Characteristics of atmospheric aerosol optical depth variation over China in recent 30 years

摘要

This note retrieves the annual and monthly mean 0.75 μm aerosol optical depth (AOD) by using the daily direct solar radiation and sunshine duration data of 47 solar stations from 1961 to 1990. The characteristic of AOD variation over China in recent 30 years was analyzed. The results indicate That AOD increased obviously over China from 1961 to 1990. AOD increased most rapidly over the east Part of Southwest China, the middle-and-lower reaches of the Yangtze River and the Tibetan Plateau.