Fractionation of Cu and Zn isotopes during adsorption onto amorphous Fe(III) oxyhydroxide: Experimental mixing of acid rock drainage and ambient river water
Laurie S. Balistrieri, D.M. Borrok, R. B. Wanty, W.I. Ridley
2008, Geochimica et Cosmochimica Acta (72) 311-328
Fractionation of Cu and Zn isotopes during adsorption onto amorphous ferric oxyhydroxide is examined in experimental mixtures of metal-rich acid rock drainage and relatively pure river water and during batch adsorption experiments using synthetic ferrihydrite. A diverse set of Cu- and Zn-bearing...
Validation of the ASTER instrument level 1A scene geometry
H. H. Kieffer, K. F. Mullins, D. J. MacKinnon
2008, Photogrammetric Engineering and Remote Sensing (74) 289-301
An independent assessment of the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument geometry was undertaken by the U.S. ASTER Team, to confirm the geometric correction parameters developed and applied to Level 1A (radiometrically and geometrically raw with correction parameters appended) ASTER data. The goal was to evaluate the...
Meteorological characteristics and overland precipitation impacts of atmospheric rivers affecting the West coast of North America based on eight years of SSM/I satellite observations
P.J. Neiman, F.M. Ralph, G.A. Wick, J.D. Lundquist, M. D. Dettinger
2008, Journal of Hydrometeorology (9) 22-47
The pre-cold-frontal low-level jet within oceanic extratropical cyclones represents the lower-tropospheric component of a deeper corridor of concentrated water vapor transport in the cyclone warm sector. These corridors are referred to as atmospheric rivers (ARs) because they are narrow relative to their length scale and are responsible for most of...
Relationships between microbial communities and environmental parameters at sites impacted by mining of volcanogenic massive sulfide deposits, Prince William Sound, Alaska
A. L. Foster, L. Munk, R.A. Koski, Wayne C. Shanks III, L.L. Stillings
2008, Applied Geochemistry (23) 279-307
The relations among geochemical parameters and sediment microbial communities were examined at three shoreline sites in the Prince William Sound, Alaska, which display varying degrees of impact by acid-rock drainage (ARD) associated with historic mining of volcanogenic massive sulfide deposits. Microbial communities were examined using total fatty acid methyl esters...
Influence of dams on river-floodplain dynamics in the Elwha River, Washington
K.K. Kloehn, T.J. Beechie, S.A. Morley, H.J. Coe, J.J. Duda
2008, Northwest Science (82) 224-235
The Elwha dam removal project presents an ideal opportunity to study how historic reduction and subsequent restoration of sediment supply alter river-floodplain dynamics in a large, forested river floodplain. We used remote sensing and onsite data collection to establish a historical record of floodplain dynamics and a baseline of current...
Testing small-aperture array analysis on well-located earthquakes, and application to the location of deep tremor
Rocca M. La, D. Galluzzo, S. Malone, W. McCausland, G. Saccorotti, Pezzo E. Del
2008, Bulletin of the Seismological Society of America (98) 620-635
We have here analyzed local and regional earthquakes using array techniques with the double aim of quantifying the errors associated with the estimation of propagation parameters of seismic signals and testing the suitability of a probabilistic location method for the analysis of nonimpulsive signals. We have applied the zero-lag cross-correlation...
Three-dimensional flow in the storative semiconfining layers of a leaky aquifer
N. Sepulveda
2008, Ground Water (46) 144-155
An analytical solution for three-dimensional (3D) flow in the storative semiconfining layers of a leaky aquifer fully penetrated by a production well is developed in this article to provide a method from which accurate hydraulic parameters in the semiconfining layers can be derived from aquifer test data. The analysis of...
Western juniper and ponderosa pine ecotonal climate-growth relationships across landscape gradients in southern Oregon
K.C. Knutson, D.A. Pyke
2008, Canadian Journal of Forest Research (38) 3021-3032
Forecasts of climate change for the Pacific northwestern United States predict warmer temperatures, increased winter precipitation, and drier summers. Prediction of forest growth responses to these climate fluctuations requires identification of climatic variables limiting tree growth, particularly at limits of free species distributions. We addressed this problem at the pine-woodland...
Demography and movement in a relocated population of Oregon Spotted Frogs (Rana pretiosa): Influence of season and gender
N.D. Chelgren, C.A. Pearl, M.J. Adams, J. Bowerman
2008, Copeia 742-751
We used five years of recapture data and Bayesian estimation to assess seasonal survival, movement, and growth of Oregon Spotted Frogs (Rana pretiosa) relocated into created ponds at Dilman Meadow in Oregon, USA. We evaluate hypotheses specific to the relocation and elucidate aspects of R. pretiosa life history that are...
Ontology-based geospatial data query and integration
T. Zhao, C. Zhang, M. Wei, Z.-R. Peng
2008, Conference Paper
Geospatial data sharing is an increasingly important subject as large amount of data is produced by a variety of sources, stored in incompatible formats, and accessible through different GIS applications. Past efforts to enable sharing have produced standardized data format such as GML and data access protocols such as Web...
Utilizing geochemical, hydrologic, and boron isotopic data to assess the success of a salinity and selenium remediation project, Upper Colorado River Basin, Utah
D. L. Naftz, T.D. Bullen, Bernard J. Stolp, C.D. Wilkowske
2008, Science of the Total Environment (392) 1-11
Stream discharge and geochemical data were collected at two sites along lower Ashley Creek, Utah, from 1999 to 2003, to assess the success of a site specific salinity and Se remediation project. The remediation project involved the replacement of a leaking sewage lagoon system that was interacting with Mancos Shale...
Collaboration tools and techniques for large model datasets
R. P. Signell, S. Carniel, J. Chiggiato, I. Janekovic, J. Pullen, C. R. Sherwood
2008, Journal of Marine Systems (69) 154-161
In MREA and many other marine applications, it is common to have multiple models running with different grids, run by different institutions. Techniques and tools are described for low-bandwidth delivery of data from large multidimensional datasets, such as those from meteorological and oceanographic models, directly into generic analysis and visualization...
Evaluation of MODIS NDVI and NDWI for vegetation drought monitoring using Oklahoma Mesonet soil moisture data
Yingxin Gu, E. Hunt, B. Wardlow, J.B. Basara, Jesslyn F. Brown, J. P. Verdin
2008, Geophysical Research Letters (35) 1-5
The evaluation of the relationship between satellite-derived vegetation indices (normalized difference vegetation index and normalized difference water index) and soil moisture improves our understanding of how these indices respond to soil moisture fluctuations. Soil moisture deficits are ultimately tied to drought stress on plants. The diverse terrain and climate of...
Estimating watershed level nonagricultural pesticide use from golf courses using geospatial methods
G.A. Fox, G.P. Thelin, G.J. Sabbagh, J.W. Fuchs, I.D. Kelly
2008, Journal of the American Water Resources Association (44) 1363-1372
Limited information exists on pesticide use for nonagricultural purposes, making it difficult to estimate pesticide loadings from nonagricultural sources to surface water and to conduct environmental risk assessments. A method was developed to estimate the amount of pesticide use on recreational turf grasses, specifically golf course turf grasses, for watersheds...
Micropaleontologic record of late Pliocene and Quaternary paleoenvironments in the northern Albemarle Embayment, North Carolina, U.S.A.
S.J. Culver, K.M. Farrell, D. J. Mallinson, B. P. Horton, Debra A. Willard, E.R. Thieler, S.R. Riggs, S.W. Snyder, J.F. Wehmiller, C.E. Bernhardt, C. Hillier
2008, Palaeogeography, Palaeoclimatology, Palaeoecology (264) 54-77
Micropaleontological data provide a strong actualistic basis for detailed interpretations of Quaternary paleoenvironmental change. The 90 m-thick Quaternary record of the Albemarle Embayment in the mid-Atlantic coastal plain of the USA provides an excellent opportunity to use such an approach in a region where the details of Quaternary environmental change are...
An overview of methods for developing bioenergetic and life history models for rare and endangered species
J.H. Petersen, D.L. DeAngelis, C.P. Paukert
2008, Transactions of the American Fisheries Society (137) 244-253
Many fish species are at risk to some degree, and conservation efforts are planned or underway to preserve sensitive populations. For many imperiled species, models could serve as useful tools for researchers and managers as they seek to understand individual growth, quantify predator-prey dynamics, and identify critical sources of mortality....
Diagnosis of an intense atmospheric river impacting the pacific northwest: Storm summary and offshore vertical structure observed with COSMIC satellite retrievals
P.J. Neiman, F.M. Ralph, G.A. Wick, Y.-H. Kuo, T.-K. Wee, Z. Ma, G.H. Taylor, M. D. Dettinger
2008, Monthly Weather Review (136) 4398-4420
This study uses the new satellite-based Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) mission to retrieve tropospheric profiles of temperature and moisture over the data-sparse eastern Pacific Ocean. The COSMIC retrievals, which employ a global positioning system radio occultation technique combined with "first-guess" information from numerical weather prediction...
Estimating fish body condition with quantile regression
B.S. Cade, J.W. Terrell, M.T. Porath
2008, North American Journal of Fisheries Management (28) 349-359
We used quantile regression to compare the body condition of walleye Sander vitreus and white bass Morone chrysops before (1980-1988) and after (1989-2004) the establishment of alewives Alosa pseudoharengus in Lake McConaughy, Nebraska. Higher quantiles (percentiles = 100% x quantiles [0, 1]) of weight (W) at the same total length...
Cancer mortality in a Chinese population exposed to hexavalent chromium in drinking water
J.J. Beaumont, R.M. Sedman, S.D. Reynolds, C.D. Sherman, L.-H. Li, R.A. Howd, M.S. Sandy, L. Zeise, G.V. Alexeeff
2008, Epidemiology (19) 12-23
BACKGROUND: In 1987, investigators in Liaoning Province, China, reported that mortality rates for all cancer, stomach cancer, and lung cancer in 1970-1978 were higher in villages with hexavalent chromium (Cr)-contaminated drinking water than in the general population. The investigators reported rates, but did not report statistical measures of association or...
Estimation of perennial vegetation cover distribution in the Mojave Desert using MODIS-EVI data
C.S.A. Wallace, R. H. Webb, K.A. Thomas
2008, GIScience and Remote Sensing (45) 167-187
This paper details a method to create regional models of perennial vegetation cover using pre-existing field data and satellite imagery. Total cover of perennial vegetation is an important ecological attribute of desert ecosystems, including the Mojave Desert, USA, an area of 125,000 km2. Moderate-Resolution Imaging Spectroradiometer Enhanced Vegetation Index (MODIS-EVI)...
Cosmogenic exposure-age chronologies of Pinedale and Bull Lake glaciations in greater Yellowstone and the Teton Range, USA
J. M. Licciardi, K. L. Pierce
2008, Quaternary Science Reviews (27) 814-831
We have obtained 69 new cosmogenic 10Be surface exposure ages from boulders on moraines deposited by glaciers of the greater Yellowstone glacial system and Teton Range during the middle and late Pleistocene. These new data, combined with 43 previously obtained 3He and 10Be ages from deposits of the northern Yellowstone...
Stream denitrification across biomes and its response to anthropogenic nitrate loading
P. J. Mulholland, A. M. Helton, G. C. Poole, R. O. Hall Jr., S. K. Hamilton, B. J. Peterson, J. L. Tank, L. R. Ashkenas, L. W. Cooper, Clifford N. Dahm, W. K. Dodds, S.E.G. Findlay, S.V. Gregory, N. B. Grimm, S. L. Johnson, W. H. McDowell, J.L. Meyer, H. M. Valett, J.R. Webster, C. P. Arango, J. J. Beaulieu, M. J. Bernot, A. J. Burgin, C. L. Crenshaw, L. T. Johnson, B.R. Niederlehner, J. M. O’Brien, J. D. Potter, R.W. Sheibley, D. J. Sobota, S. M. Thomas
2008, Nature (452) 202-205
Anthropogenic addition of bioavailable nitrogen to the biosphere is increasing and terrestrial ecosystems are becoming increasingly nitrogen-saturated, causing more bioavailable nitrogen to enter groundwater and surface waters. Large-scale nitrogen budgets show that an average of about 20-25 per cent of the nitrogen added to the biosphere is exported from rivers...
Mapping vegetation communities using statistical data fusion in the Ozark National Scenic Riverways, Missouri, USA
R.A. Chastain Jr., M.A. Struckhoff, H.S. He, D.R. Larsen
2008, Photogrammetric Engineering and Remote Sensing (74) 247-264
A vegetation community map was produced for the Ozark National Scenic Riverways consistent with the association level of the National Vegetation Classification System. Vegetation communities were differentiated using a large array of variables derived from remote sensing and topographic data, which were fused into independent mathematical functions using a discriminant...
Reconstructed historical land cover and biophysical parameters for studies of land-atmosphere interactions within the eastern United States
Louis T. Steyaert, R.G. Knox
2008, Journal of Geophysical Research D: Atmospheres (113) 1-27
Over the past 350 years, the eastern half of the United States experienced extensive land cover changes. These began with land clearing in the 1600s, continued with widespread deforestation, wetland drainage, and intensive land use by 1920, and then evolved to the present-day landscape of forest regrowth, intensive agriculture, urban...
Devonian brachiopods of southwesternmost laurentia: Biogeographic affinities and tectonic significance
A. J. Boucot, Forrest G. Poole, R. Amaya-Martinez, A. G. Harris, Charles Sandberg, William R. Page
2008, Special Paper of the Geological Society of America 77-97
Three brachiopod faunas discussed herein record different depositional and tectonic settings along the southwestern margin of Laurentia (North America) during Devonian time. Depositional settings include inner continental shelf (Cerros de Los Murcielagos), medial continental shelf (Rancho Placeritos), and offshelf continental rise (Rancho Los Chinos). Ages of Devonian brachiopod faunas include...
