エアロゾル全球化学輸送モデル (AGCTM) の開発と応用

Abstract

A global scale chemical transport model for gaseous and aerosol species (AGCTM) has been developed to study possible effects of changes in human and natural emission activities on atmospheric environment and the Earth's environment. The AGCTM simulation as well as Lagrange particle simulation was performed for about 40 days from Feb. 21 to March 31, 2001 during TRACE-P field campaign. In the Lagrange particle simulation, emission areas for yellow sand and anthropogenic pollutant in China, Korea, Taiwan, and Japan were identified, and movements of the hypothetical non-buoyant particles released from the areas were kept tracked for one week. A technique to label particles with different colors for those released on different days allowed us to estimate spatial distribution of aged air-mass. In the AGCTM simulation, calculated results were compared with TRACE-P airborne observation, TOMS Aerosol Index, and surface observation in China.