open interval. To test alternatives to this purging method, a field comparison of three ground-water-sampling techniques was conducted on wells in...
Authors
T.E. Imbrigiotta, T. A. Ehlke, P.J. Lacombe, J.M. Dale
Considerations for sampling inorganic constituents in ground water using diffusion samplers Considerations for sampling inorganic constituents in ground water using diffusion samplers
Data indicate that nylon-screen and dialysis diffusion samplers are capable of obtaining concentrations of inorganic solutes in ground water from wells that closely correspond to concentrations obtained by low-flow sampling. Conservative solutes, such as chloride, can be sampled by filling the diffusion samplers with oxygenated water. The samplers should be filled with anaerobic water...
Authors
D.A. Vroblesky, M.D. Petkewich, T.R. Campbell
Continuous monitoring of suspended sediment in rivers by use of optical backscatterance sensors Continuous monitoring of suspended sediment in rivers by use of optical backscatterance sensors
No abstract available.
Authors
D. H. Schoellhamer, S.A. Wright
Custom analysis; a winning proposition for customers and the National Laboratory Custom analysis; a winning proposition for customers and the National Laboratory
No abstract available.
Authors
Mark R. Burkhardt
Deep space 1 mission and observation of comet Borrellly Deep space 1 mission and observation of comet Borrellly
The NASA's new millennium program (NMP) focuses on testing high-risk, advanced technologies in space with low-cost flights. The objective of the NMP technology validation missions is to enable future science missions. The NMP missions are technology-driven, with the principal requirements coming from the needs of the advanced technologies that form the 'payload'.
Authors
M. Lee, R.J. Weidner, L.A. Soderblom