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...
On the use of high-resolution topographic data as a proxy for seismic site conditions (VS30)
T.I. Allen, D.J. Wald
2009, Bulletin of the Seismological Society of America (99) 935-943
An alternative method has recently been proposed for evaluating global seismic site conditions, or the average shear velocity to 30 m depth (VS30), from the Shuttle Radar Topography Mission (SRTM) 30 arcsec digital elevation models (DEMs). The basic premise of the method is that the topographic slope can be used...
Titan's surface at 2.2-cm wavelength imaged by the Cassini RADAR radiometer: Calibration and first results
M.A. Janssen, R. D. Lorenz, R. West, F. Paganelli, R.M. Lopes, R. L. Kirk, C. Elachi, S. D. Wall, W.T.K. Johnson, Y. Anderson, R.A. Boehmer, P. Callahan, Y. Gim, G.A. Hamilton, K.D. Kelleher, L. Roth, B. Stiles, Gall A. Le
2009, Icarus (200) 222-239
The first comprehensive calibration and mapping of the thermal microwave emission from Titan's surface is reported based on radiometric data obtained at 2.2-cm wavelength by the passive radiometer included in the Cassini Radar instrument. The data reported were accumulated from 69 separate observational segments in Titan passes from Ta (October...
Case study of a full-scale evapotranspiration cover
Patrick E. McGuire, Brian J. Andraski, Ryan E. Archibald
2009, Journal of Geotechnical and Geoenvironmental Engineering (135) 316-332
The design, construction, and performance analyses of a 6.1ha evapotranspiration (ET) landfill cover at the semiarid U.S. Army Fort Carson site, near Colorado Springs, Colo. are presented. Initial water-balance model simulations, using literature reported soil hydraulic data, aided selection of borrow-source soil type(s) that resulted in predictions...
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...
Foods and nutritional components of diets of black bear in Rocky Mountain National Park, Colorado
R.A. Baldwin, Louis C. Bender
2009, Canadian Journal of Zoology (87) 1000-1008
We used scat analysis to determine diets and relative nutritional values of diets for black bears (Ursus americanus Pallas, 1780) in Rocky Mountain National Park, Colorado, from 2003 to 2006, and compared foods consumed and nutritional components to identify important sources of fecal gross energy (GE), crude fat (CF), and...
Effects of chemical immobilization on survival of African buffalo in the Kruger National Park
W.C. Oosthuizen, P.C. Cross, J.A. Bowers, C. Hay, M.R. Ebinger, P. Buss, M. Hofmeyr, E.Z. Cameron
2009, Journal of Wildlife Management (73) 149-153
Capturing, immobilizing, and fitting radiocollars are common practices in studies of large mammals, but success is based on the assumptions that captured animals are representative of the rest of the population and that the capture procedure has negligible effects. We estimated effects of chemical immobilization on mortality rates of African...
The morphology and distribution of submerged reefs in the Maui-Nui Complex, Hawaii: New insights into their evolution since the Early Pleistocene
Iain D.E. Faichney, James M. Webster, David A. Clague, Chris Kelley, Bruce Applegate, James G. Moore
2009, Marine Geology (265) 130-145
Reef drowning and backstepping have long been recognised as reef responses to sea-level rise on subsiding margins. During the Late Pleistocene (~500–14 ka) Hawaiian reefs grew in response to rapid subsidence and 120 m 100 kyr sea-level cycles, with recent work on the submerged drowned reefs around the...
Spatial and temporal distributions of Martian north polar cold spots before, during, and after the global dust storm of 2001
C. Cornwall, T.N. Titus
2009, Journal of Geophysical Research E: Planets (114)
In the 1970s, Mariner and Viking observed features in the Mars northern polar region that were a few hundred kilometers in diameter with 20 fj,m brightness temperatures as low as 130 K (considerably below C02 ice sublimation temperatures). Over the past decade, studies have shown that these areas (commonly called...
A revised burial dose estimation procedure for optical dating of youngand modern-age sediments
L.J. Arnold, R.G. Roberts, R.F. Galbraith, S.B. DeLong
2009, Quaternary Geochronology (4) 306-325
The presence of genuinely zero-age or near-zero-age grains in modern-age and very young samples poses a problem for many existing burial dose estimation procedures used in optical (optically stimulated luminescence, OSL) dating. This difficulty currently necessitates consideration of relatively simplistic and statistically inferior age models. In this study, we investigate...
Vegetation classification and distribution mapping report: Mesa Verde National Park
Kathryn A. Thomas, Monica L. McTeague, Lindsay Ogden, M. Lisa Floyd, Keith Schulz, Beverly A. Friesen, Tammy S. Fancher, Robert G. Waltermire, Anne Cully
2009, Natural Resource Report NPS/SCPN/NRR—2009/112
The classification and distribution mapping of the vegetation of Mesa Verde National Park (MEVE) and surrounding environment was achieved through a multi-agency effort between 2004 and 2007. The National Park Service’s Southern Colorado Plateau Network facilitated the team that conducted the work, which comprised the U.S. Geological Survey’s Southwest Biological...
A simplified water temperature model for the Colorado River below Glen Canyon Dam
S.A. Wright, C.R. Anderson, N. Voichick
2009, River Research and Applications (25) 675-686
Glen Canyon Dam, located on the Colorado River in northern Arizona, has affected the physical, biological and cultural resources of the river downstream in Grand Canyon. One of the impacts to the downstream physical environment that has important implications for the aquatic ecosystem is the transformation of the thermal regime...
Geomorphology, stability and mobility of the Currituck slide
J. Locat, H. Lee, Uri S. ten Brink, D. Twichell, E. Geist, M. Sansoucy
2009, Marine Geology (264) 28-40
Over the last 100,000??years, the U.S. Atlantic continental margin has experienced various types of mass movements some of which are believed to have taken place at times of low sea level. At one of these times of low sea level a significant trigger caused a major submarine mass movement off...
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)...
Uniform California earthquake rupture forecast, version 2 (UCERF 2)
E. H. Field, T. E. Dawson, K.R. Felzer, A.D. Frankel, V. Gupta, T.H. Jordan, T. Parsons, M.D. Petersen, R.S. Stein, R. J. Weldon, C.J. Wills
2009, Bulletin of the Seismological Society of America (99) 2053-2107
The 2007 Working Group on California Earthquake Probabilities (WGCEP, 2007) presents the Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2). This model comprises a time-independent (Poisson-process) earthquake rate model, developed jointly with the National Seismic Hazard Mapping Program and a time-dependent earthquake-probability model, based on recent earthquake rates and...
Territoriality of feral pigs in a highly persecuted population on Fort Benning, Georgia
B.D. Sparklin, M.S. Mitchell, L.B. Hanson, D.B. Jolley, S.S. Ditchkoff
2009, Journal of Wildlife Management (73) 497-502
We examined home range behavior of female feral pigs (Sus scrofa) in a heavily hunted population on Fort Benning Military Reservation in west-central Georgia, USA. We used Global Positioning System location data from 24 individuals representing 18 sounders (i.e., F social groups) combined with markrecapture and camera-trap data to evaluate...
Using U.S. Geological Survey data in material flow analysis: An introduction
S.F. Sibley
2009, Journal of Industrial Ecology (13) 670-673
A few sources of basic data on worldwide raw materials production and consumption exist that are independently developed and freely available to the public. This column is an introduction to the types of information available from the U.S. Geological Survey (USGS), and explains how the data are assembled. The kind...
Calibration of an estuarine sediment transport model to sediment fluxes as an intermediate step for simulation of geomorphic evolution
N. K. Ganju, D. H. Schoellhamer
2009, Continental Shelf Research (29) 148-158
Modeling geomorphic evolution in estuaries is necessary to model the fate of legacy contaminants in the bed sediment and the effect of climate change, watershed alterations, sea level rise, construction projects, and restoration efforts. Coupled hydrodynamic and sediment transport models used for this purpose typically are calibrated to water level,...
Slip maxima at fault junctions and rupturing of barriers during the 2008 Wenchuan earthquake
Z.-K. Shen, Jielun Sun, P. Zhang, Y. Wan, M. Wang, R. Burgmann, Y. Zeng, Weijun Gan, H. Liao, Q. Wang
2009, Nature Geoscience (2) 718-724
The disastrous 12 May 2008 Wenchuan earthquake in China took the local population as well as scientists by surprise. Although the Longmen Shan fault zonewhich includes the fault segments along which this earthquake nucleatedwas well known, geologic and geodetic data indicate relatively low (<3 mm yr -1) deformation rates. Here...
Quantifying periglacial erosion: Insights on a glacial sediment budget, Matanuska Glacier, Alaska
C. R. O’Farrell, A.M. Heimsath, D. E. Lawson, L.M. Jorgensen, E.B. Evenson, G. Larson, J. Denner
2009, Earth Surface Processes and Landforms (34) 2008-2022
Glacial erosion rates are estimated to be among the highest in the world. Few studies have attempted, however, to quantify the flux of sediment from the periglacial landscape to a glacier. Here, erosion rates from the nonglacial landscape above the Matanuska Glacier, Alaska are presented and compare with an 8-yr...
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...
Modeling misidentification errors in capture-recapture studies using photographic identification of evolving marks
J. Yoshizaki, K. H. Pollock, C. Brownie, R.A. Webster
2009, Ecology (90) 3-9
Misidentification of animals is potentially important when naturally existing features (natural tags) are used to identify individual animals in a capture-recapture study. Photographic identification (photoID) typically uses photographic images of animals' naturally existing features as tags (photographic tags) and is subject to two main causes of identification errors: those related...
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...
