Investigation on the Relationship between Sulfate Aerosol and Air Mass Trajectories over the Oki Island
Li Yintang, Li Jun, Liu Yanhua, Chang Li
(Xi'an Jiaotong University, Xi'an 710049, China)

Abstract: By analysis the data of monthly-averaged nss-sulfate aerosols concentrations recorded in an three-year period, it is found that there is a regular sulfate concentration wave over the Oki Islandin the Japanese Ses in the west side of Japan. The sulfate concentration on the island changes monthly with the air mass frequency from two sides:west and east. The air masses from east have the sulfate aerosols accummlated to form a comcentration wave in spring and early summer,and ones from west have the wave concentration dispelled in autumm and winter. When the air mass frequency from one side arrives at its maximum, the sulfate concentration is the representative value of this side approximately. They are 2.30 and 4.50 micro gram per cubic meter for the air masses from Asia continent and Japan side, respectively.
Keywords: atmospheric diffusion;sulfate aerosol;sulfate concentration wave