Using luminescence dating of coarse matrix material to estimate the slip rate of the Astaneh fault, Iran
M. Rizza, Shannon A. Mahan, J.-F. Ritz, H. Nazari, J. Hollingsworth, R. Salamati
2011, Quaternary Geochronology (6) 390-406
In this paper, we present optically and infrared stimulated luminescence (OSL and IRSL) ages for four samples from alluvial fan surfaces in the Astaneh Valley. This valley is located in the north-east part of the Alborz range in Iran. Our morphologic interpretations recognize at least three generations of fans in the study area,...
Spatial modeling for groundwater arsenic levels in North Carolina
D. Kim, M.L. Miranda, J. Tootoo, P. Bradley, A.E. Gelfand
2011, Environmental Science & Technology (45) 4824-4831
To examine environmental and geologic determinants of arsenic in groundwater, detailed geologic data were integrated with well water arsenic concentration data and well construction data for 471 private wells in Orange County, NC, via a geographic information system. For the statistical analysis, the geologic units were simplified into four generalized...
Whole-edifice ice volume change A.D. 1970 to 2007/2008 at Mount Rainier, Washington, based on LiDAR surveying
T. W. Sisson, J.E. Robinson, D.D. Swinney
2011, Geology (39) 639-642
Net changes in thickness and volume of glacial ice and perennial snow at Mount Rainier, Washington State, have been mapped over the entire edifice by differencing between a highresolution LiDAR (light detection and ranging) topographic survey of September-October 2007/2008 and the 10 m lateral resolution U.S. Geological Survey digital elevation...
Inter-specific coral chimerism: Genetically distinct multicellular structures associated with tissue loss in Montipora capitata
Thierry M. Work, Zac H. Forsman, Zoltan Szabo, Teresa D. Lewis, Greta S. Aeby, Robert J. Toonen
2011, PLoS ONE (6)
Montipora white syndrome (MWS) results in tissue-loss that is often lethal to Montipora capitata, a major reef building coral that is abundant and dominant in the Hawai'ian Archipelago. Within some MWS-affected colonies in Kane'ohe Bay, Oahu, Hawai'i, we saw unusual motile multicellular structures within gastrovascular canals (hereafter referred to as invasive gastrovascular...
Monitoring duration and extent of storm-surge and flooding in Western Coastal Louisiana marshes with Envisat ASAR data
Elijah Ramsey III, Zhong Lu, Yukihiro Suzuoki, Amina Rangoonwala, Dirk Werle
2011, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (4) 387-399
Inundation maps of coastal marshes in western Louisiana were created with multitemporal Envisat Advanced Synthetic Aperture (ASAR) scenes collected before and during the three months after Hurricane Rita landfall in September 2005. Corroborated by inland water-levels, 7 days after landfall, 48% of coastal estuarine and palustrine marshes remained inundated by...
Arctic foxes, lemmings, and canada goose nest survival at cape Churchill, Manitoba
M.E. Reiter, D. E. Andersen
2011, Wilson Journal of Ornithology (123) 266-276
We examined factors influencing Canada Goose (Branta canadensis interior) annual nest success, including the relative abundance of collared lemmings (Dicrostonyx richardsoni), arctic fox (Alopex lagopus) den occupancy, nest density, and spring phenology using data collected during annual Canada Goose breeding area surveys at Cape Churchill, Manitoba. Nest...
Using normalized difference vegetation index to estimate carbon fluxes from small rotationally grazed pastures
R.H. Skinner, B.K. Wylie, T.G. Gilmanov
2011, Agronomy Journal (103) 972-979
Satellite-based normalized difference vegetation index (NDVI) data have been extensively used for estimating gross primary productivity (GPP) and yield of grazing lands throughout the world. However, the usefulness of satellite-based images for monitoring rotationally-grazed pastures in the northeastern United States might be limited because paddock size is often smaller than...
A coral Sr/Ca calibration and replication study of two massive corals from the Gulf of Mexico
Kristine L. DeLong, Jennifer A. Flannery, Christopher R. Maupin, Richard Z. Poore, Terrence M. Quinn
2011, Palaeogeography, Palaeoclimatology, Palaeoecology (307) 117-128
This study examined the variations in the ratio of strontium-to-calcium (Sr/Ca) for two Atlantic corals (Montastraea faveolata and Siderastrea siderea) from the Dry Tortugas National Park (centered on 24.7°N, 82.8°W) in the Gulf of Mexico. Cores from coral colonies in close proximity (10s of meters) and with the same environmental conditions (i.e.,...
High-resolution three-dimensional imaging and analysis of rock falls in Yosemite valley, California
Gregory M. Stock, Gerald W. Bawden, J.K. Green, E. Hanson, G. Downing, Brian D. Collins, Sandra Bond, M. Leslar
2011, Geosphere (7) 573-581
We present quantitative analyses of recent large rock falls in Yosemite Valley, California, using integrated high-resolution imaging techniques. Rock falls commonly occur from the glacially sculpted granitic walls of Yosemite Valley, modifying this iconic landscape but also posing significant potential hazards and risks. Two large rock falls occurred from the...
Migrating swarms of brittle-failure earthquakes in the lower crust beneath Mammoth Mountain, California
D.R. Shelly, D.P. Hill
2011, Geophysical Research Letters (38)
Brittle-failure earthquakes in the lower crust, where high pressures and temperatures would typically promote ductile deformation, are relatively rare but occasionally observed beneath active volcanic centers. Where they occur, these earthquakes provide a rare opportunity to observe volcanic processes in the lower crust, such as fluid injection and migration, which...
Location and agricultural practices influence spring use of harvested cornfields by cranes and geese in Nebraska
Michael J. Anteau, Mark H. Sherfy, A.A. Bishop
2011, Journal of Wildlife Management (75) 1004-1011
Millions of ducks, geese, and sandhill cranes (Grus canadensis; hereafter cranes) stop in the Central Platte River Valley (CPRV) of Nebraska to store nutrients for migration and reproduction by consuming corn remaining in fields after harvest. We examined factors that influence use of cornfields by cranes and geese (all mid‐continent...
Age and tectonic setting of the Mesozoic McCoy Mountains Formation in western Arizona, USA
J.E. Spencer, S.M. Richard, G. E. Gehrels, J.D. Gleason, W.R. Dickinson
2011, Geological Society of America Bulletin (123) 1258-1274
The McCoy Mountains Formation consists of Upper Jurassic to Upper Cretaceous siltstone, sandstone, and conglomerate exposed in an east-west–trending belt in southwestern Arizona and southeastern California. At least three different tectonic settings have been proposed for McCoy deposition, and multiple tectonic settings are likely over the ∼80 m.y. age range...
An analytical framework to assist decision makers in the use of forest ecosystem model predictions
Guy R. Larocque, Jagtar S. Bhatti, J.C. Ascough, J. Liu, N. Luckai, D. Mailly, L. Archambault, Andrew M. Gordon
2011, Environmental Modelling and Software (26) 280-288
The predictions from most forest ecosystem models originate from deterministic simulations. However, few evaluation exercises for model outputs are performed by either model developers or users. This issue has important consequences for decision makers using these models to develop natural resource management policies, as they cannot evaluate the extent to...
Field verification of stable perched groundwater in layered bedrock uplands
J.T. Carter, M.B. Gotkowitz, Marilyn P. Anderson
2011, Ground Water (49) 383-392
Data substantiating perched conditions in layered bedrock uplands are rare and have not been widely reported. Field observations in layered sedimentary bedrock in southwestern Wisconsin, USA, provide evidence of a stable, laterally extensive perched aquifer. Data from a densely instrumented field site show a perched aquifer in shallow dolomite, underlain...
Migration and wintering areas of glaucous-winged Gulls from south-central Alaska
Scott A. Hatch, V.A. Gill, D.M. Mulcahy
2011, Condor (113) 340-351
We used satellite telemetry to investigate the migration patterns and wintering areas of Glaucous-winged Gulls (Larus glaucescens) from Middleton Island, Alaska, where this species' population increased tenfold from the 1970s to the 1990s. Fall migration spanned 11 weeks, including numerous stopovers en route, apparently for feeding. Spring migration from wintering...
Near-field hazard assessment of March 11, 2011 Japan Tsunami sources inferred from different methods
Y. Wei, V.V. Titov, A. Newman, G. Hayes, Liujuan Tang, C. Chamberlin
2011, Conference Paper, OCEANS'11 - MTS/IEEE Kona, Program Book
Tsunami source is the origin of the subsequent transoceanic water waves, and thus the most critical component in modern tsunami forecast methodology. Although impractical to be quantified directly, a tsunami source can be estimated by different methods based on a variety of measurements provided by deep-ocean tsunameters, seismometers, GPS, and...
Exchange of groundwater and surface-water mediated by permafrost response to seasonal and long term air temperature variation
S. Ge, J. McKenzie, C. Voss, Q. Wu
2011, Geophysical Research Letters (38)
Permafrost dynamics impact hydrologic cycle processes by promoting or impeding groundwater and surface water exchange. Under seasonal and decadal air temperature variations, permafrost temperature changes control the exchanges between groundwater and surface water. A coupled heat transport and groundwater flow model, SUTRA, was modified to simulate groundwater flow and heat...
Petroleum prospectivity of the Canada Basin, Arctic Ocean
Arthur Grantz, Patrick E. Hart
2011, Conference Paper, Society of Petroleum Engineers - Arctic Technology Conference 2011
Reconnaissance seismic reflection data indicate that Canada Basin is a >700,000 sq. km. remnant of the Amerasia Basin of the Arctic Ocean that lies south of the Alpha-Mendeleev Large Igneous Province, which was constructed across the northern part of the Amerasia Basin between about 127 and 89–83.5 Ma. Canada Basin...
Optical ages indicate the southwestern margin of the Green Bay Lobe in Wisconsin, USA, was at its maximum extent until about 18,500 years ago
J.W. Attig, P.R. Hanson, J.E. Rawling, A.R. Young, E.C. Carson
2011, Geomorphology (130) 384-390
Samples for optical dating were collected to estimate the time of sediment deposition in small ice-marginal lakes in the Baraboo Hills of Wisconsin. These lakes formed high in the Baraboo Hills when drainage was blocked by the Green Bay Lobe when it was at or very near its maximum...
Complex dynamics at the interface between wild and domestic viruses of finfish
Gael Kurath, J. Winton
2011, Current Opinion in Virology (1) 73-80
Viral traffic occurs readily between wild and domesticated stocks of finfish because aquatic environments have greater connectivity than their terrestrial counterparts and because the global expansion and dynamic nature of intensive aquaculture provide multiple pathways of transmission and unique drivers of virus adaptation. Supported by examples from the literature, we...
Effects of slow recovery rates on water column geochemistry in aquitard wells
K. E. Schilling
2011, Applied Geochemistry (26) 1108-1114
Monitoring wells are often installed in aquitards to verify effectiveness for preventing migration of surface contaminants to underlying aquifers. However, water sampling of aquitard wells presents a challenge due to the slow recovery times for water recharging the wells, which can take as long as weeks, months or years to...
Tsunami risk mapping simulation for Malaysia
S.Y. Teh, H. L. Koh, Y.T. Moh, D. L. De Angelis, J. Jiang
2011, Conference Paper, WIT Transactions on the Built Environment
The 26 December 2004 Andaman mega tsunami killed about a quarter of a million people worldwide. Since then several significant tsunamis have recurred in this region, including the most recent 25 October 2010 Mentawai tsunami. These tsunamis grimly remind us of the devastating destruction that a tsunami might inflict on...
Modelling detectability of kiore (Rattus exulans) on Aguiguan, Mariana Islands, to inform possible eradication and monitoring efforts
A.A.Y. Adams, J.W. Stanford, A.S. Wiewel, G.H. Rodda
2011, New Zealand Journal of Ecology (35) 145-152
Estimating the detection probability of introduced organisms during the pre-monitoring phase of an eradication effort can be extremely helpful in informing eradication and post-eradication monitoring efforts, but this step is rarely taken. We used data collected during 11 nights of mark-recapture sampling on Aguiguan, Mariana Islands, to estimate introduced kiore...
Salvage logging versus the use of burnt wood as a nurse object to promote post-fire tree seedling establishment
J. Castro, Craig D. Allen, M. Molina-Morales, Sara Maranon-Jimenez, A. Sanchez-Miranda, R. Zamora
2011, Restoration Ecology (19) 537-544
Intense debate surrounds the effects of post-fire salvage logging (SL) versus nonintervention policies on forest regeneration, but scant support is available from experimental studies. We analyze the effect of three post-fire management treatments on the recruitment of a serotinous pine (Pinus pinaster) at a Mediterranean mountain. Treatments were applied 7...
Neotectonic inversion of the Hindu Kush-Pamir mountain region
C.A. Ruleman
2011, Himalayan Geology (32) 95-111
The Hindu Kush-Pamir region of southern Asia is one of Earth's most rapidly deforming regions and it is poorly understood. This study develops a kinematic model based on active faulting in this part of the Trans-Himalayan orogenic belt. Previous studies have described north-verging thrust faults and some strike-slip faults, reflected...
