Interior channels in Martian valleys: Constraints on fluvial erosion by measurements of the Mars Express High Resolution Stereo Camera
R. Jaumann, D. Reiss, S. Frei, G. Neukum, F. Scholten, K. Gwinner, T. Roatsch, K.-D. Matz, V. Mertens, E. Hauber, H. Hoffmann, U. Kohler, J.W. Head, H. Hiesinger, M. H. Carr
2005, Geophysical Research Letters (32) 1-4
In High Resolution Stereo Camera (HRSC) images of the Mars Express Mission a 130 km long interior channel is identified within a 400 km long valley network system located in the Lybia Montes. Ages of the valley floor and the surroundings as derived from crater counts define a period of...
Catchment disturbance and stream metabolism: Patterns in ecosystem respiration and gross primary production along a gradient of upland soil and vegetation disturbance
J.N. Houser, P. J. Mulholland, K.O. Maloney
2005, Journal of the North American Benthological Society (24) 538-552
Catchment characteristics determine the inputs of sediments and nutrients to streams. As a result, natural or anthropogenic disturbance of upland soil and vegetation can affect instream processes. The Fort Benning Military Installation (near Columbus, Georgia) exhibits a wide range of upland disturbance levels because of spatial variability in the intensity...
Large-scale 3D subsurface conductivity imaging using full-wave forward modeling
G.L. Wang, W.C. Chew, T.J. Cui, D.L. Wright, D.V. Smith
2005, Conference Paper, IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
[No abstract available]...
Polar climate: Arctic sea ice
R. S. Stone, David C. Douglas, G. I. Belchansky, S. D. Drobot
2005, Bulletin of the American Meteorological Society (86) S39-S41
Recent decreases in snow and sea ice cover in the high northern latitudes are among the most notable indicators of climate change. Northern Hemisphere sea ice extent for the year as a whole was the third lowest on record dating back to 1973, behind 1995 (lowest) and 1990 (second lowest;...
Communicating with wildland interface communities during wildfire
Jonathan G. Taylor, Shana C. Gillette, Ronald W. Hodgson, Judith L. Downing
2005, Open-File Report 2005-1061
An inter-agency research team studied communications during the small Bridge Fire in southern California, as well the before-, during-, and post-fire communications of an extreme fire event (Old and Grand Prix Fires) in the same area in the fall of 2003. This “quick-response” research showed that pre-fire communication planning was...
Outstanding issues for new geothermal resource assessments
C.F. Williams, M.J. Reed
2005, Conference Paper, Transactions - Geothermal Resources Council
A critical question for the future energy policy of the United States is the extent to which geothermal resources can contribute to an ever-increasing demand for electricity. Electric power production from geothermal sources exceeds that from wind and solar combined, yet the installed capacity falls far short of the geothermal...
Seismicity and tilt associated with the 2003 Anatahan eruption sequence
S.H. Pozgay, R.A. White, D.A. Wiens, P.J. Shore, A.W. Sauter, J.L. Kaipat
2005, Journal of Volcanology and Geothermal Research (146) 60-76
On May 10, 2003, the first historical eruption of Anatahan volcano in the western Pacific Mariana Islands was fortuitously recorded by a broadband seismograph installed on the island only 4 days prior to the eruption. This station, located 7 km WNW of the active crater, together with another broadband seismograph...
Post-precipitation bias in band-tailed pigeon surveys conducted at mineral sites
C.T. Overton, R.A. Schmitz, Michael L. Casazza
2005, Wildlife Society Bulletin (33) 1047-1054
Many animal surveys to estimate populations or index trends include protocol prohibiting counts during rain but fail to address effects of rainfall preceding the count. Prior research on Pacific Coast band-tailed pigeons (Patagioenas fasciata monilis) documented declines in use of mineral sites during rainfall. We hypothesized that prior precipitation was...
Site characterization in densely fractured dolomite: Comparison of methods
M. Muldoon, K. R. Bradbury
2005, Ground Water (43) 863-876
One of the challenges in characterizing fractured-rock aquifers is determining whether the equivalent porous medium approximation is valid at the problem scale. Detailed hydrogeologic characterization completed at a small study site in a densely fractured dolomite has yielded an extensive data set that was used to evaluate the utility of...
Assessing water source and channel type as factors affecting benthic macroinvertebrate and periphyton assemblages in the highly urbanized Santa Ana River Basin, California
Carmen A. Burton, Larry R. Brown, Kenneth Belitz
2005, American Fisheries Society Symposium (2005) 239-262
The Santa Ana River basin is the largest stream system in Southern California and includes a densely populated coastal area. Extensive urbanization has altered the geomorphology and hydrology of the streams, adversely affecting aquatic communities. We studied macroinvertebrate and periphyton assemblages in relation to two categorical features of the highly...
Individual variation in staging and timing of spring migration of Pacific common eiders in Alaska
Margaret R. Petersen
2005, Conference Paper, Second North America Sea Duck Conference
Timing of migration and characterization of migration patterns of birds are usually based on dates of peak migration to and from staging, wintering, and breeding areas used by the bulk of a species. For Pacific common eiders (Somateria mollissima v-nigrum), as well as other species, the timing of migration into...
Geochemistry and jasper beds from the Ordovician Løkken ophiolite, Norway: origin of proximal and distal siliceous exhalites
Tor Grenne, John F. Slack
2005, Economic Geology (100) 1511-1527
Stratiform beds of jasper (hematitic chert), composed essentially of SiO2 (69–95 wt %) and Fe2O3 (3–25 wt %), can be traced several kilometers along strike in the Ordovician Løkken ophiolite, Norway. These siliceous beds are closely associated with volcanogenic massive sulfide (VMS) deposits and are interpreted as sea-floor gels that were deposited...
Summary of dimensionless Texas hyetographs and distribution of storm depth developed for Texas Department of Transportation research project 0–4194
William H. Asquith, Meghan C. Roussel, David B. Thompson, Theodore G. Cleveland, Xing Fang
2005, Report
Hyetographs and storm depth distributions are important elements of hydraulic design by Texas Department of Transportation engineers. Design hyetographs are used in conjunction with unit hydrographs to obtain peak discharge and hydrograph shape for hydraulic design. Storm-depth distributions can be used to assess the probability of a total rainfall depth...
Carbon isotopes from fossil packrat pellets and elevational movements of Utah agave plants reveal the Younger Dryas cold period in Grand Canyon, Arizona
K.L. Cole, S.T. Arundel
2005, Geology (33) 713-716
Carbon isotopes in rodent fecal pellets were measured on packrat (Neotoma spp.) middens from the Grand Canyon, Arizona. The pellet samples reflect the abundance of cold-intolerant C4 and Crassulacean acid metabolism (CAM) plant species relative to the predominant C3 vegetation in the packrat diet. The temporal sequence of isotopic results...
Trophic transfer of metals along freshwater food webs: Evidence of cadmium biomagnification in nature
M.-N. Croteau, S. N. Luoma, A.R. Stewart
2005, Limnology and Oceanography (50) 1511-1519
We conducted a study with cadmium (Cd) and copper (Cu) in the delta of San Francisco Bay, using nitrogen and carbon stable isotopes to identify trophic position and food web structure. Cadmium is progressively enriched among trophic levels in discrete epiphyte‐based food webs composed of macrophyte‐dwelling invertebrates...
Raccoon removal reduces sea turtle nest depredation in the Ten Thousand Islands of Florida
A.S. Garmestani, H.F. Percival
2005, Southeastern Naturalist (4) 469-472
Predation by raccoons, Procyon lotor marinus (L.), is the primary cause of sea turtle nest loss in the Ten Thousand Islands archipelago. Four islands within Ten Thousand Islands National Wildlife Refuge were surveyed for sea turtle nesting activity from 1991-95. Raccoons depredated 76-100% of nests on Panther Key from 1991-94,...
Juvenile frogs compensate for small metamorph size with terrestrial growth: Overcoming the effects of larval density and insecticide exposure
Michelle D. Boone
2005, Journal of Herpetology (39) 416-423
I reared four species of anurans (Rana sphenocephala [Southern Leopard Frog], Rana blairi [Plains Leopard Frog], Rana clamitans [Green Frog], and Bufo woodhousii [Woodhouse's Toad]) for seven to 12 months in small, outdoor terrestrial enclosures (1 × 2 m) to examine the consequences of larval competition (via density)...
Diagenesis and late-stage porosity development in the Pennsylvanian Strawn Formation, Val Verde basin, Texas, U.S.A
K. David Newell, R.H. Goldstein, C. J. Burdick
2005, AAPG Memoir (48) 333-350
The Middle Pennsylvanian (Desmoinesian) Strawn Formation in the Trans-Pecos area of Texas was deposited during relative tectonic quiescence that prevailed before rapid infilling of the Val Verde Basin. It represents one of a series of backstepping carbonate ramps formed on the craton side of this foreland basin. Strawn Formation carbonate...
UHF RiverSonde observations of water surface velocity at Threemile Slough, California
C.C. Teague, D.E. Barrick, P.M. Lilleboe, R. T. Cheng, C.A. Ruhl
2005, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
A UHF RiverSonde system, operating near 350 MHz, has been in operation at Threemile Slough in central California, USA since September 2004. The water in the slough is dominated by tidal effects, with flow reversals four times a day and a peak velocity of about 0.8 m/s in each direction....
Literature review on timing parameters for hydrographs
Xing Fang, Theodore G. Cleveland, C.A. Garcia, David Thompson, Ranjit Malla
2005, Austin, Texas Department of Transportation Report 0–4696–1
No abstract available....
Regional economic effects of current and proposed management alternatives for Sand Lake National Wildlife Refuge
Lynne Koontz, Heather Lambert
2005, Open-File Report 2005-1195
The National Wildlife Refuge System Improvement Act of 1997 requires all units of the National Wildlife Refuge System to be managed under a Comprehensive Conservation Plan (CCP). The CCP must describe the desired future conditions of a Refuge and provide long range guidance and management direction to achieve Refuge purposes....
Adsorption equilibrium of organic vapors on single-walled carbon nanotubes
S. Agnihotri, M.J. Rood, M. Rostam-Abadi
2005, Carbon (43) 2379-2388
Gravimetric techniques were employed to determine the adsorption capacities of commercially available purified electric arc and HiPco single-walled carbon nanotubes (SWNTs) for organic compounds (toluene, methyl ethyl ketone (MEK), hexane and cyclohexane) at relative pressures, p/p0, ranging from 1 ?? 10-4 to 0.95 and at isothermal conditions of 25, 37...
Productivity and mortality of Northern Goshawks in Minnesota
C. W. Boal, D. E. Andersen, P.L. Kennedy
2005, Journal of Raptor Research (39) 222-228
Compared to other regions of North America, little information exists regarding Northern Goshawk (Accipiter gentilis) ecology and population dynamics in the western Great Lakes Region. We examined productivity and nesting habitat characteristics of goshawks in Minnesota from 1998-2001. Apparent nesting success varied annually from as low as 38% to as...
2004 annual progress report: Stratton Sagebrush Hydrology Study Area: Establishment of a long-term research site in a high-elevation sagebrush steppe
Kate Schoenecker, Bob Lange, Mike Calton
2005, Open-File Report 2005-1426
In 2004 the U.S. Geological Survey, Fort Collins Science Center (FORT) and the Bureau of Land Management (BLM), Rawlins Field Office (RFO), began a cooperative effort to reestablish the Stratton Sagebrush Hydrology Study Area (Stratton) as a research location, with the goal of making it a site for long-term research...
Influence of waves and horseshoe crab spawning on beach morphology and sediment grain-size characteristics on a sandy estuarine beach
N.L. Jackson, K.F. Nordstrom, D. R. Smith
2005, Sedimentology (52) 1097-1108
The effects of wave action and horseshoe crab spawning on the topography and grain-size characteristics on the foreshore of an estuarine sand beach in Delaware Bay, New Jersey, USA were evaluated using data collected over six consecutive high tides. Data were gathered inside and outside a 25 m long exclosure...
