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Page 1982, results 49526 - 49550

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Climatic and limnologic setting of Bear Lake, Utah and Idaho
W.E. Dean, W.A. Wurtsbaugh, V.A. Lamarra
2009, Special Paper of the Geological Society of America 1-14
Bear Lake is a large alkaline lake on a high plateau on the Utah-Idaho border. The Bear River was partly diverted into the lake in the early twentieth century so that Bear Lake could serve as a reservoir to supply water for hydropower and irrigation downstream, which continues today. The...
Producing fired bricks using coal slag from a gasification plant in indiana
L.-M. Chen, I.-M. Chou, Sheng-Fu J. Chou, J.W. Stucki
2009, Conference Paper, 3rd World of Coal Ash, WOCA Conference - Proceedings
Integrated gasification combined cycle (IGCC) is a promising power generation technology which increases the efficiency of coal-to-power conversion and enhances carbon dioxide concentration in exhaust emissions for better greenhouse gas capture. Two major byproducts from IGCC plants are bottom slag and sulfur. The sulfur can be processed into commercially viable...
Nesting ecology of Greater Sandhill Cranes (Grus canadensis tabida) in riparian and palustrine wetlands of eastern Idaho
D.B. McWethy, J. E. Austin
2009, Waterbirds (32) 106-115
Little information exists on breeding Greater Sandhill Cranes (Grus canadensis tabida) in riparian wetlands of the Intermountain West. We examined the nesting ecology of Sandhill Cranes associated with riparian and palustrine wetlands in the Henry's Fork Watershed in eastern Idaho in 2003. We located 36 active crane nests, 19 in...
Sediment accumulation on the Southern California Bight continental margin during the twentieth century
C. R. Alexander, H.J. Lee
2009, Special Paper of the Geological Society of America 69-87
Sediment discharged into the portion of the Southern California Bight extending from Santa Barbara to Dana Point enters a complex system of semi-isolated coastal cells, narrow continental shelves, submarine canyons, and offshore basins. On both the Santa Monica and San Pedro margins, 210Pb accumulation rates decrease in an offshore direction...
Lipid reserves of Lesser Scaup (Aythya affinis) migrating across a large landscape are consistent with the "Spring Condition" hypothesis
M.J. Anteau, A. D. Afton
2009, The Auk (126) 873-883
The “spring condition” hypothesis (SCH) states that nutrition during spring migration affects survival, reproductive success, and, ultimately, population size of migratory birds. The North American population of Lesser Scaup (Aythya affinis) has experienced a marked decline, apparently because of poor recruitment. An important prediction of the SCH is that female...
Using U.S. Geological Survey data in material flow analysis: An introduction
S.F. Sibley
2009, Journal of Industrial Ecology (13) 670-673
A few sources of basic data on worldwide raw materials production and consumption exist that are independently developed and freely available to the public. This column is an introduction to the types of information available from the U.S. Geological Survey (USGS), and explains how the data are assembled. The kind...
Territoriality of feral pigs in a highly persecuted population on Fort Benning, Georgia
B.D. Sparklin, M.S. Mitchell, L.B. Hanson, D.B. Jolley, S.S. Ditchkoff
2009, Journal of Wildlife Management (73) 497-502
We examined home range behavior of female feral pigs (Sus scrofa) in a heavily hunted population on Fort Benning Military Reservation in west-central Georgia, USA. We used Global Positioning System location data from 24 individuals representing 18 sounders (i.e., F social groups) combined with markrecapture and camera-trap data to evaluate...
Prevalence of West Nile virus in migratory birds during spring and fall migration
Robert J. Dusek, R. G. McLean, L.D. Kramer, S. R. Ubico, A.P. Dupuis II, G.D. Ebel, S.C. Guptill
2009, American Journal of Tropical Medicine and Hygiene (81) 1151-1158
To investigate the role of migratory birds in the dissemination of West Nile virus (WNV), we measured the prevalence of infectious WNV and specific WNV neutralizing antibodies in birds, principally Passeriformes, during spring and fall migrations in the Atlantic and Mississippi flyways from 2001-2003. Blood samples were obtained from 13,403...
Microbial abundance in the deep subsurface of the Chesapeake Bay impact crater: Relationship to lithology and impact processes
Charles S. Cockell, Aaron L. Gronstal, Mary A. Voytek, Julie D. Kirshtein, Kai Finster, Ward E. Sanford, Mihaela Glamoclija, Gregroy S. Gohn, David S. Powars, J. Wright Horton Jr.
2009, GSA Special Papers (458) 941-950
Asteroid and comet impact events are known to cause profound disruption to surface ecosystems. The aseptic collection of samples throughout a 1.76-km-deep set of cores recovered from the deep subsurface of the Chesapeake Bay impact structure has allowed the study of the subsurface biosphere in a region disrupted by an...
Joint spatiotemporal variability of global sea surface temperatures and global Palmer drought severity index values
S. Apipattanavis, G.J. McCabe, B. Rajagopalan, S. Gangopadhyay
2009, Journal of Climate (22) 6251-6267
Dominant modes of individual and joint variability in global sea surface temperatures (SST) and global Palmer drought severity index (PDSI) values for the twentieth century are identified through a multivariate frequency domain singular value decomposition. This analysis indicates that a secular trend and variability related to the El Niño–Southern Oscillation...
Reservoir uncertainty, Precambrian topography, and carbon sequestration in the Mt. Simon Sandstone, Illinois Basin
H.E. Leetaru, J.H. McBride
2009, Environmental Geosciences (16) 235-243
Sequestration sites are evaluated by studying the local geological structure and confirming the presence of both a reservoir facies and an impermeable seal not breached by significant faulting. The Cambrian Mt. Simon Sandstone is a blanket sandstone that underlies large parts of Midwest United States and is this region's most...
Effects of fire temperature on the physical and chemical characteristics of the ash from two plots of Cork oak (Quercus Suber)
X. Ubeda, P. Pereira, L. Outeiro, D.A. Martin
2009, Land Degradation and Development (20) 589-608
Cork oak, (Quercus suber) is widely distributed in the Mediterranean region, an area subject to frequent fires. The ash produced by burning can have impacts on the soil status and water resources that can differ according to the temperature reached during fire and the characteristics of the litter, defined as...
Habitat-specific breeder survival of Florida Scrub-Jays: Inferences from multistate models
D.R. Breininger, J.D. Nichols, G.M. Carter, D.M. Oddy
2009, Ecology (90) 3180-3189
Quantifying habitat-specific survival and changes in habitat quality within disturbance-prone habitats is critical for understanding population dynamics and variation in fitness, and for managing degraded ecosystems. We used 18 years of color-banding data and multistate capture-recapture models to test whether habitat quality within territories influences survival and detection probability of...
Analysis of dynamic thresholds for the normalized difference water index
Lei Ji, Li Zhang, Bruce K. Wylie
2009, Photogrammetric Engineering and Remote Sensing (75) 1307-1317
The normalized difference water index (NDWI) has been successfully used to delineate surface water features. However, two major problems have been often encountered: (a) NDWIs calculated from different band combinations [visible, nearinfrared, or shortwave-infrared (SWIR)] can generate different results, and (b) NDWI thresholds vary depending on the proportions of subpixel...
Cataloging the 1811-1812 New Madrid, central U.S., earthquake sequence
S. E. Hough
2009, Seismological Research Letters (80) 1045-1053
The three principal New Madrid, central U.S., mainshocks of 1811-1812 were followed by extensive aftershock sequences that included numerous felt events. Although no instrumental data are available for the sequence, historical accounts provide information that can be used to estimate magnitudes and locations for the large aftershocks as well as...
Numerical simulations and observations of surface wave fields under an extreme tropical cyclone
Y. Fan, I. Ginis, T. Hara, C. W. Wright, E.J. Walsh
2009, Journal of Physical Oceanography (39) 2097-2116
The performance of the wave model WAVEWATCH III under a very strong, category 5, tropical cyclone wind forcing is investigated with different drag coefficient parameterizations and ocean current inputs. The model results are compared with field observations of the surface wave spectra from an airborne scanning radar altimeter, National Data...
Masticophis flagellum selects florida scrub habitat at multiple spatial scales
B.J. Halstead, H.R. Mushinsky, E.D. McCoy
2009, Herpetologica (65) 268-279
The use of space by individual animals strongly influences the spatial extent, abundance, and growth rates of their populations. We analyzed the spatial ecology and habitat selection of Masticophis flagellum (the coachwhip) at three different scales to determine which habitats are most important to this species. Home ranges and mean...
Unraveling the stratigraphy of the Oriskany Sandstone: A necessity in assessing its site-specific carbon sequestration potential
J. Kostelnik, K.M. Carter
2009, Environmental Geosciences (16) 187-200
The widespread distribution, favorable reservoir characteristics, and depth make the Lower Devonian Oriskany Sandstone a viable sequestration target in the Appalachian Basin. The Oriskany Sandstone is thickest in the structurally complex Ridge and Valley Province, thins toward the northern and western basin margins, and is even absent in other parts...
Seasonal shifts in shelter and microhabitat use of drymarchon couperi (eastern indigo snake) in Georgia
N.L. Hyslop, R.J. Cooper, J.M. Meyers
2009, Copeia (2009) 458-464
Drymarchon couperi (Eastern Indigo Snake), a threatened species of the southeastern Coastal Plain of the United States, has experienced population declines because of extensive habitat loss and degradation across its range. In Georgia and northern Florida, the species is associated with longleaf pine habitats that support Gopherus polyphemus (Gopher Tortoise)...
Landsliding in partially saturated materials
J. W. Godt, R.L. Baum, N. Lu
2009, Geophysical Research Letters (36)
Rainfall‐induced landslides are pervasive in hillslope environments around the world and among the most costly and deadly natural hazards. However, capturing their occurrence with scientific instrumentation in a natural setting is extremely rare. The prevailing thinking on landslide initiation, particularly for those landslides that occur under intense precipitation, is that...
Volcanic hazards to airports
Marianne C. Guffanti, Gari C. Mayberry, Thomas J. Casadevall, Richard Wunderman
2009, Natural Hazards (51) 287-302
Volcanic activity has caused significant hazards to numerous airports worldwide, with local to far-ranging effects on travelers and commerce. Analysis of a new compilation of incidents of airports impacted by volcanic activity from 1944 through 2006 reveals that, at a minimum, 101 airports in 28 countries were affected on 171...
Geological factors affecting CO2 plume distribution
S.M. Frailey, H. Leetaru
2009, Conference Paper, Energy Procedia
Understanding the lateral extent of a CO2 plume has important implications with regards to buying/leasing pore volume rights, defining the area of review for an injection permit, determining the extent of an MMV plan, and managing basin-scale sequestration from multiple injection sites. The vertical and lateral distribution of CO2 has...
Consistency between hydrological models and field observations: Linking processes at the hillslope scale to hydrological responses at the watershed scale
M.P. Clark, D.E. Rupp, R.A. Woods, Meerveld H. J. Tromp-van H. J., N.E. Peters, J.E. Freer
2009, Hydrological Processes (23) 311-319
The purpose of this paper is to identify simple connections between observations of hydrological processes at the hillslope scale and observations of the response of watersheds following rainfall, with a view to building a parsimonious model of catchment processes. The focus is on the well-studied Panola Mountain Research Watershed (PMRW),...
Constraining earthquake source inversions with GPS data: 2. A two-step approach to combine seismic and geodetic data sets
S. Custodio, M.T. Page, R.J. Archuleta
2009, Journal of Geophysical Research B: Solid Earth (114)
We present a new method to combine static and wavefield data to image earthquake ruptures. Our combined inversion is a two-step procedure, following the work of Hernandez et al. (1999), and takes into account the differences between the resolutions of the two data sets. The first step consists of an...
Postseismic relaxation following the 1992 M7.3 Landers and 1999 M7.1 Hector Mine earthquakes, southern California
J.C. Savage, J. L. Svarc
2009, Journal of Geophysical Research B: Solid Earth (114)
Postseismic relaxation (measured postseismic deformation less the deformation that would have occurred at the preseismic rate) has been monitored at the same 10 monuments over ???6 years following both the 1992 Landers and the 1999 Hector Mine earthquakes. For both earthquakes the displacement components of the observed relaxation are well...