Eruptive history and geochronology of Mount Mazama and the Crater Lake region, Oregon
Charles R. Bacon, Marvin A. Lanphere
2006, Geological Society of America Bulletin (118) 1331-1359
Geologic mapping, K-Ar, and 40Ar/39Ar age determinations, supplemented by paleomagnetic measurements and geochemical data, are used to quantify the Quaternary volcanic history of the Crater Lake region in order to define processes and conditions that led to voluminous explosive eruptions. The Cascade arc volcano...
New ghost-node method for linking different models with varied grid refinement
S.C. James, J.E. Dickinson, S.W. Mehl, M. C. Hill, S. A. Leake, G.A. Zyvoloski, A.-A. Eddebbarh
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
A flexible, robust method for linking grids of locally refined ground-water flow models constructed with different numerical methods is needed to address a variety of hydrologic problems. This work outlines and tests a new ghost-node model-linking method for a refined "child" model that is contained within a larger and coarser...
In vitro interactions between Neoparamoeba spp. and salmonid leucocytes; The effect of parasite sonicate on anterior kidney leucocyte function
K. Gross, S. Alcorn, A. Murray, R. Morrison, B. Nowak
2006, Journal of Fish Biology (69) 293-300
Sonicated Neoparamoeba spp. (Nspp) did not affect the in vitro respiratory burst response of leucocytes isolated from Atlantic salmon Salmo salar, rainbow trout Oncorhynchus mykiss and chinook salmon Oncorhynchus tshawytscha anterior kidneys (P > 0.05). Atlantic salmon and chinook salmon leucocytes pre-incubated with the parasites, however, responded to phorbol myristate...
Some Key Features of the Strong-Motion Data from the M 6.0 Parkfield, California, Earthquake of 28 September 2004
A. Shakal, H. Haddadi, V. Graizer, K. Lin, M. Huang
2006, Bulletin of the Seismological Society of America (96)
The 2004 Parkfield, California, earthquake was recorded by an extensive set of strong-motion instruments well positioned to record details of the motion in the near-fault region, where there has previously been very little recorded data. The strong-motion measurements obtained are highly varied, with significant variations occurring over only a few...
Atmospheric chemistry of a 33-34 hour old volcanic cloud from Hekla Volcano (Iceland): Insights from direct sampling and the application of chemical box modeling
William I. Rose Jr., G.A. Millard, T.A. Mather, D.E. Hunton, B. Anderson, C. Oppenheimer, B.F. Thornton, T.M. Gerlach, A.A. Viggiano, Y. Kondo, T.M. Miller, J.O. Ballenthin
2006, Journal of Geophysical Research D: Atmospheres (111)
On 28 February 2000, a volcanic cloud from Hekla volcano, Iceland, was serendipitously sampled by a DC-8 research aircraft during the SAGE III Ozone Loss and Validation Experiment (SOLVE I). It was encountered at night at 10.4 km above sea level (in the lower stratosphere) and 33-34 hours after emission....
Geodetic antenna calibration test in the Antarctic environment
A. Grejner-Brzezinska, E. Vazquez, L. Hothem
2006, Conference Paper, Proceedings of the Institute of Navigation - 19th International Technical Meeting of the Satellite Division, ION GNSS 2006
TransAntarctic Mountain DEFormation (TAMDEF) Monitoring Network is the NSF-sponsored OSU and USGS project, aimed at measuring crustal motion in the Transantarctic Mountains of Victoria Land using GPS carrier phase measurements. Station monumentation, antenna mounts, antenna types, and data processing strategies were optimized to achieve mm-level estimates for the rates of...
Crustal structure and tectonics of the northern part of the Southern Granulite Terrane, India
V.V. Rao, K. Sain, P.R. Reddy, Walter D. Mooney
2006, Earth and Planetary Science Letters (251) 90-103
Deep seismic reflection studies investigating the exposed Archean lower continental crust of the Southern Granulite Terrane, India, yield important constraints on the nature and evolution of the deep crust, including the formation and exhumation of granulites. Seismic reflection images along the Kuppam–Bhavani profile...
Factors influencing the incidence of cowbird parasitism of least Bell's vireos
B.L. Sharp, B.E. Kus
2006, Journal of Wildlife Management (70) 682-690
Least Bell's vireo (Vireo bellii pusillus) is a federally endangered subspecies of Bell's vireo subject to high levels of brood parasitism by brown-headed cowbirds (Molothrus ater). Brood parasitism greatly reduces the reproductive success of the vireo. We examined the relationship of vegetation structure surrounding nests and of activity near the...
Titan Radar Mapper observations from Cassini's T3 fly-by
C. Elachi, S. Wall, M. Janssen, E. Stofan, R. Lopes, Randolph L. Kirk, R. Lorenz, J. Lunine, F. Paganelli, Laurence A. Soderblom, C. Wood, L. Wye, H. Zebker, Y. Anderson, S. Ostro, M. Allison, R. Boehmer, P. Callahan, P. Encrenaz, E. Flamini, G. Francescetti, Y. Gim, G. Hamilton, S. Hensley, W. Johnson, K. Kelleher, D. Muhleman, G. Picardi, F. Posa, L. Roth, R. Seu, S. Shaffer, B. Stiles, S. Vetrella, R. West
2006, Nature (441) 709-713
Cassini's Titan Radar Mapper imaged the surface of Saturn's moon Titan on its February 2005 fly-by (denoted T3), collecting high-resolution synthetic-aperture radar and larger-scale radiometry and scatterometry data. These data provide the first definitive identification of impact craters on the surface of Titan, networks of fluvial channels and surficial dark...
Volcanic history and 40Ar/39Ar and 14C geochronology of Terceira Island, Azores, Portugal
Andrew T. Calvert, Richard B. Moore, John P. McGeehin, Antonio Rodrigues da Silva
2006, Journal of Volcanology and Geothermal Research (156) 103-115
Seven new 40Ar/39Ar and 23 new radiocarbon ages of eruptive units, in support of new geologic mapping, improve the known chronology of Middle to Late Pleistocene and Holocene volcanic activity on the island of Terceira, Azores and define an east-to-west progression in stratovolcano growth. The argon ages indicate that Cinco Picos...
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...
Effects of hurricanes Katrina and Rita on the chemistry of bottom sediments in Lake Pontchartrain, Louisiana, USA
P. C. Van Metre, A. J. Horowitz, B.J. Mahler, W.T. Foreman, C. C. Fuller, M.R. Burkhardt, K. A. Elrick, E. T. Furlong, S. C. Skrobialowski, J.J. Smith, J.T. Wilson, S.D. Zaugg
2006, Environmental Science & Technology (40) 6894-6902
The effects of Hurricanes Katrina and Rita and the subsequent unwatering of New Orleans, Louisiana, on the sediment chemistry of Lake Pontchartrain were evaluated by chemical analysis of samples of street mud and suspended and bottom sediments. The highest concentrations of urban-related elements and compounds (e.g., Pb,...
The effects of river impoundment and hatchery rearing on the migration behavior of juvenile steelhead in the Lower Snake River, Washington
J.M. Plumb, R.W. Perry, N.S. Adams, D.W. Rondorf
2006, North American Journal of Fisheries Management (26) 438-452
We used radiotelemetry to monitor the migration behavior of juvenile hatchery and wild steelhead Oncorhynchus mykiss as they migrated through Lower Granite Reservoir and Dam on the lower Snake River, Washington. From 1996 to 2001, we surgically implanted radio transmitters in 1,540 hatchery steelhead and 1,346 wild steelhead. For analysis,...
An agreement coefficient for image comparison
Lei Ji, Kevin Gallo
2006, Photogrammetric Engineering and Remote Sensing (72) 823-833
Combination of datasets acquired from different sensor systems is necessary to construct a long time-series dataset for remotely sensed land-surface variables. Assessment of the agreement of the data derived from various sources is an important issue in understanding the data continuity through the time-series. Some traditional measures, including correlation coefficient,...
A geochronological approach for cave evolution in the Cantabrian Coast (Pindal Cave, NW Spain)
M. Jimenez-Sanchez, J. L. Bischoff, H. Stoll, A. Aranburu
2006, Conference Paper, Zeitschrift fur Geomorphologie, Supplementband
Some of the oldest speleothems in the North Cantabrian Coast (Spain) are reported for the first time in this work. Pindal Cave is developed at 24 m above sea level, in a karstic massif reaching its highest surface in a marine terrace (rasa) located at 50-64 m above the present...
Small satellite multi mission C2 for maximum effect
E. Miller, O. Medina, C. R. Lane, A. Kirkham, W. Ivancic, B. Jones, R. Risty
2006, Conference Paper, European Space Agency, (Special Publication) ESA SP
This paper discusses US Air Force, US Army, US Navy, and NASA demonstrations based around the Virtual Mission Operations Center (VMOC) and its application in fielding a Multi Mission Satellite Operations Center (MMSOC) designed to integrate small satellites into the inherently tiered system environment of operations. The intent is to...
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...
Integration of the stratigraphic aspects of very large sea-floor databases using information processing
Clinton N. Jenkins, J. Flocks, M. Kulp
Rothwell R.G., editor(s)
2006, Geological Society Special Publication 229-240
Information-processing methods are described that integrate the stratigraphic aspects of large and diverse collections of sea-floor sample data. They efficiently convert common types of sea-floor data into database and GIS (geographical information system) tables, visual core logs, stratigraphic fence diagrams and sophisticated stratigraphic statistics. The input data are held in...
Are southern California's fragmented saltmarshes capable of sustaining endemic bird populations?
A.N. Powell
Greenberg R.Maldonado J.E.Droege S.McDonald M.V., editor(s)
2006, Studies in Avian Biology 198-204
Loss of coastal saltmarshes in southern California has been estimated at 75-90% since presettlement times. The remaining wetlands are mostly fragmented and degraded, and most frequently have harsh edges adjacent to urban landscapes. Non-migratory Belding's Savannah Sparrows (Passerculus sandwichensis beldingi) and Light-footed Clapper Rails (Rallus longirostris levipes) are endemic to...
Body-wave traveltime and amplitude shifts from asymptotic travelling wave coupling
F. Pollitz
2006, Geophysical Journal International (167) 705-736
We explore the sensitivity of finite-frequency body-wave traveltimes and amplitudes to perturbations in 3-D seismic velocity structure relative to a spherically symmetric model. Using the approach of coupled travelling wave theory, we consider the effect of a structural perturbation on an isolated portion of the seismogram. By convolving the spectrum...
The future of imaging spectroscopy - Prospective technologies and applications
M.E. Schaepman, R.O. Green, S.G. Ungar, B. Curtiss, J. Boardman, A.J. Plaza, B.-C. Gao, S. Ustin, R. Kokaly, J.R. Miller, S. Jacquemoud, E. Ben-Dor, R. Clark, C. Davis, J. Dozier, D.G. Goodenough, D. Roberts, G. Swayze, E.J. Milton, Alexander F.H. Goetz
2006, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
Spectroscopy has existed for more than three centuries now. Nonetheless, significant scientific advances have been achieved. We discuss the history of spectroscopy in relation to emerging technologies and applications. Advanced focal plane arrays, optical design, and intelligent on-board logic are prime prospective technologies. Scalable approaches in pre-processing of imaging spectrometer...
Effect of tree line advance on carbon storage in NW Alaska
M. Wilmking, J. Harden, K. Tape
2006, Journal of Geophysical Research G: Biogeosciences (111)
We investigated the size, distribution, and temporal dynamics of ecosystem carbon (C) pools in an area of recent tree line advance, northwest Alaska. Repeat aerial photographs show forest cover increased ???10% in our study area since 1949. We sampled C pools of four principal ecosystem types, tussock tundra, shrub tundra,...
Evaluation of larval sucker drift ecology at two proposed irrigation pump sites on the Williamson River
T.J. Tyler, C.M. Ellsworth, S. P. VanderKooi, R.S. Shively
2006, Report
n/a...
The rocks of Gusev Crater as viewed by the Mini-TES instrument
S. W. Ruff, P. R. Christensen, D.L. Blaney, W. H. Farrand, J. R. Johnson, J.R. Michalski, J.E. Moersch, S.P. Wright, S. W. Squyres
2006, Journal of Geophysical Research E: Planets (111)
The Miniature Thermal Emission Spectrometer (Mini-TES) on board the Mars Exploration Rover Spirit is part of a payload designed to investigate whether a lake once existed in Gusev Crater. Mini-TES has observed hundreds of rocks along the rover's traverse into the Columbia Hills, yielding information on their distribution, bulk mineralogy,...
Testing of stack-unit/aquifer sensitivity analysis using contaminant plume distribution in the subsurface of Savannah River Site, South Carolina, USA
J.M. Rine, J.M. Shafer, E. Covington, R. C. Berg
2006, Hydrogeology Journal (14) 1620-1634
Published information on the correlation and field-testing of the technique of stack-unit/aquifer sensitivity mapping with documented subsurface contaminant plumes is rare. The inherent characteristic of stack-unit mapping, which makes it a superior technique to other analyses that amalgamate data, is the ability to deconstruct the sensitivity analysis on a unit-by-unit...
