HR: 0800h
AN: GC21A-0130    [Abstracts]
TI: Comparison of Regional Climate Simulations Driven by a Global Reanalysis and a Global Climate Simulation Over North America
AU: * Leung, L
EM: ruby.leung@pnl.gov
AF: Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, United States
AU: Qian, Y
EM: yun.qian@pnl.gov
AF: Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, United States
AB: As part of the North American Regional Climate Change Assessment Program (NARCCAP), two regional climate simulations were performed for 1979 - 2005 for North America based on the Penn State/NCAR MM5 and Weather Research and Forecasting model (WRF) driven by the NCEP/DOE global reanalysis and AMIP sea surface temperature. Although MM5 and WRF share many common physics parameterizations, there are apparent differences in how well the models simulate precipitation and the surface energy and water budgets and their interannual variations. Analyses are being performed to eluciate the causes for model differences in both warm and cold season regimes. Additionally, WRF is being used to downscale global climate simulations for the present and future conditions. By comparing regional simulations (MM5 and WRF) driven by the same global reanalysis and regional simulations (WRF) driven by the global reanalysis and global climate simulation, we will examine the relative control of the large scale boundary conditions and physics parameterizations on the regional simulations.
DE: 1610 Atmosphere (0315, 0325)
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 1655 Water cycles (1836)
DE: 1854 Precipitation (3354)
SC: Global Environmental Change [GC]
MN: 2007 Fall Meeting