Recovery of coded wire tags at a caspian tern colony in San Francisco Bay: A technique to evaluate impacts of avian predation on juvenile salmonids
A.F. Evans, D.D. Roby, K. Collis, B.M. Cramer, J.A. Sheggeby, L.J. Adrean, D.S. Battaglia, Donald E. Lyons
2011, North American Journal of Fisheries Management (31) 79-87
We recovered coded wire tags (CWTs) from a colony of Caspian terns Hydroprogne caspia on Brooks Island in San Francisco Bay, California, to evaluate predation on juvenile salmonids originating from the Sacramento and San Joaquin rivers. Subsamples of colony substrate representing 11.7% of the nesting habitat used by the terns...
Atacamite and paratacamite from the ultramafic-hosted Logatchev seafloor vent field (14°45′N, Mid-Atlantic Ridge)
Vesselin Dekov, Tanya Boycheva, Ulf Halenius, Sven Petersen, Kjell Billstrom, Jens Stummeyer, G. Kamenov, W. Shanks
2011, Chemical Geology (286) 169-184
Atacamite and paratacamite are ubiquitous minerals associated with Cu-rich massive sulfides at the Logatchev hydrothermal field (Mid-Atlantic Ridge). In this work we provide new details on the mineralogy and geochemistry of these basic cupric chlorides. Our data support the notion that atacamite and paratacamite formation at submarine vent fields is...
Status and distribution of the Kittlitz's Murrelet Brachyramphus brevirostris along the Alaska Peninsula and Kodiak and Aleutian Islands, Alaska
Erica N. Madison, John F. Piatt, Mayumi L. Arimitsu, Marc D. Romano, Thomas I. van Pelt, S. Kim Nelson, Jeffrey C. Williams, Anthony R. DeGange
2011, Marine Ornithology: Journal of Seabird Research and Conservation (39) 111-122
The Kittlitz's Murrelet Brachyramphus brevirostris is adapted for life in glacial-marine ecosystems, being concentrated in the belt of glaciated fjords in the northern Gulf of Alaska from Glacier Bay to Cook Inlet. Most of the remaining birds are scattered along coasts of the Alaska Peninsula and Aleutian Islands, where they...
Diel variation of selenium and arsenic in a wetland of the Great Salt Lake, Utah
G. Dicataldo, W.P. Johnson, David L. Naftz, D.F. Hayes, W.O. Moellmer, T. Miller
2011, Applied Geochemistry (26) 28-36
Diel (24-h) changes in Se and As concentrations in a freshwater wetland pond bordering the Great Salt Lake (GSL) were examined. Selenium concentrations (filtered and unfiltered) changed on a diel basis, i.e., were depleted during early morning and enriched during daytime over August 17–18. During the May 24–25, 2006 and...
Volcanism on Io: New insights from global geologic mapping
David A. Williams, Laszlo P. Keszthelyi, David A. Crown, Jessica A. Yff, Windy L. Jaeger, Paul M. Schenk, Paul E. Geissler, Tammy L. Becker
2011, Icarus (214) 91-112
We produced the first complete, 1:15 M-scale global geologic map of Jupiter’s moon Io, based on a set of monochrome and color Galileo–Voyager image mosaics produced at a spatial resolution of 1 km/pixel. The surface of Io was mapped into 19 units based on albedo, color and surface morphology, and is subdivided as follows:...
Adaptive finite volume methods with well-balanced Riemann solvers for modeling floods in rugged terrain: Application to the Malpasset dam-break flood (France, 1959)
D.L. George
2011, International Journal for Numerical Methods in Fluids (66) 1000-1018
The simulation of advancing flood waves over rugged topography, by solving the shallow-water equations with well-balanced high-resolution finite volume methods and block-structured dynamic adaptive mesh refinement (AMR), is described and validated in this paper. The efficiency of block-structured AMR makes large-scale problems tractable, and allows the use of accurate and...
The academic road less traveled
D.A. James
2011, Fisheries (36) 351-352
[No abstract available]...
Final report on the Seventh International Comparison of Absolute Gravimeters (ICAG 2005)
Z. Jiang, O. Francis, L. Vitushkin, V. Palinkas, A. Germak, M. Becker, G. D’Agostino, M. Amalvict, R. Bayer, M. Bilker-Koivula, S. Desogus, J. Faller, R. Falk, J. Hinderer, C. Gagnon, T. Jakob, E. Kalish, J. Kostelecky, C. Lee, J. Liard, Y. Lokshyn, B. Luck, J. Makinen, S. Mizushima, Moigne N. Le, C. Origlia, E.R. Pujol, P. Richard, L. Robertsson, D. Ruess, D. Schmerge, Y. Stus, S. Svitlov, S. Thies, C. Ullrich, M. Van Camp, A. Vitushkin, W. Ji, H. Wilmes
2011, Metrologia (48) 246-260
The Bureau International des Poids et Mesures (BIPM), Sevres, France, hosted the 7th International Comparison of Absolute Gravimeters (ICAG) and the associated Relative Gravity Campaign (RGC) from August to September 2005.;ICAG 2005 was prepared and performed as a metrological pilot study, which aimed:;(1) To determine the gravity comparison reference values;;(2)...
Change of impervious surface area between 2001 and 2006 in the conterminous United States
George Z. Xian, Collin G. Homer, Jon Dewitz, Joyce Fry, N. Hossain, J. Wickham
2011, Photogrammetric Engineering and Remote Sensing (77) 758-762
No abstract available....
National intergrated drought information system
R. Pulwarty, J. Verdin, L. Darby, C. McNutt, R. Webb
2011, Conference Paper, 2011 GEOSS Workshop XL - Managing Drought through Earth Observation, GEOSS 2011
[No abstract available]...
Simulating adsorption of U(VI) under transient groundwater flow and hydrochemistry: Physical versus chemical nonequilibrium model
J. Greskowiak, M.B. Hay, H. Prommer, C. Liu, V.E.A. Post, R. Ma, J.A. Davis, C. Zheng, J.M. Zachara
2011, Water Resources Research (47)
Coupled intragrain diffusional mass transfer and nonlinear surface complexation processes play an important role in the transport behavior of U(VI) in contaminated aquifers. Two alternative model approaches for simulating these coupled processes were analyzed and compared: (1) the physical nonequilibrium approach that explicitly accounts for aqueous speciation and instantaneous surface...
Growth rate and age distribution of deep-sea black corals in the Gulf of Mexico
N.G. Prouty, E.B. Roark, N.A. Buster, Steve W. Ross
2011, Marine Ecology Progress Series (423) 101-115
Black corals (order Antipatharia) are important long-lived, habitat-forming, sessile, benthic suspension feeders that are found in all oceans and are usually found in water depths greater than 30 m. Deep-water black corals are some of the slowest-growing, longest-lived deep-sea corals known. Previous age dating of a limited number of black...
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...
Storms, floods, and the science of atmospheric rivers
F.M. Ralph, M. D. Dettinger
2011, Eos, Transactions, American Geophysical Union (92) 265-266
Imagine a stream of water thousands of kilometers long and as wide as the distance between New York City and Washington, D. C., flowing toward you at 30 miles per hour. No, this is not some hypothetical physics problemit is a real river, carrying more water than 7-15 Mississippi Rivers...
The geochemistry and petrogenesis of the Paleoproterozoic Green Mountain arc: A composite(?), bimodal, oceanic, fringing arc
D.S. Jones, C. G. Barnes, Wayne R. Premo, A.W. Snoke
2011, Precambrian Research (185) 231-249
The inferred subduction affinity of the ∼1780-Ma Green Mountain arc, a dominantly bimodal igneous terrane (together with immature marine and volcaniclastic sedimentary rocks) accreted to the southern margin of the Wyoming province, is integral to arc-accretion models of the Paleoproterozoic growth of southern Laurentia. Conversely, the dominantly bimodal nature...
Thermal erosion of a permafrost coastline: Improving process-based models using time-lapse photography
C. Wobus, R. Anderson, I. Overeem, N. Matell, G. Clow, F. Urban
2011, Arctic, Antarctic, and Alpine Research (43) 474-484
Coastal erosion rates locally exceeding 30 m y-1 have been documented along Alaska's Beaufort Sea coastline, and a number of studies suggest that these erosion rates have accelerated as a result of climate change. However, a lack of direct observational evidence has limited our progress in quantifying the specific processes...
Regional long-term production modeling from a single well test, Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope
B.J. Anderson, M. Kurihara, M.D. White, G. J. Moridis, S.J. Wilson, M. Pooladi-Darvish, M. Gaddipati, Y. Masuda, Timothy S. Collett, R.B. Hunter, H. Narita, K. Rose, R. Boswell
2011, Marine and Petroleum Geology (28) 493-501
Following the results from the open-hole formation pressure response test in the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well (Mount Elbert well) using Schlumberger's Modular Dynamics Formation Tester (MDT) wireline tool, the International Methane Hydrate Reservoir Simulator Code Comparison project performed long-term reservoir simulations on three different model reservoirs....
Wave constraints for Titan's Jingpo Lacus and Kraken Mare from VIMS specular reflection lightcurves
J. W. Barnes, J.M. Soderblom, R. H. Brown, L.A. Soderblom, K. Stephan, R. Jaumann, Stéphane Le Mouélic, S. Rodriguez, Christophe Sotin, B. J. Buratti, K. H. Baines, R. N. Clark, P. D. Nicholson
2011, Icarus (211) 722-731
Stephan et al. (Stephan, K. et al. [2010]. Geophys. Res. Lett. 37, 7104-+.) first saw the glint of sunlight specularly reflected off of Titan's lakes. We develop a quantitative model for analyzing the photometric lightcurve generated during a flyby in which the specularly reflected light flux depends on the fraction...
Magmatic-vapor expansion and the formation of high-sulfidation gold deposits: Structural controls on hydrothermal alteration and ore mineralization
Byron R. Berger, Richard W. Henley
2011, Ore Geology Reviews (39) 75-90
High-sulfidation copper–gold lode deposits such as Chinkuashih, Taiwan, Lepanto, Philippines, and Goldfield, Nevada, formed within 1500 m of the paleosurface in volcanic terranes. All underwent an early stage of extensive advanced argillic silica–alunite alteration followed by an abrupt change to spatially much more restricted stages of fracture-controlled sulfide–sulfosalt mineral assemblages...
Hierarchical modeling of an invasive spread: The eurasian collared-dove streptopelia decaocto in the United States
F. Bled, J. Andrew Royle, E. Cam
2011, Ecological Applications (21) 290-302
Invasive species are regularly claimed as the second threat to biodiversity. To apply a relevant response to the potential consequences associated with invasions (e.g., emphasize management efforts to prevent new colonization or to eradicate the species in places where it has already settled), it is essential to understand invasion mechanisms...
Seismic and geodetic signatures of fault slip at the Slumgullion Landslide Natural Laboratory
J. Gomberg, W. Schulz, P. Bodin, J. Kean
2011, Journal of Geophysical Research B: Solid Earth (116)
We tested the hypothesis that the Slumgullion landslide is a useful natural laboratory for observing fault slip, specifically that slip along its basal surface and side-bounding strike-slip faults occurs with comparable richness of aseismic and seismic modes as along crustal- and plate-scale boundaries. Our study provides new constraints on models...
Changes in agricultural cropland areas between a water-surplus year and a water-deficit year impacting food security, determined using MODIS 250 m time-series data and spectral matching techniques, in the Krishna river basin (India)
Murali Krishna Gumma, Prasad S. Thenkabail, I.V. Muralikrishna, Naga Manohar Velpuri, P.T. Gangadhararao, V. Dheeravath, C.M. Biradar, S.A. Nalan, A. Gaur
2011, International Journal of Remote Sensing (32) 3495-3520
The objective of this study was to investigate the changes in cropland areas as a result of water availability using Moderate Resolution Imaging Spectroradiometer (MODIS) 250 m time-series data and spectral matching techniques (SMTs). The study was conducted in the Krishna River basin in India, a very large river basin...
Using normalized difference vegetation index to estimate carbon fluxes from small rotationally grazed pastures
R.H. Skinner, B.K. Wylie, T.G. Gilmanov
2011, Agronomy Journal (103) 972-979
Satellite-based normalized difference vegetation index (NDVI) data have been extensively used for estimating gross primary productivity (GPP) and yield of grazing lands throughout the world. However, the usefulness of satellite-based images for monitoring rotationally-grazed pastures in the northeastern United States might be limited because paddock size is often smaller than...
Early in-flight detection of SO2 via Differential Optical Absorption Spectroscopy: A feasible aviation safety measure to prevent potential encounters with volcanic plumes
L. Vogel, B. Galle, C. Kern, Granados H. Delgado, V. Conde, P. Norman, S. Arellano, O. Landgren, P. Lubcke, Nieves J.M. Alvarez, Gonzales L. Cardenas, U. Platt
2011, Atmospheric Measurement Techniques Discussions (4) 2827-2881
Volcanic ash constitutes a risk to aviation, mainly due to its ability to cause jet engines to fail. Other risks include the possibility of abrasion of windshields and potentially serious damage to avionic systems. These hazards have been widely recognized 5 since the early 1980s, when volcanic ash provoked several...
Columbus crater and other possible groundwater-fed paleolakes of Terra Sirenum, Mars
J.J. Wray, R.E. Milliken, Colin M. Dundas, Gregg A. Swayze, J. C. Andrews-Hanna, A.M. Baldridge, M. Chojnacki, J.L. Bishop, B.L. Ehlmann, S.L. Murchie, Roger N. Clark, F.P. Seelos, L.L. Tornabene, S. W. Squyres
2011, Journal of Geophysical Research E: Planets (116)
Columbus crater in the Terra Sirenum region of the Martian southern highlands contains light‐toned layered deposits with interbedded sulfate and phyllosilicate minerals, a rare occurrence on Mars. Here we investigate in detail the morphology, thermophysical properties, mineralogy, and stratigraphy of these deposits; explore their regional context; and interpret the crater's...
