Two-species occupancy models: A new parameterization applied to co-occurrence of secretive rails
O.M.W. Richmond, J.E. Hines, S. R. Beissinger
2010, Ecological Applications (20) 2036-2046
Two-species occupancy models that account for false absences provide a robust method for testing for evidence of competitive exclusion, but previous model parameteriza-tions were inadequate for incorporating covariates. We present a new parameterization that is stable when covariates are included: the conditional two-species occupancy model, which can be used to...
Time-dependent seismic tomography
B.R. Julian, G.R. Foulger
2010, Geophysical Journal International (182) 1327-1338
Of methods for measuring temporal changes in seismic-wave speeds in the Earth, seismic tomography is among those that offer the highest spatial resolution. 3-D tomographic methods are commonly applied in this context by inverting seismic wave arrival time data sets from different epochs independently and assuming that differences in the...
Geochronology and paleoclimatic implications of the last deglaciation of the Mauna Kea Ice Cap, Hawaii
Faron S. Anslow, P.U. Clark, M.D. Kurz, S. W. Hostetler
2010, Earth and Planetary Science Letters (297) 234-248
We present new 3He surface exposure ages on moraines and bedrock near the summit of Mauna Kea, Hawaii, which refine the age of the Mauna Kea Ice Cap during the Local Last Glacial Maximum (LLGM) and identify a subsequent fluctuation of the ice margin. The 3He ages, when combined with...
Impacts of precipitation seasonality and ecosystem types on evapotranspiration in the Yukon River Basin, Alaska
W. Yuan, S. Liu, H. Liu, J. T. Randerson, G. Yu, L.L. Tieszen
2010, Water Resources Research (46) 1-16
Evapotranspiration (ET) is the largest component of water loss from terrestrial ecosystems; however, large uncertainties exist when estimating the temporal and spatial variations of ET because of concurrent shifts in the magnitude and seasonal distribution of precipitation as well as differences in the response of ecosystem ET to environmental variabilities....
Fuel deposition rates of montane and subalpine conifers in the central Sierra Nevada, California, USA
J. W. van Wagtendonk, P.E. Moore
2010, Forest Ecology and Management (259) 2122-2132
Fire managers and researchers need information on fuel deposition rates to estimate future changes in fuel bed characteristics, determine when forests transition to another fire behavior fuel model, estimate future changes in fuel bed characteristics, and parameterize and validate ecosystem process models. This information is lacking for many ecosystems including...
Coastal loading and transport of Escherichia coli at an embayed beach in Lake Michigan
Z. Ge, M.B. Nevers, D.J. Schwab, R.L. Whitman
2010, Environmental Science & Technology (44) 6731-6737
A Chicago beach in southwest Lake Michigan was revisited to determine the influence of nearshore hydrodynamic effects on the variability of Escherichia coli (E. coli) concentration in both knee-deep and offshore waters. Explanatory variables that could be used for identifying potential bacteria loading mechanisms, such as bed shear stress due...
Geoinformatics: Transforming data to knowledge for geosciences
A.K. Sinha, Z. Malik, A. Rezgui, C. G. Barnes, K. Lin, G. Heiken, W.A. Thomas, L.C. Gundersen, R. Raskin, I. Jackson, P. Fox, D. McGuinness, D. Seber, H. Zimmerman
2010, GSA Today (20) 4-10
An integrative view of Earth as a system, based on multidisciplinary data, has become one of the most compelling reasons for research and education in the geosciences. It is now necessary to establish a modern infrastructure that can support the transformation of data to knowledge. Such an information infrastructure for...
Use of land surface remotely sensed satellite and airborne data for environmental exposure assessment in cancer research
S.K. Maxwell, J.R. Meliker, P. Goovaerts
2010, Journal of Exposure Science and Environmental Epidemiology (20) 176-185
In recent years, geographic information systems (GIS) have increasingly been used for reconstructing individual-level exposures to environmental contaminants in epidemiological research. Remotely sensed data can be useful in creating space-time models of environmental measures. The primary advantage of using remotely sensed data is that it allows for study at the...
Mapping irrigated lands at 250-m scale by merging MODIS data and National Agricultural Statistics
Md Shahriar Pervez, Jesslyn F. Brown
2010, Remote Sensing (2) 2388-2412
Accurate geospatial information on the extent of irrigated land improves our understanding of agricultural water use, local land surface processes, conservation or depletion of water resources, and components of the hydrologic budget. We have developed a method in a geospatial modeling framework that assimilates irrigation statistics with remotely sensed parameters...
Serving ocean model data on the cloud
Michael Meisinger, Claudiu Farcas, Emilia Farcas, Charles Alexander, Matthew Arrott, Jeff de La Beaujardiere, Paul Hubbard, Roy Mendelssohn, Richard P. Signell
2010, Conference Paper, OCEANS 2009, MTS/IEEE Biloxi - Marine Technology for Our Future: Global and Local Challenges
The NOAA-led Integrated Ocean Observing System (IOOS) and the NSF-funded Ocean Observatories Initiative Cyberinfrastructure Project (OOI-CI) are collaborating on a prototype data delivery system for numerical model output and other gridded data using cloud computing. The strategy is to take an existing distributed system for delivering gridded data and redeploy...
Coupled hydrology and biogeochemistry of Paleocene–Eocene coal beds, northern Gulf of Mexico
Jennifer C. McIntosh, Peter D. Warwick, Anna M. Martini, Stephen G. Osborn
2010, GSA Bulletin (122) 1248-1264
Thirty-six formation waters, gas, and microbial samples were collected and analyzed from natural gas and oil wells producing from the Paleocene to Eocene Wilcox Group coal beds and adjacent sandstones in north-central Louisiana, USA, to investigate the role hydrology plays on the generation and distribution of microbial methane. Major ion...
Modeling methods
Richard W. Healy
2010, Book chapter, Estimating groundwater recharge
Simulation models are widely used in all types of hydrologic studies, and many of these models can be used to estimate recharge. Models can provide important insight into the functioning of hydrologic systems by identifying factors that influence recharge. The predictive capability of models can be used to evaluate how...
Distribution and tsunamigenic potential of submarine landslides in the Gulf of Mexico
Jason D. Chaytor, David C. Twichell, Patrick Lynett, Eric L. Geist
2010, Book chapter, Submarine mass movements and their consequences. Advances in natural and technological hazards research, vol 28
The Gulf of Mexico (GOM) is a geologically diverse ocean basin that includes three distinct geologic provinces: a carbonate province, a salt province, and canyon to deep-sea fan province, all of which contain evidence of submarine mass movements. The threat of submarine landslides in the GOM as a generator of...
Using occupancy models to understand the distribution of an amphibian pathogen, Batrachochytrium dendrobatidis
M. J. Adams, Nathan Chelgren, David M. Reinitz, Rebecca A. Cole, L.J. Rachowicz, Stephanie Galvan, Brome McCreary, Christopher A. Pearl, Larissa L. Bailey, Jamie B. Bettaso, Evelyn L. Bull, Matthias Leu
2010, Ecological Applications (20) 289-302
Batrachochytrium dendrobatidis is a fungal pathogen that is receiving attention around the world for its role in amphibian declines. Study of its occurrence patterns is hampered by false negatives: the failure to detect the pathogen when it is present. Occupancy models are a useful but currently underutilized tool for analyzing...
Intensity, magnitude, location and attenuation in India for felt earthquakes since 1762
Walter Szeliga, Susan Hough, Stacey Martin, Roger G. Bilham
2010, Bulletin of the Seismological Society of America (100) 570-584
A comprehensive, consistently interpreted new catalog of felt intensities for India (Martin and Szeliga, 2010, this issue) includes intensities for 570 earthquakes; instrumental magnitudes and locations are available for 100 of these events. We use the intensity values for 29 of the instrumentally recorded events to develop new intensity versus...
NetCDF-CF-OPeNDAP: Standards for ocean data interoperability and object lessons for community data standards processes
Steven C. Hankin, Jon D. Blower, Thierry Carval, Kenneth S. Casey, Craig Donlon, Olivier Lauret, Thomas Loubrieu, Ashwanth Srinivasan, Joaquin Trinanes, Oystein Godoy, Roy Mendelssohn, Richard P. Signell, Jeff de La Beaujardiere, Peter Cornillon, Frederique Blanc, Russ Rew, Jack Harlan
Julie Hall, D.E. Harrison, Detlef Stammer, editor(s)
2010, Conference Paper, Proceedings of OceanObs'09: Sustained Ocean Observations and Information for Society
It is generally recognized that meeting society's emerging environmental science and management needs will require the marine data community to provide simpler, more effective and more interoperable access to its data. There is broad agreement, as well, that data standards are the bedrock upon which interoperability will be built. The...
Predictive modeling of transient storage and nutrient uptake: Implications for stream restoration
Ben L. O’Connor, Miki Hondzo, Judson W. Harvey
2010, Journal of Hydraulic Engineering (136) 1018-1032
This study examined two key aspects of reactive transport modeling for stream restoration purposes: the accuracy of the nutrient spiraling and transient storage models for quantifying reach-scale nutrient uptake, and the ability to quantify transport parameters using measurements and scaling techniques in order to improve upon traditional conservative tracer fitting...
Use of induced polarization to characterize the hydrogeologic framework of the zone of surface‐water/groundwater exchange at the Hanford 300 Area, WA
Lee Slater, Dimitrios Ntarlagiannis, Frederick D. Day-Lewis, Kisa Mwakanyamale, John W. Lane Jr., Andy Ward, Roelof J. Versteeg
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
An extensive continuous waterborne electrical imaging (CWEI) survey was conducted along the Columbia River corridor adjacent to the U.S. Department of Energy (DOE) Hanford 300 Area, WA, in order to improve the conceptual model for exchange between surface water and U‐contaminated groundwater. The primary objective was to determine spatial variability...
Transient electromagnetic mapping of clay units in the San Luis Valley, Colorado
David V. Fitterman, V. J. S. Grauch
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
Transient electromagnetic soundings were used to obtain information needed to refine hydrologic models of the San Luis Valley, Colorado. The soundings were able to map an aquitard called the blue clay that separates an unconfined surface aquifer from a deeper confined aquifer. The blue clay forms a conductor with an average...
Are modern geothermal waters in northwest Nevada forming epithermal gold deposits?
George N. Breit, Andrew G. Hunt, Ruth E. Wolf, Alan E. Koenig, Richard Fifarek, Mark F. Coolbaugh
2010, Conference Paper, Geological Society of Nevada Symposium, Great Basin Evolution and Metallogeny 2010
Hydrothermal systems currently are active near some gold deposits in northwestern Nevada. Possible links of these modern systems to gold mineralization were evaluated by chemically and isotopically analyzing water samples from the Brady, Dixie Valley, Humboldt House, San Emidio-Empire, Soda Lake, and Wabuska geothermal areas. In addition, quartz veins from...
Controls on biochemical oxygen demand in the upper Klamath River, Oregon
Annett B. Sullivan, Dean M. Snyder, Stewart A. Rounds
2010, Chemical Geology (269) 12-21
A series of 30-day biochemical oxygen demand (BOD) experiments were conducted on water column samples from a reach of the upper Klamath River that experiences hypoxia and anoxia in summer. Samples were incubated with added nitrification inhibitor to measure carbonaceous BOD (CBOD), untreated to measure total BOD, which included demand...
Avian malaria Plasmodium relictum in native Hawaiian forest birds: epizootiology and demographic impacts on ‵apapane Himatione sanguinea
Carter T. Atkinson, Michael D. Samuel
2010, Journal of Avian Biology (41) 357-366
The role of introduced avian malaria Plasmodium relictum in the decline and extinction of native Hawaiian forest birds has become a classic example of the potential effect of invasive diseases on biological diversity of naïve populations. However, empirical evidence describing the impact of avian malaria on fitness of Hawai‵i's endemic forest birds...
The tectono-stratigraphic framework and evolution of southwestern Maine and southeastern New Hampshire
Arthur M. Hussey II., Wallace A. Bothner, John N. Alienikoff
Richard P. Tollo, editor(s)
2010, Book chapter, From Rodinia to Pangea: the lithotectonic record of the Appalachian Region
Five belts of metamorphosed sedimentary and volcanic rocks underlie southwestern Maine and southeastern New Hampshire: Middle Ordovician Falmouth-Brunswick sequence; Middle and Late Ordovician Casco Bay Group, and Late Ordovician to Early Silurian rocks of the Merribuckfred Basin; Late Ordovician to Early Silurian rocks of the East Harpswell Group; Silurian to...
Growth, carbon-isotope discrimination, and drought-associated mortality across a Pinus ponderosa elevational transect
N.G. McDowell, Craig D. Allen, L. Marshall
2010, Global Change Biology (16) 399-415
Drought- and insect-associated tree mortality at low-elevation ecotones is a widespread phenomenon but the underlying mechanisms are uncertain. Enhanced growth sensitivity to climate is widely observed among trees that die, indicating that a predisposing physiological mechanism(s) underlies tree mortality. We tested three, linked hypotheses regarding mortality using a ponderosa pine...
Maintenance of Eastern hemlock forests: Factors associated with hemlock vulnerability to hemlock woolly adelgid
Mary Ann Fajvan, Petra Bohall Wood
2010, Conference Paper, Proceedings from the Conference on the Ecology and Management of High-Elevation Forests in the Central and Southern Appalachian Mountains
Eastern hemlock (Tsuga canadensis [L.]) is the most shade-tolerant and long-lived tree species in eastern North America. The hemlock woolly adelgid (Adelges tsugae) (HWA), is a nonnative invasive insect that feeds on eastern hemlock and Carolina hemlock (Tsuga caroliniana Engelm.). HWA currently is established in 17 eastern states and is...
