ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Remote Sensing Retrieval and SpatioTemporal Analysis of Aerosol over Three Cities of Fujian
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Abstract:
It has being more and more noticed by people that aerosol impact on city environment. On the basis of sensitivity test to the aerosol made for the planetary albedo of red, blue and nearinfrared channel of MODIS data, the aerosol optical depth over three cities, Fuzhou, Xiamen, and Quanzhou of Fujian Province is retrieved based on 6S model and dark target method by using MODIS data during 2001-2007, the precision of aerosol optical depth (AOD) retrieved from MODIS data is verified with the station observed data of air environment over Fuzhou urban during 2001-2007, the spatiotemporal distribution and change characteristics of AOD over the three cities are analyzed. The results showed that the red and blue channel data of MODIS is sensitive to the AOD, although the sensitivity of different season is variational. The relationship index between AOD retrieved from MODIS and PM10 observed from station is 0.604. It is the same that distribution of high value area of AOD is consistent with the distribution of urban, and the value of AOD in autumn and winter seasons is higher than other seasons. The remote sensing retrieval of AOD over three cities of Fujian based on MODIS data is credible, and the retrieved AOD can truly describe the spatiotemporal distribution and change characteristics over the study region.
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