It is widely believed that increasing concentrations of greenhouse gases in the atmosphere may lead to long-term changes in regional and global climate. Possible effects include changes in mean and diurnal temperature, the hydrological cycle, cloud cover, wind speed, turbulent mixing in the boundary layer, extratropical storms, and extreme events (IPCC, 2001). Key goals of this study are to quantify interactions and feedback effects among complex meteorological and chemical processes and to develop datasets that can be used for both continental and high-resolution urban modeling studies. By developing and evaluating a coupled modeling system for simulating effects of climate on air quality, this study will lead to better tools for developing optimal air pollution control strategies and for protecting human health and quality of life in a changing climate. Although this research has not yet been funded, we are continuing to seek funding for research on the effects of climate on air quality and human health.