Mercury trends in fish from rivers and lakes in the United States, 1969-2005
A.T. Chalmers, D.M. Argue, D.A. Gay, M. E. Brigham, C. J. Schmitt, D. L. Lorenz
2011, Environmental Monitoring and Assessment (175) 175-191
A national dataset on concentrations of mercury in fish, compiled mainly from state and federal monitoring programs, was used to evaluate trends in mercury (Hg) in fish from US rivers and lakes. Trends were analyzed on data aggregated by site and by state, using samples of the same fish species...
Ground settlement monitoring based on temporarily coherent points between two SAR acquisitions
L. Zhang, X. Ding, Z. Lu
2011, ISPRS Journal of Photogrammetry and Remote Sensing (66) 146-152
An InSAR analysis approach for identifying and extracting the temporarily coherent points (TCP) that exist between two SAR acquisitions and for determining motions of the TCP is presented for applications such as ground settlement monitoring. TCP are identified based on the spatial characteristics of the range and azimuth offsets of...
Factors Controlling Pre-Columbian and Early Historic Maize Productivity in the American Southwest, Part 1: The Southern Colorado Plateau and Rio Grande Regions
L. V. Benson
2011, Journal of Archaeological Method and Theory (18) 1-60
Maize is the New World's preeminent grain crop and it provided the economic basis for human culture in many regions within the Americas. To flourish, maize needs water, sunlight (heat), and nutrients (e. g., nitrogen). In this paper, climate and soil chemistry data are used to evaluate the potential for...
Advancing environmental toxicology through chemical dosimetry: External exposures versus tissue residues
L.S. McCarty, P.F. Landrum, S. N. Luoma, J.P. Meador, A.A. Merten, B.K. Shephard, A.P. van Wezelzz
2011, Integrated Environmental Assessment and Management (7) 7-27
The tissue residue dose concept has been used, although in a limited manner, in environmental toxicology for more than 100 y. This review outlines the history of this approach and the technical background for organic chemicals and metals. Although the toxicity of both can be explained in tissue residue terms,...
Hydrogeology, Chemical and Microbial Activity Measurement Through Deep Permafrost
R.L. Stotler, S.K. Frape, B.M. Freifeld, B. Holden, T.C. Onstott, T. Ruskeeniemi, E. Chan
2011, Ground Water (49) 348-364
Little is known about hydrogeochemical conditions beneath thick permafrost, particularly in fractured crystalline rock, due to difficulty in accessing this environment. The purpose of this investigation was to develop methods to obtain physical, chemical, and microbial information about the subpermafrost environment from a surface-drilled borehole. Using a U-tube, gas and...
Modeling hydrologic and geomorphic hazards across post-fire landscapes using a self-organizing map approach
Michael J. Friedel
2011, Environmental Modelling and Software (26) 1660-1674
Few studies attempt to model the range of possible post-fire hydrologic and geomorphic hazards because of the sparseness of data and the coupled, nonlinear, spatial, and temporal relationships among landscape variables. In this study, a type of unsupervised artificial neural network, called a self-organized map (SOM), is trained using data...
Survey of stranded gas and delivered costs to Europe of selected gas resources
Emil D. Attanasi, Philip A. Freeman
2011, Conference Paper
Two important trends affecting the expected growth of global gas markets are (1) the shift by many industrialized countries from coal-fired electricity generation to the use of natural gas to generate electricity and (2) the industrialization of the heavily populated Asian countries of India and China. This paper surveys discovered...
Evaluation of the Global Multi-Resolution Terrain Elevation Data 2010 (GMTED2010) using ICESat geodetic control
C.C. Carabajal, D.J. Harding, J.-P. Boy, Jeffrey J. Danielson, D.B. Gesch, V.P. Suchdeo
2011, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
Supported by NASA's Earth Surface and Interior (ESI) Program, we are producing a global set of Ground Control Points (GCPs) derived from the Ice, Cloud and land Elevation Satellite (ICESat) altimetry data. From February of 2003, to October of 2009, ICESat obtained nearly global measurements of land topography (+/- 86deg...
Inversion of ground-motion data from a seismometer array for rotation using a modification of Jaeger's method
Wu-Cheng Chi, W.H.K. Lee, J.A.D. Aston, C.J. Lin, C.-C. Liu
2011, Bulletin of the Seismological Society of America (101) 3105-3109
We develop a new way to invert 2D translational waveforms using Jaeger's (1969) formula to derive rotational ground motions about one axis and estimate the errors in them using techniques from statistical multivariate analysis. This procedure can be used to derive rotational ground motions and strains using arrayed translational data,...
Migration delays caused by anthropogenic barriers: Modeling dams, temperature, and success of migrating salmon smolts
E.A. Marschall, M. E. Mather, D.L. Parrish, G.W. Allison, J.R. McMenemy
2011, Ecological Applications (21) 3014-3031
Disruption to migration is a growing problem for conservation and restoration of animal populations. Anthropogenic barriers along migration paths can delay or prolong migrations, which may result in a mismatch with migration-timing adaptations. To understand the interaction of dams (as barriers along a migration path), seasonally changing environmental conditions, timing...
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...
High-precision measurement of variations in calcium isotope ratios in urine by multiple collector inductively coupled plasma mass spectrometry
J.L.L. Morgan, G.W. Gordon, R.C. Arrua, J.L. Skulan, A.D. Anbar, T.D. Bullen
2011, Analytical Chemistry (83) 6956-6962
We describe a new chemical separation method to isolate Ca from other matrix elements in biological samples, developed with the long-term goal of making high-precision measurement of natural stable Ca isotope variations a clinically applicable tool to assess bone mineral balance. A new two-column procedure utilizing HBr achieves the purity...
Monitoring a large volume CO2 injection: Year two results from SECARB project at Denbury’s Cranfield, Mississippi, USA
Susan D. Hovorka, Timothy A. Meckel, Ramon H. Trevino, Jiemin Lu, Jean-Philippe Nicot, Jong-Won Choi, David Freeman, Paul Cook, Thomas M. Daley, Jonathan B. Ajo-Franklin, Barry M. Freifeild, Christine Doughty, Charles R. Carrigan, Doug La Brecque, Yousif K. Kharaka, James J. Thordsen, Tommy J. Phelps, Changbing Yang, Katherine D. Romanak, Tongwei Zhang, Robert M. Holt, Jeffery S. Lindler, Robert J. Butsch
2011, Energy Procedia (4) 3478-3485
The Southeast Regional Carbon Sequestration Partnership (SECARB) early project in western Mississippi has been testing monitoring tools and approaches to document storage efficiency and storage permanence under conditions of CO2 EOR as well as downdip injection into brine. Denbury Onshore LLC is host for the study and has brought a...
Vibrational, X-ray absorption, and Mössbauer spectra of sulfate minerals from the weathered massive sulfide deposit at Iron Mountain, California
Juraj Majzlan, Charles N. Alpers, Christian Bender Koch, R. Blaine McCleskey, Satish B.C. Myneni, John M. Neil
2011, Chemical Geology (284) 296-305
The Iron Mountain Mine Superfund site in California is a prime example of an acid mine drainage (AMD) system with well developed assemblages of sulfate minerals typical for such settings. Here we present and discuss the vibrational (infrared), X-ray absorption, and M??ssbauer spectra of a number of these phases, augmented...
Redefinition and global estimation of basal ecosystem respiration rate
W. Yuan, Y. Luo, X. Li, S. Liu, G. Yu, T. Zhou, M. Bahn, A. Black, A.R. Desai, A. Cescatti, B. Marcolla, C. Jacobs, J. Chen, M. Aurela, C. Bernhofer, B. Gielen, G. Bohrer, D.R. Cook, D. Dragoni, A.L. Dunn, D. Gianelle, T. Grnwald, A. Ibrom, M.Y. Leclerc, A. Lindroth, H. Liu, L.B. Marchesini, L. Montagnani, G. Pita, M. Rodeghiero, A. Rodrigues, G. Starr, Paul C. Stoy
2011, Global Biogeochemical Cycles (25) 1-14
Basal ecosystem respiration rate (BR), the ecosystem respiration rate at a given temperature, is a common and important parameter in empirical models for quantifying ecosystem respiration (ER) globally. Numerous studies have indicated that BR varies in space. However, many empirical ER models still use a global constant BR largely due...
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)....
Multi-scale temporal and spatial variation in genotypic composition of Cladophora-borne Escherichia coli populations in Lake Michigan
B.D. Badgley, J. Ferguson, A.V. Heuvel, G.T. Kleinheinz, C.M. McDermott, T.R. Sandrin, J. Kinzelman, E.A. Junion, M.N. Byappanahalli, R.L. Whitman, M.J. Sadowsky
2011, Water Research (45) 721-731
High concentrations of Escherichia coli in mats of Cladophora in the Great Lakes have raised concern over the continued use of this bacterium as an indicator of microbial water quality. Determining the impacts of these environmentally abundant E. coli, however, necessitates a better understanding of their ecology. In this study,...
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...
Monitoring and inversion on land subsidence over mining area with InSAR technique
Y. Wang, Q. Zhang, C. Zhao, Z. Lu, X. Ding
2011, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The Wulanmulun town, located in Inner Mongolia, is one of the main mining areas of Shendong Company such as Shangwan coal mine and Bulianta coal mine, which has been suffering serious mine collapse with the underground mine withdrawal. We use ALOS/PALSAR data to extract land deformation under these regions, in...
Mantle to surface degassing of alkalic magmas at Erebus volcano, Antarctica
C. Oppenheimer, R. Moretti, P.R. Kyle, A. Eschenbacher, Jacob B. Lowenstern, R.L. Hervig, N. W. Dunbar
2011, Earth and Planetary Science Letters (306) 261-271
Continental intraplate volcanoes, such as Erebus volcano, Antarctica, are associated with extensional tectonics, mantle upwelling and high heat flow. Typically, erupted magmas are alkaline and rich in volatiles (especially CO2), inherited from low degrees of partial melting of mantle sources. We examine the degassing of the magmatic system at Erebus...
Three-dimensional surface deformation mapping by convensional interferometry and multiple aperture interferometry
H.-S. Jung, Z. Lu, C.-W. Lee
2011, Conference Paper, 2011 3rd International Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2011
Interferometric synthetic aperture radar (InSAR) technique has been successfully used for mapping surface deformations [1-2], but it has been normally limited to a measurement along the radar line-of-sight (LOS) direction. For this reason, it is impossible to determine the north (N-S) component of surface deformation because of using data from...
Could residual oil from the Exxon Valdez spill create a long-term population "sink" for sea otters in Alaska?
Daniel H. Monson, Daniel F. Doak, Brenda E. Ballachey, James L. Bodkin
2011, Ecological Applications (21) 2917-2932
Over 20 years ago, the Exxon Valdez oil tanker spilled 42 million L of crude oil into the waters of Prince William Sound, Alaska, USA. At the time of the spill, the sea otter (Enhydra lutris) population inhabiting the spill area suffered substantial acute injuries and loss. Subsequent research has...
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:...
Vegetation index-based crop coefficients to estimate evapotranspiration by remote sensing in agricultural and natural ecosystems
E. P. Glenn, C. M. U. Neale, D.J. Hunsaker, P.L. Nagler
2011, Hydrological Processes (25) 4050-4062
Crop coefficients were developed to determine crop water needs based on the evapotranspiration (ET) of a reference crop under a given set of meteorological conditions. Starting in the 1980s, crop coefficients developed through lysimeter studies or set by expert opinion began to be supplemented by remotely sensed vegetation indices (VI)...
Mapping irrigated areas of Ghana using fusion of 30 m and 250 m resolution remote-sensing data
M.K. Gumma, P.S. Thenkabail, F. Hideto, A. Nelson, V. Dheeravath, D. Busia, A. Rala
2011, Remote Sensing (3) 816-835
Maps of irrigated areas are essential for Ghana's agricultural development. The goal of this research was to map irrigated agricultural areas and explain methods and protocols using remote sensing. Landsat Enhanced Thematic Mapper (ETM+) data and time-series Moderate Resolution Imaging Spectroradiometer (MODIS) data were used to map irrigated agricultural areas...
