化学物質輸送モデルによって示された ACE-Asia 期間におけるアジア域のエアロゾル輸送とその水平面分布

概要

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The regional scale aerosol transport model (CFORS) was used in the analysis of Asian aerosol transport during the ACE-Asia intensive observation. CFORS aerosol fields were examined with the Mie scattering Lidar observation and satellite driven aerosol index, and accurately reproduced many observed features. In these comparisons, we found that an extremely large dust event that occurred in early April was produced by several dense dust layers between the boundary layer and upper troposphere. Analyses of CFORS AOTs showed that aerosol of different kinds are almost simultaneously transported over downwind regions. Analyses of aerosol horizontal fluxes clearly showed transport trends: the main dust flow is eastward along the 40°N and the carbonaceous flow in the free atmosphere is along about 30°N from south-east Asia. Finally, the regional budgets are examined and dry deposition, gravitational settling, and wet deposition of dust accounted for 33 %, 27 %, and 9 % of total emissions, respectively. Regarding carbonaceous aerosols, the eastward outflow has the highest fraction (49 %) . Transport in the free atmosphere is an important transportation process of Asian carbonaceous aerosols.
日本エアロゾル学会の論文
2004-06-20