BRIDGING THE CLIMATE GAP: FROM GLOBAL PROJECTIONS TO REGIONAL IMPACTS Katharine Hayhoe and Don Wuebbles University of Illinois at Urbana-Champaign Texas Tech University HEALTH: CONTINENTAL U.S. AGRICULTURE: MIDWEST Summer average daily maximum 8-hour changes in surface ozone 2050s A1fi higher B1 lower Heat stress thresholds for livestock (oF): 70–72 dairy cows 72–75 beef cows 72–74 pigs 70–78 chickens B1 lower A1fi higher HIGH-RESOLUTION CLIMATE PROJECTIONS ECOSYSTEMS: NORTHEAST Tree species distribution INFRASTRUCTURE: THE CITY OF CHICAGO WATER: GREAT LAKES Climate change impacts by city department Historic A1fi higher B1 lower The high-resolution projection at the center shows the number of weeks per year of days with Tmax > 100oF. Projection is for 2070-2099 under the SRES A1fi (higher) scenario based on the average from GFDL CM2.1, PCM and HadCM3, downscaled to one-eighth degree resolution using a VIC-based statistical downscaling approach. Health: used RCM coupled with CMAQ to calculate projected changes in surface- level ozone by 2050s relative to 2090s. PCM A1fi vs B1. Ecosystems: Louis Iverson (USFS)’s forest model driven by GFDL/HadCM3/PCM A1fi/B1 simulations for 2070-2099 relative to 1961-1990 Infrastructure: the work of Oliver Wyman, appearing in upcoming JGLR special issue Agriculture: after Wolfe et al 2008 Mitigation & Adaptation Strategies for Global Change – values for 2070-2099 are shown. Historic map (1961-1990) is blank – i.e., no heat stress at all. Water: using Tom Croley’s GLERL lake level model, transient simulations driven by GFDL CM2.1, HadCM3 and PCM A1fi and B1 temperature & precipitation Mean lake level for Lake Superior