"ATMOSPHERIC CHEMISTRY: FROM AIR POLLUTION TO GLOBAL CHANGE AND BACK"
Progress in our understanding of the chemistry of Earth's atmosphere over the past decades has been driven by concerns over air pollution and global change. These concerns have been merging recently in issues involving the climatic effects of air pollutants and the intercontinental transport of pollution. Satellite observations of the lower atmosphere (troposphere), though still in their infancy, hold great promise for helping us to address such linkages between regional and global scales. In this talk I will review the air pollution problem in the United States and in the rest of the world, and examine the importance of intercontinental transport of pollution. I will then examine the climatic impacts associated with the long-range transport of major pollutants (ozone, aerosols) and discuss the implications for policy. Particular focus will be placed on the future role of satellite observations.