Abstract
The CMAQ (Community Multi-scale Air Quality) model based on the RAMS (Regional Atmospheric Modeling System) for the Asian Domain was developed and the detailed descriptions of the model system and the available options are described. Emission inventory based on Streets et al., (2003a, b) and the volcanic gas emissions from Miyakejima-Oyama is used in this system. The developed RAMS/CMAQ system was used in the Asian scale gas/aerosol transport simulation during March and April 2001 with an 80 km horizontal resolution. RAMS precipitation intensity and distribution, and the CMAQ output (SO2, O3, SO4, EC and OC) are compared with observation data from the Japan Meteorological Agency, EANET and VMAP (Matsumoto et al., 2003), and we confirmed that both the precipitation and concentration fields represent the majorobserved distribution well. Sensitivity analysis of the effects of volcanic gas emissions from Miyakejima-Oyama revealed that its effects are important for air quality over the central and northern Japan areas.
