Glacier modeling in support of field observations of mass balance at South Cascade Glacier, Washington, USA
Edward G. Josberger, William R. Bidlake
2010, Report
The long-term USGS measurement and reporting of mass balance at South Cascade Glacier was assisted in balance years 2006 and 2007 by a new mass balance model. The model incorporates a temperature-index melt computation and accumulation is modeled from glacier air temperature and gaged precipitation at a remote site. Mass...
Human enteric viruses in groundwater indicate offshore transport of human sewage to coral reefs of the Upper Florida Keys
J. Carrie Futch, Dale W. Griffin, Erin K. Lipp
2010, Environmental Microbiology (12) 964-974
To address the issue of human sewage reaching corals along the main reef of the Florida Keys, samples were collected from surface water, groundwater and coral [surface mucopolysaccharide layers (SML)] along a 10 km transect near Key Largo, FL. Samples were collected semi-annually between July 2003 and September 2005 and...
Use of regression‐based models to map sensitivity of aquatic resources to atmospheric deposition in Yosemite National Park, USA
David W. Clow, Leora Nanus, Brian Huggett
2010, Water Resources Research (46)
An abundance of exposed bedrock, sparse soil and vegetation, and fast hydrologic flushing rates make aquatic ecosystems in Yosemite National Park susceptible to nutrient enrichment and episodic acidification due to atmospheric deposition of nitrogen (N) and sulfur (S). In this study, multiple linear regression (MLR) models were created to estimate...
Prioritization of high-production volume (HPV) chemicals for assessing water resources
James Pankow, John Zogorski, Joshua Valder, Wentai Luo
2010, Report
PDF version of a presentation on assessing water resources given at the 2010 National Water-Quality Monitoring Conference....
Groundwater-surface water interactions within the Chehalis River Basin: presentation ot the Chehalis Basin Partnership
Andy Gendaszek
2010, Report
PDF of a presentation on the groundwater - surface water interactions in the Chehalis River Basin in Washington state....
Water-quality, water-level, and discharge data associated with the Mississippi embayment agricultural chemical-transport study, 2006-2008
Melinda S. Dalton, Claire E. Rose, Richard H. Coupe
2010, Data Series 546
In 2006, the Agricultural Chemicals: Sources, Transport and Fate study team (Agricultural Chemicals Team, ACT) of the U.S. Geological Survey National Water-Quality Assessment Program began a study in northwestern Mississippi to evaluate the influence of surface-water recharge on the occurrence of agriculturally related nutrients and pesticides in the Mississippi River...
Are wolves saving Yellowstone's aspen? A landscape-level test of a behaviorally mediated trophic cascade
Matthew J. Kauffman, Jedediah F. Brodie, Erik S. Jules
2010, Ecology (91) 2742-2755
Behaviorally mediated trophic cascades (BMTCs) occur when the fear of predation among herbivores enhances plant productivity. Based primarily on systems involving small-bodied predators, BMTCs have been proposed as both strong and ubiquitous in natural ecosystems. Recently, however, synthetic work has suggested that the existence of BMTCs may be mediated by...
Quarterly wildlife mortality report: October 2009 to December 2009
Anne Ballmann, C. LeAnn White, Krysten Schuler, Jennifer Bradsby
2010, Wildlife Disease Association Newsletter 6-8
No abstract available....
Discussion of "Natural hydrograph of the Missouri River near Sioux City and the least tern and piping plover" by Donald G. Jorgensen
D. Catlin, R. Jacobson, M. Sherfy, M. Anteau, J. Felio, J. Fraser, C. Lott, T. Shaffer, J. Stucker
2010, Journal of Hydrologic Engineering (15) 1076-1078
The author analyzed stream-flow data from a single gauging station to predict preengineering flooding frequency for "sandbar islands adjacent to stream gauge on the Missouri River at Sioux City." He predicted dates that sandbars would be exposed and discussed his results relative to reproduction by least terns (Sternula antillarum) and...
Surveys for presence of Oregon spotted frog (Rana pretiosa): background information and field methods
Christopher A. Pearl, David Clayton, Lauri Turner
2010, Report
The Oregon spotted frog (Rana pretiosa) is the most aquatic of the native frogs in the Pacific Northwest. The common name derives from the pattern of black, ragged-edged spots set against a brown or red ground color on the dorsum of adult frogs. Oregon spotted frogs are generally associated with...
Comparison of sap flux, moisture flux tower and MODIS enhanced vegetation index methods for estimating riparian evapotranspiration
Pamela L. Nagler, Edward P. Glenn, Kiyomi Morino
Christopher M.U Neale, Michael H. Cosh, editor(s)
2010, Conference Paper, Remote sensing and hydrology
Riparian evapotranspiration (ET) was measured on a salt cedar (Tamarix spp.) dominated river terrace on the Lower Colorado River from 2007 to 2009 using tissue-heat-balance sap flux sensors at six sites representing very dense, medium dense, and sparse stands of plants. Salt cedar ET varied markedly across sites, and sap...
Decline of shortjaw cisco in Lake Superior: the role of overfishing and risk of extinction
Charles R. Bronte, Michael H. Hoff, Owen T. Gorman, Wayne E. Thogmartin, Philip J. Schneeberger, Thomas N. Todd
2010, Transactions of the American Fisheries Society (139) 735-748
Recent reviews have further documented the decline of the shortjaw cisco Coregonus zenithicus in Lake Superior. This fish was the most abundant deepwater cisco species in Lake Superior in the early 1920s but presently makes up less than 1% of all deepwater ciscoes (i.e., including shortjaw cisco, bloater C. hoyi,...
Coherence of Mach fronts during heterogeneous supershear earthquake rupture propagation: Simulations and comparison with observations
A. Bizzarri, Eric M. Dunham, P. Spudich
2010, Journal of Geophysical Research B: Solid Earth (115) B08301
We study how heterogeneous rupture propagation affects the coherence of shear and Rayleigh Mach wavefronts radiated by supershear earthquakes. We address this question using numerical simulations of ruptures on a planar, vertical strike-slip fault embedded in a three-dimensional, homogeneous, linear elastic half-space. Ruptures propagate spontaneously in accordance with a linear...
Predicted liquefaction in the greater Oakland area and northern Santa Clara Valley during a repeat of the 1868 Hayward Fault (M6.7-7.0) earthquake
Thomas L. Holzer, Thomas E. Noce, Michael J. Bennett
2010, Proceedings of the Third Conference on Earthquake Hazards in the Eastern San Francisco Bay Area 147-163
Probabilities of surface manifestations of liquefaction due to a repeat of the 1868 (M6.7-7.0) earthquake on the southern segment of the Hayward Fault were calculated for two areas along the margin of San Francisco Bay, California: greater Oakland and the northern Santa Clara Valley. Liquefaction is predicted to be more...
Thiamine status and culture of rainbow smelt (Osmerus mordax) from Owasco Lake, New York
Marc A. Chalupnicki, H. George Ketola, Micheal H. Zehfus, Jonathan R. Crosswait, Jacques Rinchard, James E. McKenna Jr.
2010, Journal of Freshwater Ecology (25) 211-217
In 2005, 2008, and 2009, eggs were collected for analysis of total thiamine fiom 2, 58, and 30 gravid rainbow smelt (Osmerus mordax) captured in Edgewater Creek, Owasco Lake, New York, respectively. Mean egg thiamine concentrations (nmollg i standard error) in 2005, 2008, and 2009 were 6.0 ± 1.8, 13.3...
Anisotropy, repeating earthquakes, and seismicity associated with the 2008 eruption of Okmok Volcano, Alaska
Jessica H. Johnson, Stephanie Prejean, Martha K. Savage, John Townend
2010, Journal of Geophysical Research (115)
We use shear wave splitting (SWS) analysis and double-difference relocation to examine temporal variations in seismic properties prior to and accompanying magmatic activity associated with the 2008 eruption of Okmok volcano, Alaska. Using bispectrum cross-correlation, a multiplet of 25 earthquakes is identified spanning five years leading up to the eruption,...
Ope`ape`a: Solving the puzzles of Hawaii's only bat
Frank J. Bonaccorso
2010, BATS Magazine (28) 10-12
The Hawaiian hoary bat is described as the only land mammal native to Hawaii. In fact, this bat (Lasiurus cinereus semotus) arrived on the islands some 10,000 years ago – in what must qualify as one of the most spectacular immigrations in the history of mammals. The Hawaiian islands, after...
Ground surface deformation patterns, magma supply, and magma storage at Okmok volcano, Alaska, from InSAR analysis: 1. Intereruption deformation, 1997–2008
Zhong Lu, Daniel Dzurisin, Juliet Biggs, Charles Wicks Jr., Steve McNutt
2010, Journal of Geophysical Research (115)
Starting soon after the 1997 eruption at Okmok volcano and continuing until the start of the 2008 eruption, magma accumulated in a storage zone centered ~3.5 km beneath the caldera floor at a rate that varied with time. A Mogi-type point pressure source or finite sphere with a radius of...
Scientific drilling into the San Andreas Fault Zone
Mark Zoback, Stephen Hickman, William Ellsworth
2010, Eos, Transactions, American Geophysical Union (91) 197-199
This year, the world has faced energetic and destructive earthquakes almost every month. In January, an M = 7.0 event rocked Haiti, killing an estimated 230,000 people. In February, an M = 8.8 earthquake and tsunami claimed over 500 lives and caused billions of dollars of damage in Chile. Fatal...
Sexual difference in PCB concentrations of lake trout (Salvelinus namaycush) from Lake Ontario
Charles P. Madenjian, Michael J. Keir, D. Michael Whittle, George E. Noguchi
2010, Science of the Total Environment (408) 1725-1730
We determined polychlorinated biphenyl (PCB) concentrations in 61 female lake trout (Salvelinus namaycush) and 71 male lake trout from Lake Ontario (Ontario, Canada and New York, United States). To estimate the expected change in PCB concentration due to spawning, PCB concentrations in gonads and in somatic tissue of lake trout...
Field evaluation of a two-dimensinal hydrodynamic model near boulders for habitat calculation
Terry Waddle
2010, River Research and Applications (26) 730-741
Two-dimensional hydrodynamic models are now widely used in aquatic habitat studies. To test the sensitivity of calculated habitat outcomes to limitations of such a model and of typical field data, bathymetry, depth and velocity data were collected for three discharges in the vicinity of two large boulders in the South...
Mount St. Helens: A 30-year legacy of volcanism
James W. Vallance, Cynthia A. Gardner, William E. Scott, Richard M. Iverson, Thomas C. Pierson
2010, Eos, Transactions, American Geophysical Union (91) 169-171
The spectacular eruption of Mount St. Helens on 18 May 1980 electrified scientists and the public. Photodocumentation of the colossal landslide, directed blast, and ensuing eruption column—which reached as high as 25 kilometers in altitude and lasted for nearly 9 hours—made news worldwide. Reconnaissance of the devastation spurred efforts to...
Ground surface deformation patterns, magma supply, and magma storage at Okmok volcano, Alaska, from InSAR analysis: 2. Coeruptive deflation, July-August 2008
Zhong Lu, Daniel Dzurisin
2010, Journal of Geophysical Research B: Solid Earth (115)
A hydrovolcanic eruption near Cone D on the floor of Okmok caldera, Alaska, began on 12 July 2008 and continued until late August 2008. The eruption was preceded by inflation of a magma reservoir located beneath the center of the caldera and ∼3 km below sea level (bsl), which began...
Analysis of nonvolcanic tremor on the San Andreas Fault near Parkfield, CA using U.S. Geological Survey Parkfield Seismic Array
Jon B. Fletcher, Lawrence M. Baker
2010, Journal of Geophysical Research B: Solid Earth (115)
Reports by Nadeau and Dolenc (2005) that tremor had been detected near Cholame Valley spawned an effort to use UPSAR (U. S. Geological Survey Parkfield Seismic Array) to study characteristics of tremor. UPSAR was modified to record three channels of velocity at 40–50 sps continuously in January 2005 and ran...
CORSSA: The Community Online Resource for Statistical Seismicity Analysis
Andrew J. Michael, Stefan Wiemer
2010, Community Online Resource for Statistical Seismicity Analysis (1) 1-13
Statistical seismology is the application of rigorous statistical methods to earthquake science with the goal of improving our knowledge of how the earth works. Within statistical seismology there is a strong emphasis on the analysis of seismicity data in order to improve our scientific understanding of earthquakes and to improve...
