Seasonal Change In Aerosol Effects In China Simulated By General Circulation Model

Abstract

This study intends to investigate the seasonal change in anthropogenic aerosol effects in China, where anthropogenic aerosol are increasing with fossil fuel consumption increase, upon the climate change by the aerosols interacting with the radiation budget. For this purpose, we used an aerosol transport model coupled to a general circulation model. Our simulated results show significant seasonal variation between summer and winter aerosol optical thickness and the seasonal variation influences the aerosol effects on surface radiation. Aerosol direct and indirect effects are greater in summer than in winter due to large aerosol loading in summer especially in Northern China. In the other hand, the seasonal change in aerosol effects is small in Southern China. Because aerosol direct effect is slightly larger in winter and aerosol indirect effect is larger in summer. It is thought that the more noticeable amount of cloud is larger in summer over China.