Classification of MEC with the ALLTEM at Camp Stanley, Texas
T. Asch, C. Moulton, D.V. Smith
2011, SEG Technical Program Expanded Abstracts (30) 1363-1367
The ALLTEM is a multi-axis electromagnetic induction system designed for unexploded ordnance UXO applications. It uses a continuous triangle-wave excitation and provides good late-time signal-to-noise ratio SNR especially for ferrous targets. Multi-axis transmitter Tx and receiver Rx systems such as ALLTEM provide a richer data set from which to invert...
Calibration of Nu-Instruments Noblesse multicollector mass spectrometers for argon isotopic measurements using a newly developed reference gas
M.A. Coble, M. Grove, A.T. Calvert
2011, Chemical Geology (290) 75-87
The greatest challenge limiting 40Ar/39Ar multicollection measurements is the availability of appropriate standard gasses to intercalibrate detectors. In particular, use of zoom lens ion-optics to steer and focus ion beams into a fixed detector array (i.e., Nu Instruments Noblesse) makes intercalibration of multiple detectors challenging because different ion-optic tuning conditions are...
A Web-Based Decision Support System for Assessing Regional Water-Quality Conditions and Management Actions
N.L. Booth, E.J. Everman, I.-L. Kuo, L. Sprague, L. Murphy
2011, Journal of the American Water Resources Association (47) 1136-1150
The U.S. Geological Survey National Water Quality Assessment Program has completed a number of water-quality prediction models for nitrogen and phosphorus for the conterminous United States as well as for regional areas of the nation. In addition to estimating water-quality conditions at unmonitored streams, the calibrated SPAtially Referenced Regressions On...
Wave characteristic and morphologic effects on the onshore hydrodynamic response of tsunamis
A. Apotsos, B. Jaffe, G. Gelfenbaum
2011, Coastal Engineering (58) 1034-1048
While the destruction caused by a tsunami can vary significantly owing to near- and onshore controls, we have only a limited quantitative understanding of how different local parameters influence the onshore response of tsunamis. Here, a numerical model based on the non-linear shallow water equations is first shown to agree...
Constraints on mechanisms for the growth of gully alcoves in Gasa crater, Mars, from two-dimensional stability assessments of rock slopes
C.H. Okubo, L.L. Tornabene, N.L. Lanza
2011, Icarus (211) 207-221
The value of slope stability analyses for gaining insight into the geologic conditions that would facilitate the growth of gully alcoves on Mars is demonstrated in Gasa crater. Two-dimensional limit equilibrium methods are used in conjunction with high-resolution topography derived from stereo High Resolution Imaging Science Experiment (HiRISE) imagery. These...
Reservoir characterization of the Mt. Simon Sandstone, Illinois Basin, USA
S.M. Frailey, J. Damico, H.E. Leetaru
2011, Conference Paper
The integration of open hole well log analyses, core analyses and pressure transient analyses was used for reservoir characterization of the Mt. Simon sandstone. Characterization of the injection interval provides the basis for a geologic model to support the baseline MVA model, specify pressure design requirements of surface equipment,...
Distribution of lake sturgeon in New York: 11 years of restoration management
Marc Chalupnicki, Dawn E. Dittman, D.M. Carlson
2011, American Midland Naturalist (165) 364-371
Lake sturgeon (Acipenser fulvescens) are native within the Lake Ontario drainage basin and listed as threatened by New York State. In 1995 the New York State Department of Environmental Conservation (NYSDEC) initiated restoration management of lake sturgeon. This management included both protection of extant populations and stocking of uninhabited...
Arsenic in sediments, groundwater, and streamwater of a glauconitic Coastal Plain terrain, New Jersey, USA-Chemical " fingerprints" for geogenic and anthropogenic sources
Julia Barringer, Pamela A. Reilly, D. D. Eberl, A.E. Blum, J.L. Bonin, Robert Rosman, B. Hirst, M. Alebus, K. Cenno, M. Gorska
2011, Applied Geochemistry (26) 763-776
Glauconite-bearing deposits are found worldwide, but As levels have been determined for relatively few. The As content of glauconites in sediments of the Inner Coastal Plain of New Jersey can exceed 100 mg/kg, and total As concentrations (up to 5.95 μg/L) found historically and recently in streamwaters exceed the State standard. In...
History of plains resurfacing in the Scandia region of Mars
Kenneth L. Tanaka, Corey M. Fortezzo, Rosalyn K. Hayward, J. Alexis P. Rodriguez, James A. Skinner
2011, Planetary and Space Science (59) 1128-1142
We present a preliminary photogeologic map of the Scandia region of Mars with the objective of reconstructing its resurfacing history. The Scandia region includes the lower section of the regional lowland slope of Vastitas Borealis extending about 500–1800 km away from Alba Mons into the Scandia sub-basin below −4800 m...
Hillslope chemical weathering across Paraná, Brazil: a data mining-GIS hybrid approach
Fabio Iwashita, Michael J. Friedel, Carlos Roberto de Souza Filho, Stephen J. Fraser
2011, Geomorphology (132) 167-175
Self-organizing map (SOM) and geographic information system (GIS) models were used to investigate the nonlinear relationships associated with geochemical weathering processes at local (~100 km2) and regional (~50,000 km2) scales. The data set consisted of 1) 22 B-horizon soil variables: P, C, pH, Al, total acidity, Ca, Mg, K, total cation exchange...
Status and trend of the Kittlitz's Murrelet Brachyramphus brevirostris in Glacier Bay, Alaska
John F. Piatt, Mayumi L. Arimitsu, Gary S. Drew, Erica N. Madison, James L. Bodkin, Marc D. Romano
2011, Marine Ornithology: Journal of Seabird Research and Conservation (39) 65-75
We conducted standardized surveys for marine birds in Glacier Bay in seven years between 1991 and 2008. From our most recent survey, a combination of line- and strip-transect methods completed in 2008, we estimated that 4981 (95% CI 1293–8670) Kittlitz’s Murrelets Brachyramphus brevirostris resided in Glacier Bay during the month...
Spatial mapping of mineralization with manganese-enhanced magnetic resonance imaging
I.E. Chesnick, J.A. Centeno, T.I. Todorov, A.E. Koenig, K. Potter
2011, Bone (48) 1194-1201
Paramagnetic manganese can be employed as a calcium surrogate to sensitize the magnetic resonance imaging (MRI) technique to the processing of calcium during the bone formation process. At low doses, after just 48h of exposure, osteoblasts take up sufficient quantities of manganese to cause marked reductions in the water proton...
Paleoceanographic changes on the Farallon Escarpment off central California during the last 16,000 years
M. McGann
2011, Quaternary International (235) 26-39
New benthic and planktic foraminiferal assemblage census data and Benthic Foraminiferal Oxygen Index (BFOI) values, previously published marine climate proxy data (stable isotopes and Ca/Cd), and unpublished results of total carbon, organic carbon, and calcium carbonate analyses of sediments recovered off central California on the Farallon Escarpment (1605m water depth;...
Effects of biologically-active chemical mixtures on fish in a wastewater-impacted urban stream
L. B. Barber, G.K. Brown, T.G. Nettesheim, E.W. Murphy, S.E. Bartell, H.L. Schoenfuss
2011, Science of the Total Environment (409) 4720-4728
Stream flow in urban aquatic ecosystems often is maintained by water-reclamation plant (WRP) effluents that contain mixtures of natural and anthropogenic chemicals that persist through the treatment processes. In effluent-impacted streams, aquatic organisms such as fish are continuously exposed to biologically-active chemicals throughout their life cycles. The North Shore Channel...
Predicting breeding habitat for amphibians: A spatiotemporal analysis across Yellowstone National Park
Paul E. Bartelt, Alisa L. Gallant, Robert W. Klaver, C.K. Wright, Debra A. Patla, Charles R. Peterson
2011, Ecological Applications (21) 2530-2547
The ability to predict amphibian breeding across landscapes is important for informing land management decisions and helping biologists better understand and remediate factors contributing to declines in amphibian populations. We built geospatial models of likely breeding habitats for each of four amphibian species that breed in Yellowstone National Park (YNP)....
Modeling hot spring chemistries with applications to martian silica formation
G.M. Marion, D.C. Catling, J.K. Crowley, J.S. Kargel
2011, Icarus (212) 629-642
Many recent studies have implicated hydrothermal systems as the origin of martian minerals across a wide range of martian sites. Particular support for hydrothermal systems include silica (SiO2) deposits, in some cases >90% silica, in the Gusev Crater region, especially in the Columbia Hills and at Home Plate. We have developed a model...
A Comparison of seismic instrument noise coherence analysis techniques
A. T. Ringler, C. R. Hutt, J.R. Evans, L.D. Sandoval
2011, Bulletin of the Seismological Society of America (101) 558-567
The self-noise of a seismic instrument is a fundamental characteristic used to evaluate the quality of the instrument. It is important to be able to measure this self-noise robustly, to understand how differences among test configurations affect the tests, and to understand how different processing techniques and isolation methods (from...
Predominant bacteria isolated from moribund Fusconaia ebena ebonyshells experiencing die-offs in Pickwick Reservoir, Tennessee River, Alabama
C. E. Starliper, J. Powell, J.T. Garner, W. B. Schill
2011, Journal of Shellfish Research (30) 359-366
Mussel die-offs have been noted in recent years in Pickwick Reservoir, Tennessee River, Alabama. The primary affected species was Fusconaia ebena, but also affected to lesser degrees were Ellipsaria lineolata, Quadrula pustulosa, and Quadrula quadrula. These events were characterized by large numbers of empty shells—fresh-dead and live individuals that were...
Secondary chaotic terrain formation in the higher outflow channels of southern circum-Chryse, Mars
J.A.P. Rodriguez, J.S. Kargel, K. L. Tanaka, D.A. Crown, D.C. Berman, A.G. Fairen, V.R. Baker, R. Furfaro, P. Candelaria, S. Sasaki
2011, Icarus (213) 150-194
Higher outflow channel dissection in the martian region of southern circum-Chryse appears to have extended from the Late Hesperian to the Middle Amazonian Epoch. These outflow channels were excavated within the upper 1. km of the cryolithosphere, where no liquid water is expected to have existed during these geologic epochs....
Geochemistry of southern Pagan Island lavas, Mariana arc: The role of subduction zone processes
J.P. Marske, A.J. Pietruszka, F. A. Trusdell, M.O. Garcia
2011, Contributions to Mineralogy and Petrology (162) 231-252
New major and trace element abundances, and Pb, Sr, and Nd isotopic ratios of Quaternary lavas from two adjacent volcanoes (South Pagan and the Central Volcanic Region, or CVR) located on Pagan Island allow us to investigate the mantle source (i.e., slab components) and melting dynamics within the Mariana intra-oceanic...
Anthropogenic influences on shoreline and nearshore evolution in the San Francisco Bay coastal system
K.L. Dallas, P.L. Barnard
2011, Estuarine, Coastal and Shelf Science (92) 195-204
Analysis of four historical bathymetric surveys over a 132-year period has revealed significant changes to the morphology of the San Francisco Bar, an ebb-tidal delta at the mouth of San Francisco Bay estuary. From 1873 to 2005 the San Francisco Bar vertically-eroded an average of 80 cm over a 125...
CO2 plume management in saline reservoir sequestration
S.M. Frailey, R.J. Finley
2011, Conference Paper, Energy Procedia
A significant difference between injecting CO2 into saline aquifers for sequestration and injecting fluids into oil reservoirs or natural gas into aquifer storage reservoirs is the availability and use of other production and injection wells surrounding the primary injection well(s). Of major concern for CO2 sequestration using a single well...
Watershed-scale response to climate change through the twenty-first century for selected basins across the United States
Lauren E. Hay, Steven L. Markstrom, Christian D. Ward-Garrison
2011, Earth Interactions (15) 1-37
The hydrologic response of different climate-change emission scenarios for the twenty-first century were evaluated in 14 basins from different hydroclimatic regions across the United States using the Precipitation-Runoff Modeling System (PRMS), a process-based, distributed-parameter watershed model. This study involves four major steps: 1) setup and calibration of the PRMS model...
Electronic tags and genetics explore variation in migrating steelhead kelts (oncorhynchus mykiss), Ninilchik river, Alaska
J.L. Nielsen, S.M. Turner, Christian E. Zimmerman
2011, Canadian Journal of Fisheries and Aquatic Sciences (68) 1-16
Acoustic and archival tags examined freshwater and marine migrations of postspawn steelhead kelts (Oncorhynchus mykiss) in the Ninilchik River, Alaska, USA. Postspawn steelhead were captured at a weir in 2002-2005. Scale analysis indicated multiple migratory life histories and spawning behaviors. Acoustic tags were implanted in 99 kelts (2002-2003), and an...
Design of ecoregional monitoring in conservation areas of high-latitude ecosystems under contemporary climate change
Erik A. Beever, Andrea Woodward
2011, Biological Conservation (144) 1258-1269
Land ownership in Alaska includes a mosaic of federally managed units. Within its agency’s context, each unit has its own management strategy, authority, and resources of conservation concern, many of which are migratory animals. Though some units are geographically isolated, many are nevertheless linked by paths of abiotic and biotic...
