Retrieving aerosol optical depth over Nanjing City based on TM image

doi:10.6046/gtzyyg.2013.03.16

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Abstract

Aerosol is an important factor which not only influences land-atmosphere energy balance and climate change but also affects the environmental quality of human life. Based on TM image of Landsat 5, the authors built up a look-up table by 6S atmospheric radiative transfer model, and then got the aerosol optical depth (AOD) of the dark pixels based on regression analysis. After that, the spatial distribution of AOD over Nanjing City was calculated by kriging interpolation. The results were tested by atmospheric correction and an analysis was made on the inversion results at last. The results show that the TM images, which have a higher resolution, can be used to retrieve AOD accurately through the "dark pixel" method, that the AOD value in the north of Nanjing is relatively higher than that in the south, that the distribution of vegetation, urban area and elevation in Nanjing City is the main factor influencing the distribution of AOD, and that high resolution images are capable of obtaining more details of the spatial distribution of aerosol than low resolution images in the urban area.

Keywords image intelligence multi-source spatial data integration Com GIS SuperMap SDX+

TP 79

Issue Date: 03 July 2013

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	WANG Shoubiao
	YANG Guang
	TAN Haifeng
	YE Yi
	TONG Tao

Cite this article:

WANG Shoubiao,YANG Guang,TAN Haifeng, et al. Retrieving aerosol optical depth over Nanjing City based on TM image[J]. REMOTE SENSING FOR LAND & RESOURCES, 2013, 25(3): 90-96.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2013.03.16 OR https://www.gtzyyg.com/EN/Y2013/V25/I3/90

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