Conference Papers
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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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The role of climate and vegetation change in shaping past and future fire regimes in the northwestern US and the implications for ecosystem management The role of climate and vegetation change in shaping past and future fire regimes in the northwestern US and the implications for ecosystem management
Fire is an important part of the disturbance regimes of northwestern US forests and its role in maintaining and altering forest vegetation is evident in the paleoecological record of the region. Long-term reconstructions of Holocene fire regimes, provided by the analysis of charcoal, pollen, and other fire proxies in a network of lake records, indicate that the Pacific Northwest and...
Authors
C. Whitlock, S.L. Shafer, J. Marlon
The role of multiple stressor causes in declining amphibian populations: A wingspread workshop summary The role of multiple stressor causes in declining amphibian populations: A wingspread workshop summary
Numerous studies have documented the decline of amphibian populations over the past decade and no single factor has been the linked to these widespread declines. Determining the causes of declining amphibian populations worldwide has proven difficult because of the variety of anthropogenic and natural suspect agents. A Wingspread workshop, convened by The Society of Environmental...
Authors
S.K. Krest, G. Linder, D. W. Sparling
The Sohagpur Coalfield Project - A collaborative study of potential coking coal resources by the Geological Survey of India and the U.S. Geological Survey The Sohagpur Coalfield Project - A collaborative study of potential coking coal resources by the Geological Survey of India and the U.S. Geological Survey
The Geological Survey of India (GSI), Coal Wing, and the U.S. Geological Survey (USGS), Energy Resources Team, conducted a collaborative study of the potential for coking coal resources within the Sohagpur coalfield, Madhya Pradesh, India from 1995 to 2001. The coalfield is located within an extensional basin that contains Permian- and Triassic-age strata of the Gondwana Supergroup (Figs...
Authors
Robert C. Milici, Abhijit Mukhopadhyay, Peter D. Warwick, S. Adhikari, Edwin R. Landis, S.K. Mukhopadhyay
The United Nations Framework Classification for World Petroleum Resources The United Nations Framework Classification for World Petroleum Resources
The United Nations has developed an international framework classification for solid fuels and minerals (UNFC). This is now being extended to petroleum by building on the joint classification of the Society of Petroleum Engineers (SPE), the World Petroleum Congresses (WPC) and the American Association of Petroleum Geologists (AAPG). The UNFC is a 3-dimansional classification. This: Is...
Authors
Thomas S. Ahlbrandt, P. Blystad, E.D. Young, S. Slavov, S. Heiberg
The use of sea ice habitat by female polar bears in the Beaufort Sea The use of sea ice habitat by female polar bears in the Beaufort Sea
Polar bears (Ursus maritimus) depend on ice-covered seas to satisfy life history requirements. Modern threats to polar bears include oil spills in the marine environment and changes in ice composition resulting from climate change. Managers need practical models that explain the distribution of bears in order to assess the impacts of these threats. We used stepwise procedures to create...
Authors
George M. Durner, Steven C. Amstrup, Ryan M. Nielson, Trent McDonald
Tidal and vertical variability of floc characteristics Tidal and vertical variability of floc characteristics
No abstract available.
Authors
Neil K. Ganju, David H. Schoellhamer
Total suspends data - a critical evaluation Total suspends data - a critical evaluation
No abstract available.
Authors
G. Douglas Glysson, John R. Gray
Trends in the sediment yield of the Sacramento River, 1957-2001 Trends in the sediment yield of the Sacramento River, 1957-2001
No abstract available.
Authors
S.A. Wright, D. H. Schoellhamer
Two-dimensional inverse and three-dimensional forward modeling of MT (magnetotelluric) data to evaluate the mineral potential of the Amphitheater Mountains, Alaska, USA Two-dimensional inverse and three-dimensional forward modeling of MT (magnetotelluric) data to evaluate the mineral potential of the Amphitheater Mountains, Alaska, USA
As part of an integrated geological and geophysical study to assess the mineral potential in the Amphitheater Mountains of south-central Alaska, USA, two magnetotelluric (MT) profiles were acquired during the summer of 2002. The two parallel MT lines, along with helicopter electromagnetic (HEM) and magnetic data acquired by the State of Alaska Division of Geological and Geophysical...
Authors
Louise Pellerin, Jeanine M. Schmidt, G. Michael Hoversten
Type a influenza virus surveillance in free-flying, nonmigratory ducks residing on the eastern shore of Maryland Type a influenza virus surveillance in free-flying, nonmigratory ducks residing on the eastern shore of Maryland
Virus surveillance in free-flying, nonmigratory ducks living on the eastern shore of Maryland indicated that influenza A viruses were introduced into the area or that the prevalence of endemic infections increased between July 15 and August 27, 1998. Cloacal swabs collected between May 28 and July 15, 1998, were negative for influenza A virus recovery (0/233), whereas 13.9% (29/209) of...
Authors
R.D. Slemons, W. R. Hansen, K. A. Converse, D.A. Senne
U.S. Geological Survey on-line fluvial sediment data U.S. Geological Survey on-line fluvial sediment data
No abstract available.
Authors
John R. Gray, Lisa M. Turcios
U.S. Geological Survey research on surrogate measurements for suspended sediment U.S. Geological Survey research on surrogate measurements for suspended sediment
The U.S. Geological Survey is evaluating potentially useful surrogate instruments and methods for inferring the physical characteristics of suspended sediments. Instruments operating on bulk acoustic, bulk and digital optic, laser, and pressure-differential technologies are being tested in riverine and laboratory settings for their usefulness to Federal agencies toward providing...
Authors
John R. Gray, Theodore S. Melis, Eduardo Patiño, Matthew C. Larsen, David J. Topping, Patrick P. Rasmussen, Carlos Figueroa-Alamo