Publications
Filter Total Items: 479
Variations in Community Exposure and Sensitivity to Tsunami Hazards in the State of Hawai'i
Hawai`i has experienced numerous destructive tsunamis and the potential for future events threatens the safety and economic well being of its coastal communities. Although tsunami-evacuation zones have been delineated, what is in these areas and how communities have chosen to develop within them has not been documented. A community-level vulnerability assessment using geographic-information-system
Authors
Nathan Wood, Alyssia Church, Tim Frazier, Brent Yarnal
Geographic Research in the USGS Western Region
The two geography research programs of the U.S. Geological Survey (USGS), Land Remote Sensing and Geographic Analysis and Monitoring, have very strong relevance to the USGS mission and science strategy. In the western United States, the particular niche of these geography programs is in connecting USGS science to people and communities.
Reports from the National Academy of Sciences and other or
Authors
Mara Tongue
Land-Cover Trends of the Sierra Nevada Ecoregion, 1973-2000
The U.S. Geological Survey has developed and is implementing the Land Cover Trends project to estimate and describe the temporal and spatial distribution and variability of contemporary land-use and land-cover change in the United States. As part of the Land Cover Trends project, the purpose of this study was to assess land-use/land-cover change in the Sierra Nevada ecoregion for the period 1973 t
Authors
Christian G. Raumann, Christopher E. Soulard
Interannual covariability between actual evapotranspiration and PAL and GIMMS NDVIs of northern Asia
This study examined the covariability between interannual changes in the normalized difference vegetation index (NDVI) and actual evapotranspiration (ET). To reduce possible uncertainty in the NDVI time series, two NDVI datasets derived from Pathfinder AVHRR Land (PAL) data and the Global Inventory Monitoring and Modeling Studies (GIMMS) group were used. Analyses were conducted using data over nor
Authors
Rikie Suzuki, Kooiti Masuda, Dennis G. Dye
Improving the Homeland Security Advisory System: An experimental analysis of threat communication for homeland security
No abstract available.
Authors
Philip T. Ganderton, R. L. Bernknopf
Multicriteria decision analysis: Overview and implications for environmental decision making
Environmental decision making involving multiple stakeholders can benefit from the use of a formal process to structure stakeholder interactions, leading to more successful outcomes than traditional discursive decision processes. There are many tools available to handle complex decision making. Here we illustrate the use of a multicriteria decision analysis (MCDA) outranking tool (PROMETHEE) to fa
Authors
Caroline M. Hermans, Jon D. Erickson
United States‐Mexican border watershed assessment: Modeling nonpoint source pollution in Ambos Nogales
Ecological considerations need to be interwoven with economic policy and planning along the United States‐Mexican border. Non‐point source pollution can have significant implications for the availability of potable water and the continued health of borderland ecosystems in arid lands. However, environmental assessments in this region present a host of unique issues and problems. A common obstacle
Authors
Laura M. Norman
Cost-Benefit Analysis of Computer Resources for Machine Learning
Machine learning describes pattern-recognition algorithms - in this case, probabilistic neural networks (PNNs). These can be computationally intensive, in part because of the nonlinear optimizer, a numerical process that calibrates the PNN by minimizing a sum of squared errors. This report suggests efficiencies that are expressed as cost and benefit. The cost is computer time needed to calibrate t
Authors
Richard A. Champion
A simulation model of land-use change in the Lake Tahoe Basin of California and Nevada, as used in a decision-support system
The Tahoe Land-Use Change model is a stochastic, spatially explicit simulation of future land-use change—in particular, development and retirement of individual parcels—in the Lake Tahoe Basin of California and Nevada. The Federal, State, and regional management agencies responsible for the basin are revising and integrating their 20-year plans to meet various goals, including maintaining or impro
Authors
Mark L. Hessenflow, David L. Halsing
Reconciling carbon-cycle concepts, terminology, and methods
Recent projections of climatic change have focused a great deal of scientific and public attention on patterns of carbon (C) cycling as well as its controls, particularly the factors that determine whether an ecosystem is a net source or sink of atmospheric carbon dioxide (CO2). Net ecosystem production (NEP), a central concept in C-cycling research, has been used by scientists to represent two di
Authors
F. S. Chapin, G. M. Woodwell, J. T. Randerson, E. B. Rastetter, G. Lovett, D. D. Baldocchi, D. A. Clark, M. E. Harmon, D. S. Schimel, R. Valentini, C. Wirth, J. D. Aber, J. J. Cole, M. L. Goulden, Jennifer W. Harden, M. Heimann, R. W. Howarth, P. A. Matson, A. D. McGuire, J. M. Melillo, H. A. Mooney, J. C. Neff, R. A. Houghton, M. L. Pace, M. G. Ryan, S. W. Running, O. E. Sala, W. H. Schlesinger, E. -D. Schulze
Integrating Stakeholders and Users into the Geography Discipline's Research Process
Future research priorities of Geography emphasize the discipline's leadership role in the U.S. Geological Survey (USGS) in multidisciplinary and integrated research on human and environmental systems and how these systems are interrelated and respond to change
Geography's research priorities also emphasize providing science that is usable to society and creating decision support products appli
Authors
Caroline M. Hermans, Richard Taketa
Geodetic observations of post-seismic transients in the context of the earthquake deformation cycle
Satellite geodetic techniques that can measure displacements with millimeter-level accuracy reveal transient signals in the deformation fields produced by both moderate and large earthquakes. These post-seismic signals exhibit characteristic time scales ranging from weeks to decades and distance scales from hundreds of meters to hundreds of kilometers. By considering them in the context of the ear
Authors
Kurt L. Feigl, Wayne R. Thatcher