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We examine the air quality (AQ) and radiative forcing (RF) response  to emissions reductions by economic sector for North America and developing Asia in the CAM and GISS composition/climate models. Decreases in annual average surface particulate are relatively  robust, with intermodel variations in magnitude typically <30% and  very similar spatial structure. Surface ozone responses are small and  highly model dependent. The largest net RF results from reductions  in emissions from the North America industrial/power and developing  Asia domestic fuel burning sectors. Sulfate reductions dominate the  first case, for which intermodel variations in the sulfate (or total)  aerosol optical depth (AOD) responses are ~30% and the modeled  spatial patterns of the AOD reductions are highly correlated  (R=0.9). Decreases in BC dominate the developing Asia domestic  fuel burning case, and show substantially greater model-to-model differences. Intermodel variations in tropospheric ozone burden  changes are also large, though aerosol changes dominate those  cases with substantial net climate forcing. The results indicate that  across-the-board emissions reductions in domestic fuel burning in  developing Asia and in surface transportation in North America are  likely to offer the greatest potential for substantial, simultaneous  improvement in local air quality and near-term mitigation of global  climate change via short-lived species. Conversely, reductions in  industrial/power emissions have the potential to accelerate  near-term warming, though they would improve AQ and have a long-term cooling effect on climate. These broad conclusions appear  robust to intermodel differences

Climate forcing and air quality change due to regional emissions reductions by economic sector