Skip to main content
USGS - science for a changing world
Advanced Search

Filters: Tags: pressure (X)

59 results (8ms)   

View Results as: JSON ATOM CSV
thumbnail
To capture cumulative threat in a given location, the four threats in the Reefs at Risk Caribbean analysis - coastal development, marine-based, sedimentation and overfishing - were integrated into a single index - the Reefs at Risk Threat Index.
thumbnail
To capture cumulative threat in a given location, the four threats in the Reefs at Risk Caribbean analysis - coastal development, marine-based, sedimentation and overfishing - were integrated into a single index - the Reefs at Risk Threat Index.
thumbnail
This dataset depicts relative erosion rate derived for all land draining above the Mesoamerican reef. It is a function of slope, land cover type, precipitation and soil type. The indicators developed by the Reefs at Risk in the Caribbean project enable detailed comparative analyses of threats on many scales. The Reefs at Risk indicators are a simplification of human activities and complex natural processes. This data set was derived at the World Resources Institute for input to the sedimentation and pollution from watershed based sources threat analysis. Agriculture, though important to economic development and food security, is a source of increased sediment, nutrient, and pesticide runoff. Threats from sedimentation...
thumbnail
Using basins derived from a hydrologically-corrected 30m resolution DEM as a unit for summary statistics, we provide a series of indicators focused on land-based sources of threat within the US Virgin Islands and Puerto Rico. This includes indicators of a) the relative vulnerability of the land to erosion (based on slope, precipitation and soil erodibility); b) the relative erosion potential (REP) of the land, based on the relative vulnerability of the land, coupled with the current land cover type; c) the sediment delivery rate for each basin (percentage of eroded which reaches the river mouth); d) estimated sediment delivery for the basin, given current land use;
thumbnail
Agriculture, though important to economic development and food security, is a source of increased sediment, nutrient, and pesticide runoff. Threats from sedimentation and pollution from inland sources were modeled for over 3,000 watersheds discharging into the Caribbean.
thumbnail
Agriculture, though important to economic development and food security, is a source of increased sediment, nutrient, and pesticide runoff. Threats from sedimentation and pollution from inland sources were modeled for about 150 watersheds discharging along the Mesoamerican reef, and associated sediment plumes estimated.
thumbnail
This dataset shows summary statistics for relative erosion rate (REP), river flow, and sediment delivery estimated for each of over 150 watersheds draining along the Mesoamerican Reef.
thumbnail
Using basins derived from a hydrologically-corrected 30m resolution DEM as a unit for summary statistics, we provide a series of indicators focused on land-based sources fo threat within the US Virgin Islands. This includes indicators of a) the relative vulnerability of the land to erosion (based on slope, precipitation and soil erodibility); b) the relative erosion potential (REP) of the land, based on the relative vulnerability of the land, coupled with the current land cover type; c) the sediment delivery rate for each basin (percentage of eroded which reaches the river mouth); d) estimated sediment delivery for the basin, given current land use; e) the road density within the basin, and f) indicators of how...
thumbnail
The North American Regional Climate Change Assessment Program (NARCCAP) is an international program to produce high resolution climate change simulations in order to investigate uncertainties in regional scale projections of future climate and generate climate change scenarios for use in impacts research. NARCCAP modelers are running a set of regional climate models (RCMs) driven by a set of atmosphere-ocean general circulation models (AOGCMs) over a domain covering the conterminous United States and most of Canada. The AOGCMs have been forced with the SRES A2 emissions scenario for the 21st century. Simulations with these models were also produced for the current (historical) period. The RCMs are nested within...
thumbnail
To capture cumulative threat in a given location, the four threats in the Reefs at Risk Caribbean analysis - coastal development, marine-based, sedimentation and overfishing - were integrated into a single index - the Reefs at Risk Threat Index. A 100 m resolution GRID reflecting coral reef locations was classifed by this threat index, which was then converted to points for display.
thumbnail
This dataset depicts combined threats to coral reefs in the Mesoamerican region based on coastal development, marine-based, sedimentation and overfishing as polygons.


map background search result map search result map North American Regional Climate Change Assessment Program (NARCCAP) Average Annual Vapor Pressure (kelvins) for a 0.5° Grid Resolution over North America for the CGCM2 SRES A2 scenario (2070-2099). Mesoamerica Sedimentation Threats to Coral Reefs Watershed Indicators by Basin for St. Croix, United States Virgin Islands Caribbean threats from watershed-based sources of sedimentation and pollution (polygon) Caribbean Reefs at Risk Threat Index (polygon) Mesoamerica Watershed Statistics Mesoamerican Relative Erosion Rate Mesoamerica Integrated Threats to Coral Reefs (points) Mesoamerican Combined Threats to Reefs (polygons) Puerto Rico Watershed Indicators by Basin Caribbean Reefs at Risk Index (points) Watershed Indicators by Basin for St. Croix, United States Virgin Islands Puerto Rico Watershed Indicators by Basin Mesoamerica Integrated Threats to Coral Reefs (points) Mesoamerica Sedimentation Threats to Coral Reefs Mesoamerica Watershed Statistics Mesoamerican Combined Threats to Reefs (polygons) Mesoamerican Relative Erosion Rate Caribbean Reefs at Risk Index (points) Caribbean threats from watershed-based sources of sedimentation and pollution (polygon) Caribbean Reefs at Risk Threat Index (polygon) North American Regional Climate Change Assessment Program (NARCCAP) Average Annual Vapor Pressure (kelvins) for a 0.5° Grid Resolution over North America for the CGCM2 SRES A2 scenario (2070-2099).