[1] [1] Zhang C C, Zhou W X. Atmospheric Aerosol Tutorial[M]. Beijing: China Meteorological Press, 1995(in Chinese).

[2] [2] Zhang H, Huang J P．Interpretation of the IPCC Fifth assessment report on anthropogenic and natural radiative forcing[J]. Progressus Inquisitiones De Mutatione Climatis, 2014, 10(1): 40-44(in Chinese).

[3] [3] Ramachandran S.Aerosol optical depth and fine mode fraction variations deduced from moderate resolution imaging spectroradiometer (MODIS) over four urban areas in India[J]. Journal of Geophysical Research, 2007, 112(D16): D16207.

[4] [4] Zhao S W, Gao X Q. Analysis ofspatio-temporal distribution and variation characteristics of aerosol Optical Depth over the Northwest of China by MODIS C6 Product[J]. Environmental Science, 2017, 38(7):2637-2646(in Chinese).

[5] [5] Deng X L, Deng W T, He D Y. Spatial-temporal features of atmospheric aerosol in east china in recent years[J].Transactions of Atmospheric Sciences, 2010, 33(03): 347-354(in Chinese).

[6] [6] Bai S Y, Shi J Q, Pu J,et al. Spatio-temporal variations of aerosol optical depth in the Yangtze River Basin during 2000-2011[J], Ecology and Environmental Sciences, 2012, 21(09): 1567-1573(in Chinese).

[7] [7] Liu Z, Sun X L, Liu D,et al. Spatio-temporal characteristics of aerosol optical depth over Beijing-Tianjin Hebei-Shandong-Henan-Shanxi-Shaanxi region during 2001-2017[J]. Acta Scientiae Circumstantiae, 2018,38(08): 3177-3184(in Chinese).

[8] [8] Li X J, Gao L, Zhang X Y, et al. Global change of aerosol optical depth based on satellite remote sensing data[J]. Science & Technology Review, 2015, 33(17): 30-40(in Chinese).

[9] [9] Zhang X Y, Hu H B.Spatio-temporal characteristics of aerosol optical depth and their relationship with urbanization over Beijing-Tianjin-Hebei region[J]. Chinese Journal of Atmospheric Sciences, 2017, 41(4): 797-810(in Chinese).

[10] [10] Xue W B, Wu W L, Wang J N,et al. Analysis on space-time characteristics of aerosol optical depthin china[J]. Environment and Sustainable Development, 2013, 38(04): 17-20(in Chinese).

[11] [11] Levy R C, Mattoo S, Munchak L A, et al. The collection 6 MODIS aerosol products over land and ocean[J]. Atmospheric Measurement Techniques, 2013, 6(11): 2989-3034.

[12] [12] Hsu N C,Jeong M J, Bettenhausen C, et al. Enhanced deep blue aerosol retrieval algorithm:the second generation[J]. Journal of Geophysical Research: Atmospheres, 2013, 118(16): 9296-9315.

[13] [13] Remer L A,Mattoo S, Levy R C, et al. MODIS 3 km aerosol product: algorithm and global perspective[J]. Atmospheric Measurement Techniques, 2013, 6(1): 69-112.

[14] [14] Wu D,Hou Y T, Zhang Y Q. Transporting real-time video over the intemet challenges and approaches[J]. Proceeding of the IEEE, 2000, 88(12): 1855-1875.

[15] [15] Zhou S B, Xu Z Y, Tang X Q. New method for determining optimal number of clusters in K-means clustering algorithm[J]. Computer Engineering and Applications, 2010, 46(16): 27-31(in Chinese).

[16] [16] Zhang W J, Gu X F, Chen L F, et al. An algorithm for initilizing of K-means clustering based on mean-standard deviation[J]. Journal of Remote Sensing, 2006, (05): 715-721(in Chinese).