Magmatic gas efflux at the Ukinrek Maars, Alaska
Deborah Bergfeld, W. C. Evans, A.G. Hunt, R. G. McGimsey
T.D. Bullen, Y. Wang, editor(s)
2007, Conference Paper, Water-rock interaction: proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12, Kunming, China, 31 July-5 August 2007
No abstract available....
Glacier-volcano interactions in the north crater of Mt. Wrangell, Alaska
Carl Abston, Roman J. Motyka, Stephen McNutt, Martin Luthi, Martin Truffer
2007, Annals of Glaciology (45) 48-57
Glaciological and related observations from 1961 to 2005 at the summit of Mt Wrangell (62.008 N, 144.028W; 4317 m a.s.l.), a massive glacier-covered shield volcano in south-central Alaska, show marked changes that appear to have been initiated by the Great Alaska Earthquake (MW = 9.2) of 27 March 1964. The...
Adapting to the reality of climate change at Glacier National Park, Montana, USA
Daniel B. Fagre
2007, Conference Paper, Proceedings of the first international conference on the impact of climate change: On high-mountain systems
The glaciers of Glacier National Park (GNP) are disappearing rapidly and likely will be gone by 2030. These alpine glaciers have been continuously present for approximately 7,000 years so their loss from GNP in another 25 years underscores the significance of current climate change. There are presently only 27 glaciers...
Sustaining Rocky Mountain landscapes: Science, policy and management for the Crown of the Continent ecosystem
Tony Prato, Daniel B. Fagre, editor(s)
2007, Book
Prato and Fagre offer the first systematic, multi-disciplinary assessment of the challenges involved in managing the Crown of the Continent Ecosystem ( CCE), an area of the Rocky Mountains that includes northwestern Montana, southwestern Alberta, and southeastern British Columbia. The spectacular landscapes, extensive recreational options, and broad employment opportunities of...
Modeling the biophysical impacts of global change in mountain biosphere reserves
H.K.M. Bugmann, F. Ewert Bjornsen, W. Haeberli, Antoine Guisan, Daniel B. Fagre, A. Kaab
2007, Mountain Research and Development (27) 66-77
Mountains and mountain societies provide a wide range of goods and services to humanity, but they are particularly sensitive to the effects of global environmental change. Thus, the definition of appropriate management regimes that maintain the multiple functions of mountain regions in a time of greatly changing climatic, economic, and...
Translocation and disease monitoring of wild laysan ducks
Michelle H. Reynolds, Thierry M. Work
2007, Endangered Species Bulletin (XXXII) 52-54
The Laysan duck (Anas laysanensis), also known as the Laysan teal because of its small size, is a critically endangered waterfowl species that once occurred widely across the Hawaiian Archipelago. For the past 150 years, however, it was restricted to a single population on Laysan, a 4-square-kilometer (1.5-square-mile) island with...
Distribution and grain-size partitioning of metals in bovfom sediments of an experimentally acidified Wisconsin lake
John F. Elder
2007, Water Resources Bulletin (30)
A study of concentrations and distribution of major and trace elements in surficial bottom sediments of Little Rock Lake in northern Wisconsin included examination of spatial variation and grain-size effects. No significant differences with respect to metal distribution in sediments were observed between the two basins of the lake, despite...
Volcanic fire and glacial ice: Mount Rogers National Recreation Area
Water Resources Division, U.S. Geological Survey, U.S. Forest Service
2007, Report
In addition to containing the highest point in Virginia (Mount Rogers, elevation 5,729 feet), the Mount Rogers National Recreation Area (NRA) of the Jefferson National Forest is a window on the history of ancient volcanic eruptions and glacial movement....
Frequency-duration analysis of dissolved-oxygen concentrations in two southwestern Wisconsin streams
Steven R. Greb, David J. Graczyk
2007, Water Resources Bulletin (31) 431-438
Historically, dissolved-oxygen (DO) data have been collected in the same manner as other water-quality constituents, typically at infrequent intervals as a grab sample or an instantaneous meter reading. Recent years have seen an increase in continuous water-quality monitoring with electronic dataloggers. This new technique requires new approaches in the statistical...
Effective groundwater model calibration: With analysis of data, sensitivities, predictions, and uncertainty
Mary C. Hill, Claire R. Tiedeman
2007, Book
Methods and guidelines for developing and using mathematical modelsTurn to Effective Groundwater Model Calibration for a set of methods and guidelines that can help produce more accurate and transparent mathematical models. The models can represent groundwater flow and transport and other natural and engineered systems. Use this book and its...
Suspended-sediment transport measurement
John R. Gray
2007, Book chapter, Encyclopedia of Water Science
Of the two operationally defined phases of fluvial-sediment transport – suspended load and bedload – collection of suspended-load data is the more common. This is a reflection of a number of factors including the general predominance of suspended load over bedload in mass transport and the greater difficulty and costs...
Vision for a worldwide fluvial-sediment information network
J. R. Gray, W. R. Osterkamp
2007, Conference Paper, Proceedings of the Tenth International Symposium on River Sedimentation, August 1-4, 2007, Moscow, Russia
The nations of the world suffer both from the deleterious effects of some natural and human-altered fluxes of fluvial sediment and a lack of consistent and reliable information on the temporal and spatial occurrence of fluvial sediments. Decades ago, this difficulty was unavoidable due to a lack of understanding of...
Magnesium compounds
D.A. Kramer
2007, Mining Engineering (59) 43-44
Seawater and natural brines accounted for about 52 percent of U.S. magnesium compounds production in 2006. Dead-burned magnesia was produced by Martin Marietta Magnesia Specialties from well brines in Michigan. Caustic-calcined magnesia was recovered from sea-water by Premier Chemicals in Florida; from well brines in Michigan by Martin Marietta and...
EAARL Topography-Sagamore Hill National Historic Site
John Brock, C. Wayne Wright, Amar Nayegandhi, Matt Patterson, Laurinda J. Travers
2007, Open-File Report 2007-1394
This Web site contains lidar-derived bare earth (BE) and first return (FR) topography maps and GIS files for the Sagamore Hill National Historic Site. These lidar-derived topography maps were produced as a collaborative effort between the U.S. Geological Survey (USGS) Coastal and Marine Geology Program, FISC St. Petersburg, Florida, the National...
EAARL Topography-Padre Island National Seashore
John Brock, C. Wayne Wright, Amar Nayegandhi, Matt Patterson, Iris Wilson, Laurinda J. Travers
2007, Open-File Report 2007-1431
This Web site contains 116 Lidar-derived bare earth topography maps and GIS files for Padre Island National Seashore-Texas. These Lidar-derived topography maps were produced as a collaborative effort between the U.S. Geological Survey (USGS) Florida Integrated Science Center (FISC) St. Petersburg, Florida, the National Park Service (NPS) Gulf Coast Network, Inventory...
EAARL Submarine Topography - Northern Florida Keys Reef Tract
John Brock, C. Wayne Wright, Amar Nayegandhi, Matt Patterson, Laurinda J. Travers, Iris Wilson
2007, Open-File Report 2007-1432
This Web site contains 32 Lidar-derived bare earth topography maps and GIS files for the Northern Florida Keys Reef Tract. These lidar-derived submarine topographic maps were produced as a collaborative effort between the U.S. Geological Survey (USGS) Coastal and Marine Geology Program, FISC St. Petersburg, Florida, the National Park Service (NPS)...
Report of the First National Lidar Initiative Meeting, February 14-16, Reston, Va.
Jason M. Stoker, Jay Parrish, David Gisclair, David Harding, Ralph Haugerud, Martin Flood, Hans-Erik Andersen, Karen Schuckman, David Maune, Paul Rooney, Kirk Waters, Ayman Habib, Eddie Wiggins, Bryon Ellingson, Benjamin M. Jones, Steve Nechero, Amar Nayegandhi, Tim Saultz, George Lee
2007, Open-File Report 2007-1189
The first National Lidar Initiative meeting was held on February 14-16, 2007 at the USGS National Center in Reston, Virginia. This meeting was a successor to a meeting held September 12, 2006 of several agencies, including the National Aeronautics and Space Administration (NASA), the Association of American State Geologists (AASG),...
U.S. Geological Survey assessment concepts for conventional petroleum accumulations: Chapter 24 in Petroleum systems and geologic assessment of oil and gas in the San Joaquin Basin Province, California
James W. Schmoker, T. R. Klett
2007, Professional Paper 1713-24
Conventional petroleum accumulations are discrete fields or pools localized in structural or stratigraphic traps by the buoyancy of oil or gas in water; they float, bubble-like, in water. This report describes the fundamental concepts supporting the U.S. Geological Survey “Seventh Approximation” model for resource assessments of conventional accumulations. The Seventh...
U.S. Geological Survey input-data form and operational procedure for the assessment of conventional petroleum accumulations: Chapter 25 in Petroleum systems and geologic assessment of oil and gas in the San Joaquin Basin Province, California
T. R. Klett, James W. Schmoker, Ronald R. Charpentier
2007, Professional Paper 1713-25
The U.S. Geological Survey model for undiscovered conventional accumulations is designed to aid in the assessment of crude oil, natural gas, and natural gas liquids (collectively called petroleum) resources. Conventional accumulations may be described in terms of discrete fields or pools localized in structural and stratigraphic traps by the buoyancy...
Landscape scale controls on the vascular plant component of dissolved organic carbon across a freshwater delta
Robert S. Eckard, Peter J. Hernes, Brian A. Bergamaschi, Ramunas Stepanauskas, Carol Kendall
2007, Geochimica et Cosmochimica Acta (71) 5968-5984
Lignin phenol concentrations and compositions were determined on dissolved organic carbon (DOC) extracts (XAD resins) within the Sacramento-San Joaquin River Delta (the Delta), the tidal freshwater portion of the San Francisco Bay Estuary, located in central California, USA. Fourteen stations were sampled, including the following habitats and land-use types: wetland,...
Occurrence and potential human-health relevance of volatile organic compounds in drinking water from domestic wells in the United States
Barbara L. Rowe, Patricia Toccalino, Michael J. Moran, John S. Zogorski, Curtis V. Price
2007, Environmental Health Perspectives (115) 1539-1546
BackgroundAs the population and demand for safe drinking water from domestic wells increase, it is important to examine water quality and contaminant occurrence. A national assessment in 2006 by the U.S. Geological Survey reported findings for 55 volatile organic compounds (VOCs) based on 2,401 domestic wells sampled...
Release of elements to natural water from sediments of Lake Roosevelt, Washington, USA
Anthony J. Paulson, Stephen E. Cox
2007, Environmental Toxicology and Chemistry (26) 2550-2559
Reservoir sediments from Lake Roosevelt (WA, USA) that were contaminated with smelter waste discharged into the Columbia River (BC, Canada) were examined using three measures of elemental release reflecting varying degrees of physical mixing and time scales. Aqueous concentrations of Cd, Cu, Pb, and Zn in the interstitial water of...
Quantifying landscape ruggedness for animal habitat analysis: A case study using bighorn sheep in the Mojave Desert
J.M. Sappington, K.M. Longshore, D.B. Thompson
2007, Journal of Wildlife Management (71) 1419-1426
Terrain ruggedness is often an important variable in wildlife habitat models. Most methods used to quantify ruggedness are indices derived from measures of slope and, as a result, are strongly correlated with slope. Using a Geographic Information System, we developed a vector ruggedness measure (VRM) of terrain based on a...
Pintail and mallard survival in California relative to habitat, abundance, and hunting
J. P. Fleskes, J.L. Yee, G.S. Yarris, M. R. Miller, Michael L. Casazza
2007, Journal of Wildlife Management (71) 2238-2248
The influence of habitat, waterfowl abundance, and hunting on winter survival of waterfowl is not well understood. We studied late August-March survival of 163 after-hatch-year (AHY) and 128 hatch-year (HY) female mallards (Anas platyrhynchos) radiotagged in Sacramento Valley (SACV) and 885 AHY female northern pintails (A. acuta) radiotagged throughout the...
Use of the Beaufort Sea by king eiders breeding on the North Slope of Alaska
Laura M. Phillips, A.N. Powell, E.J. Taylor, E.A. Rexstad
2007, Journal of Wildlife Management (71) 1892-1898
We estimated areas used by king eiders (Somateria spectabilis) in the Alaskan Beaufort Sea, how distributions of used areas varied, and characteristics that explained variation in the number of days spent at sea, to provide regulatory agencies with baseline data needed to minimize impacts of potential offshore oil development. We...
