Leonard F. Konikow, E. Kendy
2005, Hydrogeology Journal (13) 317-320
No abstract available....
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Page 2586, results 64626 - 64650
Publication Extents
Not all publications have extents, not all extents are completely accurateM.C. Reheis, R. L. Reynolds, H. Goldstein, H.M. Roberts, J. C. Yount, Y. Axford, L.S. Cummings, N. Shearin
2005, Geological Society of America Bulletin (117) 1051-1069
In upland areas of Canyonlands National Park, Utah, thin deposits and paleosols show late Quaternary episodes of eolian sedimentation, pedogenesis, and climate change. Interpretation of the stratigraphy and optically stimulated luminescence ages of eolian and nearby alluvial deposits, their pollen, and intercalated paleosols yields the following history: (1) Eolian deposition...
J.T. Kulongoski, David R. Hilton, J. A. Izbicki
2005, Geochimica et Cosmochimica Acta (69) 3857-3872
We assess the role of fracturing and seismicity on fluid-driven mass transport of helium using groundwaters from the eastern Morongo Basin (EMB), California, USA. The EMB, located ???200 km east of Los Angeles, lies within a tectonically active region known as the Eastern California Shear Zone that exhibits both strike-slip...
Edward H. Field, N. Gupta, Vipin Gupta, Michael L. Blanpied, Phillip J. Maechling, Thomas H. Jordan
2005, Seismological Research Letters (76) 161-167
We present seismic-hazard calculations for what is arguably the most sophisticated earthquake forecast ever developed—the model by the 2002 Working Group on California Earthquake Probabilities (2003), or WGCEP-2002 as referred to hereafter. These calculations have been made possible by developments in both OpenSHA (Field et al.,...
C.T. Yang, F.J.M. Simoes
2005, Journal of Hydraulic Engineering (131) 413-418
It has been the conventional assumption that wash load is supply limited and is only indirectly related to the hydraulics of a river. Hydraulic engineers also assumed that bed-material load concentration is independent of wash load concentration. This paper provides a detailed analysis of the Yellow River sediment transport data...
G.A. Hodgkins, R. W. Dudley, T.G. Huntington
2005, Climatic Change (71) 319-340
Historical dates of ice-affected flows for 16 rural, unregulated rivers in northern New England, USA were analyzed. The total annual days of ice-affected flow decreased significantly (p < 0.1) over the 20th century at 12 of the 16 rivers. On average, for the nine longest-record rivers, the total annual days...
M.C. Quist, W.A. Hubert, F.J. Rahel
2005, Western North American Naturalist (65) 53-63
Understanding the upstream and downstream effect of impoundments on stream fish assemblages is important in managing fish populations and predicting the effects of future human activities on stream ecosystems. We used information collected over a 41-year period (1960-2001) to assess changes in fish assemblage structure resulting from impoundment of the...
Susan E. Hough
2005, Seismological Research Letters (76) 58-66
On several occasions in recent memory California has experienced apparent clusters of earthquake activity that are too far apart to be considered related according to a classic taxonomy that includes foreshocks, mainshocks, and aftershocks. During a week-long period in July 1986, California experienced the M 6.0 North Palm Springs earthquake,...
C. M. Dohmen-Janssen, D.M. Hanes
2005, Continental Shelf Research (25) 333-347
A series of sand bed experiments was carried out in the Large Wave Flume in Hannover, Germany as a component of the SISTEX99 experiment. The experiments focussed on the dynamic sediment response due to wave group forcing over a flat sand bed in order to improve understanding of cross-shore sediment...
G.M. Marion, J.S. Kargel, D.C. Catling, S.D. Jakubowski
2005, Geochimica et Cosmochimica Acta (69) 259-274
Pressure plays a critical role in controlling aqueous geochemical processes in deep oceans and deep ice. The putative ocean of Europa could have pressures of 1200 bars or higher on the seafloor, a pressure not dissimilar to the deepest ocean basin on Earth (the Mariana Trench at 1100 bars of...
J.L. Palandri, Y.K. Kharaka
2005, Chemical Geology (217) 351-364
We present a novel method for geologic sequestration of anthropogenic CO2 in ferrous carbonate, using ferric iron present in widespread redbeds and other sediments. Iron can be reduced by SO2 that is commonly a component of flue gas produced by combustion of fossil fuel, or by adding SO2 or H2S...
K.L. Manies, J.W. Harden, B. P. Bond-Lamberty, K. P. O’Neill
2005, Canadian Journal of Forest Research (35) 472-482
This study investigated the role of fire-killed woody debris as a source of soil carbon in black spruce (Picea mariana (Mill.) BSP) stands in Manitoba, Canada. We measured the amount of standing dead and downed woody debris along an upland chronosequence, including wood partially and completely covered by moss growth....
T.G. Huntington
2005, Canadian Journal of Forest Research (35) 1109-1121
Forest harvesting and acidic deposition can cause substantial decreases in the calcium (Ca) inventory of forest soils if such losses are not replenished through mineral weathering, atmospheric deposition, or fertilization. The net balance between losses and gains defines the forest Ca status. Site-specific studies have measured Ca pools and fluxes...
P.E. Geissler
2005, Journal of Geophysical Research E: Planets (110) 1-23
The surface of Mars has changed dramatically during the three decades spanned by spacecraft exploration. Comparisons of Mars Global Surveyor images with Viking and Mariner 9 pictures suggest that more than one third of Mars' surface area has brightened or darkened by at least 10%. Such albedo changes could produce...
Steven J. Hamilton, Kevin J. Buhl, Fern A. Bullard, Susan McDonald
2005, Ecotoxicology and Environmental Safety (61) 190-208
Four groups of larval razorback sucker, an endangered fish, were exposed to selenium-laden zooplankton and survival, growth, and whole-body residues were measured. Studies were conducted with 5, 10, 24, and 28-day-old larvae fed zooplankton collected from six sites adjacent to the Green River, Utah. Water where zooplankton were collected had...
Melanie J.L. Driscoll, T. Donovan, R. Mickey, A. Howard, K.K. Fleming
2005, Journal of Wildlife Management (69) 699-709
We collected data on 212 wood thrush (Hylocichla mustelina) nests in central New York from 1998 to 2000 to determine the factors that most strongly influence nest success. We used an information-theoretic approach to assess and rank 9 models that examined the relationship between nest success (i.e., the probability that...
A.M. Roberson, D. E. Andersen, P.L. Kennedy
2005, Journal of Wildlife Management (69) 1240-1250
Broadcast surveys using conspecific calls are currently the most effective method for detecting northern goshawks (Accipiter gentilis) during the breeding season. These surveys typically use alarm calls during the nestling phase and juvenile food-begging calls during the fledgling-dependency phase. Because goshawks are most vocal during the courtship phase, we hypothesized...
M.S. Seyfried, S. Schwinning, Michelle Ann Walvoord, W. T. Pockman, B.D. Newman, R.B. Jackson, F. M. Phillips
2005, Ecology (86) 277-287
The amount and spatial distribution of deep drainage (downward movement of water across the bottom of the root zone) and groundwater recharge affect the quantity and quality of increasingly limited groundwater in arid and semiarid regions. We synthesize research from the fields of ecology and hydrology to address the issue...
Warren B. White, D.R. Cayan, P.P. Niiler, J. Moisan, G. Lagerloef, F. Bonjean, D. Legler
2005, Progress in Oceanography (64) 1-29
This study quantifies uncertainties in closing the seasonal cycle of diabatic heat storage (DHS) over the Pacific Ocean from 20??S to 60??N through the synthesis of World Ocean Circulation Experiment (WOCE) reanalysis products from 1993 to 1999. These products are DHS from Scripps Institution of Oceanography (SIO); near-surface geostrophic and...
T.D. Bullen, S.W. Bailey
2005, Biogeochemistry (74) 63-99
Depletion of calcium from forest soils has important implications for forest productivity and health. Ca is available to fine feeder roots from a number of soil organic and mineral sources, but identifying the primary source or changes of sources in response to environmental change is problematic. We used strontium...
B.A. Middleton, K.L. McKee
2005, Conference Paper, Wetlands Ecology and Management
The ability of baldcypress (Taxodium distichum)swamps to maintain themselves near the northern limit of their range depends on their levels of production, which is not only are response to climate but also to local environmental factors(e.g., impoundment). We asked if primary production was reduced under impounded conditions and if species'...
A. S. Yen, Ralf Gellert, C. Schroder, R.V. Morris, J.F. Bell III, A.T. Knudson, B. C. Clark, D. W. Ming, J.A. Crisp, R. E. Arvidson, D. Blaney, J. Bruckner, P. R. Christensen, D.J. DesMarais, P.A. De Souza Jr., T.E. Economou, A. Ghosh, B.C. Hahn, Kenneth E. Herkenhoff, L.A. Haskin, J.A. Hurowitz, B.L. Joliff, J. R. Johnson, G. Klingelhofer, M.B. Madsen, S. M. McLennan, H.Y. McSween, L. Richter, R. Rieder, D. Rodionov, Laurence A. Soderblom, S. W. Squyres, N.J. Tosca, A. Wang, M. Wyatt, J. Zipfel
2005, Nature (436) 49-54
The mineralogical and elemental compositions of the martian soil are indicators of chemical and physical weathering processes. Using data from the Mars Exploration Rovers, we show that bright dust deposits on opposite sides of the planet are part of a global unit and not dominated by the composition of local...
A.A. Geis, W.J. Barichivich, T. Wibbels, M. Coyne, A.M. Landry Jr., D. Owens
2005, Copeia 393-398
The Kemp's Ridley (Lepidochelys kempii) is one of the most endangered sea turtles in the world, and it possesses temperature-dependent sex determination (TSD). Sex ratios produced under TSD can vary widely and can affect the reproductive ecology of a population. Therefore, sex ratios produced from TSD are of ecological and...
Allan Goddard Lindh
2005, Seismological Research Letters (76) 3-6
No abstract available....
Robert C. Szaro, D.A. Boyce Jr., T. Puchlerz
2005, Landscape and Urban Planning (72) 3-12
Planning activities over large landscapes poses a complex of challenges when trying to balance the implementation of a conservation strategy while still allowing for a variety of consumptive and nonconsumptive uses. We examine a case in southeast Alaska to illustrate the breadth of these challenges and an approach to developing...