Update on subsidence at the Wairakei-Tauhara geothermal system, New Zealand
R. Allis, C. Bromley, S. Currie
2009, Geothermics (38) 169-180
The total subsidence at the Wairakei field as a result of 50 years of geothermal fluid extraction is 15 ?? 0.5 m. Subsidence rates in the center of the subsidence bowl have decreased from over 450 mm/year during the 1970s to 80-90 mm/year during 2000-2007. The location of the bowl,...
Predatory senescence in ageing wolves
D.R. MacNulty, D.W. Smith, J.A. Vucetich, L.D. Mech, D.R. Stahler, C. Packer
2009, Ecology Letters (12) 1347-1356
It is well established that ageing handicaps the ability of prey to escape predators, yet surprisingly little is known about how ageing affects the ability of predators to catch prey. Research into long-lived predators has assumed that adults have uniform impacts on prey regardless of age. Here we use longitudinal...
Spatially detailed quantification of metal loading for decision making: Metal mass loading to American fork and Mary Ellen Gulch, Utah
B. A. Kimball, R.L. Runkel
2009, Mine Water and the Environment (28) 274-290
Effective remediation requires an understanding of the relative contributions of metals from all sources in a catchment, and that understanding must be based on a spatially detailed quantification of metal loading. A traditional approach to quantifying metal loading has been to measure discharge and chemistry at a catchment outlet. This...
Rock slope stability analysis along the North Carolina section of the Blue Ridge Parkway: Using a geographic information system (GIS) to integrate site data and digital geologic maps
R.S. Latham, R.M. Wooten, B.L. Cattanach, C.E. Merschat, G.N. Bozdog
2009, Conference Paper, 43rd U.S. Rock Mechanics Symposium and 4th U.S.-Canada Rock Mechanics Symposium
In 2008, the North Carolina Geological Survey (NCGS) completed a five-year geologic and geohazards inventory of the 406-km long North Carolina segment of the Blue Ridge Parkway (BRP). The ArcGIS™ format deliverables for rock slopes include a slope movement and slope movement deposit database and maps...
Seismic analysis of clinoform depositional sequences and shelf-margin trajectories in Lower Cretaceous (Albian) strata, Alaska North Slope
David W. Houseknecht, Kenneth J. Bird, Christopher J. Schenk
2009, Basin Research (21) 644-654
Lower Cretaceous strata beneath the Alaska North Slope include clinoform depositional sequences that filled the western Colville foreland basin and overstepped the Beaufort rift shoulder. Analysis of Albian clinoform sequences with two‐dimensional (2D) seismic data resulted in the recognition of seismic facies inferred to represent lowstand, transgressive and highstand systems...
A case study of two M~5 mainshocks in Anza, California: Is the footprint of an aftershock sequence larger than we think?
Karen R. Fritts, Debi Kilb
2009, Bulletin of the Seismological Society of America (99) 2721-2735
It has been traditionally held that aftershocks occur within one to two fault lengths of the mainshock. Here we demonstrate that this perception has been shaped by the sensitivity of seismic networks. The 31 October 2001 Mw 5.0 and 12 June 2005 Mw 5.2 Anza mainshocks in southern California occurred in the middle of...
Beach morphology and change along the mixed grain-size delta of the dammed Elwha River, Washington
J.A. Warrick, D.A. George, G. Gelfenbaum, P. Ruggiero, G. M. Kaminsky, M. Beirne
2009, Geomorphology (111) 136-148
Sediment supply provides a fundamental control on the morphology of river deltas, and humans have significantly modified these supplies for centuries. Here we examine the effects of almost a century of sediment supply reduction from the damming of the Elwha River in Washington on shoreline position and beach morphology of...
Comparative endocrinology in the 21st century
R.J. Denver, P.M. Hopkins, S. D. McCormick, C.R. Propper, L. Riddiford, S.A. Sower, J.C. Wingfield
2009, Integrative and Comparative Biology (49) 339-348
Hormones coordinate developmental, physiological, and behavioral processes within and between all living organisms. They orchestrate and shape organogenesis from early in development, regulate the acquisition, assimilation, and utilization of nutrients to support growth and metabolism, control gamete production and sexual behavior, mediate organismal responses to environmental change, and allow for...
Storm clouds on Saturn: Lightning-induced chemistry and associated materials consistent with Cassini/VIMS spectra
K. H. Baines, M.L. Delitsky, T.W. Momary, R. H. Brown, B. J. Buratti, R. N. Clark, P. D. Nicholson
2009, Planetary and Space Science (57) 1650-1658
Thunderstorm activity on Saturn is associated with optically detectable clouds that are atypically dark throughout the near-infrared. As observed by Cassini/VIMS, these clouds are ~20% less reflective than typical neighboring clouds throughout the spectral range from 0.8 ??m to at least 4.1 ??m. We propose that active thunderstorms originating in...
Threatened fishes of the world: Moapa coriacea Hubbs and Miller, 1948 (cyprinidae)
G.G. Scoppettone, S. Goodchild
2009, Environmental Biology of Fishes (86) 339-340
Moapa dace. Conservation status: Endangered (U.S. Department of the Interior 1967), Critically Endangered, IUCN (Gimenez 1996). Identification: Small embedded scales, narrow caudal peduncle and a bright black spot at the base of deeply forked tail. Pharyngeal...
Husbandry stress exacerbates mycobacterial infections in adult zebrafish, Danio rerio (Hamilton)
J.M. Ramsay, Virginia G. Watral, C.B. Schreck, M.L. Kent
2009, Journal of Fish Diseases (32) 931-941
Mycobacteria are significant pathogens of laboratory zebrafish, Danio rerio (Hamilton). Stress is often implicated in clinical disease and morbidity associated with mycobacterial infections but has yet to be examined with zebrafish. The aim of this study was to examine the effects of husbandry stressors on zebrafish infected with mycobacteria. Adult...
Male songbirds provide indirect parental care by guarding females during incubation
B.C. Fedy, T. E. Martin
2009, Behavioral Ecology (20) 1034-1038
Across many taxa, guarding of fertile mates is a widespread tactic that enhances paternity assurance. However, guarding of mates can also occur during the nonfertile period, and the fitness benefits of this behavior are unclear. Male songbirds, for example, sometimes guard nonfertile females during foraging recesses from incubation. We hypothesized...
Erosion of soil organic carbon: implications for carbon sequestration
Kristof Van Oost, Hendrik Van Hemelryck, Jennifer W. Harden
B.J. McPherson, E.T. Sundquist, editor(s)
2009, Book chapter, Carbon Sequestration and Its Role in the Global Carbon Cycle
Agricultural activities have substantially increased rates of soil erosion and deposition, and these processes have a significant impact on carbon (C) mineralization and burial. Here, we present a synthesis of erosion effects on carbon dynamics and discuss the implications of soil erosion for carbon sequestration strategies. We demonstrate that for...
Fast forward modeling of Titan's infrared spectra to invert VIMS/Cassini hyperspectral images
S. Rodriguez, Stéphane Le Mouélic, P. Rannou, J. #NAME? Combe, L.L. Corre, G. Tobie, J. W. Barnes, Christophe Sotin, R. H. Brown, K. H. Baines, B. J. Buratti, R. N. Clark, P. D. Nicholson
2009, Conference Paper, WHISPERS '09 - 1st Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing
The surface of Titan, the largest icy moon of Saturn, is veiled by a very thick and hazy atmosphere. The Visual and Infrared Mapping Spectrometer onboard the Cassini spacecraft, in orbit around Saturn since July 2004, conduct an intensive survey of Titan with the objective to understand the complex nature...
Preface
Brian J. McPherson, Eric T. Sundquist
2009, Book chapter, Carbon sequestration and Its role in the global carbon cycle
Carbon sequestration has emerged as an important option in policies to mitigate the increasing atmospheric concentrations of anthropogenic carbon dioxide (CO2). Significant quantities of anthropogenic CO2 are sequestered by natural carbon uptake in plants, soils, and the oceans. These uptake processes are objects of intense study by biogeochemists, ecologists, and...
Multiple dendrochronological responses to the eruption of Cinder Cone, Lassen Volcanic National Park, California
P.R. Sheppard, M.H. Ort, K.C. Anderson, M.A. Clynne, E.M. May
2009, Dendrochronologia (27) 213-221
Two dendrochronological properties – ring width and ring chemistry – were investigated in trees near Cinder Cone in Lassen Volcanic National Park, northeastern California, for the purpose of re-evaluating the date of its eruption. Cinder Cone is thought to have erupted in AD 1666 based on ring-width evidence, but interpreting...
Field tests prove microscale NRU to upgrade low-btu gas
Saibal Bhattacharya, K. David Newell, W. Lynn Watney, Micael Sigel
2009, Oil & Gas Journal (107) 44-53
The Kansas Geological Survey (University of Kansas) and the American Energies Corp., Wichita, have conducted field tests of a scalable, microscale, N2-rejection unit (NRU) to demonstrate its effectiveness to upgrade low-pressure ((<100 psig) and low-volume (=100 Mcfd) low-btu gas to pipeline quality. The tests aim to develop inexpensive NRU technology,...
An introduction to global carbon cycle management
Eric T. Sundquist, Katherine V. Ackerman, Lauren Parker, Deborah N. Huntzinger
2009, Book chapter, Carbon Sequestration and Its Role in the Global Carbon Cycle
Past and current human activities have fundamentally altered the global carbon cycle. Potential future efforts to control atmospheric CO2 will also involve significant changes in the global carbon cycle. Carbon cycle scientists and engineers now face not only the difficulties of recording and understanding past and present changes but also...
THE subfossil occurrence and paleoecological significance of small mammals at ankilitelo cave, southwestern Madagascar
K.M. Muldoon, D. D. De Blieux, E.L. Simons, P.S. Chatrath
2009, Journal of Mammalogy (90) 1111-1131
Small mammals are rarely reported from subfossil sites in Madagascar despite their importance for paleoenvironmental reconstruction, especially as it relates to recent ecological changes on the island. We describe the uniquely rich subfossil small mammal fauna from Ankilitelo Cave, southwestern Madagascar. The Ankilitelo fauna is dated to the late...
Determination of diffusion coefficients of hydrogen in fused silica between 296 and 523 K by Raman spectroscopy and application of fused silica capillaries in studying redox reactions
L. Shang, I-Ming Chou, W. Lu, Robert Burruss, Y. Zhang
2009, Geochimica et Cosmochimica Acta (73) 5435-5443
Diffusion coefficients (D) of hydrogen in fused silica capillaries (FSC) were determined between 296 and 523 K by Raman spectroscopy using CO2 as an internal standard. FSC capsules (3.25 × 10−4 m OD, 9.9 × 10−5 m ID, and ∼0.01 m long) containing CO2 and H2were prepared and the initial relative concentrations of hydrogen in these capsules were derived from...
Source inversion of the W-phase: Realtime implementation and extension to low magnitudes
G.P. Hayes, L. Rivera, H. Kanamori
2009, Seismological Research Letters (80) 817-822
Online material: Results for W-phase inversions for 498 eventswith M > 5.8 in 2007-2008, compared to results from theglobal Centroid Moment Tensor catalog....
Scaling effects in direct shear tests
A.D. Orlando, D.M. Hanes, H.H. Shen
2009, Conference Paper, AIP Conference Proceedings
Laboratory experiments of the direct shear test were performed on spherical particles of different materials and diameters. Results of the bulk friction vs. non-dimensional shear displacement are presented as a function of the non-dimensional particle diameter. Simulations of the direct shear test were performed using the Discrete Element Method (DEM)....
The Mackenzie River magnetic anomaly, Yukon and Northwest Territories, Canada-Evidence for Early Proterozoic magmatic arc crust at the edge of the North American craton
M. Pilkington, R. W. Saltus
2009, Tectonophysics (478) 78-86
We characterize the nature of the source of the high-amplitude, long-wavelength, Mackenzie River magnetic anomaly (MRA), Yukon and Northwest Territories, Canada, based on magnetic field data collected at three different altitudes: 300 m, 3.5 km and 400 km. The MRA is the largest amplitude (13 nT)...
Geospatial Data Used in Water-Level and Land-Subsidence Studies in the Mojave River and Morongo Groundwater Basins for 2008
Carolyn Glockhoff, Christina L. Stamos
2009, Report
During 2008, the U.S. Geological Survey and other agencies made approximately 2,500 water-level measurements in the Mojave River and Morongo groundwater basins. These data document recent conditions and, when compared with previous data, changes in groundwater levels. A water-level contour map was drawn using data from about 700 wells, providing...
In-Flight performance of MESSENGER's Mercury dual imaging system
S.E. Hawkins, S.L. Murchie, K.J. Becker, C.M. Selby, F.S. Turner, M.W. Noble, N.L. Chabot, T.H. Choo, E.H. Darlington, B.W. Denevi, D.L. Domingue, C.M. Ernst, G.M. Holsclaw, N.R. Laslo, W.E. Mcclintock, L.M. Prockter, M.S. Robinson, S.C. Solomon, R.E. Sterner
2009, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The Mercury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft, launched in August 2004 and planned for insertion into orbit around Mercury in 2011, has already completed two flybys of the innermost planet. The Mercury Dual Imaging System (MDIS) acquired nearly 2500 images from the first two flybys and viewed...
