Comparison with CLPX II airborne data using DMRT model
X. Xu, D. Liang, K.M. Andreadis, L. Tsang, E.G. Josberger
2009, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
In this paper, we considered a physical-based model which use numerical solution of Maxwell Equations in three-dimensional simulations and apply into Dense Media Radiative Theory (DMRT). The model is validated in two specific dataset from the second Cold Land Processes Experiment (CLPX II) at Alaska and Colorado. The data were...
Improving accessibility to geospatial data using geographic search
J.E. Williams, M.L. Allison, J.B. Kozman
2009, Conference Paper, 2009 17th International Conference on Geoinformatics, Geoinformatics 2009
[No abstract available]...
Silt and gas accumulation beneath an artificial recharge spreading basin, Southwestern Utah, U.S.A.
V.M. Heilweil, D. K. Solomon, G. Ortiz
2009, Boletin Geologico y Minero (120) 185-196
Sand Hollow Reservoir in southwestern Utah, USA, is operated for both surface-water storage and artificial recharge to the underlying Navajo Sandstone. The total volume of estimated artificial recharge between 2002 and 2007 is 85 million cubic meters (69,000 acre-feet). Since 2002, artificial recharge rates have generally been declining and are...
Polydactyly in the central pacific gecko, Lepidodactylus sp. (Squamata: Gekkonidae)
A.M. Bauer, S.A. Hathaway, Robert N. Fisher
2009, Herpetology Notes (2) 243-246
We report the first known case of naturally occurring polydactyly in a gekkotan lizard. A single individual from Palmyra Atoll exhibited a triplication of digit III of the m hand. No obvious teratogenic sources are present on the atoll and the causal factors of polydactyly in Lepidodactylus sp. remain unknown....
Allen's big-eared bat (Idionycteris phyllotis) documented in colorado based on recordings of its distinctive echolocation call
M. A. Hayes, K.W. Navo, L. Bonewell, C.J. Mosch, Rick A. Adams
2009, Southwestern Naturalist (54) 499-501
Allen's big-eared bat (Idionycteris phyllotis) inhabits much of the southwestern USA, but has not been documented in Colorado. We recorded echolocation calls consistent with I. phyllotis near La Sal Creek, Montrose County, Colorado. Based on characteristics of echolocation calls and flight behavior, we conclude that the echolocation calls described here...
Pliocene three-dimensional global ocean temperature reconstruction
H.J. Dowsett, M.M. Robinson, K.M. Foley
2009, Climate of the Past (5) 769-783
The thermal structure of the mid-Piacenzian ocean is obtained by combining the Pliocene Research, Interpretation and Synoptic Mapping Project (PRISM3) multiproxy sea-surface temperature (SST) reconstruction with bottom water temperature estimates from 27 locations produced using Mg/Ca paleothermometry based upon the ostracod genus Krithe. Deep water temperature estimates are skewed toward...
Migration patterns and wintering range of common loons breeding in the Northeastern United States
K.P. Kenow, D. Adams, N. Schoch, D.C. Evers, W. Hanson, D. Yates, L. Savoy, T.J. Fox, A. Major, R. Kratt, J. Ozard
2009, Waterbirds (32) 234-247
A study, using satellite telemetry, was conducted to determine the precise migration patterns and wintering locations of Common Loons (Gavia immer) breeding in the northeastern United States. Transmitters were implanted in 17 loons (16 adults and one juvenile) that were captured on breeding lakes in New York, New Hampshire, and...
Water level observations in mangrove swamps during two hurricanes in Florida
K. W. Krauss, T.W. Doyle, T.J. Doyle, C.M. Swarzenski, A.S. From, Richard H. Day, W.H. Conner
2009, Wetlands (29) 142-149
Little is known about the effectiveness of mangroves in suppressing water level heights during landfall of tropical storms and hurricanes. Recent hurricane strikes along the Gulf Coast of the United States have impacted wetland integrity in some areas and hastened the need to understand how and to what degree coastal...
Hand-mouth transfer and potential for exposure to E. coli and F+ coliphage in beach sand, Chicago, Illinois
R.L. Whitman, K. Przybyla-Kelly, D.A. Shively, M.B. Nevers, M.N. Byappanahalli
2009, Journal of Water and Health (7) 623-629
Beach sand contains fecal indicator bacteria, often in densities greatly exceeding the adjacent swimming waters. We examined the transferability of Escherichia coli and F+ coliphage (MS2) from beach sand to hands in order to estimate the potential subsequent health risk. Sand with high initial E. coli concentrations was collected from...
Revised Dst and the epicycles of magnetic disturbance: 1958-2007
J.J. Love, J.L. Gannon
2009, Annales Geophysicae (27) 3101-3131
A revised version of the storm-time disturbance index Dst is calculated using hourly-mean magnetic-observatory data from four standard observatories and collected over the years 1958-2007. The calculation algorithm is a revision of that established by Sugiura et al., and which is now used by the Kyoto World Data Center for...
Petrographic observations on the Exmore breccia, ICDP-USGS drilling at Eyreville, Chesapeake Bay impact structure, USA
W.U. Reimold, K. Bartosova, R.T. Schmitt, B. Hansen, C. Crasselt, C. Koeberl, A. Wittmann, D.S. Powars
2009, Special Paper of the Geological Society of America 655-698
The International Continental Scientific Drilling Program (ICDP)-U.S. Geological Survey (USGS) Eyreville A and B drill cores sampled crater fill in the region of the crater moat, ??9 km to the NE of the center of the Chesapeake Bay impact structure, Virginia, USA. They provide a 953 m section (444-1397 m...
Coastal marsh response to historical and future sea-level acceleration
M. Kirwan, S. Temmerman
2009, Quaternary Science Reviews (28) 1801-1808
We consider the response of marshland to accelerations in the rate of sea-level rise by utilizing two previously described numerical models of marsh elevation. In a model designed for the Scheldt Estuary (Belgium-SW Netherlands), a feedback between inundation depth and suspended sediment concentrations allows marshes to quickly adjust their elevation...
Basanite-nephelinite suite from early Kilauea: Carbonated melts of phlogopite-garnet peridotite at Hawaii's leading magmatic edge
T. W. Sisson, Jun-Ichi Kimura, M.L. Coombs
2009, Contributions to Mineralogy and Petrology (158) 803-829
A basanite-nephelinite glass suite from early submarine Kilauea defines a continuous compositional array marked by increasing concentrations of incompatible components with decreasing SiO2, MgO, and Al2O3. Like peripheral and post-shield strongly alkalic Hawaiian localities (Clague et al. in J Volcanol Geotherm Res 151:279-307, 2006; Dixon et al. in J Pet...
Decision making with epistemic uncertainty under safety constraints: An application to seismic design
D. Veneziano, A. Agarwal, E. Karaca
2009, Probabilistic Engineering Mechanics (24) 426-437
The problem of accounting for epistemic uncertainty in risk management decisions is conceptually straightforward, but is riddled with practical difficulties. Simple approximations are often used whereby future variations in epistemic uncertainty are ignored or worst-case scenarios are postulated. These strategies tend to produce sub-optimal decisions. We develop a general framework...
Time-series modeling of reservoir effects on river nitrate concentrations
A.L. Schoch, K. E. Schilling, K.-S. Chan
2009, Advances in Water Resources (32) 1197-1205
Saylorville Reservoir is a 24.1 km2 impoundment of the Des Moines River located approximately 10 km north of the City of Des Moines, Iowa, USA. Surface water from the Des Moines River used for drinking water supply is impaired for nitrate-nitrogen. Monthly mean nitrate concentration data collected upstream and downstream...
Soil and nutrient retention in winter-flooded ricefields with implications for watershed management
S.W. Manley, R.M. Kaminski, P.B. Rodrigue, J.C. Dewey, S.H. Schoenholtz, P.D. Gerard, K. J. Reinecke
2009, Journal of Soil and Water Conservation (64) 173-182
The ability of water resources to support aquatic life and human needs depends, in part, on reducing nonpoint source pollution amid contemporary agricultural practices. Winter retention of shallow water on rice and other agricultural fields is an accepted management practice for wildlife conservation; however, soil and water conservation benefits are...
Field camp: Using traditional methods to train the next generation of petroleum geologists
J.O. Puckette, N.H. Suneson
2009, Special Paper of the Geological Society of America 25-34
The summer field camp experience provides many students with their best opportunity to learn the scientific process by making observations and collecting, recording, evaluating, and interpreting geologic data. Field school projects enhance student professional development by requiring cooperation and interpersonal interaction, report writing to communicate interpretations, and the development of...
Geomorphic changes resulting from floods in reconfigured gravel-bed river channels in Colorado, USA
J. G. Elliott, J.P. Capesius
2009, Special Paper of the Geological Society of America 173-198
Geomorphic changes in reconfi gured reaches of three Colorado rivers in response to floods in 2005 provide a benchmark for "restoration" assessment. Sedimententrainment potential is expressed as the ratio of the shear stress from the 2 yr, 5 yr, 10 yr, and 2005 floods to the critical shear stress for...
Megablocks and melt pockets in the Chesapeake Bay impact structure constrained by magnetic field measurements and properties of the Eyreville and Cape Charles cores
A. K. Shah, D. L. Daniels, A. Kontny, J. Brozena
2009, Special Paper of the Geological Society of America 195-208
We use magnetic susceptibility and remanent magnetization measurements of the Eyreville and Cape Charles cores in combination with new and previously collected magnetic field data in order to constrain structural features within the inner basin of the Chesapeake Bay impact structure. The Eyreville core shows the first evidence of several-hundred-meter-thick...
Submarine canyon and fan systems of the California Continental Borderland
W. R. Normark, D.J.W. Piper, B.W. Romans, J.A. Covault, P. Dartnell, R. W. Sliter
2009, Special Paper of the Geological Society of America 141-168
Late Quaternary turbidite and related gravity-flow deposits have accumulated in basins of the California Borderland under a variety of conditions of sediment supply and sea-level stand. The northern basins (Santa Barbara, Santa Monica, and San Pedro) are closed and thus trap virtually all sediment supplied through submarine canyons and smaller...
Short-term effects of hurricane disturbance on food availability for migrant songbirds during autumn stopover
R.C. Dobbs, W.C. Barrow Jr., C.W. Jeske, J. Dimiceli, T.C. Michot, J.W. Beck
2009, Wetlands (29) 123-134
Understanding the consequences of hurricanes on the food resources available to neotropical-nearctic migrant songbirds may provide important insight into the effects of hurricanes on migratory populations. During autumn migration 2006 we investigated the foraging ecology of two species of insectivorous migrants, Blue-gray Gnatcatcher (Polioptila caerulea) and Yellow Warbler (Dendroica petechia),...
Neotectonic analysis of upper klamath lake, oregon: New insights from seismic reflection data
L.M. Liberty, T. L. Pratt, M. Lyle, I. P. Madin
2009, Special Paper of the Geological Society of America 71-82
We present marine high-resolution seismic reflection data from Upper Klamath Lake, Oregon, to discern the underlying structure and estimate Quaternary slip rates in this actively extending Basin and Range system. The sediment patterns and structures imaged on our seismic profiles reveal a complex geologic system that reflects a changing climate...
Rocky Mountain evolution: Tying Continental Dynamics of the Rocky Mountains and Deep Probe seismic experiments with receiver functions
E.-M. Rumpfhuber, Gordon R. Keller, E. Sandvol, A.A. Velasco, D.C. Wilson
2009, Journal of Geophysical Research B: Solid Earth (114)
In this study, we have determined the crustal structure using three different receiver function methods using data collected from the northern transect of the Continental Dynamics of the Rocky Mountains (CD-ROM) experiment. The resulting migrated image and crustal thickness determinations confirm and refine prior crustal thickness measurements based on the...
Ultraviolet-ozone treatment reduces levels of disease-associated prion protein and prion infectivity
C.J. Johnson, P. Gilbert, D. McKenzie, J.A. Pedersen, Judd M. Aiken
2009, BMC Research Notes (2)
Background. Transmissible spongiform encephalopathies (TSEs) are a group of fatal neurodegenerative diseases caused by novel infectious agents referred to as prions. Prions appear to be composed primarily, if not exclusively, of a misfolded isoform of the cellular prion protein. TSE infectivity is remarkably stable and can resist many aggressive decontamination...
Factors associated with arrival densities of grasshopper sparrow (Ammodramus savannarum) and baird's sparrow (A. bairdii) in the upper great plains
M.A. Ahlering, Douglas H. Johnson, John Faaborg
2009, The Auk (126) 799-808
Although critical to habitat and population management, the proximate cues that birds use to establish territories are largely unknown. Understanding these cues is important for birds, such as many grassland birds, that exhibit high annual variability in population density and make new habitat-selection decisions annually. Identifying the actual cues used...
