Abstract
This paper proposes a general procedure to link meteorological data with air quality models, such as U.S. EPA's Models-3 Community Multi-scale Air Quality (CMAQ) modeling system. CMAQ is intended to be used for studying multi-scale (urban and regional) and multi-pollutant (ozone, aerosol, and acid/nutrient depositions) air quality problems. The Models-3 CMAQ system is expected to be a common vehicle to advance environmental modeling techniques for scientists and the regulatory community. To provide multi-scale capability for meteorological and air quality modeling, a set of governing equations for the fully compressible atmosphere is introduced. By recasting input meteorological data with the variables that satisfy the governing equations in a generalized coordinate system, CMAQ can follow the dynamics and thermodynamics of the meteorological model closely. A robust mass conservation scheme is introduced and discussed.
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