The lacustrine carbon cycle as illuminated by the waters and sediments of two hydrologically distinct headwater lakes in north-central Minnesota, U.S.A
Walter E. Dean, Antje Schwalb
2002, Journal of Sedimentary Research (72) 416-431
The accumulation rates of CaCO3 and organic carbon (OC) in lake sediments are delicately balanced between production in the epilimnion and destruction in the hypolimnion. The cycling of these two forms of carbon makes a "carbon pump" that greatly affects the biogeochemical cycles of other elements. To further understand these biogeochemical...
To sell or not sell: Assessments of Bangladesh hydrocarbons
Robert C. Milici, Peter D. Warwick, Emil D. Attanasi, Craig J. Wandrey
2002, Oil & Gas Journal (100) 24-28
A decision by the government of Bangladesh to sell or not sell some of its natural gas reserves to neighboring countries in South Asia will be important in determining the economic future of Bangladesh, a country with an area about equal to Wisconsin.Bangladesh is a country of 150 million people,...
Mapping the sources of the seismic wave field at Kilauea volcano, Hawaii, using data recorded on multiple seismic Antennas
J. Almendros, B. Chouet, P. Dawson, Caleb G. Huber
2002, Bulletin of the Seismological Society of America (92) 2333-2351
Seismic antennas constitute a powerful tool for the analysis of complex wave fields. Well-designed antennas can identify and separate components of a complex wave field based on their distinct propagation properties. The combination of several antennas provides the basis for a more complete understanding of volcanic wave fields, including an...
Comment on "How fast is rupture during an earthquake? New insights from the 1999 Turkey earthquakes"
D.J. Andrews
2002, Geophysical Research Letters (29) 9-1-9-4
No abstract available....
Maturation and fecundity of a stock-enhanced population of striped bass in the Savannah River Estuary, U.S.A.
T.A. Will, T.R. Reinert, Cecil A. Jennings
2002, Journal of Fish Biology (60) 532-544
The striped bass Morone saxatilis population in the Savannah River (south-eastern U.S.A.) collapsed in the 1980s, and recent efforts to restore the population have resulted in increased catch-per-unit-effort (CPUE) of striped bass in the Savannah River Estuary (SRE). The abundance of eggs and larvae, however, remain well below historic levels....
Breeding behavior and reproductive life history of the Neosho Madtom, Noturus placidus (Teleostei: Ictaluridae)
Angela G. Bulger, Christopher D. Wilkinson, David R. Edds, Mark L. Wildhaber
2002, Transactions of the Kansas Academy of Science (105) 106-124
The Neosho madtom, Noturus placidus, is a small catfish listed by the U. S. Fish and Wildlife Service as threatened. Little is known of its breeding biology and behavior because high turbidity and flow during its spawning season prevent direct observation in the field, and captive propagation has met with...
Evaluation of a habitat suitability index model
A.H. Farmer, B.S. Cade, D.F. Stauffer
2002, Conference Paper, Indiana Bat: Biology and Management of an Endangered Species
We assisted with development of a model for maternity habitat of the Indiana bat (Myotis soda/is), for use in conducting assessments of projects potentially impacting this endangered species. We started with an existing model, modified that model in a workshop, and evaluated the revised model, using data previously collected by...
Success of the North Umpqua River relicensing negotiation: A completion report
B. L. Lamb, S. Gillette, N. Burkardt, J. G. Taylor
2002, Report
No abstract available....
Implications of water supply for indigenous Americans during Holocene ardity phases on the Southern High Plains, USA
W.W. Wood, S. Stokes, J. Rich
2002, Quaternary Research (58) 139-148
Springs in the 40 to 50 large lake basins (>15 km2) on the southern portion of the Southern High Plains (SHP) were active during periods of aridity in the Holocene when there may have been human habitation of the area. Eolian erosion of the lake floors and lunette accretion occurred...
Monitoring of Lost River and shortnose suckers in Upper Klamath Lake, Oregon
E.C. Janney, B.S. Hayes, R.S. Shively, T.J. Tyler, G.N. Blackwood
2002, Report
Abstract not available ...
Response of the San Andreas fault to the 1983 Coalinga-Nuñez earthquakes: an application of interaction-based probabilities for Parkfield
Shinji Toda, Ross S. Stein
2002, Journal of Geophysical Research B: Solid Earth (107) ESE 6-1-ESE 6-16
The Parkfield-Cholame section of the San Andreas fault, site of an unfulfilled earthquake forecast in 1985, is the best monitored section of the world's most closely watched fault. In 1983, the M = 6.5 Coalinga and M = 6.0 Nuñez events struck 25 km northeast of Parkfield. Seismicity rates climbed for 18 months along...
The 12 September 1999 Upper East Rift Zone dike intrusion at Kilauea Volcano, Hawaii
Peter Cervelli, P. Segall, F. Amelung, H. Garbeil, C. Meertens, S. Owen, Asta Mikijus, M. Lisowski
2002, Journal of Geophysical Research B: Solid Earth (107) ECV 3-1-ECV 3-13
Deformation associated with an earthquake swarm on 12 September 1999 in the Upper East Rift Zone of Kilauea Volcano was recorded by continuous GPS receivers and by borehole tiltmeters. Analyses of campaign GPS, leveling data, and interferometric synthetic aperture radar (InSAR) data from the ERS-2 satellite also reveal significant deformation...
Custom analysis; a winning proposition for customers and the National Laboratory
Mark R. Burkhardt
2002, Conference Paper, Water Logs - National Water Quality Laboratory Newsletter
Subsidence at Kiska volcano, Western Aleutians, detected by satellite radar interferometry
Z. Lu, Timothy Masterlark, J. Power, D. Dzurisin, Charles Wicks
2002, Geophysical Research Letters (29) 2-1-2-4
Sequential interferometric synthetic aperture radar images of Kiska, the westernmost historically active volcano in the Aleutian arc, show that a circular area about 3 km in diameter centered near the summit subsided by as much as 10 cm from 1995 to 2001, mostly during 1999 and 2000. An elastic Mogi-type...
A Holocene paleosecular variation from 14C-dated volcanic rocks in western North America
Jonathan T. Hagstrum, Duane E. Champion
2002, Journal of Geophysical Research B: Solid Earth (107) EPM 8-1-EPM 8-14
A paleosecular variation (PSV) curve for western North America is presented on the basis of 94 virtual geomagnetic poles (VGPs) from dated volcanic rocks sampled at 446 sites. Approximately 60% of the paleomagnetic database has been previously published. A curve defined by “spherical smoothed splines” is fitted to the VGPs,...
Comparison of an algebraic multigrid algorithm to two iterative solvers used for modeling ground water flow and transport
R.L. Detwiler, S. Mehl, H. Rajaram, W.W. Cheung
2002, Ground Water (40) 267-272
Numerical solution of large-scale ground water flow and transport problems is often constrained by the convergence behavior of the iterative solvers used to solve the resulting systems of equations. We demonstrate the ability of an algebraic multigrid algorithm (AMG) to efficiently solve the large, sparse systems of equations that result...
Isotope-abundance variations of selected elements (IUPAC technical report)
T.B. Coplen, J.K. Böhlke, P. De Bievre, T. Ding, N.E. Holden, J.A. Hopple, H.R. Krouse, A. Lamberty, H.S. Peiser, K. Revesz, S.E. Rieder, K.J.R. Rosman, E. Roth, P.D.P. Taylor, R.D. Vocke Jr., Y.K. Xiao
2002, Pure and Applied Chemistry (74) 1987-2017
Documented variations in the isotopic compositions of some chemical elements are responsible for expanded uncertainties in the standard atomic weights published by the Commission on Atomic Weights and Isotopic Abundances of the International Union of Pure and Applied Chemistry. This report summarizes reported variations in the isotopic compositions of 20...
Effects of topography on the transport of agricultural chemicals to groundwater in a sand-plain setting
G. N. Delin, M.K. Landon
2002, Hydrogeology Journal (10) 443-454
Geochemical data were collected to investigate the effects of topography and focused recharge on the transport of agricultural chemicals to groundwater through sandy soils. The research was done at a topographically high (upland) site and a depressional (lowland) site within a corn field. Agricultural chemicals that move readily with water...
Behavioural and physiological response of trout to winter habitat in tailwaters in Wyoming, USA
T.C. Annear, W. Hubert, D. Simpkins, L. Hebdon
2002, Hydrological Processes (16) 915-925
Fisheries managers have often suggested that survival of trout during the winter is a major factor affecting population densities in many stream ecosystems in the Rocky Mountains. In Wyoming, trout population reductions from fall to spring in excess of 90% have been documented in some reservoir tailwaters. Though biologists have...
Novirhabdovirus
J.C. Leong, G. Kurath
2002, Book chapter, Chapter in The Springer Index of Viruses
Abstract not available ...
Mercury methylation at mercury mines in the Humboldt River Basin, Nevada, USA
J. E. Gray, J.G. Crock, B.K. Lasorsa
2002, Geochemistry: Exploration, Environment, Analysis (2) 143-149
Total Hg and methylmercury concentrations were measured in mine-waste calcines (retorted ore), sediment, and water samples collected in and around abandoned mercury mines in western Nevada to evaluate Hg methylation at the mines and in the Humboldt River Basin. Mine-waste calcines contain total Hg concentrations as high as 14 000...
Development of the permeability/performance reference compound approach for in situ calibration of semipermeable membrane devices
J.N. Huckins, J. D. Petty, J.A. Lebo, F.V. Almeida, K. Booij, D.A. Alvarez, W.L. Cranor, R.C. Clark, B.B. Mogensen
2002, Environmental Science & Technology (36) 85-91
Permeability/performance reference compounds (PRCs) are analytically noninterfering organic compounds with moderate to high fugacity from semipermeable membrane devices (SPMDs) that are added to the lipid prior to membrane enclosure. Assuming that isotropic exchange kinetics (IEK) apply and that SPMD-water partition coefficients are known, measurement of PRC dissipation rate constants during...
Investigations of potential bias in the estimation of lambda using Pradel's (1996) model for capture-recapture data
James E. Hines, James D. Nichols
2002, Journal of Applied Statistics (29) 573-587
Pradel's (1996) temporal symmetry model permitting direct estimation and modelling of population growth rate, u i , provides a potentially useful tool for the study of population dynamics using marked animals. Because of its recent publication date, the approach has not seen much use, and there have been virtually no...
Simulation of the mobility of metal-EDTA complexes in groundwater: The influence of contaminant metals
J.C. Friedly, D.B. Kent, J.A. Davis
2002, Environmental Science & Technology (36) 355-363
Reactive transport simulations were conducted to model chemical reactions between metal−EDTA (ethylenediaminetetraacetic acid) complexes during transport in a mildly acidic quartz−sand aquifer. Simulations were compared with the results of small-scale tracer tests wherein nickel−, zinc−, and calcium−EDTA complexes and free EDTA were injected into three distinct chemical...
Water quality in shallow alluvial aquifers, Upper Colorado River Basin, Colorado, 1997
Lori E. Apodaca, J. B. Bails, C. Michelle Smith
2002, Journal of the American Water Resources Association (38) 133-149
Shallow ground water in areas of increasing urban development within the Upper Colorado River Basin was sampled for inorganic and organic constituents to characterize water-quality conditions and to identify potential anthropogenic effects resulting from development. In 1997, 25 shallow monitoring wells were installed and sampled in five areas of urban...
