Climate, lightning ignitions, and fire severity in Yosemite National Park, California, USA
J.A. Lutz, J. W. van Wagtendonk, A. E. Thode, J.D. Miller, J.F. Franklin
2009, International Journal of Wildland Fire (18) 765-774
Continental-scale studies of western North America have attributed recent increases in annual area burned and fire size to a warming climate, but these studies have focussed on large fires and have left the issues of fire severity and ignition frequency unaddressed. Lightning ignitions, any of which could burn a large...
Water quality of streams in Johnson County, Kansas, 2002-07
T. J. Rasmussen
2009, Conference Paper, Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers
Water quality of streams in Johnson County, Kansas was evaluated from October 2002 through December 2007 in a cooperative study between the U.S. Geological Survey and the Johnson County Stormwater Management Program. Water quality at 42 stream sites, representing urban and rural basins, was characterized by evaluating benthic macroinvertebrates, water...
Prediction of spectral acceleration response ordinates based on PGA attenuation
V. Graizer, E. Kalkan
2009, Earthquake Spectra (25) 39-69
Developed herein is a new peak ground acceleration (PGA)-based predictive model for 5% damped pseudospectral acceleration (SA) ordinates of free-field horizontal component of ground motion from shallow-crustal earthquakes. The predictive model of ground motion spectral shape (i.e., normalized spectrum) is generated as a continuous function of few parameters. The proposed...
Russian eruption warning systems for aviation
Christina A. Neal, Olga Girina, Sergey Senyukov, Alexander Rybin, Jeffery M. Osiensky, Pavel Izbekov, Gail Ferguson
2009, Natural Hazards (51) 245-262
More than 65 potentially active volcanoes on the Kamchatka Peninsula and the Kurile Islands pose a substantial threat to aircraft on the Northern Pacific (NOPAC), Russian Trans-East (RTE), and Pacific Organized Track System (PACOTS) air routes. The Kamchatka Volcanic Eruption Response Team (KVERT) monitors and reports on volcanic hazards to...
Numerical analysis of the performance of rock weirs: Effects of structure configuration on local hydraulics
C. L. Holmquist-Johnson
2009, Conference Paper, Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers
River spanning rock structures are being constructed for water delivery as well as to enable fish passage at barriers and provide or improve the aquatic habitat for endangered fish species. Current design methods are based upon anecdotal information applicable to a narrow range of channel conditions. The complex flow patterns...
Small-footprint, waveform-resolving lidar estimation of submerged and sub-canopy topography in coastal environments
A. Nayegandhi, J. C. Brock, C. W. Wright
2009, International Journal of Remote Sensing (30) 861-878
The experimental advanced airborne research lidar (EAARL) is an airborne lidar instrument designed to map near-shore submerged topography and adjacent land elevations simultaneously. This study evaluated data acquired by the EAARL system in February 2003 and March 2004 along the margins of Tampa Bay, Florida, USA, to map bare-earth elevations...
Seasonal shifts in shelter and microhabitat use of drymarchon couperi (eastern indigo snake) in Georgia
N.L. Hyslop, R.J. Cooper, J.M. Meyers
2009, Copeia (2009) 458-464
Drymarchon couperi (Eastern Indigo Snake), a threatened species of the southeastern Coastal Plain of the United States, has experienced population declines because of extensive habitat loss and degradation across its range. In Georgia and northern Florida, the species is associated with longleaf pine habitats that support Gopherus polyphemus (Gopher Tortoise)...
Satellite optical and radar data used to track wetland forest impact and short-term recovery from Hurricane Katrina
Elijah W. Ramsey III, A. Rangoonwala, B. Middleton, Z. Lu
2009, Wetlands (29) 66-79
Satellite Landsat Thematic Mapper (TM) and RADARSAT-1 (radar) satellite image data collected before and after the landfall of Hurricane Katrina in the Pearl River Wildlife Management Area on the Louisiana-Mississippi border, USA, were applied to the study of forested wetland impact and recovery. We documented the overall similarity in the...
Characteristics of Southern California coastal aquifer systems
B. D. Edwards, R. T. Hanson, E.G. Reichard, T.A. Johnson
2009, Special Paper of the Geological Society of America 319-344
Most groundwater produced within coastal Southern California occurs within three main types of siliciclastic basins: (1) deep (>600 m), elongate basins of the Transverse Ranges Physiographic Province, where basin axes and related fluvial systems strike parallel to tectonic structure, (2) deep (>6000 m), broad basins of the Los Angeles and...
Physical property data from the ICDP-USGS Eyreville cores A and B, Chesapeake Bay impact structure, Virginia, USA, acquired using a multisensor core logger
H. A. Pierce, J.B. Murray
2009, Special Paper of the Geological Society of America 165-179
The International Continental Scientific Drilling Program (ICDP) and the U.S. Geological Survey (USGS) drilled three core holes to a composite depth of 1766 m within the moat of the Chesapeake Bay impact structure. Core recovery rates from the drilling were high (??90%), but problems with core hole collapse limited the...
Adaptation of farming practices could buffer effects of climate change on northern prairie wetlands
R.A. Voldseth, W.C. Johnson, G.R. Guntenspergen, T. Gilmanov, B.V. Millett
2009, Wetlands (29) 635-647
Wetlands of the Prairie Pothole Region of North America are vulnerable to climate change. Adaptation of farming practices to mitigate adverse impacts of climate change on wetland water levels is a potential watershed management option. We chose a modeling approach (WETSIM 3.2) to examine the effects of changes in climate...
Integrating disparate lidar datasets for a regional storm tide inundation analysis of Hurricane Katrina
Jason M. Stoker, Dean J. Tyler, D. Phil Turnipseed, K. Van Wilson Jr., Michael J. Oimoen
2009, Journal of Coastal Research (Special Issue 53) 66-72
Hurricane Katrina was one of the largest natural disasters in U.S. history. Due to the sheer size of the affected areas, an unprecedented regional analysis at very high resolution and accuracy was needed to properly quantify and understand the effects of the hurricane and the storm tide. Many disparate sources...
Hurricane Wilma's impact on overall soil elevation and zones within the soil profile in a mangrove forest
K.R.T. Whelan, T. J. Smith III, G.H. Anderson, M.L. Ouellette
2009, Wetlands (29) 16-23
Soil elevation affects tidal inundation period, inundation frequency, and overall hydroperiod, all of which are important ecological factors affecting species recruitment, composition, and survival in wetlands. Hurricanes can dramatically affect a site's soil elevation. We assessed the impact of Hurricane Wilma (2005) on soil elevation at a mangrove forest location...
Criticisms biologically unwarranted and analytically irrelevant: Reply to Rominger et al.
Louis C. Bender, M.E. Weisenberger
2009, Journal of Wildlife Management (73) 806-810
The criticisms of Rominger et al. (2008) of our retrospective analysis of desert bighorn sheep (DBS; Ovis canadensis mexicana) dynamics in the San Andres Mountains of south-central New Mexico, USA, contained many biological errors and analytical oversights. Herein, we show that Rominger et al. (2008) 1) overstated both magnitude and...
Hierarchical spatial genetic structure of Common Eiders (Somateria mollissima) breeding along a migratory corridor
Sarah A. Sonsthagen, Sandra L. Talbot, Richard B. Lanctot, Kim T. Scribner, Kevin G. McCracken
2009, The Auk (126) 744-754
Documentation of spatial genetic discordance among breeding populations of Arctic-nesting avian species is important, because anthropogenic change is altering environmental linkages at micro- and macrogeographic scales. We estimated levels of population subdivision within Pacific Common Eiders (Somateria mollissima v-nigrum) breeding on 12 barrier islands in the western...
Rocky Mountain evolution: Tying Continental Dynamics of the Rocky Mountains and Deep Probe seismic experiments with receiver functions
E.-M. Rumpfhuber, Gordon R. Keller, E. Sandvol, A.A. Velasco, D.C. Wilson
2009, Journal of Geophysical Research B: Solid Earth (114)
In this study, we have determined the crustal structure using three different receiver function methods using data collected from the northern transect of the Continental Dynamics of the Rocky Mountains (CD-ROM) experiment. The resulting migrated image and crustal thickness determinations confirm and refine prior crustal thickness measurements based on the...
Megablocks and melt pockets in the Chesapeake Bay impact structure constrained by magnetic field measurements and properties of the Eyreville and Cape Charles cores
A. K. Shah, D. L. Daniels, A. Kontny, J. Brozena
2009, Special Paper of the Geological Society of America 195-208
We use magnetic susceptibility and remanent magnetization measurements of the Eyreville and Cape Charles cores in combination with new and previously collected magnetic field data in order to constrain structural features within the inner basin of the Chesapeake Bay impact structure. The Eyreville core shows the first evidence of several-hundred-meter-thick...
Field camp: Using traditional methods to train the next generation of petroleum geologists
J.O. Puckette, N.H. Suneson
2009, Special Paper of the Geological Society of America 25-34
The summer field camp experience provides many students with their best opportunity to learn the scientific process by making observations and collecting, recording, evaluating, and interpreting geologic data. Field school projects enhance student professional development by requiring cooperation and interpersonal interaction, report writing to communicate interpretations, and the development of...
Soil and nutrient retention in winter-flooded ricefields with implications for watershed management
S.W. Manley, R.M. Kaminski, P.B. Rodrigue, J.C. Dewey, S.H. Schoenholtz, P.D. Gerard, K. J. Reinecke
2009, Journal of Soil and Water Conservation (64) 173-182
The ability of water resources to support aquatic life and human needs depends, in part, on reducing nonpoint source pollution amid contemporary agricultural practices. Winter retention of shallow water on rice and other agricultural fields is an accepted management practice for wildlife conservation; however, soil and water conservation benefits are...
Revised Dst and the epicycles of magnetic disturbance: 1958-2007
J.J. Love, J.L. Gannon
2009, Annales Geophysicae (27) 3101-3131
A revised version of the storm-time disturbance index Dst is calculated using hourly-mean magnetic-observatory data from four standard observatories and collected over the years 1958-2007. The calculation algorithm is a revision of that established by Sugiura et al., and which is now used by the Kyoto World Data Center for...
Migration patterns and wintering range of common loons breeding in the Northeastern United States
K.P. Kenow, D. Adams, N. Schoch, D.C. Evers, W. Hanson, D. Yates, L. Savoy, T.J. Fox, A. Major, R. Kratt, J. Ozard
2009, Waterbirds (32) 234-247
A study, using satellite telemetry, was conducted to determine the precise migration patterns and wintering locations of Common Loons (Gavia immer) breeding in the northeastern United States. Transmitters were implanted in 17 loons (16 adults and one juvenile) that were captured on breeding lakes in New York, New Hampshire, and...
Pliocene three-dimensional global ocean temperature reconstruction
H.J. Dowsett, M.M. Robinson, K.M. Foley
2009, Climate of the Past (5) 769-783
The thermal structure of the mid-Piacenzian ocean is obtained by combining the Pliocene Research, Interpretation and Synoptic Mapping Project (PRISM3) multiproxy sea-surface temperature (SST) reconstruction with bottom water temperature estimates from 27 locations produced using Mg/Ca paleothermometry based upon the ostracod genus Krithe. Deep water temperature estimates are skewed toward...
Improving accessibility to geospatial data using geographic search
J.E. Williams, M.L. Allison, J.B. Kozman
2009, Conference Paper, 2009 17th International Conference on Geoinformatics, Geoinformatics 2009
[No abstract available]...
Comparison with CLPX II airborne data using DMRT model
X. Xu, D. Liang, K.M. Andreadis, L. Tsang, E.G. Josberger
2009, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
In this paper, we considered a physical-based model which use numerical solution of Maxwell Equations in three-dimensional simulations and apply into Dense Media Radiative Theory (DMRT). The model is validated in two specific dataset from the second Cold Land Processes Experiment (CLPX II) at Alaska and Colorado. The data were...
Ultraviolet absorbance as a proxy for total dissolved mercury in streams
J.A. Dittman, J. B. Shanley, C. T. Driscoll, G. R. Aiken, A.T. Chalmers, J.E. Towse
2009, Environmental Pollution (157) 1953-1956
Stream water samples were collected over a range of hydrologic and seasonal conditions at three forested watersheds in the northeastern USA. Samples were analyzed for dissolved total mercury (THgd), DOC concentration and DOC composition, and UV254 absorbance across the three sites over different seasons and flow conditions. Pooling data from...
