The ionospheric impact on GPS performance in southern polar region
C.-K. Hong, D. A. Grejner-Brzezinska, N. Arslan, M. Willis, L. Hothem
2006, Conference Paper, Proceedings of the Institute of Navigation - 19th International Technical Meeting of the Satellite Division, ION GNSS 2006
The primary objective of this paper is to present the results of the study of the effects of varying ionospheric conditions on the GPS signal tracking in the southern polar region. In the first stage of this study, the data collected by the OSU/USGS team in October-November 2003 within the...
Life history, ecology and population viability analysis of the Independence Lake strain Lahontan Cutthroat trout
P.H. Rissler, G.G. Scoppettone, S. Shea
2006, Report
n/a...
Effects of sample survey design on the accuracy of classification tree models in species distribution models
T.C. Edwards Jr., D.R. Cutler, N.E. Zimmermann, L. Geiser, Gretchen G. Moisen
2006, Ecological Modelling (199) 132-141
We evaluated the effects of probabilistic (hereafter DESIGN) and non-probabilistic (PURPOSIVE) sample surveys on resultant classification tree models for predicting the presence of four lichen species in the Pacific Northwest, USA. Models derived from both survey forms were assessed using an independent data set (EVALUATION). Measures of accuracy as gauged...
Emplacement of the Kodiak batholith and slab-window migration
David W. Farris, Peter J. Haeussler, Richard Friedman, Scott R. Paterson, R. W. Saltus, Robert A. Ayuso
2006, Geological Society of America Bulletin (118) 1360-1376
The Kodiak batholith is one of the largest, most elongate intrusive bodies in the forearc Sanak-Baranof plutonic belt located in southern Alaska. This belt is interpreted to have formed during the subduction of an oceanic spreading center and the associated migration of a slab window. Individual plutons of the Kodiak...
Large internal waves in Massachusetts Bay transport sediments offshore
B. Butman, P. S. Alexander, A. Scotti, R.C. Beardsley, S.P. Anderson
2006, Continental Shelf Research (26) 2029-2049
A field experiment was carried out in Massachusetts Bay in August 1998 to assess the role of large-amplitude internal waves (LIWs) in resuspending bottom sediments. The field experiment consisted of a four-element moored array extending from just west of Stellwagen Bank (90-m water depth) across Stellwagen Basin (85- and 50-m...
Possible effects of the 2004 and 2005 hurricanes on manatee survival rates and movement
C.A. Langtimm, M. D. Krohn, J.P. Reid, B.M. Stith, C.A. Beck
2006, Estuaries and Coasts (29) 1026-1032
Prior research on manatee (Trichechus manatus latirostris) survival in northwest Florida, based on mark-resighting photo-identification data from 1982-1998, showed that annual adult apparent survival rate was significantly lower during years with extreme storms. Mechanisms that we proposed could have led to lower estimates included stranding, injury from debris, being fatally...
An isolate of Piscirickettsia salmonis from white seabass is fully virulent for coho salmon
M.L. House, R.P. Hedrick, J. R. Winton, J. L. Fryer
2006, Journal of Aquatic Animal Health (18) 252-256
The virulence of the WSB-98 isolate of Piscirickettsia salmonis from white seabass Atractoscion nobilis was compared with that of the American Type Culture Collection type strain LF-89, which was originally isolated from coho salmon Oncorhynchus kisutch in Chile. In controlled laboratory challenges of juvenile coho salmon, the isolate from white...
Guideline for assessing the performance of electric power systems in natural hazard and human threat events
W.U. Savage, S.P. Nishenko, D.G. Honegger, L. Kempner Jr.
2006, Conference Paper, Electrical Transmission Line and Substation Structures: Structural Reliability in a Changing World - Proceedings of the 2006 Electrical Transmission Conference
Electric power utilities are familiar with and skilled in preparing for and responding to almost-routine natural hazard events such as strong wind and ice storms and seasonal floods, as well as intentional human acts such as vandalism. Recent extreme weather (hurricanes Katrina and Rita), extremely destructive international earthquakes (in Sumatra...
Late Cretaceous base level lowering in Campanian and Maastrichtian depositional sequences, Kure Beach, North Carolina
W.B. Harris, Self-Trail J.M.
2006, Stratigraphy (3) 195-216
Campanian through Maastrichtian mixed carbonate and siliciclastic sediments in a 422 m continuous core drilled at Kure Beach, NC provide a record of sea-level change. Based on lithology and stratigraphy, depositional sequences are defined, and calcareous nannofossil zones and 87Sr/86Sr ratios and corresponding ages using the LOWESS Table determined. Campanian...
Slip on the San Andreas fault at Parkfield, California, over two earthquake cycles, and the implications for seismic hazard
J. Murray, J. Langbein
2006, Bulletin of the Seismological Society of America (96)
Parkfield, California, which experienced M 6.0 earthquakes in 1934, 1966, and 2004, is one of the few locales for which geodetic observations span multiple earthquake cycles. We undertake a comprehensive study of deformation over the most recent earthquake cycle and explore the results in the context of geodetic data collected...
Linking middle-school teachers to Earthscope
R. Butler, E. Bishop, C. Ault Jr., B. Atwater, B. Magura, C. Hedeen, R. Blakely, Ray E. Wells, K. Shay, R. Wagner, T. Southworth-Neumeyer, D. Connor
2006, Eos, Transactions, American Geophysical Union (87) 257-259
EarthScope is a multidisciplinary geophysical investigation of the structure and deformation of the North American continent. Components include a transportable array of digital seismometers (USArray) that will image the continental crust and underlying mantle, and Global Positioning System (GPS) receivers and strainmeters (Plate Boundary Observatory, PBO) that will measure tectonic...
Inhibition of coral recruitment by macroalgae and cyanobacteria
I. B. Kuffner, L.J. Walters, M.A. Becerro, V.J. Paul, R. Ritson-Williams, K.S. Beach
2006, Marine Ecology Progress Series (323) 107-117
Coral recruitment is a key process in the maintenance and recovery of coral reef ecosystems. While intense competition between coral and algae is often assumed on reefs that have undergone phase shifts from coral to algal dominance, data examining the competitive interactions involved, particularly during the larval and immediate post-settlement...
Testing the concept of drift shadow at Yucca Mountain, Nevada
J.B. Paces, L.A. Neymark, T. Ghezzehei, P.F. Dobson
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
If proven, the concept of drift shadow, a zone of reduced water content and slower ground-water travel time beneath openings in fractured rock of the unsaturated zone, may increase performance of a proposed geologic repository for high-level radioactive waste at Yucca Mountain, To test this concept under natural-flow conditions present...
Occurrence and fate of organic contaminants during onsite wastewater treatment
K.E. Conn, L. B. Barber, G.K. Brown, R.L. Siegrist
2006, Environmental Science & Technology (40) 7358-7366
Onsite wastewater treatment systems serve approximately 25% of the U.S. population. However, little is known regarding the occurrence and fate of organic wastewater contaminants (OWCs), including endocrine disrupting compounds, during onsite treatment. A range of OWCs including surfactant metabolites, steroids, stimulants, metal-chelating agents, disinfectants, antimicrobial agents, and...
Infectious haematopoietic necrosis (IHN) virus disease in sockeye salmon (Oncorhynchus nerka)
Diane G. Elliott
D.W. Bruno, D.G. Elliott, B. Nowak, editor(s)
2006, Conference Paper, EAFP 2005 Copenhagen Histopathology Workshop. Reproductive pathology and early life stages pathology: Notes and images
No abstract available....
Paleotsunami research
B. Rhodes, M. Tuttle, B. Horton, L. Doner, H. Kelsey, A. Nelson, M. Cisternas
2006, Eos, Transactions, American Geophysical Union (87) 208-209
[No abstract available]...
Analogues as a check of predicted drift stability at Yucca Mountain, Nevada
J. S. Stuckless
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Calculations made by the U.S. Department of Energy's Yucca Mountain Project as part of the licensing of a proposed geologic repository in southwestern Nevada for the disposal of high-level radioactive waste, predict that emplacement tunnels will remain open with little collapse long after ground support has disintegrated. This conclusion includes...
Hydroacoustic estimation of zooplankton biomass at two shoal complexes in the Apostle Islands Region of Lake Superior
B.V. Holbrook, T.R. Hrabik, D.K. Branstrator, D.L. Yule, J.D. Stockwell
2006, Journal of Great Lakes Research (32) 680-696
Hydroacoustics can be used to assess zooplankton populations, however, backscatter must be scaled to be biologically meaningful. In this study, we used a general model to correlate site-specific hydroacoustic backscatter with zooplankton dry weight biomass estimated from net tows. The relationship between zooplankton dry weight and backscatter was significant (p...
Increasing streamflow and baseflow in Mississippi River since the 1940 s: Effect of land use change
Y.-K. Zhang, K. E. Schilling
2006, Journal of Hydrology (324) 412-422
A trend of increasing streamflow has been observed in the Mississippi River (MR) basin since the 1940 s as a result of increased precipitation. Herein we show that increasing MR flow is mainly in its baseflow as a result of land use change and accompanying agricultural activities that occurred in...
Use of borehole radar reflection logging to monitor steam-enhanced remediation in fractured limestone--Results of numerical modelling and a field experiment
C. Gregoire, P. K. Joesten, J.W. Lane Jr.
2006, Journal of Applied Geophysics (60) 41-54
Ground penetrating radar is an efficient geophysical method for the detection and location of fractures and fracture zones in electrically resistive rocks. In this study, the use of down-hole (borehole) radar reflection logs to monitor the injection of steam in fractured rocks was tested as part of a field-scale, steam-enhanced...
The fifth International Geological Congress, Washington, 1891
C.M. Nelson
2006, Conference Paper, Episodes
The 5th International Geological Congress (IGC), the initial meeting in North America, was the first of the three IGCs that have been held in the United States of America (USA). Of the 538 registrants alive when the 5th IGC convened in Washington, 251 persons, representing fifteen countries, actually attended the...
Grassland songbirds in a dynamic management landscape: Behavioral responses and management strategies
N.G. Perlut, A.M. Strong, T.M. Donovan, N. J. Buckley
2006, Ecological Applications (16) 2235-2247
In recent decades, earlier and more frequent harvests of agricultural grasslands have been implicated as a major cause of population declines in grassland songbirds. From 2002 to 2005, in the Champlain Valley of Vermont and New York, USA, we studied the reproductive success of Savannah Sparrows (Passerculus sandwichensis) and Bobolinks...
Juvenile salmonid use of freshwater emergent wetlands in the floodplain and its implications for conservation management
Julie A. Henning, Robert E. Gresswell, Ian A. Fleming
2006, North American Journal of Fisheries Management (26) 367-376
A recent trend of enhancing freshwater emergent wetlands for waterfowl and other wildlife has raised concern about the effects of such measures on juvenile salmonids. We undertook this study to quantify the degree and extent of juvenile Pacific salmon Oncorhynchus spp. utilization of enhanced and unenhanced emergent wetlands within the...
Net carbon exchange across the Arctic tundra-boreal forest transition in Alaska 1981-2000
Catharine Copass Thompson, A. D. McGuire, Joy S. Clein, F. S. Chapin III, J. Beringer
2006, Conference Paper, Mitigation and Adaptation Strategies for Global Change
Shifts in the carbon balance of high-latitude ecosystems could result from differential responses of vegetation and soil processes to changing moisture and temperature regimes and to a lengthening of the growing season. Although shrub expansion and northward movement of treeline should increase carbon inputs, the effects of these vegetation changes...
Historical trace element distribution in sediments from the Mississippi River delta
P.W. Swarzenski, M. Baskaran, R.J. Rosenbauer, W. H. Orem
2006, Estuaries and Coasts (29) 1094-1107
Five sediment cores were collected on the shelf of the inner Mississippi Bight in June 2003 for a suite of radionuclides to establish geochronologies and trace elements to examine patterns of contaminant deposition and accumulation. Core sites were chosen to reflect a matrix of variable water depths, proximity to the...
