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VEMAP 1: U.S. SOILEntry ID: VEMAP_1_SOIL
Abstract: The Vegetation/Ecosystem Modeling and Analysis Project (VEMAP) is an ongoing multiinstitutional, international effort addressing the response of biogeography and biogeochemistry to environmental variability in climate and other drivers in both space and time domains. The objectives of VEMAP are the intercomparison of biogeochemistry models and vegetationtype distribution models (biogeography ... models) and determination of their sensitivity to changing climate, elevated atmospheric carbon dioxide concentrations, and other sources of altered forcing. Soil properties were based on a 10-km gridded EPA soil database developed by Kern (1994, 1995). Two soil coverages are provided in the Kern data set: one from the USDA Soil Conservation Service (SCS) national soil database (NATSGO) and the other from the United Nations Food and Agriculture Organization soil database (FAO 1974- 78). Only the SCS NATSGO soils are included in the VEMAP set. Physical consistency in soils data was incorporated by representing a grid cell's soil by a set of dominant (modal) soil profiles, rather than by a simple average of soil properties. Because soil processes, such as soil organic matter turnover and water balance, are non-linearly related to soil texture and other soil parameters, simulations based on dominant soil profiles and their frequency distribution can account for soil dynamics that would be lost if averaged soil properties were used. To spatially aggregate Kern data to the 0.5 degree grid, we used cluster analysis to group the subgrid 10-km elements into up to 4 modal soil catagories (Kittel et al. 1995). In this statistical approach, cell soil properties are represented by the set of modal soils, rather than by an "average soil." We also provide cell- averaged soil data. Please see the associated Data Set Revision page for an explanation of recent changes made to this data set. A complete users guide to the VEMAP Phase I database which includes more information about this data set can be found at ftp://daac.ornl.gov/data/vemap-1/comp/Phase_1_User_Guide.pdf. ORNL DAAC maintains additional information associated with the VEMAP Project. Data Citation: This data set should be cited as follows: Kittel, T. G. F., N. A. Rosenbloom, T. H. Painter, D. S. Schimel, H. H. Fisher, A. Grimsdell, VEMAP Participants, C. Daly, and E. R. Hunt, Jr. 2002. VEMAP Phase I Database, revised. Available on-line from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.
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Data Set Citation
Dataset Originator/Creator: DALY, C.FISHER, H.H.GRIMSDELL, A.HUNT, E.R.KITTEL, T.G.F.PAINTER, T.H.ROSENBLOOM, N.A.SCHIMEL, D.S.VEMAP PARTICIPANTS
Dataset Title: VEMAP 1: U.S. SOIL
Dataset Release Date: 2002
Dataset Release Place: Oak Ridge, Tennessee, U.S.A.
Dataset Publisher: Oak Ridge National Laboratory Distributed Active Archive Center
Data Presentation Form: Online Files
Dataset DOI: doi:10.3334/ORNLDAAC/227Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=227&term2attribut...
Start Date: 1961-01-01Stop Date: 1990-12-31
Quality Data has undergone a full QC.
Access Constraints Accessible only by CLPX approved investigators until April 2004.
Data Set Progress
Distribution Media: FTP
Distribution Format: ASCII
Phone: 970 498 1233
Fax: 970 498 1212
Email: kelder at fs.fed.us
USFS RMRS Rocky Mountain Research Station USDA Forest Service 240 West Prospect Road
City: Fort Collins
Province or State: CO
Postal Code: 80526
Phone: 952 361 6610 x252
Fax: 952 361 6634
Email: cline at nohrsc.nws.gov
National Weather Service National Operational Hydrologic Remote Sensing Center 1735 Lake Drive W.
Province or State: MN
Postal Code: 55317
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
National Snow and Ice Data Center CIRES, 449 UCB University of Colorado
Province or State: CO
Postal Code: 80309-0449
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2003-08-12
Last DIF Revision Date: 2012-05-14