Mapping and improving frequency, accuracy, and interpretation of land cover change: Classifying coastal Louisiana with 1990, 1993, 1996, and 1999 Landsat Thematic Mapper image data
G. Nelson, Elijah W. Ramsey III, A. Rangoonwala
2005, Conference Paper, Proceedings of the Third International Workshop on the Analysis of Multi-Temporal Remote Sensing Images 2005
Landsat Thematic Mapper images and collateral data sources were used to classify the land cover of the Mermentau River Basin within the chenier coastal plain and the adjacent uplands of Louisiana, USA. Landcover classes followed that of the National Oceanic and Atmospheric Administration's Coastal Change Analysis Program; however, classification methods...
Edge and area effects on the occurrence of migrant forest songbirds
T.H. Parker, B.M. Stansberry, C.D. Becker, P. S. Gipson
2005, Conservation Biology (19) 1157-1167
Concerns about forest fragmentation and its conservation implications have motivated numerous studies that investigate the influence of forest patch area and forest edge on songbird distribution patterns. The generalized effects of forest patch size and forest edge on animal distributions is still debatable because forest patch size and forest edge...
Genetic diversity, kinship analysis, and broodstock management of captive Atlantic sturgeon for population restoration
A.P. Henderson, A.P. Spidle, T.L. King
2005, American Fisheries Society Symposium (2005) 621-633
Captive Atlantic sturgeon Acipenser oxyrinchus considered for use as broodstock in a restoration program were genotyped using nuclear DNA microsatellites and compared to wild collections from the Hudson River, New York (source of parents of the captive sturgeon) and from Albemarle Sound, North Carolina. Because the potential broodfish were the...
Palaeohydrology of the Southwest Yukon Territory, Canada, based on multiproxy analyses of lake sediment cores from a depth transect
L. Anderson, M.B. Abbott, B. P. Finney, M. E. Edwards
2005, Holocene (15) 1172-1183
Lake-level variations at Marcella Lake, a small, hydrologically closed lake in the southwestern Yukon Territory, document changes in effective moisture since the early Holocene. Former water levels, driven by regional palaeohydrology, were reconstructed by multiproxy analyses of sediment cores from four sites spanning shallow to deep water. Marcella Lake today...
Part 1: Vadose-zone column studies of toluene (enhanced bioremediation) in a shallow unconfined aquifer
J.A. Tindall, M.J. Friedel, R.J. Szmajter, S.M. Cuffin
2005, Water, Air, & Soil Pollution (168) 325-357
The objectives of the laboratory study described in this paper were (1) to determine the effectiveness of four nutrient solutions and a control in stimulating the microbial degradation of toluene in the unsaturated zone as an alternative to bioremediation methodologies such as air sparging, in situ vitrification, or others...
Ocean science: Radiocarbon variability in the western North Atlantic during the last deglaciation
L.F. Robinson, J.F. Adkins, L.D. Keigwin, J. Southon, D. P. Fernandez, S.-L. Wang, D.S. Scheirer
2005, Science (310) 1469-1473
We present a detailed history of glacial to Holocene radiocarbon in the deep western North Atlantic from deep-sea corals and paired benthic-planktonic foraminifera. The deglaciation is marked by switches between radiocarbon-enriched and -depleted waters, leading to large radiocarbon gradients in the water column. These changes played an important role in...
Task committee on experimental uncertainty and measurement errors in hydraulic engineering: An update
B. Wahlin, T. Wahl, J. A. Gonzalez-Castro, J. Fulford, M. Robeson
2005, Conference Paper, World Water Congress 2005: Impacts of Global Climate Change - Proceedings of the 2005 World Water and Environmental Resources Congress
As part of their long range goals for disseminating information on measurement techniques, instrumentation, and experimentation in the field of hydraulics, the Technical Committee on Hydraulic Measurements and Experimentation formed the Task Committee on Experimental Uncertainty and Measurement Errors in Hydraulic Engineering in January 2003. The overall mission of this...
Uncertainty and research needs for supplementing wild populations of anadromous Pacific salmon
R.R. Reisenbichler
2005, American Fisheries Society Symposium (2005) 263-275
Substantial disagreement and uncertainty attend the question of whether the benefits from supplementing wild populations of anadromous salmonids with hatchery fish outweigh the risks. Prudent decisions about supplementation are most likely when the suite of potential benefits and hazards and the various sources of uncertainty are explicitly identified. Models help...
Use of XML and Java for collaborative petroleum reservoir modeling on the Internet
J. Victorine, W.L. Watney, S. Bhattacharya
2005, Computers & Geosciences (31) 1151-1164
The GEMINI (Geo-Engineering Modeling through INternet Informatics) is a public-domain, web-based freeware that is made up of an integrated suite of 14 Java-based software tools to accomplish on-line, real-time geologic and engineering reservoir modeling. GEMINI facilitates distant collaborations for small company and academic clients, negotiating analyses of both single and...
Postseismic deformation following the June 2000 earthquake sequence in the south Iceland seismic zone
T. Arnadottir, Sigurjon Jonsson, F. F. Pollitz, W. Jiang, K.L. Feigl
2005, Journal of Geophysical Research B: Solid Earth (110) 1-13
We observe postseismic deformation on two spatiotemporal scales following Mw = 6.5 earthquakes in the south Iceland seismic zone on 17 and 21 June 2000. We see a rapidly decaying deformation transient lasting no more than 2 months and extending about 5 km away from the two main shock ruptures....
Earthquake fracture energy inferred from kinematic rupture models on extended faults
E. Tinti, P. Spudich, M. Cocco
2005, Journal of Geophysical Research B: Solid Earth (110) 1-25
We estimate fracture energy on extended faults for several recent earthquakes by retrieving dynamic traction evolution at each point on the fault plane from slip history imaged by inverting ground motion waveforms. We define the breakdown work (Wb) as the excess of work over some minimum traction level achieved during...
An efficient algorithm for double-difference tomography and location in heterogeneous media, with an application to the Kilauea volcano
V. Monteiller, J.-L. Got, J. Virieux, P. Okubo
2005, Journal of Geophysical Research B: Solid Earth (110) 1-22
Improving our understanding of crustal processes requires a better knowledge of the geometry and the position of geological bodies. In this study we have designed a method based upon double-difference relocation and tomography to image, as accurately as possible, a heterogeneous medium containing seismogenic objects. Our approach consisted not only...
An integrated environmental tracer approach to characterizing groundwater circulation in a mountain block
Andrew H. Manning, D. Kip Solomon
2005, Water Resources Research (41)
The subsurface transfer of water from a mountain block to an adjacent basin (mountain block recharge (MBR)) is a commonly invoked mechanism of recharge to intermountain basins. However, MBR estimates are highly uncertain. We present an approach to characterize bulk fluid circulation in a mountain block and thus MBR that...
Effects of body size, condition, and lipid content on the survival of juvenile lake herring during rapid cooling events
Kevin L. Pangle, Trent M. Sutton, Ronald E. Kinnunen, Michael H. Hoff
2005, Journal of Great Lakes Research (31) 360-366
Juvenile lake herring Coregonus artedi were exposed to rapid cooling events during two laboratory experiments to determine the effects of body size, physiological condition, and lipid content on survival. The first experiment was conducted at the onset of winter, exposing small (50 to 85 mm) and large (85 to 129 mm) fish...
The evolution of Titan's mid-latitude clouds
C.A. Griffith, P. Penteado, K. Baines, P. Drossart, J. Barnes, G. Bellucci, J. Bibring, R. Brown, B. Buratti, F. Capaccioni, P. Cerroni, R. Clark, M. Combes, A. Coradini, D. Cruikshank, V. Formisano, R. Jaumann, Y. Langevin, D. Matson, T. McCord, V. Mennella, R. Nelson, P. Nicholson, B. Sicardy, Christophe Sotin, L.A. Soderblom, R. Kursinski
2005, Science (310) 474-477
Spectra from Cassini's Visual and Infrared Mapping Spectrometer reveal that the horizontal structure, height, and optical depth of Titan's clouds are highly, dynamic. Vigorous cloud centers are seen to rise from the middle to the upper troposphere within 30 minutes and dissipate within the next hour. Their development indicates that...
Implications of invasion by Juniperus virginiana on small mammals in the southern Great Plains
V.J. Horncastle, E. C. Hellgren, P.M. Mayer, A.C. Ganguli, David M. Engle, David M. Leslie Jr.
2005, Journal of Mammalogy (86) 1144-1155
Changes in landscape cover in the Great Plains are resulting from the range expansion and invasion of eastern red cedar (Juniperus virginiana). By altering the landscape and local vegetation, red cedar is changing the structure and function of habitat for small mammals. We examined effects of invasion by eastern red...
Phylogeographic patterns of Hawaiian Megalagrion damselflies (Odonata: Coenagrionidae) correlate with Pleistocene island boundaries
Stephen A. Jordan, C. Simon, D. Foote, R.A. Englund
2005, Molecular Ecology (14) 3457-3470
The Pleistocene geological history of the Hawaiian Islands is becoming well understood. Numerous predictions about the influence of this history on the genetic diversity of Hawaiian organisms have been made, including the idea that changing sea levels would lead to the genetic differentiation of populations isolated on individual volcanoes during...
Rainfall-runoff in the Albuquerque, New Mexico, area: Measurements, analyses and comparisons
C.E. Anderson, T.J. Ward, T. Kelly
Moglen G.E., editor(s)
2005, Conference Paper, Proceedings of the 2005 Watershed Management Conference - Managing Watersheds for Human and Natural Impacts: Engineering, Ecological, and Economic Challenges
Albuquerque, New Mexico, has experienced significant growth over the last 20 years like many other cities in the Southwestern United States. While the US population grew by 37% between the 1970 and 2000 censuses, the growth for Albuquerque was 83%. More people mean more development and increased problems of managing...
An evaluation of sampling strategies to improve precision of estimates of gross change in land use and land cover
S.V. Stehman, Terry L. Sohl, Thomas R. Loveland
2005, International Journal of Remote Sensing (26) 4941-4957
Statistical sampling offers a cost-effective, practical alternative to complete-coverage mapping for the objective of estimating gross change in land cover over large areas. Because land cover change is typically rare, the sampling strategy must take advantage of design and analysis tools that enhance precision. Using two populations of land cover...
Time-dependent seismic tomography of the Coso geothermal area, 1996-2004
B.R. Julian, G.R. Foulger
2005, Conference Paper, Transactions - Geothermal Resources Council
The permanent 18-station network of three-component digital seismometers at the seismically active Coso geothermal area, California, provides high-quality microearthquake (MEQ) data that are well suited to investigating temporal variations in structure related to processes within the geothermal reservoir. A preliminary study [Julian, et al., 2003; Julian, et al., 2004] comparing...
The Ames MER microscopic imager toolkit
R. Sargent, Matthew Deans, C. Kunz, M. Sims, K. Herkenhoff
2005, Conference Paper, IEEE Aerospace Conference Proceedings
12The Mars Exploration Rovers, Spirit and Opportunity, have spent several successful months on Mars, returning gigabytes of images and spectral data to scientists on Earth. One of the instruments on the MER rovers, the Athena Microscopic Imager (MI), is a fixed focus, megapixel camera providing a ??3mm depth of field...
Rhizosphere iron (III) deposition and reduction in a Juncus effusus L.-dominated wetland
J.V. Weiss, D. Emerson, J.P. Megonigal
2005, Soil Science Society of America Journal (69) 1861-1870
Iron (III) plaque forms on the roots of wetland plants from the reaction of Fe(II) with O2 released by roots. Recent laboratory studies have shown that Fe plaque is more rapidly reduced than non-rhizosphere Fe(III) oxides. The goals of the current study were to determine in situ rates of: (i)...
Assessing the vulnerability of a municipal well field to contamination in a karst aquifer
R.A. Renken, K.J. Cunningham, M.R. Zygnerski, M.A. Wacker, A.M. Shapiro, R.W. Harvey, D.W. Metge, C.L. Osborn, J. N. Ryan
2005, Environmental & Engineering Geoscience (11) 319-331
Proposed expansion of extractive lime-rock mines near the Miami-Dade County Northwest well field and Everglades wetland areas has garnered intense scrutiny by government, public, environmental stakeholders, and the media because of concern that mining will increase the risk of pathogen contamination. Rock mines are excavated to the same depth as...
Elevated mercury concentrations in failed eggs of Snowy Plovers at Point Reyes National Seashore
S.E. Schwarzbach, M. Stephenson, T. Ruhlen, S. Abbott, G. W. Page, D. Adams
2005, Marine Pollution Bulletin (50) 1444-1447
[No abstract available]...
Simulation of integrated surface-water/ground-water flow and salinity for a coastal wetland and adjacent estuary
C. Langevin, E. Swain, M. Wolfert
2005, Journal of Hydrology (314) 212-234
The SWIFT2D surface-water flow and transport code, which solves the St Venant equations in two dimensions, was coupled with the SEAWAT variable-density ground-water code to represent hydrologic processes in coastal wetlands and adjacent estuaries. A sequentially coupled time-lagged approach was implemented, based on a variable-density form of Darcy's Law, to...
