Impact craters on Titan
C. A. Wood, R. Lorenz, R. Kirk, R. Lopes, Ken Mitchell, E. Stofan
2010, Icarus (206) 334-344
Five certain impact craters and 44 additional nearly certain and probable ones have been identified on the 22% of Titan's surface imaged by Cassini's high-resolution radar through December 2007. The certain craters have morphologies similar to impact craters on rocky planets, as well as two with radar bright, jagged rims....
A simple physical model for deep moonquake occurrence times
R.C. Weber, B.G. Bills, C.L. Johnson
2010, Physics of the Earth and Planetary Interiors (182) 152-160
The physical process that results in moonquakes is not yet fully understood. The periodic occurrence times of events from individual clusters are clearly related to tidal stress, but also exhibit departures from the temporal regularity this relationship would seem to imply. Even simplified models that capture some of the relevant...
Influences of acid mine drainage and thermal enrichment on stream fish reproduction and larval survival
Andrew W. Hafs, C.D. Horn, P. M. Mazik, K.J. Hartman
2010, Northeastern Naturalist (17) 575-592
Potential effects of acid mine drainage (AMD) and thermal enrichment on the reproduction of fishes were investigated through a larval-trapping survey in the Stony River watershed, Grant County, WV. Trapping was conducted at seven sites from 26 March to 2 July 2004. Overall larval catch was low (379 individuals in...
Hydrothermal heat discharge in the Cascade Range, northwestern United States
S. E. Ingebritsen, Robert H. Mariner
2010, Journal of Volcanology and Geothermal Research (196) 208-218
Hydrothermal heat discharge in the Cascade Range includes the heat discharged by thermal springs, by "slightly thermal" springs that are only a few degrees warmer than ambient temperature, and by fumaroles. Thermal-spring heat discharge is calculated on the basis of chloride-flux measurements and geothermometer temperatures and totals ~ 240 MW...
Radiometric, geometric, and image quality assessment of ALOS AVNIR-2 and PRISM sensors
S. Saunier, P. Goryl, G. Chander, R. Santer, M. Bouvet, B. Collet, A. Mambimba, Aksakal S. Kocaman
2010, IEEE Transactions on Geoscience and Remote Sensing (48) 3855-3866
The Advanced Land Observing Satellite (ALOS) was launched on January 24, 2006, by a Japan Aerospace Exploration Agency (JAXA) H-IIA launcher. It carries three remote-sensing sensors: 1) the Advanced Visible and Near-Infrared Radiometer type 2 (AVNIR-2); 2) the Panchromatic Remote-Sensing Instrument for Stereo Mapping (PRISM); and 3) the Phased-Array type...
Landscape characteristics affecting streams in urbanizing regions of the Delaware River Basin (New Jersey, New York, and Pennsylvania, U.S.)
K. Riva-Murray, R. Riemann, P. Murdoch, J.M. Fischer, R. Brightbill
2010, Landscape Ecology (25) 1489-1503
Widespread and increasing urbanization has resulted in the need to assess, monitor, and understand its effects on stream water quality. Identifying relations between stream ecological condition and urban intensity indicators such as impervious surface provides important, but insufficient information to effectively address planning and management needs in such areas. In...
Tropical shoreline ice in the late Cambrian: Implications for earth's climate between the Cambrian Explosion and the Great Ordovician Biodiversification Event
Anthony C. Runkel, T.J. MacKey, Clinton A. Cowan, David L. Fox
2010, GSA Today (20) 4-10
Middle to late Cambrian time (ca. 513 to 488 Ma) is characterized by an unstable plateau in biodiversity, when depauperate shelf faunas suffered repeated extinctions. This poorly understood interval separates the Cambrian Explosion from the Great Ordovician Biodiversification Event and is generally regarded as a time of sustained greenhouse conditions....
Fine gravel controls hydrologic and erodibility responses to trampling disturbance for coarse-textured soils with weak cyanobacterial crusts
J. E. Herrick, J. W. Van Zee, J. Belnap, J.R. Johansen, M. Remmenga
2010, Catena (83) 119-126
We compared short-term effects of lug-soled boot trampling disturbance on water infiltration and soil erodibility on coarse-textured soils covered by a mixture of fine gravel and coarse sand over weak cyanobacterially-dominated biological soil crusts. Trampling significantly reduced final infiltration rate and total infiltration and increased sediment generation from small (0.5m2)...
Effects of ungulate management on vegetation at Hakalau Forest National Wildlife Refuge, Hawai'i Island
S.C. Hess, J.J. Jeffrey, L.W. Pratt, D.L. Ball
2010, Pacific Conservation Biology (16) 144-150
We compiled and analysed data from 1987-2004 on vegetation monitoring during feral ungulate management at Hakalau Forest National Wildlife Refuge, a tropical montane rainforest on the island of Hawai'i All areas in the study had previously been used by ungulates, but cattle (Bos taurus) were removed and feral pig (Sus...
Geoinformatics: Transforming data to knowledge for geosciences
A.K. Sinha, Z. Malik, A. Rezgui, C. G. Barnes, K. Lin, G. Heiken, W.A. Thomas, L.C. Gundersen, R. Raskin, I. Jackson, P. Fox, D. McGuinness, D. Seber, H. Zimmerman
2010, GSA Today (20) 4-10
An integrative view of Earth as a system, based on multidisciplinary data, has become one of the most compelling reasons for research and education in the geosciences. It is now necessary to establish a modern infrastructure that can support the transformation of data to knowledge. Such an information infrastructure for...
Meteoric 10Be in soil profiles - A global meta-analysis
Joseph A. Graly, Paul R. Bierman, Lucas J. Reusser, Milan J. Pavich
2010, Geochimica et Cosmochimica Acta (74) 6814-6829
In order to assess current understanding of meteoric 10Be dynamics and distribution in terrestrial soils, we assembled a database of all published meteoric 10Be soil depth profiles, including 104 profiles from 27 studies in globally diverse locations, collectively containing 679 individual measurements. This allows for the systematic comparison of meteoric...
Context-specific influence of water temperature on brook trout growth rates in the field
C. Xu, B. H. Letcher, K.H. Nislow
2010, Freshwater Biology (55) 2253-2264
1. Modelling the effects of climate change on freshwater fishes requires robust field-based estimates accounting for interactions among multiple factors.2. We used data from an 8-year individual-based study of a wild brook trout (Salvelinus fontinalis) population to test the influence of water temperature on season-specific growth in the context of...
Effect of concentration of dispersed organic matter on optical maturity parameters: Interlaboratory results of the organic matter concentration working group of the ICCP.
J.G. Mendonca Filho, C.V. Araujo, A.G. Borrego, A. Cook, D. Flores, P. Hackley, J.C. Hower, M.L. Kern, K. Kommeren, J. Kus, Maria Mastalerz, J.O. Mendonca, T.R. Menezes, J. Newman, P. Ranasinghe, I.V.A.F. Souza, I. Suarez-Ruiz, Y. Ujiie
2010, International Journal of Coal Geology (84) 154-165
The main objective of this work was to study the effect of the kerogen isolation procedures on maturity parameters of organic matter using optical microscopes. This work represents the results of the Organic Matter Concentration Working Group (OMCWG) of the International Committee for Coal and Organic Petrology (ICCP) during the...
Millennial-scale variability during the last glacial in vegetation records from North America
Gonzalo Jiménez-Moreno, R. Scott Anderson, S. Desprat, L.D. Grigg, E.C. Grimm, L.E. Heusser, Brian F. Jacobs, C. Lopez-Martinez, C.L. Whitlock, Debra A. Willard
2010, Quaternary Science Reviews (29) 2865-2881
High-resolution pollen records from North America show that terrestrial environments were affected by Dansgaard-Oeschger (D-O) and Heinrich climate variability during the last glacial. In the western, more mountainous regions, these climate changes are generally observed in the pollen records as altitudinal movements of climate-sensitive plant species, whereas in the southeast,...
Book review: Thermodynamics and kinetics of water-rock interaction
D. Kirk Nordstrom
2010, Elements (6) 60-61
No abstract available....
Effects of exploitation on black bear populations at White River National Wildlife Refuge
J. D. Clark, R. Eastridge, M.J. Hooker
2010, Journal of Wildlife Management (74) 1448-1456
We live-trapped American black bears (Ursus americanus) and sampled DNA from hair at White River National Wildlife Refuge, Arkansas, USA, to estimate annual population size (N), growth (λ), and density. We estimated N and λ with open population models, based on live-trapping data collected from 1998 through 2006, and robust...
Repeat photography and low-elevation fire responses in the southwestern United States
Raymond M. Turner, Robert H. Webb, Todd C. Esque, Garry F. Rogers
Robert H. Webb, Diane E. Boyer, Raymond M. Turner, editor(s)
2010, Book chapter, Repeat photography methods and applications in the natural sciences
Sampling and analysis of emerging pollutants
Tammy L. Jones-Lepp, David A. Alvarez
Yuncong Li, Kati W. Migliaccio, editor(s)
2010, Book chapter, Water quality concepts, sampling, and analyses
No abstract available. ...
Phosphorus dynamics in soils irrigated with reclaimed waste water or fresh water - A study using oxygen isotopic composition of phosphate
I. Zohar, A. Shaviv, M. Young, Carol Kendall, Steven R. Silva, A. Paytan
2010, Geoderma (159) 109-121
Transformations of phosphate (Pi) in different soil fractions were tracked using the stable isotopic composition of oxygen in phosphate (δ18Op) and Pi concentrations. Clay soil from Israel was treated with either reclaimed waste water (secondary, low grade) or with fresh water amended with a chemical fertilizer of a known isotopic...
Abundances and distribution of minerals and elements in high-alumina coal fly ash from the Jungar Power Plant, Inner Mongolia, China
S. Dai, L. Zhao, S. Peng, C. L. Chou, X. Wang, Y. Zhang, D. Li, Y. Sun
2010, International Journal of Coal Geology (81) 320-332
The fly ash from the Jungar Power Plant, Inner Mongolia, China, is unique because it is highly enriched in alumina (Al2O3>50%). The fly ash mainly consists of amorphous glass and mullite and trace amounts of corundum, quartz, char, calcite, K-feldspar, clay minerals, and Fe-bearing minerals. The mullite content in fly...
Grid-size dependence of Cauchy boundary conditions used to simulate stream-aquifer interactions
S. Mehl, M. C. Hill
2010, Advances in Water Resources (33) 430-442
This work examines the simulation of stream–aquifer interactions as grids are refined vertically and horizontally and suggests that traditional methods for calculating conductance can produce inappropriate values when the grid size is changed. Instead, different grid resolutions require different estimated values. Grid refinement strategies considered include global refinement of the...
Generation and emplacement of fine-grained ejecta in planetary impacts
R.R. Ghent, V. Gupta, B.A. Campbell, S.A. Ferguson, J.C.W. Brown, R.L. Fergason, L.M. Carter
2010, Icarus (209) 818-835
We report here on a survey of distal fine-grained ejecta deposits on the Moon, Mars, and Venus. On all three planets, fine-grained ejecta form circular haloes that extend beyond the continuous ejecta and other types of distal deposits such as run-out lobes or ramparts. Using Earth-based radar images, we find...
Using chloride and other ions to trace sewage and road salt in the Illinois Waterway
W.R. Kelly, S.V. Panno, Keith C. Hackley, H.-H. Hwang, A.T. Martinsek, M. Markus
2010, Applied Geochemistry (25) 661-673
Chloride concentrations in waterways of northern USA are increasing at alarming rates and road salt is commonly assumed to be the cause. However, there are additional sources of Cl- in metropolitan areas, such as treated wastewater (TWW) and water conditioning salts, which may be contributing to Cl- loads entering surface...
Use of the azimuthal resistivity technique for determination of regional azimuth of transmissivity
David R. Carlson
2010, Environmental Geosciences (17) 163-174
Many bedrock units contain joint sets that commonly act as preferred paths for the movement of water, electrical charge, and possible contaminants associated with production or transit of crude oil or refined products. To facilitate the development of remediation programs, a need exists to reliably determine regional-scale properties of these...
Phylogeography of wolves (Canis lupus) in the Pacific Northwest
Byron V. Weckworth, Sandra L. Talbot, Joseph A. Cook
2010, Journal of Mammalogy (91) 363-375
Glacial cycles in the late Pleistocene played a dominant role in sculpting the evolutionary histories of many high-latitude organisms. The refugial hypothesis argues that populations retracted during glacial maxima and were isolated in separate refugia. One prediction of this hypothesis is that populations inhabiting different refugia diverged and then, during...
