Has the magnitude of floods across the USA changed with global CO 2 levels?
R.M. Hirsch, K.R. Ryberg
2012, Hydrological Sciences Journal (57) 1-9
Statistical relationships between annual floods at 200 long-term (85-127 years of record) streamgauges in the coterminous United States and the global mean carbon dioxide concentration (GMCO2) record are explored. The streamgauge locations are limited to those with little or no regulation or urban development. The coterminous US is divided into...
El Niño-Southern oscillation variability from the late cretaceous marca shale of California
Andrew Davies, Alan E.S. Kemp, Graham P. Weedon, John A. Barron
2012, Geology (40) 15-18
Changes in the possible behavior of El Niño–Southern Oscillation (ENSO) with global warming have provoked interest in records of ENSO from past “greenhouse” climate states. The latest Cretaceous laminated Marca Shale of California permits a seasonal-scale reconstruction of water column flux events and hence interannual paleoclimate variability. The annual flux...
Histologic, immunologic and endocrine biomarkers indicate contaminant effects in fishes of the Ashtabula River
L. R. Iwanowicz, V. S. Blazer, N.P. Hitt, S. D. McCormick, D.S. Devault, C. A. Ottinger
2012, Ecotoxicology (21) 165-182
The use of fish as sentinels of aquatic ecosystem health is a biologically relevant approach to environmental monitoring and assessment. We examined the health of the Ashtabula River using histologic, immunologic, and endocrine biomarkers in brown bullhead (BB; Ameiurus nebulosus) and largemouth bass (Micropterus salmoides) and compared fish collected from...
Effects of high fire frequency in creosote bush scrub vegetation of the Mojave Desert
M.L. Brooks
2012, International Journal of Wildland Fire (21) 61-68
Plant invasions can increase fire frequency in desert ecosystems where fires were historically infrequent. Although there are many resource management concerns associated with high frequency fire in deserts, fundamental effects on plant community characteristics remain largely unstudied. Here I describe the effects of fire frequency on creosote bush scrub vegetation...
Holocene aridification of India
C. Ponton, L. Giosan, T.I. Eglinton, D.Q. Fuller, J.E. Johnson, P. Kumar, Timothy S. Collett
2012, Geophysical Research Letters (39)
Spanning a latitudinal range typical for deserts, the Indian peninsula is fertile instead and sustains over a billion people through monsoonal rains. Despite the strong link between climate and society, our knowledge of the long‐term monsoon variability is incomplete over the Indian subcontinent. Here we reconstruct the Holocene paleoclimate in...
Grizzly bear population vital rates and trend in the Northern Continental Divide Ecosystem, Montana
R.D. Mace, D.W. Carney, T. Chilton-Radandt, S.A. Courville, M.A. Haroldson, R.B. Harris, J. Jonkel, B. McLellan, M. Madel, T.L. Manley, C.C. Schwartz, C. Servheen, G. Stenhouse, J.S. Waller, E. Wenum
2012, Journal of Wildlife Management (76) 119-128
We estimated grizzly bear (Ursus arctos) population vital rates and trend for the Northern Continental Divide Ecosystem (NCDE), Montana, between 2004 and 2009 by following radio-collared females and observing their fate and reproductive performance. Our estimates of dependent cub and yearling survival were 0.612 (95% CI = 0.300–0.818) and 0.682 (95% CI = 0.258–0.898)....
Modifications to the conduit flow process mode 2 for MODFLOW-2005
Thomas Reimann, S. Birk, C. Rehrl, W. Barclay Shoemaker
2012, Ground Water (50) 144-148
As a result of rock dissolution processes, karst aquifers exhibit highly conductive features such as caves and conduits. Within these structures, groundwater flow can become turbulent and therefore be described by nonlinear gradient functions. Some numerical groundwater flow models explicitly account for pipe hydraulics by coupling the continuum model with...
Gender and occupational perspectives on adaptation to climate extremes in the Afram Plains of Ghana
Samuel N.A. Codjoe, Lucy K. Atidoh, Virginia Burkett
2012, Climatic Change (110) 431-454
Although sub-Saharan Africa does not contribute significantly to greenhouse gas emissions, significant adverse impacts of climate change are anticipated in this region. Countries in West Africa, which are heavily dependent on rain-fed agriculture, are projected to experience more frequent and intense droughts, altered rainfall patterns and increases in temperature through...
Life history of the fluted kidneyshell Ptychobranchus subtentum
V.M. Davis, J.B. Layzer
2012, American Midland Naturalist (167) 79-95
The fluted kidneyshell Ptychobranchus subtentum (Say, 1825) is a candidate for listing under the Endangered Species Act by the US Fish and Wildlife Service. Fecundity, fish hosts, and selected population demographics were determined during 2005–2006 for the fluted kidneyshell in the upper Clinch River, Hancock County, Tennessee. Females were fertilized in Aug....
An investigation of element ratios for assessing suspended-sediment sources in small agricultural basins
K. Juracek
2012, Physical Geography (33) 50-67
Various sediment properties previously have been investigated for the purpose of determining sources of suspended sediment. A remaining research need is an assessment of element ratios for the determination of suspended-sediment sources in different terrestrial environments. In this study, 253 element ratios were assessed to determine which, if any, were...
Using multitemporal remote sensing imagery and inundation measures to improve land change estimates in coastal wetlands
Y.C. Allen, B.R. Couvillion, J.A. Barras
2012, Estuaries and Coasts (35) 190-200
Remote sensing imagery can be an invaluable resource to quantify land change in coastal wetlands. Obtaining an accurate measure of land change can, however, be complicated by differences in fluvial and tidal inundation experienced when the imagery is captured. This study classified Landsat imagery from two wetland areas in coastal...
Recent paleorecords document rising mercury contamination in Lake Tanganyika
Christopher H. Conaway, Peter W. Swarzenski, A.S. Cohen
2012, Applied Geochemistry (27) 352-359
Recent Lake Tanganyika Hg deposition records were derived using 14C and excess 210Pb geochronometers in sediment cores collected from two contrasting depositional environments: the Kalya Platform, located mid-lake and more removed from watershed impacts, and the Nyasanga/Kahama River delta region, located close to the lake’s shoreline north of Kigoma. At the Kalya...
Patterns of mortality in free-ranging California condors (Gymnogyps californianus)
B.A. Rideout, I. Stalis, R. Papendick, A. Pessier, B. Puschner, M.E. Finkelstein, D. R. Smith, Matthew Johnson, M. Mace, R. Stroud, J. Brandt, J. Burnett, C. Parish, J. Petterson, C. Witte, C. Stringfield, K. Orr, J. Zuba, M. Wallace, J. Grantham
2012, Journal of Wildlife Diseases (48) 95-112
We document causes of death in free-ranging California Condors (Gymnogyps californianus) from the inception of the reintroduction program in 1992 through December 2009 to identify current and historic mortality factors that might interfere with establishment of self-sustaining populations in the wild. A total of 135 deaths occurred from October 1992...
Initiation of long-term coupled microbiological, geochemical, and hydrological experimentation within the seafloor at North Pond, western flank of the Mid-Atlantic Ridge
K.J. Edwards, N. Backert, W. Bach, K. Becker, A. Klaus, Dale W. Griffin, L. Anderson, A.G. Haddad, Y. Harigane, P.L. Campion, H. Hirayama, H.J. Mills, S.M. Hulme, K. Nakamura, S.L. Jorgensen, B. Orcutt, T.L. Insua, Y.-S. Park, V. Rennie, E.C. Salas, O. Rouxel, F. Wang, J.A. Russel, C.G. Wheat, K. Sakata, M. Brown, J.L. Magnusson, Z. Ettlinger
2012, Integrated Ocean Drilling Program: Preliminary Reports 1-72
Integrated Ocean Drilling Program (IODP) Expedition 336 successfully initiated subseafloor observatory science at a young mid-ocean-ridge flank setting. All of the drilled sites are located in the North Pond region of the Atlantic Ocean (22°45′N, 46°05′W) in 4414–4483 m water depth. This area is known from previous ocean drilling and...
Tropical forests in a warming world
S.C. Reed, T.E. Wood, M.A. Cavaleri
2012, New Phytologist (193) 27-29
Identifying fluorescent pulp mill effluent in the Gulf of Maine and its watershed
Kaelin M. Cawley, Kenna D. Butler, George R. Aiken, Laurel G. Larsen, Thomas G. Huntington, Diane M. McKnight
2012, Marine Pollution Bulletin (64) 1678-1687
Using fluorescence spectroscopy and parallel factor analysis (PARAFAC) we characterized and modeled the fluorescence properties of dissolved organic matter (DOM) in samples from the Penobscot River, Androscoggin River, Penobscot Bay, and the Gulf of Maine (GoM). We analyzed excitation-emission matrices (EEMs) using an existing PARAFAC model (Cory and McKnight, 2005)...
Upper Klamath Basin Landsat Image for October 7, 2004: Path 45 Rows 30 and 31
Daniel T. Snyder
2012, Report
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing...
Upper Klamath Basin Landsat Image for September 30, 2004: Path 44 Row 31
Daniel T. Snyder
2012, Report
This subset of a Landsat-5 image shows part of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing...
Progress report geologic map of the Grouse Creek 30' x 60' quadrangle, and Utah part of the Jackpot 30' x 60' quadrangle, Box Elder County, Utah, and Cassia County, Idaho (Year 3 of 4);
David M. Miller, Donald L. Clark, Michael L. Wells, Charles G. Oviatt, Tracey J. Felger, Victoria R. Todd
2012, Utah Geological Survey Open-File Report 598
No abstract available....
Microsatellite genetic diversity and differentiation of native and introduced grass carp populations in three continents
Duane Chapman, Q. Chen, Chenghui Wang, Jinlian Zhao, Guoqing Lu, Jeney Zsigmond, Si-Fa Li
2012, Genetica (140) 115-123
Grass carp (Ctenopharyngodon idella), a freshwater species native to China, has been introduced to about 100 countries/regions and poses both biological and environmental challenges to the receiving ecosystems. In this study, we analyzed genetic variation in grass carp from three introduced river systems (Mississippi River Basin in US,...
Panarchy
Ahjond S. Garmestani, Craig R. Allen
Abdel H. El-Shaarawi, Walter W. Piegorsch, editor(s)
2012, Book chapter, Encyclopedia of environmetrics
Panarchy is the term coined to describe hierarchical systems where control is not only top down, as typically considered, but also bottom up. A panarchy is composed of adaptive cycles, and an adaptive cycle describes the processes of development and decay in a system. Complex systems self-organize into hierarchies because...
Digital elevation models
Karl Heidemann
Michael S. Renslow, editor(s)
2012, Book chapter, Manual of airborne topographic lidar
Design and implementation of the next generation Landsat satellite communications system
Grant R. Mah, Michael O’Brien, Howard Garon, Claire Mott, Alan Ames, Ken Dearth
2012, Conference Paper, Proceedings from the International Telemetering Conference
The next generation Landsat satellite, Landsat 8 (L8), also known as the Landsat Data Continuity Mission (LDCM), uses a highly spectrally efficient modulation and data formatting approach to provide large amounts of downlink (D/L) bandwidth in a limited X-Band spectrum allocation. In addition to purely data throughput and bandwidth considerations,...
Measuring rotational ground motions in seismological practice
William H. K. Lee, John R. Evans, B. S. Huang, C. R. Hutt, C.-J. Lin, C.-C. Liu, R. L. Nigbor
2012, Book chapter, New Manual of Seismological Observatory Practice 2 (NMSOP-2)
No abstract available....
The origins of Late Quaternary debris avalanche and debris flow deposits from Cofre de Perote volcano, México
Rodolfo Diaz-Castellon, Bernard E. Hubbard, Gerardo Carrasco-Nunez, Jose Luis Rodriguez-Vargas
2012, Geosphere (8) 950-971
Cofre de Perote volcano is a compound, shield-like volcano located in the northeastern Trans-Mexican volcanic belt. Large debris avalanche and lahar deposits are associated with the evolution of Cofre. The two best preserved of these debris-avalanche and debris-flow deposits are the ∼42 ka “Los Pescados debris flow” deposit and...
