Achieving sub-pixel geolocation accuracy in support of MODIS land science
R.E. Wolfe, M. Nishihama, A.J. Fleig, J.A. Kuyper, David P. Roy, James C. Storey, F.S. Patt
2002, Remote Sensing of Environment (83) 31-49
The Moderate Resolution Imaging Spectroradiometer (MODIS) was launched in December 1999 on the polar orbiting Terra spacecraft and since February 2000 has been acquiring daily global data in 36 spectral bands—29 with 1 km, five with 500 m, and two with 250 m nadir pixel dimensions. The Terra satellite has...
What records have we been breaking?
J.M. Bartholow, R. Milhous
2002, Colorado Climate (3) 1-4
"Today was another record-breaking day," the evening radio or television declares. High temperatures, low temperatures, floods, drought - take your choice. But how can we put these pronouncements in perspective? What do they really mean?We present two types of information in this article: 1) an analysis of daily air temperature...
Diet dynamics of the adult piscivorous fish community in Spirit Lake, Iowa, USA 1995-1997
H. Liao, C.L. Pierce, J. G. Larscheid
2002, Ecology of Freshwater Fish (11) 178-189
Diets of adults of six important piscivorous fish species, black crappie Pomoxis nigromaculatus, largemouth bass Micropterus salmoides, northern pike Esox lucius, smallmouth bass Micropterus dolomieui, walleye Stizostedion vitreum, and yellow perch Perca flavescens were quantified in Spirit Lake, Iowa, USA from May to October in 1995-1997. Forty-one prey taxa were...
Evaluation of Light Detection and Ranging (LIDAR) for measuring river corridor topography
Z.H. Bowen, R.G. Waltermire
2002, Journal of the American Water Resources Association (38) 33-41
LIDAR is relatively new in the commercial market for remote sensing of topography and it is difficult to find objective reporting on the accuracy of LIDAR measurements in an applied context. Accuracy specifications for LIDAR data in published evaluations range from 1 to 2 m root mean square error (RMSEx,y)...
Methane hydrate in the global organic carbon cycle
K.A. Kvenvolden
2002, Terra Nova (14) 302-306
The global occurrence of methane hydrate in outer continental margins and in polar regions, and the magnitude of the amount of methane sequestered in methane hydrate suggest that methane hydrate is an important component in the global organic carbon cycle. Various versions of this cycle have emphasized the importance of...
The role of bedrock topography on subsurface storm flow
Jim Freer, Jeffery J. McDonnell, K.J. Beven, N.E. Peters, Douglas A. Burns, R. P. Hooper, B. Aulenbach, C. Kendall
2002, Water Resources Research (38) 5-1-5-16
We conducted a detailed study of subsurface flow and water table response coupled with digital terrain analysis (DTA) of surface and subsurface features at the hillslope scale in Panola Mountain Research Watershed (PMRW), Georgia. Subsurface storm flow contributions of macropore and matrix flow in different sections along an artificial trench...
Aphanomyces invadans in Atlantic Menhaden along the East Coast of the United States
Vicki S. Blazer, J. H. Lilley, W. B. Schill, Y. Kiryu, Christine L. Densmore, V. Panyawachira, S. Chinabut
2002, Journal of Aquatic Animal Health (14) 1-10
The cause of deeply penetrating ulcers of Atlantic menhaden Brevoortia tyrannus has been the subject of significant research efforts in recent years. These lesions and the associated syndrome termed ulcerative mycosis have been observed along the East Coast of the United States since at least the early 1980s. Although Aphanomyces spp. were isolated from...
The 1999 eruption of Shishaldin Volcano, Alaska: Monitoring a distant eruption
C.J. Nye, T. E. C. Keith, J.C. Eichelberger, T. P. Miller, S.R. McNutt, S. Moran, D.J. Schneider, J. Dehn, J.R. Schaefer
2002, Bulletin of Volcanology (64) 507-519
Shishaldin Volcano, in the central Aleutian volcanic arc, became seismically restless during the summer of 1998. Increasing unrest was monitored using a newly installed seismic network, weather satellites, and rare local visual observations. The unrest culminated in large eruptions on 19 April and 22-23 April 1999. The opening phase of...
Palila (Loxioides bailleui)
Paul C. Banko, Luanne Johnson, Gerald D. Lindsey, Steven G. Fancy, Thane K. Pratt, James Jacobi, Winston E. Banko
2002, Birds of North America No. 679
One of the last surviving of the extraordinary “finch-billed” Hawaiian honeycreepers (Drepanidinae), the Palila epitomizes specialization for seed-eating as it relies almost entirely on immature (soft) seeds, flowers, and other resources produced or supported by mämane (Sophora chrysophylla: Fabaceae), an endemic dry-forest tree. Mämane seeds are highly nutritious, but...
Use of electronarcosis to immobilize juvenile lake and shortnose sturgeons for handling and the effects on their behavior
E. Henyey, B. Kynard, P. Zhuang
2002, Journal of Applied Ichthyology (18) 502-504
Low voltage constant direct current was used to immobilize juvenile lake (Acipenser fulvescens) and shortnose sturgeons (A. brevirostrum). There was no significant difference in time/ the lake or shortnose sturgeons required to exhibit positive rheotaxis between fish immobilized with electricity and control fish (two-way ANOVA, P = 0.11). Fish immobilized...
A preliminary evaluation of near-transducer velocities collected with low-blank acoustic Doppler current profiler
J. W. Gartner, N. K. Ganju
T. L. Wahl, C. A. Pugh, Kevin Oberg, T. B. Vermeyen, editor(s)
2002, Conference Paper
Many streams and rivers for which the US Geological Survey must provide discharge measurements are too shallow to apply existing acoustic Doppler current profiler techniques for flow measurements of satisfactory quality. Because the same transducer is used for both transmitting and receiving acoustic signals in most Doppler current profilers, some...
Use of an Acoustic Doppler Current Profiler (ADCP) to Measure Hypersaline Bidirectional Discharge
K. K. Johnson, B.L. Loving
Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B.Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B., editor(s)
2002, Conference Paper, Hydraulic Measurements and Experimental Methods
The U.S. Geological Survey measures the exchange of flow between the north and south parts of Great Salt Lake, Utah, as part of a monitoring program. Turbidity and bidirectional flow through the breach in the causeway that divides the lake into two parts makes it difficult to measure discharge with...
Conventional U-Pb dating versus SHRIMP of the Santa Barbara Granite Massif, Rondonia, Brazil
I. Sparrenberger, Jorge S. Bettencourt, R. M. Tosdal, J. L. Wooden
2002, Geologia USP - Serie Cientifica (2) 79-94
The Santa Ba??rbara Granite Massif is part of the Younger Granites of Rondo??nia (998 - 974 Ma) and is included in the Rondo??nia Tin Province (SW Amazonian Craton). It comprises three highly fractionated metaluminous to peraluminous within-plate A-type granite units emplaced in older medium-grade metamorphic rocks. Sn-mineralization is closely associated...
X-ray Computed Tomography Observation of Methane Hydrate Dissociation
L. Tomutsa, B. Freifeld, T.J. Kneafsey, L.A. Stern
2002, Conference Paper, SPE Proceedings - Gas Technology Symposium
Deposits of naturally occurring methane hydrate have been identified in permafrost and deep oceanic environments with global reserves estimated to be twice the total amount of energy stored in fossil fuels. The fundamental behavior of methane hydrate in natural formations, while poorly understood, is of critical importance if the economic...
Supporting user-defined granularities in a spatiotemporal conceptual model
V. Khatri, S. Ram, R.T. Snodgrass, G. M. O’Brien
2002, Conference Paper, Annals of Mathematics and Artificial Intelligence
Granularities are integral to spatial and temporal data. A large number of applications require storage of facts along with their temporal and spatial context, which needs to be expressed in terms of appropriate granularities. For many real-world applications, a single granularity in the database is insufficient. In order to support...
Rocky Mountain futures: An ecological perspective
Jill Baron, editor(s)
2002, Book
The Rocky Mountain West is largely arid and steep, with ecological scars from past human use visible for hundreds of years. Just how damaging were the past 150 years of activity? How do current rates of disturbance compare with past mining, grazing, and water diversion activities? In the face of...
Diversion of meltwater from Kautz Glacier initiates small debris flows near Van Trump Park, Mount Rainier, Washington
James W. Vallance, Carolyn L. Driedger, William E. Scott
2002, Washington Geology (30) 17-19
No abstract available....
Survival of Columbian white-tailed deer in western Oregon
Mark A. Ricca, Robert G. Anthony, Dewaine H. Jackson, Scott A. Wolfe
2002, Journal of Wildlife Management (66) 1255-1266
Columbian white-tailed deer (Odocoileus virginianus leucurus; CWTD) are an endangered subspecies on which little demographic information exists. We determined survival rates and causes of mortality for 64 radiocol- lared adults from 1996 to 1998, and for 63 radiocollared neonatal fawns during the summer and fall months of 1996-2001 in Douglas...
Plotting equation for Gaussian percentiles and a spreadsheet program for generating probability plots
J. H. Balsillie, Joseph F. Donoghue, K. M. Butler, J. L. Koch
2002, Journal of Sedimentary Research (72) 929-933
Two-dimensional plotting tools can be of invaluable assistance in analytical scientific pursuits, and have been widely used in the analysis and interpretation of sedimentologic data. We consider, in this work, the use of arithmetic probability paper (APP). Most statistical computer applications do not allow for the generation of APP plots,...
Daily energy expenditures of free-ranging Common Loon (Gavia immer) chicks
F. Fournier, W. H. Karasov, M.W. Meyer, K.P. Kenow
2002, The Auk (119) 1121-1126
We measured the daily energy expenditure of free-living Common Loon (Gavia immer) chicks using doubly labeled water (DLW). Average body mass of chicks during the DLW measures were 425, 1,052, and 1,963 g for 10 day-old (n = 5), 21 day-old (n = 6), and 35 day-old (n = 6)...
Undrained poroelastic response of sandstones to deviatoric stress change
D.A. Lockner, S. A. Stanchits
2002, Journal of Geophysical Research B: Solid Earth (107) ETG 13-1-ETG 13-14
Deformation of porous crustal rock through diagenesis, tectonic loading, or other processes can change pore volume and affect fluid pressure. The largest stress-induced pore pressure changes occur when fluid is trapped in pores in an “undrained” condition. We have measured the undrained poroelastic response of two sandstones to changes in...
Mercury in feathers from Chilean birds: Influence of location, feeding strategy and taxonomic affiliation
H. G. Ochoa-Acuna, M. S. Sepulveda, T. S. Gross
2002, Marine Pollution Bulletin (44) 340-349
This study reports baseline concentrations of mercury (Hg) in feathers from different species of birds sampled at various locations off the Chilean coast (Southeastern Pacific). Hg concentrations were evaluated in relation to geographic location, taxonomic affiliation, and feeding strategies. Between January and March of 1995, we collected mature contour feathers...
Use of satellite telemetry to identify common loon migration routes, staging areas and wintering range
Kevin P. Kenow, Michael W. Meyer, David Evers, David C. Douglas, J. Hines
2002, Waterbirds (25) 449-458
We developed a satellite transmitter attachment technique for adult Common Loons (Gavia immer) that would help in identifying important migration routes, staging areas, and the location of wintering grounds of birds that breed in the north central United States. During the autumn and winter of 1998, the migration of...
Epizootiologic studies of avian vacuolar myelinopathy in waterbirds
Tonie E. Rocke, N. J. Thomas, T. Augspurger, Kimberli J.G. Miller
2002, Journal of Wildlife Diseases (38) 678-684
Epizootic avian vacuolar myelinopathy (AVM) was first recognized as a neurologic disease in bald eagles (Haliaeetus leucocephalus) and American coots (Fulica americana) in Arkansas, USA in 1994 and 1996, respectively, but attempts to identify the etiology of the disease have been unsuccessful to date. Between 1998 and 2001, wing clipped...
Application of diagnostic tests for mycoplasmal infections of desert and gopher tortoises with management recommendations
D.R. Brown, Isabella M. Schumacher, Grace S. Mclaughlin, L.D. Wendland, Mary E. Brown, P.A. Klein, E.R. Jacobson
2002, Chelonian Conservation and Biology (4) 497-507
Mycoplasmosis is a transmissible upper respiratory tract disease that has affected plans for management and conservation of wild desert and gopher tortoises in the United States. Although impact of mycoplasmosis on populations of desert and gopher tortoises is unknown, increased prevalence of seropositive animals as well as field observations of...
