Atmospheric Chemistry and Physics www.atmos-chem-phys.net 1680-7316 1680-7324 9 11 2009 10.5194/acp-9-3745-2009 http://www.atmos-chem-phys.net/9/3745/2009/ http://www.atmos-chem-phys.net/9/3745/2009/acp-9-3745-2009.html http://www.atmos-chem-phys.net/9/3745/2009/acp-9-3745-2009.pdf 3745 3754 2009-06-10 Impact of climate change on photochemical air pollution in Southern California D. E. Millstein R. A. Harley harley@ce.berkeley.edu Department of Civil and Environmental Engineering University of California, Berkeley, CA 94720-1710, USA The effects of future climate and emissions-related perturbations on ozone air quality in Southern California are considered, with an assumed increase to 2× pre-industrial levels for global background levels of carbon dioxide. Effects of emission and climate-related forcings on air quality are superimposed on a summer 2005 high-ozone time period. 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