Neotectonics of the offshore Oak Ridge fault near Ventura, southern California
M. A. Fisher, H. Gary Greene, W. R. Normark, R. W. Sliter
2005, Bulletin of the Seismological Society of America (95) 739-744
The Oak Ridge fault is a large-offset, south-dipping reverse fault that forms the south boundary of the Ventura Basin in southern California. Previous research indicates that the Oak Ridge fault south of the town of Ventura has been inactive since 200-400 ka ago and that the fault tip is buried...
Analyzing indicators of stream health for Minnesota streams
U. Singh, M. Kocian, B. Wilson, A. Bolton, J. Nieber, B. Vondracek, J. Perry, J. Magner
2005, Conference Paper, Proceedings of the 3rd Conference on Watershed Management to Meet Water Quality Standards and Emerging TMDL
Recent research has emphasized the importance of using physical, chemical, and biological indicators of stream health for diagnosing impaired watersheds and their receiving water bodies. A multidisciplinary team at the University of Minnesota is carrying out research to develop a stream classification system for Total Maximum Daily Load (TMDL) assessment....
Inland-directed base surge generated by the explosive interaction of pyroclastic flows and seawater at Soufrière Hills volcano, Montserrat
Marie Edmonds, Richard A. Herd
2005, Geology (33) 245-248
The largest and most intense lava-dome collapse during the eruption of Soufrière Hills volcano, Montserrat, 1995–2004, occurred 12–13 July 2003. The dome collapse involved around 200 × 106 m3 of material and was associated with a phenomenon previously unknown at this volcano. Large pyroclastic flows at the peak of the dome collapse...
Lake Michigan wetlands: classification, concerns, and management opportunities
Douglas A. Wilcox
T. Edsall, M. Munawar, editor(s)
2005, Book chapter, State of Lake Michigan: Ecology, Health, and Management
The wetlands that border Lake Michigan are an extremely important component of the lake ecosystem. In this paper, I will review the status of wetland classifications used for Lake Michigan and the other Great Lakes, as well as the major management concerns and opportunities presented by Lake Michigan wetlands....
Controlling for anthropogenically induced atmospheric variation in stable carbon isotope studies
E.S. Long, R.A. Sweitzer, Duane R. Diefenbach, M. Ben-David
2005, Oecologia (146) 148-156
Increased use of stable isotope analysis to examine food-web dynamics, migration, transfer of nutrients, and behavior will likely result in expansion of stable isotope studies investigating human-induced global changes. Recent elevation of atmospheric CO2 concentration, related primarily to fossil fuel combustion, has reduced atmospheric CO2 ??13C (13C/12C), and this change...
The onset of metamorphism in ordinary and carbonaceous chondrites
Jeffrey N. Grossman, Adrian J. Brearley
2005, Meteoritics and Planetary Science (40) 87-122
Ordinary and carbonaceous chondrites of the lowest petrologic types were surveyed by X-ray mapping techniques. A variety of metamorphic effects were noted and subjected to detailed analysis using electron microprobe, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and cathodoluminescence (CL) methods. The distribution of Cr in FeO-rich olivine systematically...
Hydratools, a MATLAB® based data processing package for Sontek Hydra data
M. Martini, F. L. Lightsom, C. R. Sherwood, J. Xu, J.R. Lacy, A. Ramsey, R. Horwitz
2005, Conference Paper, Proceedings of the IEEE Working Conference on Current Measurement Technology
The U.S. Geological Survey (USGS) has developed a set of MATLAB tools to process and convert data collected by Sontek Hydra instruments to netCDF, which is a format used by the USGS to process and archive oceanographic time-series data. The USGS makes high-resolution current measurements within 1.5 meters of the...
Real-time seismic monitoring and functionality assessment of a building
M. Çelebi
Kundu T., editor(s)
2005, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
This paper presents recent developments and approaches (using GPS technology and real-time double-integration) to obtain displacements and, in turn, drift ratios, in real-time or near real-time to meet the needs of the engineering and user community in seismic monitoring and assessing the functionality and damage condition of structures. Drift ratios...
Part 1: Vadose-zone column studies of toluene (enhanced bioremediation) in a shallow unconfined aquifer
J.A. Tindall, M.J. Friedel, R.J. Szmajter, S.M. Cuffin
2005, Water, Air, & Soil Pollution (168) 325-357
The objectives of the laboratory study described in this paper were (1) to determine the effectiveness of four nutrient solutions and a control in stimulating the microbial degradation of toluene in the unsaturated zone as an alternative to bioremediation methodologies such as air sparging, in situ vitrification, or others...
Ocean science: Radiocarbon variability in the western North Atlantic during the last deglaciation
L.F. Robinson, J.F. Adkins, L.D. Keigwin, J. Southon, D. P. Fernandez, S.-L. Wang, D.S. Scheirer
2005, Science (310) 1469-1473
We present a detailed history of glacial to Holocene radiocarbon in the deep western North Atlantic from deep-sea corals and paired benthic-planktonic foraminifera. The deglaciation is marked by switches between radiocarbon-enriched and -depleted waters, leading to large radiocarbon gradients in the water column. These changes played an important role in...
Suspended sediment fluxes in a tidal wetland: Measurement, controlling factors, and error analysis
N. K. Ganju, D. H. Schoellhamer, B.A. Bergamaschi
2005, Estuaries (28) 812-822
Suspended sediment fluxes to and from tidal wetlands are of increasing concern because of habitat restoration efforts, wetland sustainability as sea level rises, and potential contaminant accumulation. We measured water and sediment fluxes through two channels on Browns Island, at the landward end of San Francisco Bay, United States, to...
SLC-off Landsat-7 ETM+ reflective band radiometric calibration
B. L. Markham, J. A. Barsi, K. J. Thome, J. L. Barker, P. L. Scaramuzza, D. L. Helder
Butler J.J., editor(s)
2005, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
Since May 31, 2003, when the scan line corrector (SLC) on the Landsat-7 ETM+ failed, the primary foci of Landsat-7 ETM+ analyses have been on understanding and attempting to fix the problem and later on developing composited products to mitigate the problem. In the meantime, the Image Assessment System personnel...
Calibration of numerical models for small debris flows in Yosemite Valley, California, USA
P. Bertolo, G. F. Wieczorek
2005, Natural Hazards and Earth System Sciences (5) 993-1001
This study compares documented debris flow runout distances with numerical simulations in the Yosemite Valley of California, USA, where about 15% of historical events of slope instability can be classified as debris flows and debris slides (Wieczorek and Snyder, 2004). To model debris flows in the Yosemite Valley, we selected...
Variation in fire regimes of the rocky mountains: Implications for avian communities and fire management
V.A. Saab, Hugo D. W. Powell, N.B. Kotliar, K.R. Newlon
2005, Conference Paper, Studies in Avian Biology
Information about avian responses to fire in the U.S. Rocky Mountains is based solely on studies of crown fires. However, fire management in this region is based primarily on studies of low-elevation ponderosa pine (Pinus ponderosa) forests maintained largely by frequent understory fires. In contrast to both of these trends,...
Structure and stress state of Hawaiian island basalts penetrated by the Hawaii Scientific Drilling Project deep core hole
R. H. Morin, R.H. Wilkens
2005, Journal of Geophysical Research B: Solid Earth (110) 1-8
As part of the Hawaii Scientific Drilling Project (HSDP), an exploratory hole was drilled in 1993 to a depth of 1056 meters below sea level (mbsl) and a deeper hole was drilled to 3098 mbsl in 1999. A set of geophysical well logs was obtained in the deeper hole that...
Isotopic composition of Antarctic Dry Valley nitrate: Implications for NOy sources and cycling in Antarctica
G. Michalski, James G. Bockheim, C. Kendall, M. Thiemens
2005, Geophysical Research Letters (32) 1-4
Nitrates minerals from the Dry Valleys of Antarctica have been analyzed for their oxygen and nitrogen isotopic compositions. The 15N was depleted with δ15N values ranging from −9.5 to −26.2‰, whereas the 17O and 18O isotopes were highly enriched (with excess 17O) with δ18O values spanning 62–76‰ and Δ17O values...
Variability in colony attendance of crevice-nesting horned puffins: Implications for population monitoring
A.M.A. Harding, John F. Piatt, G.V. Byrd, Scott A. Hatch, N. B. Konyukhov, E.U. Golubova, J.C. Williams
2005, Journal of Wildlife Management (69) 1279-1296
It is difficult to survey crevice-nesting seabirds because nest-sites are hard to identify and count, and the number of adult birds attending a colony can be extremely variable within and between days. There is no standardized method for surveying crevice-nesting horned puffins (Fratercula corniculata), and consequently little is known...
Heat as a tracer to estimate dissolved organic carbon flux from a restored wetland
K.R. Burow, J. Constantz, R. Fujii
2005, Ground Water (43) 545-556
Heat was used as a natural tracer to characterize shallow ground water flow beneath a complex wetland system. Hydrogeologic data were combined with measured vertical temperature profiles to constrain a series of two‐dimensional, transient simulations of ground water flow and heat transport using the model code...
Impact of millennial-scale Holocene climate variability on eastern North American terrestrial ecosystems: Pollen-based climatic reconstruction
Debra A. Willard, C.E. Bernhardt, D.A. Korejwo, S.R. Meyers
2005, Global and Planetary Change (47) 17-35
We present paleoclimatic evidence for a series of Holocene millennial-scale cool intervals in eastern North America that occurred every ???1400 years and lasted ???300-500 years, based on pollen data from Chesapeake Bay in the mid-Atlantic region of the United States. The cool events are indicated by significant decreases in pine...
Quarantine of Aeromonas salmonicida-harboring ebonyshell mussels (Fusconaia ebena) prevents transmission of the pathogen to brook trout (Salvelinus fontinalis)
Clifford E. Starliper
2005, Journal of Shellfish Research (24) 573-578
Furunculosis, caused by the bacterium Aeromonas salmonicida, was artificially induced in brook trout (Salvelinus fontinalis) in an experimental tank. Ebonyshells (Fusconaia ebena) were placed to cohabit with these fish to acquire the pathogen through siphoning. After 2 wk of cohabitation, 10 of the mussels were assayed by bacterial...
Analysis of vegetation distribution in Interior Alaska and sensitivity to climate change using a logistic regression approach
M.P. Calef, A. D. McGuire, H.E. Epstein, T.S. Rupp, H.H. Shugart
2005, Journal of Biogeography (32) 863-878
Aim: To understand drivers of vegetation type distribution and sensitivity to climate change. Location: Interior Alaska. Methods: A logistic regression model was developed that predicts the potential equilibrium distribution of four major vegetation types: tundra, deciduous forest, black spruce forest and white spruce forest based on elevation, aspect, slope, drainage...
Home range and habitat use by Great Horned Owls (Bubo virginianus) in Southern California
J.R. Bennett, P.H. Bloom
2005, Journal of Raptor Research (39) 119-126
Great Horned Owls (Bubo virginianus) are a common, widespread species that can be found in a variety of habitats across most of North America, but little is known about their space and habitat requirements. Using radiotelemetry, location data were collected on nine male and five female Great Horned Owls to...
Electroshocking and PIT tagging of juvenile Atlantic salmon: Are there interactive effects on growth and survival?
Douglas B. Sigourney, G.E. Horton, T.L. Dubreuil, A.M. Varaday, B. H. Letcher
2005, North American Journal of Fisheries Management (25) 1016-1021
Electroshocking and tagging of fish with passive integrated transponder (PIT) tags are two commonly used methods for conducting mark-recapture studies in freshwater environments and are frequently used in combination. We conducted an experiment to test for the effects of electroshocking, tagging, and a combination of electroshocking plus tagging on the...
Development of a solenoid pumped in situ zinc analyzer for environmental monitoring
T.P. Chapin, R. B. Wanty
2005, Analytica Chimica Acta (543) 199-208
A battery powered submersible chemical analyzer, the Zn-DigiScan (Zn Digital Submersible Chemical Analyzer), has been developed for near real-time, in situ monitoring of zinc in aquatic systems. Microprocessor controlled solenoid pumps propel sample and carrier through an anion exchange column to separate zinc from interferences, add colorimetric reagents, and propel...
Suburban wildlife: Lessons, challenges, and opportunities
S. DeStefano, R.D. Deblinger, C. Miller
2005, Urban Ecosystems (8) 131-137
The United States, as well as most developed and many developing nations worldwide, is becoming increasingly urban and suburban.Although urban, suburban, and commercial development account for less than one percent to just over 20% of land use among states, 50-90% of the residents of those states can be classified as...
