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Page 168, results 4176 - 4200

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Distribution and density of moose in relation to landscape characteristics: Effects of scale
J.A.K. Maier, J. M. Ver Hoef, A. D. McGuire, R.T. Bowyer, L. Saperstein, H.A. Maier
2005, Conference Paper, Canadian Journal of Forest Research
We analyzed the relation between early winter distribution and density of female moose (Alces alces L.) and habitat heterogeneity in interior Alaska. We tested for effects of vegetation type, topography, distance to rivers and towns, occurrence and timing of fire, and landscape metrics. A spatial linear model was used to...
Fire effects on soil organic matter content, composition, and nutrients in boreal interior Alaska
J. C. Neff, J.W. Harden, G. Gleixner
2005, Conference Paper, Canadian Journal of Forest Research
Boreal ecosystems contain a substantial fraction of the earth's soil carbon stores and are prone to frequent and severe wildfires. In this study, we examine changes in element and organic matter stocks due to a 1999 wildfire in Alaska. One year after the wildfire, burned soils contained between 1071 and...
Chloroethene biodegradation in sediments at 4°C
P. M. Bradley, S. Richmond, F. H. Chapelle
2005, Applied and Environmental Microbiology (71) 6414-6417
Microbial reductive dechlorination of [1,2-14C]trichloroethene to [14C]cis-dichloroethene and [14C]vinyl chloride was observed at 4°C in anoxic microcosms prepared with cold temperature-adapted aquifer and river sediments from Alaska. Microbial anaerobic oxidation of [1,2-14C]cis-dichloroethene and [1,2-14C]vinyl chloride to 14CO2 also was observed under these conditions.  ...
Role of land-surface changes in arctic summer warming
F. S. Chapin III, M. Sturm, Mark C. Serreze, J.P. McFadden, J.R. Key, A.H. Lloyd, A. D. McGuire, T.S. Rupp, A.H. Lynch, Joshua P. Schimel, J. Beringer, W.L. Chapman, H.E. Epstein, E.S. Euskirchen, L. D. Hinzman, G. Jia, C.-L. Ping, K.D. Tape, C.D.C. Thompson, D.A. Walker, J.M. Welker
2005, Science (310) 657-660
A major challenge in predicting Earth's future climate state is to understand feedbacks that alter greenhouse-gas forcing. Here we synthesize field data from arctic Alaska, showing that terrestrial changes in summer albedo contribute substantially to recent high-latitude warming trends. Pronounced terrestrial summer warming in arctic Alaska correlates with a lengthening...
Evaluation of wolf density estimation from radiotelemetry data
John W. Burch, Layne G. Adams, Erich H. Follmann, Eric A. Rexstad
2005, Wildlife Society Bulletin (33) 1225-1236
Density estimation of wolves (Canis lupus) requires a count of individuals and an estimate of the area those individuals inhabit. With radiomarked wolves, the count is straightforward but estimation of the area is more difficult and often given inadequate attention. The population area, based on the mosaic of pack territories,...
Evolving force balance at Columbia Glacier, Alaska, during its rapid retreat
Shad O’Neel, W.T. Pfeffer, R. Krimmel, M. Meier
2005, Journal of Geophysical Research F: Earth Surface (110)
Changes in driving and resistive stresses play an essential role in governing the buoyancy forces that are important controls on the speed and irreversibility of tidewater glacier retreats. We describe changes in geometry, velocity, and strain rate and present a top-down force balance analysis performed over the lower reach of...
The dynamic response of Kennicott Glacier, Alaska, USA, to the Hidden Creek Lake outburst flood
R. Scott Anderson, J. S. Walder, S.P. Anderson, D.C. Trabant, A. G. Fountain
2005, Annals of Glaciology (40) 237-242
Glacier sliding is commonly linked with elevated water pressure at the glacier bed. Ice surface motion during a 3 week period encompassing an outburst of ice-dammed Hidden Creek Lake (HCL) at Kennicott Glacier, Alaska, USA, showed enhanced sliding during the flood. Two stakes, 1.2 km from HCL, revealed increased speed...
Ice elevations and surface change on the Malaspina Glacier, Alaska
J. Sauber, B. Molnia, C. Carabajal, S. Luthcke, R. Muskett
2005, Geophysical Research Letters (32) 1-4
Here we use Ice, Cloud and land Elevation Satellite (ICESat)-derived elevations and surface characteristics to investigate the Malaspina Glacier of southern Alaska. Although there is significant elevation variability between ICESat tracks on this glacier, we were able to discern general patterns in surface elevation change by using a regional digital...
InSAR studies of Alaska volcanoes
Zhong Lu, Chuck Wicks, Daniel Dzurisin, John A. Power
2005, Korean Journal of Remote Sensing (21) 59-72
Interferometric synthetic aperture radar (InSAR) is a remote sensing technique capable of measuring ground surface deformation with sub-centimeter precision and spatial resolution in tens-of­meters over a large region. This paper describes basics of InSAR and highlights our studies of Alaskan volcanoes with InSAR images acquired from European ERS-l and ERS-2,...
Examples
Trent L. McDonald, Steven C. Amstrup, Eric V. Regehr, Bryan F.J. Manly
Steven C. Amstrup, Trent L. McDonald, Bryan F.J. Manly, editor(s)
2005, Book chapter, Handbook of capture-recapture analysis
No abstract available....
Polar climate: Arctic sea ice
R. S. Stone, David C. Douglas, G. I. Belchansky, S. D. Drobot
2005, Bulletin of the American Meteorological Society (86) S39-S41
Recent decreases in snow and sea ice cover in the high northern latitudes are among the most notable indicators of climate change. Northern Hemisphere sea ice extent for the year as a whole was the third lowest on record dating back to 1973, behind 1995 (lowest) and 1990 (second lowest;...
USA: Glacier National Park, Biosphere Reserve and GLORIA Site
Daniel B. Fagre
Cathy Lee, Thomas Schaaf, Paul Simmonds, editor(s)
2004, Conference Paper, Global change research in mountain biosphere reserves
The National Park Service of the United States has 388 designated protected areas and parks that include historic and cultural sites as well as ‘natural resource’ parks set aside for their unique and outstanding natural features. Early efforts to create parks were focused on areas of beauty or unusual features...
Mineral resource of the month: lead
Gerald R. Smith
2004, Geotimes (2004)
The United States is a major producer and consumer of refined lead, representing almost one quarter of total world production and consumption. Two mines in Alaska and six in Missouri accounted for 97 percent of domestic lead production in 2002. The United States also imports enough refined lead to satisfy...
Chloroethene biodegradation potential, ADOT/PF Peger Road Maintenance Facility, Fairbanks, Alaska
Paul M. Bradley, Frances H. Chapelle
2004, Open-File Report 2004-1428
A series of 14C-radiotracer-based microcosm experiments were conducted to assess: 1) the extent, rate and products of microbial dechlorination of trichloroethene (TCE), cis-dichloroethene (cis-DCE) and vinyl chloride (VC) in sediments at the Peger Road site; 2) the effect of three electron donor amendments (molasses, shrimp and crab chitin, and 'Hydrogen...
Collection, analysis, and age-dating of sediment cores from 56 U.S. lakes and reservoirs sampled by the U.S. Geological Survey, 1992-2001
Peter Van Metre, Jennifer T. Wilson, Christopher C. Fuller, Edward Callender, Barbara Mahler
2004, Scientific Investigations Report 2004-5184
The U.S. Geological Survey Reconstructed Trends National Synthesis study collected sediment cores from 56 lakes and reservoirs between 1992 and 2001 across the United States. Most of the sampling was conducted as part of the National Water-Quality Assessment (NAWQA) Program. The primary objective of the study was to determine trends...
Biomonitoring of Environmental Status and Trends (BEST) Program: Environmental contaminants and their effects on fish in the Yukon River Basin
Jo Ellen Hinck, Timothy M. Bartish, Vicki Blazer, Nancy D. Denslow, Tim S. Gross, Mark S. Myers, Patrick J. Anderson, Carl E. Orazio, Donald E. Tillitt
2004, Scientific Investigations Report 2004-5285
This project collected, examined, and analyzed 217 fish representing three species at 10 stations in the U.S. portion of the Yukon River Basin (YRB) from May to October 2002. Four sampling sites were located on the Yukon River; two were located on the Porcupine River, and one site was on...
Oil and gas assessment of Yukon Flats, East-Central Alaska, 2004
Richard G. Stanley, Thomas S. Ahlbrandt, Ronald R. Charpentier, Troy A. Cook, Jesse M. Crews, Timothy R. Klett, Paul G. Lillis, Robert L. Morin, Jeffrey D. Phillips, Richard M. Pollastro, Elisabeth L. Rowan, Richard W. Saltus, Christopher J. Schenk, Megan K. Simpson, Alison B. Till, Sandra M. Troutman, James W. Hendley II
2004, Fact Sheet 2004-3121
Surficial materials in the conterminous United States
David R. Soller, Marith C. Reheis
2004, Open-File Report 2003-275
Introduction: The Earth's bedrock is overlain in many places by a loosely compacted and mostly unconsolidated blanket of sediments in which soils commonly are developed. These sediments generally were eroded from underlying rock, and then were transported and deposited. In places, they exceed 1,000 ft (330 m) in thickness. Where...