Palynology in coal systems analysis-The key to floras, climate, and stratigraphy of coal-forming environments
D. J. Nichols
2005, Special Paper of the Geological Society of America 51-58
Palynology can be effectively used in coal systems analysis to understand the nature of ancient coal-forming peat mires. Pollen and spores preserved in coal effectively reveal the floristic composition of mires, which differed substantially through geologic time, and contribute to determination of depositional environment and paleo- climate. Such applications are...
Dynamic modeling of Tampa Bay urban development using parallel computing
G. Xian, M. Crane, D. Steinwand
2005, Computers & Geosciences (31) 920-928
Urban land use and land cover has changed significantly in the environs of Tampa Bay, Florida, over the past 50 years. Extensive urbanization has created substantial change to the region's landscape and ecosystems. This paper uses a dynamic urban-growth model, SLEUTH, which applies six geospatial data themes (slope, land use,...
A note on the comparative turbidity of some estuaries of the Americas
R.J. Uncles, R. E. Smith
2005, Journal of Coastal Research (21) 845-852
Field data from 27 estuaries of the Americas are used to show that, in broad terms, there is a large difference in turbidity between the analyzed east and west-coast estuaries and that tidal range and tidal length have an important influence on that turbidity. Generic, numerical sediment-transport modeling is used...
The accuracy of matrix population model projections for coniferous trees in the Sierra Nevada, California
P. J. van Mantgem, N.L. Stephenson
2005, Journal of Ecology (93) 737-747
1 We assess the use of simple, size-based matrix population models for projecting population trends for six coniferous tree species in the Sierra Nevada, California. We used demographic data from 16 673 trees in 15 permanent plots to create 17 separate time-invariant, density-independent population projection models, and determined differences between...
Nonlinear regression modeling of nutrient loads in streams: A Bayesian approach
Song S. Qian, Kenneth H. Reckhow, Jun Zhai, Gerard McMahon
2005, Water Resources Research (41)
A Bayesian nonlinear regression modeling method is introduced and compared with the least squares method for modeling nutrient loads in stream networks. The objective of the study is to better model spatial correlation in river basin hydrology and land use for improving the model as a forecasting tool. The Bayesian...
Temporal changes in the vertical distribution of flow and chloride in deep wells
John A. Izbicki, Allen H. Christensen, Mark W. Newhouse, Gregory A. Smith, Randall T. Hanson
2005, Ground Water (43) 531-544
The combination of flowmeter and depth-dependent water-quality data was used to evaluate the quantity and source of high-chloride water yielded from different depths to eight production wells in the Pleasant Valley area of southern California. The wells were screened from 117 to 437 m below land surface, and in most...
A new approach for predicting drought-related vegetation stress: Integrating satellite, climate, and biophysical data over the U.S. central plains
Tsegaye Tadesse, Jesslyn F. Brown, M.J. Hayes
2005, ISPRS Journal of Photogrammetry and Remote Sensing (59) 244-253
Droughts are normal climate episodes, yet they are among the most expensive natural disasters in the world. Knowledge about the timing, severity, and pattern of droughts on the landscape can be incorporated into effective planning and decision-making. In this study, we present a data mining approach to modeling vegetation stress...
Sensitivity analysis of conservative and reactive stream transient storage models applied to field data from multiple-reach experiments
M.N. Gooseff, K.E. Bencala, D.T. Scott, R.L. Runkel, Diane M. McKnight
2005, Advances in Water Resources (28) 479-492
The transient storage model (TSM) has been widely used in studies of stream solute transport and fate, with an increasing emphasis on reactive solute transport. In this study we perform sensitivity analyses of a conservative TSM and two different reactive solute transport models...
Outgassing models for Landsat-4 thematic mapper short wave infrared bands
E. Micijevic, D. L. Helder
Butler J.J., editor(s)
2005, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
Detector responses to the Internal Calibrator (IC) pulses in the Landsat-4 Thematic Mapper (TM) have been observed to follow an oscillatory behavior. This phenomenon is present only in the Short Wave Infrared (SWIR) bands and has been observed throughout the lifetime of the instrument, which was launched in July 1982...
An updated rate-of-spread clock
Jeremy Kolaks, Keith W. Grabner, George Hartman, Bruce E. Cutter, Edward F. Loewenstein
2005, Fire Management Today (65) 26-27
Several years ago, Blank and Simard (1983) described an electronic timer, frequently referred to as a rate-of-spread (ROS) clock—a relatively simple instrument used in measuring fire spread. Although other techniques for measuring rate of spread are available (such as data loggers), the basic ROS clock remains a valuable and relatively...
Summary of dimensionless Texas hyetographs and distribution of storm depth developed for Texas Department of Transportation research project 0–4194
William H. Asquith, Meghan C. Roussel, David B. Thompson, Theodore G. Cleveland, Xing Fang
2005, Report
Hyetographs and storm depth distributions are important elements of hydraulic design by Texas Department of Transportation engineers. Design hyetographs are used in conjunction with unit hydrographs to obtain peak discharge and hydrograph shape for hydraulic design. Storm-depth distributions can be used to assess the probability of a total rainfall depth...
Dating offset fans along the Mojave section of the San Andreas fault using cosmogenic 26Al and 10Be
A. Matmon, David P. Schwartz, R. Finkel, S. Clemmens, T. Hanks
2005, Geological Society of America Bulletin (117) 795-807
Analysis of cosmogenic 10Be and 26Al in samples collected from exposed boulders (n = 20) and from buried sediment (n = 3) from offset fans along the San Andreas fault near Little Rock, California, yielded ages, ranging from 16 to 413 ka, which increase with distance from their source at...
Preliminary evaluation of a lake whitefish (Coregonus clupeaformis) bioenergetics model
Charles P. Madenjian, Steven A. Pothoven, Philip J. Schneeberger, Daniel V. O’Connor, Stephen B. Brandt
2005, Conference Paper, Proceedings of a workshop on the dynamics of lake whitefish (<i>Coregonus clupeaformis</i>) and the amphipod Diporeia spp. in the Great Lakes
We conducted a preliminary evaluation of a lake whitefish (Coregonus clupeaformis) bioenergetics model by applying the model to size-at-age data for lake whitefish from northern Lake Michigan. We then compared estimates of gross growth efficiency (GGE) from our bioenergetis model with previously published estimates of GGE for bloater (C. hoyi)...
The most recent large earthquake on the Rodgers Creek fault, San Francisco bay area
S. Hecker, D. Pantosti, David P. Schwartz, J. C. Hamilton, L.M. Reidy, T. J. Powers
2005, Bulletin of the Seismological Society of America (95) 844-860
The Rodgers Creek fault (RCF) is a principal component of the San Andreas fault system north of San Francisco. No evidence appears in the historical record of a large earthquake on the RCF, implying that the most recent earthquake (MRE) occurred before 1824, when a Franciscan mission was built near...
Specific conductance and water temperature data for San Francisco Bay, California, for Water Year 2004
P.A. Buchanan
2005, Interagency Ecological Program Newsletter (18) 2-6
This article presents time-series graphs of specificconductance and water-temperature data collected in San Francisco Bay during water year 2004 (October 1, 2003, through September 30, 2004). Specific-conductance and water-temperature data were recorded at 15-minute intervals at seven U.S. Geological Survey (USGS) locations (Figure 1, Table 1). Specific-conductance and water-temperature data...
Population status of Kittlitz's Murrelet Brachyramphus brevirostris along the southern coast of the Alaska Peninsula
Thomas I. van Pelt, John F. Piatt
2005, Report
The Kittlitz's murrelet (Brachyramphus brevirostris) is a rare seabird that nests in alpine terrain and generally forages near tidewater glaciers during the breeding season. An estimated 95% of the global population breeds in Alaska, with some unknown proportion breeding in the Russian Far East. A global population estimate using bestavailable...
Individual variation in staging and timing of spring migration of Pacific common eiders in Alaska
Margaret R. Petersen
2005, Conference Paper, Second North America Sea Duck Conference
Timing of migration and characterization of migration patterns of birds are usually based on dates of peak migration to and from staging, wintering, and breeding areas used by the bulk of a species. For Pacific common eiders (Somateria mollissima v-nigrum), as well as other species, the timing of migration into...
Contaminants as viral cofactors: assessing indirect population effects
Katherine R. Springman, Gael Kurath, James J. Anderson, John M. Emlen
2005, Aquatic Toxicology (71) 13-23
Current toxicological methods often miss contaminant effects, particularly when immune suppression is involved. The failure to recognize and evaluate indirect and sublethal effects severely limits the applicability of those methods at the population level. In this study, the Vitality model is used to evaluate the population level effects of a...
Association of ice and river channel morphology determined using ground-penetrationg radar in the Kuparuk River, Alaska
Heather Best, J. P. McNamara, Lee M. Liberty
2005, Arctic, Antarctic, and Alpine Research (37) 162
We collected ground-penetrating radar data at 10 sites along the Kuparuk River and its main tributary, the Toolik River, to detect unfrozen water beneath river ice. We used 250 MHz and 500 MHz antennas to image both the ice-water interface and the river channel in late April 2001, when daily...
Measuring nighttime spawning behavior of chum salmon using a dual-frequency identification sonar (DIDSON)
K.F. Tiffan, D.W. Rondorf
2005, Conference Paper
The striking body coloration and morphology that Pacific salmon display during spawning coupled with elaborate courtship behaviors suggest that visual cues are important during their reproductive period. To date, virtually all existing information on chum salmon (Oncorhynchus keta) spawning behavior has been derived from studies conducted during the daytime, and...
A method adapting microarray technology for signature tagged mutagenesis of Dusulfovibrio dusulfuricans G20 and Shewanella oneidensis MR-1 in anaerobic sediment survival experiments
Jennifer L. Groh, Qingwei Luo, Jimmy D. Ballard, Lee R. Krumholz
2005, Applied and Environmental Microbiology (71) 7064-7074
Signature-tagged mutagenesis (STM) is a powerful technique that can be used to identify genes expressed by bacteria during exposure to conditions in their natural environments. To date, there have been no reports of studies in which this approach was used to study organisms of environmental, rather than pathogenic, significance. We...
Sharpening advanced land imager multispectral data using a sensor model
G.P. Lemeshewsky
Rahman Z.Schowengerdt R.A.Reichenbach S.E., editor(s)
2005, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The Advanced Land Imager (ALI) instrument on NASA's Earth Observing One (EO-1) satellite provides for nine spectral bands at 30m ground sample distance (GSD) and a 10m GSD panchromatic band. This report describes an image sharpening technique where the higher spatial resolution information of the panchromatic band is used to...
Spatial data acquisition and integration
J. Jensen, A. Saalfeld, F. Broome, D. Cowen, K. Price, D. Ramsey, L. Lapine, E. Lynn Usery
2005, Book chapter, A research agenda for geographic information science
No abstract available....
Ecoregions and ecoregionalization: geographical and ecological perspectives
Thomas R. Loveland, James W. Merchant
2005, Environmental Management (34) S1-S13
Ecoregions, i.e., areas exhibiting relative homogeneity of ecosystems, are units of analysis that are increasingly important in environmental assessment and management. Ecoregions provide a holistic framework for flexible, comparative analysis of complex environmental problems. Ecoregions mapping has intellectual foundations in both geography and ecology. However, a hallmark of ecoregions mapping...
Evaluating water management strategies with the Systems Impact Assessment Model: SIAM version 4
John M. Bartholow, John Heasley, Blair Hanna, Jeff Sandelin, Marshall Flug, Sharon Campbell, Jim Henriksen, Aaron Douglas
2005, Open-File Report 2003-82
Water from many of California's coastal rivers has been used for a wide variety of development ventures, including major agricultural diversions, hydropower generation, and contaminant assimilation from industry, agriculture and logging. Anthropogenic impacts often degrade water quality and decrease the quantity and quality of aquatic habitat. Reallocating streamflow away from...
