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VEMAP 1: Selected Model Results
The Vegetation/Ecosystem Modeling and Analysis Project (VEMAP) was a multi-institutional, 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 vegetation type distribution models (biogeography models) and determination of their sensitivity to changing climate, elevated atmospheric carbon dioxide concentrations, and other sources of altered forcing.Selected variable output results from the VEMAP Phase I modeling exercise are now available for several combinations of biogeochemistry and biogeography models and climate change scenarios through the ORNL DAAC. For a description of the models and climate scenarios employed in the VEMAP 1 project and a discussion of the results please refer to the following publication: VEMAP Members. 1995. Vegetation/Ecosystem Modeling and Analysis Project: Comparing biogeography and biogeochemistry models in a continental-scale study of terrestrial ecosystem responses to climate change and CO2 doubling. Global Biogeochem. Cycles 9:407-437.
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VEMAP 1: Model Input Database CD-ROM ISO Image
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The VEMAP 1: Model Input Database CD-ROM ISO image contains long-term data that were used as input in comparing models during Phase 1 of the Vegetation Ecosystem Modeling and Analysis Project. Compiled and model-generated data sets of long-term mean climate, soils, vegetation, and climate change scenarios for the conterminous United States. Dates of the data sets range between 1895 and 1996. The data are gridded at 0.5 degree latitude by 0.5 degree longitude.
VEMAP 2: Monthly Ecosystem Model Responses to U.S. Climate Change, 1994-2100
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Phase 2 developed historical (1895-1993) gridded data sets of climate (temperature, precipitation, solar radiation, humidity, and wind speed) and projected (1994-2100) gridded annual and monthly climate data sets using output from two climate system models [CCCma (Canadian Centre for Climate Modeling and Analysis) and Hadley Centre models]. Two Phase 2 model experiments were run. First, a set of selected biogeochemical models and coupled biogeochemical-biogeographical models were run from 1895 to 1993 to compare model responses to the historical time series and current ecosystem biogeochemistry. Second, these same models were run on the projected 1994 to 2100 data to compare their ecological responses to transient scenarios of climate and atmospheric CO2 change. Model runs were performed for daily, monthly, and annual gridded data sets. The output of the monthly model runs in VEMAP grid format are contained in this data set.
VEMAP 1: U.S. Potential Natural Vegetation
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An integrated input data set for ecosystem and vegetation modeling for the conterminous United States: Vegetation
VEMAP 1: U.S. Site Files
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An integrated input data set for ecosystem and vegetation modeling for the conterminous United States: Site Files
VEMAP 2: U.S. Daily Climate, 1895-1993
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VEMAP Phase 2 has developed a data set of ~100-year gridded monthly and daily time series of climate for the conterminous United States that includes realistic interannual variability. This data set has been used to compare time-dependent ecological responses of biogeochemical and coupled biogeochemical-biogeographical models to historical time series and projected scenarios of climate, atmospheric CO2, and N-Deposition, and N-Deposition
VEMAP 1: U.S. Climate, 1961-1990
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An integrated input data set for ecosystem and vegetation modeling for the conterminous United States: Climate
VEMAP 2: U.S. Annual Climate, 1895-1993
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An integrated input data set for ecosystem and vegetation modeling for the conterminous United States. The data set is a ~100 year fully gridded annual time series of climate that includes realistic interannual variability.
HMS-Gridded-Automation
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Batch collection of environmental data modeling workflow for gridded land surface models (LSMs) through DEM acquisition and HMS Restful API tailored for VELMA initialization. This dataset is associated with the following publication: Venable, K., J. Johnston, and S. Leduc. Streamlining land surface model Initialization: Automated data retrieval for VELMA using HMS REST API and GDAL. ENVIRONMENTAL MODELLING & SOFTWARE. Elsevier Science, New York, NY, 191: 106492, (2025).
VEMAP 1: U.S. Climate Change Scenarios Based on Models with Increased CO2
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An integrated input data set for ecosystem and vegetation modeling for the conterminous United States: Climate Scenarios
VEMAP 2: U.S. Monthly Climate Change Scenarios, Version 2
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Data sets of transient climate change scenarios based on coupled atmosphere-ocean general circulation model (AOGCM) transient climate experiments with transient greenhouse gas and sulfate aerosol forcing.
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