BLM REA COP 2010 Runoff (2045-2060) Simulated by MAPSS using RegCM3 Climate with GENMOM Projections as Boundary Conditions (Western US)

Metadata Updated: June 8, 2018

Runoff simulated by the biogeography model MAPSS using RegCM3 climate with GENMOM projections as boundary conditions. Units are millimeters of water. MAPSS (Mapped Atmosphere-Plant-Soil System) is a static biogeography model that projects potential vegetation distribution and hydrological flows on a grid (http://www.databasin.org/climate-center/features/mapss-model). MAPSS has been used widely for various climate change assessments including the 2000 National Assessment Synthesis Team's report. MAPSS uses long term, average monthly climate data (mean monthly temperature, vapor pressure, wind speed, and precipitation) as well as soils information (texture, depth). Based on a set of climatic thresholds, the model defines the following plant functional types: evergreen needleleaf or broadleaf trees/shrubs, deciduous broadleaf or needleleaf trees/shrubs, C3 and C4 grasses. The model uses thresholds of LAI and climatic zone thresholds to identify potential vegetation types. The model simulates surface runoff, infiltration, saturated, and unsaturated percolation through the soil profile. Transpiration is constrained by available soil water, leaf area, and stomatal conductance. The model calculates the leaf area index (LAIs) for both woody (either trees or shrubs) and grass lifeforms competing for light and water, while maintaining a site water balance consistent with observed runoff (Neilson 1995). Water in the surface soil layer is apportioned to the trees and grasses in relation to their relative LAIs and stomatal conductance, i.e., canopy conductance, but trees have access to deeper soil water while grasses do not. Stomatal conductance varies as a function of potential evapotranspiration (PET, a surrogate for vapor pressure deficit) and soil water content. An elevated CO2 has been documented to affect vegetation responses to climate change through changes in carbon fixation and water-use-efficiency (WUE, carbon atoms fixed per water molecule transpired). The MAPSS model has been run under the A2 emission scenario imposing an increase in water use efficiency such that at 700pm CO2, transpiration is reduced by 25%. The model code is publically available from the Oak Ridge model repository (http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=853) with documentation.

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License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Date September 15, 2016
Metadata Created Date February 23, 2018
Metadata Updated Date June 8, 2018
Reference Date(s) January 1, 2011 (publication)
Frequency Of Update notPlanned
Frequency Of Update notPlanned

Metadata Source

Harvested from DOI CKAN Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date September 15, 2016
Metadata Created Date February 23, 2018
Metadata Updated Date June 8, 2018
Reference Date(s) January 1, 2011 (publication)
Responsible Party Conservation Biology Institute (Point of Contact)
Contact Email
Access Constraints Use Constraints: These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived, and both scale and accuracy may vary across the data set. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office for which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes made were approved or endorsed by BLM. This information may be updated without notification., Access Constraints: None, these data are considered public domain
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Bbox North Lat 41.216248
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Frequency Of Update notPlanned
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Harvest Source Title DOI CKAN Harvest Source
Licence The BLM assumes no responsibility for errors or omissions. No warranty is made by the BLM as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data; nor shall the act of distribution to contractors, partners, or beyond, constitute any such warranty for individual or aggregate data use with other data. Although these data have been processed successfully on computers of BLM, no warranty, expressed or implied, is made by BLM regarding the use of these data on any other system, or for general or scientific purposes, nor does the fact of distribution constitute or imply any such warranty. In no event shall the BLM have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of the use or reliance on the geographic data or arising out of the delivery, installation, operation, or support by BLM.
Metadata Language
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Spatial Data Service Type
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