This international conference will provide a technical forum on advances in the scientific understanding of the effects of aerosol on urban, regional, continental and global scale haze and radiation balance. The conference will specifically address: emission sources, atmospheric conditions and aerosol characteristics associated with haze and aerosol urban visibility; regional haze; climate forcing; innovative aerosol, haze and radiation balance monitoring assessments and modeling methods; and urban and regional haze and aerosol climate forcing policy, regulatory, and economic issues related to implementation of U.S. EPA standards and rules, including the adopted emissions controls in state and EPA permits, rules, and implementation plans for the Regional Haze Rule and the expected impact of the anticipated PM Visibility and SO2/NOx Secondary Standards.

Recent work has suggested a much greater importance for black carbon particles in radiative forcing so sessions on black carbon are planned.Sessions related to the synergistic and increasing concerns of the effects of atmospheric nitrogen and carbonaceous material on haze, climate change and nitrogen deposition on ecosystems are also planned. Panel sessions related to current hot topics will also be developed. Two or more professional courses, designed to provide both a technical foundation and a timely refresher, will be offered on-site prior to the conference. There is also a photo contest planned, as well as a mid-conference field trip to the Glacier National Park Class I area.

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