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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Pesticide degradates: Monitoring and occurrence
No abstract available.
Authors
D.W. Kolpin, W.A. Battaglin, M. T. Meyer, D.J. Schnoebelen, S. J. Kalkhoff
Topographic mapping of Mars: From hectometer to micrometer scales
We describe USGS topomapping of Mars at resolutions from 100 m to 30 µm with data from the latest spacecraft missions. Analysis of NASA 2001 Mars Odyssey Thermal Emission Imaging System (THEMIS) data combining daytime visible reflected, daytime IR emitted, and nighttime IR emitted images allows us to isolate the physical effects of topography, albedo, and thermal inertia. To a good approximation t
Authors
Randolph L. Kirk, Steven W. Squyres, Gerhard Neukum
A new Mars Digital Image Model (MDIM 2.1) control network
The U.S. Geological Survey has recently completed a final revised version of its 231 m/pixel global Viking image mosaic of Mars that has substantially improved geodetic accuracy compared to versions released in 1991 and 2001. This mosaic, known as MDIM 2.1, is currently available in the USGS ISIS file format (see http://astrogeology.usgs.gov/Projects/MDIM21/) and will be formatted and submitted to
Authors
Brent A. Archinal, Ella M. Lee, Randolph L. Kirk, T. C. Duxbury, Robert M. Sucharski, Debbie Cook, Janet M. Barrett
A new Mars Digital Image Model (MDIM 2.1) control network
The U.S. Geological Survey has recently completed a final revised version of its 231 m/pixel global Viking image mosaic of Mars that has substantially improved geodetic accuracy compared to versions released in 1991 and 2001. This mosaic, known as MDIM 2.1, is currently available in the USGS ISIS file format and will be formatted and submitted to the NASA Planetary Data System (PDS) in the near fu
Authors
Brent A. Archinal, Ella M. Lee, Randolph L. Kirk, T. C. Duxbury, Robert M. Sucharski, Debbie Cook, Janet M. Barrett
Responses of male fathead minnows to wastewater effluent--Indications of causative factors
No abstract available.
Authors
K. E. Lee, L. B. Barber, H.L. Schoenfuss
Ground-water evapotranspiration estimates near wet meadows using well hydrographs
No abstract available.
Authors
T.K. Cowdery
Unsaturated zone tracer test at a crude oil spill site
No abstract available.
Authors
G. N. Delin, W.N. Herkelrath
A national fish-tissue mercury model--Implications for monitoring program design
No abstract available.
Authors
Stephen P. Wente
Core-scale permeability of an actively venting, felsic-hosted hydrothermal system: The PACMANUS Hydrothermal Field
Permeability of the ocean crust is one of the most crucial parameters for constraining submarine fluid flow systems. Active hydrothermal fields are dynamic areas where fluid flow strongly affects the geochemistry and biology of the surrounding environment. There have been few permeability measurements in these regions, especially in felsic-hosted hydrothermal systems. We present a data set of 38 p
Authors
L.B. Christiansen, G.J. Iturrino
Transferability of tubifex limiting factor models
Dense populations of T. tubifex are generally associated with habitats dominated by fine sediments and enriched organic material (e.g. Krueger, 2002). Management of whirling disease positive systems is entering a new phase where channel modifications are being implemented to reduce or isolate this type of habitat. These management actions have the potential to cause new areas of sediment deposit
Authors
James W. Terrell, Robert T. Milhous
Preparing for THEMIS controlled global Mars mosaics
We have begun work to prepare for producing controlled 2001 Mars Odyssey THEMIS infrared (IR) and visible (VIS) global mosaics of Mars. This effort is being coordinated with colleagues from Arizona State University and on the THEMIS team who plan to address radiometric issues in making such mosaics. We are concentrating on geometric issues. Several areas of investigation are now in progress, inclu
Authors
Brent A. Archinal, Lynn A. Weller, Stuart C. Sides, Glen E. Cushing, Randolph L. Kirk, Laurence A. Soderblom, T. C. Duxbury
A Floristic Quality Assessment system for the coastal prairie of Louisiana
Evaluation systems to assess the biotic integrity of plant communities exist for some ecosystems, but not the increasingly rare coastal prairies of Louisiana. A list of plant species occurring in Louisiana's coastal prairie was created and coefficients of conservatism (C) were assigned for each species. A Floristic Quality Index (FQI), which is calculated using the C values provided by a panel of
Authors
Larry K. Allain, Latimore Smith, Charles Allen, Malcolm Vidrine, James B. Grace