Developing spatially explicit footprints of plausible land-use scenarios in the Santa Cruz Watershed, Arizona and Sonora
Laura M. Norman, Mark Feller, Miguel L. Villarreal
2012, Landscape and Urban Planning (107) 225-235
The SLEUTH urban growth model is applied to a binational dryland watershed to envision and evaluate plausible future scenarios of land use change into the year 2050. Our objective was to create a suite of geospatial footprints portraying potential land use change that can be used to aid binational decision-makers...
Golden Gate Bridge response: a study with low-amplitude data from three earthquakes
Mehmet Çelebi
2012, Earthquake Spectra (28) 487-510
The dynamic response of the Golden Gate Bridge, located north of San Francisco, CA, has been studied previously using ambient vibration data and finite element models. Since permanent seismic instrumentation was installed in 1993, only small earthquakes that originated at distances varying between ~11 to 122 km have been recorded....
A terrestrial lidar-based workflow for determining three-dimensional slip vectors and associated uncertainties
Peter O. Gold, Eric Cowgill, Oliver Kreylos, Ryan D. Gold
2012, Geosphere (8) 431-442
Three-dimensional (3D) slip vectors recorded by displaced landforms are difficult to constrain across complex fault zones, and the uncertainties associated with such measurements become increasingly challenging to assess as landforms degrade over time. We approach this problem from a remote sensing perspective by using terrestrial laser scanning (TLS) and 3D...
Abiotic and biotic controls of cryptobenthic fish assemblages across a Caribbean seascape
A.R. Harborne, H.L. Jelks, W. F. Smith-Vaniz, L.A. Rocha
2012, Coral Reefs (31) 977-990
The majority of fish studies on coral reefs consider only non-cryptic species and, despite their functional importance, data on cryptic species are scarce. This study investigates inter-habitat variation in Caribbean cryptobenthic fishes by re-analysing a comprehensive data set from 58 rotenone stations around Buck Island, U.S. Virgin Islands. Boosted regression...
Constraints on the timing of Co-Cu ± Au mineralization in the Blackbird district, Idaho, using SHRIMP U-Pb ages of monazite and xenotime plus zircon ages of related Mesoproterozoic orthogneisses and metasedimentary rocks
John N. Aleinikoff, John F. Slack, Karen Lund, Karl V. Evans, C. Mark Fanning, Frank K. Mazdab, Joseph L. Wooden, Renee M. Pillers
2012, Economic Geology (107) 1143-1175
The Blackbird district, east-central Idaho, contains the largest known Co reserves in the United States. The origin of strata-hosted Co-Cu ± Au mineralization at Blackbird has been a matter of controversy for decades. In order to differentiate among possible genetic models for the deposits, including various combinations of volcanic, sedimentary,...
Strontium isotope systematics of mixing groundwater and oil-field brine at Goose Lake in northeastern Montana, USA
Zell E. Peterman, Joanna N. Thamke, Kiyoto Futa, Todd Preston
2012, Applied Geochemistry (27) 2403-2408
Groundwater, surface water, and soil in the Goose Lake oil field in northeastern Montana have been affected by Cl−-rich oil-field brines during long-term petroleum production. Ongoing multidisciplinary geochemical and geophysical studies have identified the degree and local extent of interaction between brine and groundwater. Fourteen samples representing groundwater, surface water,...
Explaining reported puma-related behaviors and behavioral intentions among northern Arizona residents
David J. Mattson, Elizabeth J. Ruther
2012, Human Dimensions of Wildlife: An International Journal (17) 91-111
Management of pumas in the American West is typified by conflict among stakeholders plausibly rooted in life experiences and worldviews. We used a mail questionnaire to assess demographics, nature-views, puma-related life experiences and behaviors, and support for puma-related policies among residents of northern Arizona. Data from the questionnaire (n = 693 respondents)...
Anisotropic path modeling to assess pedestrian-evacuation potential from Cascadia-related tsunamis in the US Pacific Northwest
Nathan J. Wood, Mathew C. Schmidtlein
2012, Natural Hazards (62) 275-300
Recent disasters highlight the threat that tsunamis pose to coastal communities. When developing tsunami-education efforts and vertical-evacuation strategies, emergency managers need to understand how much time it could take for a coastal population to reach higher ground before tsunami waves arrive. To improve efforts to model pedestrian evacuations from tsunamis,...
Bathythermal habitat use by strains of Great Lakes- and Finger Lakes-origin lake trout in Lake Huron after a change in prey fish abundance and composition
Roger A. Bergstedt, Ray L. Argyle, Charles C. Krueger, William W. Taylor
2012, Transactions of the American Fisheries Society (141) 263-274
A study conducted in Lake Huron during October 1998–June 2001 found that strains of Great Lakes-origin (GLO) lake trout Salvelinus namaycush occupied significantly higher temperatures than did Finger Lakes-origin (FLO; New York) lake trout based on data from archival (or data storage) telemetry tags that recorded only temperature. During 2002...
Impact disruption and recovery of the deep subsurface biosphere
Charles S. Cockell, Mary A. Voytek, Aaron L. Gronstal, Kai Finster, Julie D. Kirshtein, Kieren Howard, Joachim Reitner, Gregory S. Gohn, Ward E. Sanford, J. Wright Horton Jr., Jens Kallmeyer, Laura Kelly, David S. Powars
2012, Astrobiology (12) 231-246
Although a large fraction of the world's biomass resides in the subsurface, there has been no study of the effects of catastrophic disturbance on the deep biosphere and the rate of its subsequent recovery. We carried out an investigation of the microbiology of a 1.76 km drill core obtained from the...
Landsat-7 ETM+: 12 years on-orbit reflective-band radiometric performance
B. L. Markham, M.O. Haque, J. A. Barsi, E. Micijevic, D. L. Helder, K. J. Thome, David Aaron, J. S. Czapla-Myers
2012, IEEE Transactions on Geoscience and Remote Sensing (50) 2056-2062
The Landsat-7 ETM+ sensor has been operating on orbit for more than 12 years, and characterizations of its performance have been ongoing over this period. In general, the radiometric performance of the instrument has been remarkably stable: 1) noise performance has degraded by 2% or less overall, with a few...
ASTER satellite observations for international disaster management
K. A. Duda, M. Abrams
2012, Proceedings of IEEE (100) 2798-2811
When lives are threatened or lost due to catastrophic disasters, and when massive financial impacts are experienced, international emergency response teams rapidly mobilize to provide urgently required support. Satellite observations of affected areas often provide essential insight into the magnitude and details of the impacts. The large cost and high...
Airborne LiDAR analysis and geochronology of faulted glacial moraines in the Tahoe-Sierra frontal fault zone reveal substantial seismic hazards in the Lake Tahoe region, California-Nevada USA
James F. Howle, Gerald W. Bawden, Richard A. Schweickert, Robert C. Finkel, Lewis E. Hunter, Ronn S. Rose, Brent von Twistern
2012, GSA Bulletin (124) 1087-1101
We integrated high-resolution bare-earth airborne light detection and ranging (LiDAR) imagery with field observations and modern geochronology to characterize the Tahoe-Sierra frontal fault zone, which forms the neotectonic boundary between the Sierra Nevada and the Basin and Range Province west of Lake Tahoe. The LiDAR imagery clearly delineates active normal...
Identifying grasslands suitable for cellulosic feedstock crops in the Greater Platte River Basin: dynamic modeling of ecosystem performance with 250 m eMODIS
Yingxin Gu, Stephen P. Boyte, Bruce K. Wylie, Larry L. Tieszen
2012, GCB Bioenergy (4) 96-106
This study dynamically monitors ecosystem performance (EP) to identify grasslands potentially suitable for cellulosic feedstock crops (e.g., switchgrass) within the Greater Platte River Basin (GPRB). We computed grassland site potential and EP anomalies using 9-year (2000–2008) time series of 250 m expedited moderate resolution imaging spectroradiometer Normalized Difference Vegetation Index...
Complementarity of ResourceSat-1 AWiFS and Landsat TM/ETM+ sensors
S.N. Goward, G. Chander, M. Pagnutti, A. Marx, R. Ryan, N. Thomas, R. Tetrault
2012, Remote Sensing of Environment (123) 41-56
Considerable interest has been given to forming an international collaboration to develop a virtual moderate spatial resolution land observation constellation through aggregation of data sets from comparable national observatories such as the US Landsat, the Indian ResourceSat and related systems. This study explores the complementarity of India's ResourceSat-1 Advanced Wide...
Estimating aboveground biomass in interior Alaska with Landsat data and field measurements
Lei Ji, Bruce K. Wylie, Dana R. Nossov, Birgit E. Peterson, Mark P. Waldrop, Jack W. McFarland, Jennifer R. Rover, Teresa N. Hollingsworth
2012, International Journal of Applied Earth Observation and Geoinformation (18) 451-461
Terrestrial plant biomass is a key biophysical parameter required for understanding ecological systems in Alaska. An accurate estimation of biomass at a regional scale provides an important data input for ecological modeling in this region. In this study, we created an aboveground biomass (AGB) map at 30-m resolution for the...
Developing ShakeCast statistical fragility analysis framework for rapid post-earthquake assessment
K.-W. Lin, D.J. Wald
2012, Conference Paper, Proceedings of the 15th World Conference on Earthquake Engineering (15WCEE), Lisbon, Portugal, September 24-28
When an earthquake occurs, the U. S. Geological Survey (USGS) ShakeMap estimates the extent of potentially damaging shaking and provides overall information regarding the affected areas. The USGS ShakeCast system is a freely-available, post-earthquake situational awareness application that automatically retrieves earthquake shaking data from ShakeMap, compares intensity measures against users’...
A graphical method to evaluate predominant geochemical processes occurring in groundwater systems for radiocarbon dating
Liang-Feng Han, Niel Plummer, Pradeep Aggarwal
2012, Chemical Geology (318-319) 88-112
A graphical method is described for identifying geochemical reactions needed in the interpretation of radiocarbon age in groundwater systems. Graphs are constructed by plotting the measured 14C, δ13C, and concentration of dissolved inorganic carbon and are interpreted according to specific criteria to recognize water samples that are consistent with a...
Short-term impacts of a 4-lane highway on black bears in eastern North Carolina
Frank T. van Manen, Matthew F. McCollister, Jeremy M. Nicholson, Laura M. Thompson, Jason L. Kindall, Mark D. Jones
2012, Wildlife Monographs (181) 1-35
Among numerous anthropogenic impacts on terrestrial landscapes, expanding transportation networks represent one of the primary challenges to wildlife conservation worldwide. Larger mammals may be particularly vulnerable because of typically low densities, low reproductive rates, and extensive movements. Although numerous studies have been conducted to document impacts of road networks on...
Relationship between mid-water trawling effort and catch composition uncertainty in two large lakes (Huron and Michigan) dominated by alosines, osmerids, and coregonines
David M. Warner, Randall M. Claramunt, Jeffrey S. Schaeffer, Daniel L. Yule, Tom R. Hrabik, Bernie Peintka, Lars G. Rudstam, Jeffrey D. Holuszko, Timothy P. O’Brien
2012, Fisheries Research (123-124) 62-69
Because it is not possible to identify species with echosounders alone, trawling is widely used as a method for collecting species and size composition data for allocating acoustic fish density estimates to species or size groups. In the Laurentian Great Lakes, data from midwater trawls are commonly used for such...
Holocene behavior of the Brigham City segment: implications for forecasting the next large-magnitude earthquake on the Wasatch fault zone, Utah
Stephen F. Personius, Christopher B. DuRoss, Anthony J. Crone
2012, Bulletin of the Seismological Society of America (102) 2265-2281
The Brigham City segment (BCS), the northernmost Holocene‐active segment of the Wasatch fault zone (WFZ), is considered a likely location for the next big earthquake in northern Utah. We refine the timing of the last four surface‐rupturing (~Mw 7) earthquakes at several sites near Brigham City (BE1, 2430±250; BE2, 3490±180;...
Physical controls and predictability of stream hyporheic flow evaluated with a multiscale model
Susa H. Stonedahl, Judson W. Harvey, Joel Detty, Antoine Aubeneau, Aaron I. Packman
2012, Water Resources Research (48)
Improved predictions of hyporheic exchange based on easily measured physical variables are needed to improve assessment of solute transport and reaction processes in watersheds. Here we compare physically based model predictions for an Indiana stream with stream tracer results interpreted using the Transient Storage Model (TSM). We parameterized the physically...
Determination of nonylphenol isomers in landfill leachate and municipal wastewater using steam distillation extraction coupled with comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry
Caixiang Zhang, Robert P. Eganhouse, James Pontolillo, Isabelle M. Cozzarelli, Yanxin Wang
2012, Journal of Chromatography A (1230) 110-116
4-Nonylphenols (4-NPs) are known endocrine disruptors and by-products of the microbial degradation of nonylphenol polyethoxylate surfactants. One of the challenges to understanding the toxic effects of nonylphenols is the large number of isomers that may exist in environmental samples. In order to attribute toxic effects to specific compounds, a method...
Calibration and intercomparison of acetic acid measurements using proton transfer reaction mass spectrometry (PTR-MS)
K.B. Haase, W.C. Keene, A.A.P. Pszenny, H.R. Mayne, R.W. Talbot, B.C. Sive
2012, Atmospheric Measurement Techniques (5) 4635-4665
Acetic acid is one of the most abundant organic acids in the ambient atmosphere, with maximum mixing ratios reaching into the tens of parts per billion by volume (ppbv) range. The identities and associated magnitudes of the major sources and sinks for acetic acid are poorly characterized, due in part...
Modeling species invasions in Ecopath with Ecosim: an evaluation using Laurentian Great Lakes models
Brian J. Langseth, Mark Rogers, Hongyan Zhang
2012, Ecological Modelling (247) 251-261
Invasive species affect the structure and processes of ecosystems they invade. Invasive species have been particularly relevant to the Laurentian Great Lakes, where they have played a part in both historical and recent changes to Great Lakes food webs and the fisheries supported therein. There is increased interest in understanding...
