Oxygen and hydrogen isotope fractionation in serpentine-water and talc-water systems from 250 to 450 °C, 50 MPa
Peter J. Saccocia, Jeffrey S. Seewald, Wayne C. Shanks III
2009, Geochimica et Cosmochimica Acta (73) 6789-6804
Oxygen and hydrogen isotope fractionation factors in the talc–water and serpentine–water systems have been determined by laboratory experiment from 250 to 450 °C at 50 MPa using the partial exchange technique. Talc was synthesized from brucite + quartz, resulting in nearly 100% exchange during reaction at 350 and 450 °C. For serpentine, D–H exchange was...
Using time-dependent models to investigate body condition and growth rate of the giant gartersnake
P.S. Coates, G.D. Wylie, B.J. Halstead, Michael L. Casazza
2009, Journal of Zoology (279) 285-293
Identifying links between phenotypic attributes and fitness is a primary goal of reproductive ecology. Differences in within-year patterns of body condition between sexes of gartersnakes in relation to reproduction and growth are not fully understood. We conducted an 11-year field study of body condition and growth rate of the giant...
Defining winter trophic habitat of juvenile Gulf Sturgeon in the Suwannee and Apalachicola rivermouth estuaries, acoustic telemetry investigations
K. J. Sulak, M.T. Randall, R. E. Edwards, T.M. Summers, K.E. Luke, W.T. Smith, A.D. Norem, William M. Harden, R.H. Lukens, F. Parauka, S. Bolden, R. Lehnert
2009, Journal of Applied Ichthyology (25) 505-515
Three automated listening post-telemetry studies were undertaken in the Suwannee and Apalachicola estuaries to gain knowledge of habitats use by juvenile Gulf Sturgeons (Acipenser oxyrinchus desotoi) on winter feeding grounds. A simple and reliable method for external attachment of small acoustic tags to the dorsal fin base was developed using...
Constraints on the depth of generation and emplacement of a magmatic epidote-bearing quartz diorite pluton in the Coast Plutonic Complex, British Columbia
J.M. Chang, C.L. Andronicos
2009, Terra Nova (21) 480-488
Petrology and P–T estimates indicate that a magmatic epidote-bearing quartz diorite pluton from Mt. Gamsby, Coast Plutonic Complex, British Columbia, was sourced at pressures below ∼1.4 GPa and cooled nearly isobarically at ∼0.9 GPa. The P–T path indicates that the magma was within the stability field of magmatic epidote...
Sensitivity analysis, calibration, and testing of a distributed hydrological model using error‐based weighting and one objective function
L. Foglia, Mary C. Hill, Steffen W. Mehl, P. Burlando
2009, Water Resources Research (45)
We evaluate the utility of three interrelated means of using data to calibrate the fully distributed rainfall‐runoff model TOPKAPI as applied to the Maggia Valley drainage area in Switzerland. The use of error‐based weighting of observation and prior information data, local sensitivity analysis, and single‐objective function nonlinear regression provides quantitative...
Can kittiwakes smell? Experimental evidence in a larid species
S. Leclaire, Herve Mulard, R.H. Wagner, Scott A. Hatch, E. Danchin
2009, Ibis (151) 584-587
Birds have long been thought to have a poor sense of smell, although they have the proper anatomical and neurological structures for detecting olfactory cues (Roper 1999). However, in the past decade several bird species have been shown to use smell in various contexts, such as foraging (Nevitt et al. 1995), navigation (Wallraff...
Stratigraphic controls on seawater intrusion and implications for groundwater management, Dominguez Gap area of Los Angeles, California, USA
Tracy Nishikawa, Adam J. Siade, Eric G. Reichard, Daniel J. Ponti, A.G. Canales, T.A. Johnson
2009, Hydrogeology Journal (17) 1699-1725
Groundwater pumping has led to extensive water-level declines and seawater intrusion in coastal Los Angeles, California (USA). A SUTRA-based solute-transport model was developed to test the hydraulic implications of a sequence-stratigraphic model of the Dominguez Gap area and to assess the effects of water-management scenarios. The model is two-dimensional, vertical...
Widespread occurrence of intersex in black basses (Micropterus spp.) from U.S. rivers, 1995-2004
J.E. Hinck, V. S. Blazer, C. J. Schmitt, D. M. Papoulias, D. E. Tillitt
2009, Aquatic Toxicology (95) 60-70
Intersex occurrence in freshwater fishes was evaluated for nine river basins in the United States. Testicular oocytes (predominantly male testes containing female germ cells) were the most pervasive form of intersex observed, even though similar numbers of male (n = 1477) and female (n = 1633) fish were examined. Intersex...
William "Bill" Back: an incisive geochemist and a great mentor.
M.J. Baedecker, W.W. Wood
2009, Ground Water (47) 314-318
[No abstract available]...
A method for assigning species into groups based on generalized Mahalanobis distance between habitat model coefficients
C.J. Williams, P.J. Heglund
2009, Environmental and Ecological Statistics (16) 495-513
Habitat association models are commonly developed for individual animal species using generalized linear modeling methods such as logistic regression. We considered the issue of grouping species based on their habitat use so that management decisions can be based on sets of species rather than individual species. This research was motivated...
Timber harvest change in the Little North Santiam River Basin, Oregon, 1995 to 2009
Steven Sobieszczyk
2009, Report
Using available aerial photos from approximately a 15-year period, changes in timber harvest were mapped in the Little North Santiam River Basin, Oregon. Timber harvest plots as seen on digital orthophotos from 1995, 2000, 2005, and 2009 were digitized and attributed based on harvest type or purpose: clearcut, thinning, or...
SSTL UK-DMC SLIM-6 data quality assessment
G. Chander, S. Saunier, M.J. Choate, P. L. Scaramuzza
2009, IEEE Transactions on Geoscience and Remote Sensing (47) 2380-2391
Satellite data from the Surrey Satellite Technology Limited (SSTL) United Kingdom (UK) Disaster Monitoring Constellation (DMC) were assessed for geometric and radiometric quality. The UK-DMC Surrey Linear Imager 6 (SLIM-6) sensor has a 32-m spatial resolution and a ground swath width of 640 km. The UK-DMC SLIM-6 design consists of...
Thermodynamic model for uplift and deflation episodes (bradyseism) associated with magmatic-hydrothermal activity at the Campi Flegrei (Italy)
Annamaria Lima, Benedetto De Vivo, Fran J. Spera, Robert J. Bodnar, Alfonsa Milia, Concettina Nunziata, Harvey E. Belkin, Claudia Cannatelli
2009, Earth-Science Reviews (97) 44-58
Campi Flegrei (CF) is a large volcanic complex located west of the city of Naples, Italy. Repeated episodes of bradyseism (slow vertical ground movement) near the town of Pozzuoli have been documented since Roman times. Bradyseismic events are interpreted as the consequence of aqueous fluid exsolution during magma solidification on...
Combined use of frequency‐domain electromagnetic and electrical resistivity surveys to delineate the freshwater/saltwater interface near saline lakes in the Nebraska Sand Hills, Nebraska, USA
John T. Ong, Eric A. White, John W. Lane Jr., Todd Halihan, Vitaly A Zlotnik
Dwain K. Butler, editor(s)
2009, Conference Paper, Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems 2009
We investigate the use of frequency‐domain electromagnetic (FDEM) and electrical resistivity (ER) surveys for rapid and detailed characterization of the direction of lake‐aquifer fluxes and the configuration of salt plumes generated from saline lakes. This methodology was developed and applied at several lakes in the Nebraska Sand Hills, Nebraska, in...
Environmental influences on speleothem growth in southwestern Oregon during the last 380, 000 years
Vasile Ersek, Steven W. Hostetler, Hai Cheng, Peter U. Clark, Faron S. Anslow, Alan C. Mix, R. Lawrence Edwards
2009, Earth and Planetary Science Letters (279) 316-325
The growth of carbonate formations in caves (speleothems) is sensitive to changes in environmental conditions at the surface (temperature, precipitation and vegetation) and can provide useful paleoclimatic and paleoenvironmental information. We use 73 230Th dates from speleothems collected from a cave in southwestern Oregon (USA) to constrain speleothem growth for...
Land 3D-seismic data: Preprocessing quality control utilizing survey design specifications, noise properties, normal moveout, first breaks, and offset
A. Raef
2009, Conference Paper, Journal of Earth Science
The recent proliferation of the 3D reflection seismic method into the near-surface area of geophysical applications, especially in response to the emergence of the need to comprehensively characterize and monitor near-surface carbon dioxide sequestration in shallow saline aquifers around the world, justifies the emphasis on cost-effective and robust quality control...
Dike intrusions into bituminous coal, Illinois Basin: H, C, N, O isotopic responses to rapid and brief heating
A. Schimmelmann, Maria Mastalerz, L. Gao, P.E. Sauer, K. Topalov
2009, Geochimica et Cosmochimica Acta (73) 6264-6281
Unlike long-term heating in subsiding sedimentary basins, the near-instantaneous thermal maturation of sedimentary organic matter near magmatic intrusions is comparable to artificial thermal maturation in the laboratory in terms of short duration and limited extent. This study investigates chemical and H, C, N, O isotopic changes in high volatile bituminous...
Organic geochemistry of resins from modern Agathis australis and Eocene resins from New Zealand: Diagenetic and taxonomic implications
P.C. Lyons, Maria Mastalerz, W. H. Orem
2009, International Journal of Coal Geology (80) 51-62
A maturation series of resins and fossil resins from New Zealand, ranging in age from Modern to Eocene and ranging from uncoalified to high volatile C bituminous coal, were analyzed by elemental, pyrolysis-gas chromatography (Py-GC), Fourier Transform infrared (FTir), and solid-state 13C nuclear magnetic resonance (13C NMR) techniques. For comparison,...
Saturn's north polar cyclone and hexagon at depth revealed by Cassini/VIMS
K. H. Baines, T.W. Momary, L.N. Fletcher, A.P. Showman, M. Roos-Serote, R. H. Brown, B. J. Buratti, R. N. Clark, P. D. Nicholson
2009, Planetary and Space Science (57) 1671-1681
A high-speed cyclonic vortex centered on the north pole of Saturn has been revealed by the visual-infrared mapping spectrometer (VIMS) onboard the Cassini-Huygens Orbiter, thus showing that the tropospheres of both poles of Saturn are occupied by cyclonic vortices with winds exceeding 135 m/s. High-spatial-resolution (~200 km per pixel) images...
Transitioning laser ablation ICP-MS from research applications to routine trace element microanalysis: A look at quantitative trace element analyses and imaging
A.E. Koenig
2009, Microscopy and Microanalysis (15) 536-537
[No abstract available]...
Windthrow and salvage logging in an old-growth hemlock-northern hardwoods forest
K.D. Lang, L.A. Schulte, G.R. Guntenspergen
2009, Forest Ecology and Management (259) 56-64
Although the initial response to salvage (also known as, post-disturbance or sanitary) logging is known to vary among system components, little is known about longer term forest recovery. We examine forest overstory, understory, soil, and microtopographic response 25 years after a 1977 severe wind disturbance on the Flambeau River State...
Assessing rates of forest change and fragmentation in Alabama, USA, using the vegetation change tracker model
Mingshi Li, Chengquan Huang, Zhiliang Zhu, Hua Shi, Heng Lu, Shikui Peng
2009, Forest Ecology and Management (257) 1480-1488
Forest change is of great concern for land use decision makers and conservation communities. Quantitative and spatial forest change information is critical for addressing many pressing issues, including global climate change, carbon budgets, and sustainability. In this study, our analysis focuses on the differences in geospatial patterns and their changes...
Hydraulic anisotropy characterization of pneumatic-fractured sediments using azimuthal self potential gradient
D.N. Wishart, L.D. Slater, D.L. Schnell, G.C. Herman
2009, Journal of Contaminant Hydrology (103) 134-144
The pneumatic fracturing technique is used to enhance the permeability and porosity of tight unconsolidated soils (e.g. clays), thereby improving the effectiveness of remediation treatments. Azimuthal self potential gradient (ASPG) surveys were performed on a compacted, unconsolidated clay block in order to evaluate their potential to delineate contaminant migration pathways...
Use of dendrochronology and dendrochemistry in environmental forensics: Does it meet the Daubert criteria?
J.-C. Balouet, K.T. Smith, D. Vroblesky, G. Oudijk
2009, Environmental Forensics (10) 268-276
Dendrochronological methods have been in use for more than 100 years, providing us a record of climate, human activities (archaeology), floods, fire, mudslides and other geological and biological events. More recently, dendrochemisty has been used to assess the time frames of the onset and existence of environmental contamination. This article...
Pick your poison: If one pollutant doesn't take down the everglades, another might
W. H. Orem
2009, Earth (54) 54-60
[No abstract available]...
