Aerosol optical depth (AOD) is one of the most important parameters in describing aerosol optical characteristics. It is widely used in researched on air quality monitoring and atmospheric correction based on radiative transfer model. A wide range of aerosol information can be fast obtained and retrieved using satellite remote sensing technology. While, satellite retrieved aerosol product has low spatial coverage because of the limitation of cloud coverage and dark target algorithm, and the time phase of the product is limited by satellite overpass time. Horizontal meteorological visibility (HMV) is another very important parameter in describing aerosol optical characteristics. It is observed 8 fixed times one day by widely distributed meteorological sites in China. It can be a good supplement of satellite retrieved aerosol optical depth data by building the convention relationship between aerosol optical depth data and horizontal meteorological visibility data. In this study, MODIS aerosol optical depth product from 2001 to 2009 and horizontal meteorological visibility data from 71 meteorological sites located in Eastern China were chosen as the research data. The research data was used to optimize Peterson model which describes the relationship between aerosol optical depth and horizontal meteorological visibility. Aerosol scale height is the main parameter that influences the conversion accuracy between aerosol optical depth and horizontal meteorological visibility. By regional Gaussian fitting method, the temporal trends of aerosol scale height were fitted. The aerosol optical depth data and horizontal meteorological visibility data in 2010 were used to validate the accuracy and the regional applicability of the optimized model. The result shows the RMSE of aerosol optical depth estimation of optimized model is 0.31, which is lower than that of Peterson model. Compared with the single site optimized model, the accuracy is similar, while the application of regional optimized model is better than the single site optimized model.
CHEN Yun-Zhu, SHI Run-He, WANG Chao, CHEN Yuan-Yuan, GAO Wei
. Estimating Aerosol Optical Depth Based on Regional Optimized Peterson Model[J]. Journal of Geo-information Science, 2013
, 15(2)
: 241
-248
.
DOI: 10.3724/SP.J.1047.2013.00241
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