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Temporal and spatial distribution of aerosol optical depth in Chizhou based on satellite remote sensing |
ZHANG Mingming, CHENG Dongbing, QI Jianhua, HU Jianchun, LUO Jing |
Chizhou Meteorological Bureau of Anhui, Chizhou 247100, China |
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Abstract Aerosol optical depth (AOD) is a key indicator of the atmospheric environment, which can be used to represent the degree of atmospheric pollution. Obtaining AOD by satellite remote sensing can make up for the lack of the spatial distribution of AOD and the trend of overall change by ground-based observation. With Chizhou City as the study area, the authors retrieved AOD of four seasons in 2014 using the improved dense dark vegetation method(V5.2 method)based on EOS-MODIS data and analyzed spatial and temporal distribution of AOD after verifying its reliability. The research results show that there is a good consistency in the overall change trend between the AOD retrieved from MODIS and that from MOD04_3K, but they also have some differences, especially in the winter half year. There is a remarkable difference of AOD distribution both regionally and seasonally. Overall performance in the northern part of the AOD is significantly higher than in the south, and spring and summer seasons are higher than the autumn and winter seasons, while different regional trends are different. The temporal and spatial changes of AOD are strongly influenced by natural factors and human factors.
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Keywords
land and resources satellites
geology and mineral resources
application benefits
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Issue Date: 04 December 2017
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