Variation of atmospheric turbidity coefficient and global solar radiation over Japan

Abstract

Atmospheric aerosols affect on the global climate by changing the energy balance of earth-atmosphere system through scattering and absorption of solar radiation. Atmospheric turbiditycoefficients and global solar radiation were calculated in 14 cites in Japan from 1995 to 2005. Theatmospheric turbidity coefficient show increase in spring and decrease in autumn. The high values arederived from long range transport of dust aerosols originated in continent in China, or highconcentration of aerosols under by weak wind in calm day. The global solar radiation shows decreasefrom 1960 to 1980s, and shift to increase on reaching 1980s.