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Relationship of Downscaling to CSES Integration. Downscaling Methods used in CSES. Statistical Empirically relate large-scale patterns to mesoscale patterns Fast but lack details Applied to several IPCC models and scenarios Widmann Bretherton Salathé (2003) Wood et al. Physical
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Downscaling Methods used in CSES • Statistical • Empirically relate large-scale patterns to mesoscale patterns • Fast but lack details • Applied to several IPCC models and scenarios • Widmann Bretherton Salathé (2003) • Wood et al. • Physical • Nested mesoscale model • Computationally intensive but provide all details • PNW Regional model based on MM5 • Applied to NCAR-DOE PCM Simulation
Downscaling Methods Regional Climate Model • Based on MM5 real-time system • 135-45-15 Nested Grids • Nudging on outermost grid • Plan to use NOAH-LSM with modifications to deep soil
Applications • Hydrology-Fish-Forests-Coasts • Statistical downscaling method applied to Streamflow simulations • Regional Model will be applied to streamflow allowing direct comparison among several methods • Links to forests, fish, and coasts • Air quality • Two collaborative EPA/STAR projects • Seasonal hydrologic forecasting