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| Spatial and temporal distribution of aerosol optical depth in China based on MODIS |
| Shan Nan, Yang Xiaohui, Shi Zhongjie, Yan Feng |
| Institute of Desertification Studies,Chinese Academy of Forestry,100091,Beijing,China |
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Abstract Characteristics of spatial and temporal distribution and variation trends of aerosol optical depth (AOD,on 550 nm) in China were analyzed by linear regression and correlation analysis in this paper with monthly mean data by the NASA MODIS08_C5 product from 2000 to 2008. The results indicate that the all-year high value of AOD occurred in the southern Sinkiang basin, the Yangtze river region and the Sichuan basin. There are significant differences in seasonal variation of AOD, but the trend was increased first and then decreased in most areas during the year. AOD reaches its maximum value in April. The monthly average of AOD and the sum occurrence times of sand-dust had an obvious relationship. The monthly occurrence frequency of dust and the monthly mean AOD showed a significant linear correlation where the dust occurred more than 10 times, otherwise there was no obvious relations between them.
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Received: 30 March 2012
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