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In 2007, Reclamation teamed with Santa Clara University and Lawrence Livermore National Laboratory to develop and serve a publically available archive containing projections of monthly temperature and precipitation for the contiguous United States. Using a technique called Bias Correction Spatial Disaggregation (BCSD), these projections are developed by processing global climate model (GCM) outputs in two ways: first to correct GCM biases, and second to translate conditions from GCM to finer spatial resolution. The archive has served requests from roughly 800 users, supporting various planning and research activities. Reclamation has used the archive contents in numerous studies to characterize future supplies...
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To understand potential climate change impacts on ecosystems, water resources, and numerous other natural and managed resources, climate change data and projections must be downscaled from coarse global climate models to much finer resolutions and more applicable formats. This project conducted comparative analyses to better understand the accuracy and properties of these downscaled climate simulations and climate-change projections. Interpretation, guidance and evaluation, including measures of uncertainties, strengths and weaknesses of the different methodologies for each simulation, can enable potential users with the necessary information to select and apply the models.


    map background search result map search result map Analysis of Downscaled Climate Simulations and Projections and Their Use in Decision Making for the Southwest Analysis of Downscaled Climate Simulations and Projections and Their Use in Decision Making for the Southwest