[1] Bao J Z, Yang X P, Zhao Z Y et al., 2015. The spatial-temporal characteristics of air pollution in China from 2001-2014. En-vironmental Research and Public Health, 12(12):15875-15887. doi: 10.3390/ijerph121215029
[2] Chen Yonglin, Xie Binggeng, Yang Yong, 2015. Distribution of the urban air quality in the major city clusters in China and the influencing factors. Journal of Arid Land Resources and En-vironment, 29(11):99-103. (in Chinese)
[3] Duan Yusen, Wei Haiping, Fu Qingyan et al., 2008. Regional spa-tio-temporal mode differences of air pollution index of key environmental protection cities in China. Acta Scientiae Cir-cumstantiae, 28(2):384-391. (in Chinese)
[4] Hu J L, Wang Y G, Ying Q et al., 2014. Spatial and temporal var-iability of PM2.5 and PM10 over the North China Plain and the Yangtze River Delta, China. Atmospheric Environment, 95:598-609.
[5] Li Mingsheng, Zhang Jianhui, Zhang Yinjun et al., 2013. Spa-tio-temporal pattern changes of ambient air PM10 pollution in China from 2002 to 2012. Acta Geographica Sinica, 68(11):1504-1512. (in Chinese)
[6] Li Song, Luo Xueqiang, Li luan et al., 2015. Spatial distribution model of countrywide PM2.5 concentration and influence factors using geographical information system. Bulletin of Soil and Water Conservation, 35(4):202-205, 212. (in Chinese)
[7] Li Wenjie, Zhang Shihuang, Gao Qingxian et al., 2012. Relation-ship between temporal-spatial distribution pattern of air pollu-tion index and meteorological elements in Beijing, Tianjin and Shijiazhuang. Resources Science, 34(8):1392-1400. (in Chi-nese)
[8] Li Xiangyang, Ding Xiaomei, Gao Hong et al., 2011. Characteris-tics of air pollution index in typical cities of North China. Journal of Arid Land Resources and Environment, 25(3):96-101. (in Chinese)
[9] Lin Xueqin, Wang Dai, 2016. Spatio-temporal variations and socio-economic driving forces of air quality in Chinese cities. Acta Geographica Sinica, 71(8):1357-1371. (in Chinese)
[10] Ma Xiaoqian, Liu Zheng, Zhao Xueyang et al., 2016a. The spatial and temporal variation of haze and its relativity in the Bei-jing-Tianjin-Hebei region. Areal Research and Development, 35(2):134-138. (in Chinese)
[11] Ma Z W, Hu X F, Sayer A M et al., 2016b. Satellite-based spatio-temporal trends in PM2.5 concentrations:China, 2004-2013. Environmental Health Perspectives, 124(2):184-192. doi: 10.1289/ehp.1409481
[12] Meng Xiaoyan, Wang Ruibin, Zhang Xin et al., 2012. Concentra-tion variations of main pollutants in key environmental protec-tion cities in China during 2006-2010. Research of Environ-mental Sciences, 25(6):622-627. (in Chinese)
[13] Ministry of Ecology and Environment Data Center. Available at:http://datacenter.mep.gov.cn/websjzx/queryIndex.vm. (in Chinese)
[14] Niu Huimin, Tu Jianjun, Yao Zuolin et al., 2016. Spatial and Temporal Distribution Characteristics of Air Quality in China's Cities. Henan Science, 34(8):1317-1321. (in Chinese)
[15] Sheng N, Tang U W, 2016. The first official city ranking by air quality in China-A review and analysis. Cities, 51:139-149. doi: 10.1016/j.cities.2015.08.012
[16] Sun Dan, Du Wupeng, Gao Qingxian et al., 2012. Change char-acteristics of API of several typical cities within three urban agglomerations in China from 2001 to 2010. Resources Science, 34(8):1401-1407. (in Chinese)
[17] Wang D, Liu Y, 2016. Spatio-temporal differences and driving forces of air quality in Chinese cities. Journal of Resources and Ecology, 7(2):77-84. doi:10.5814/j.issn.1674-764x.2016. 02.001
[18] Wang Y G, Ying Q, Hu J L et al., 2014. Spatial and temporal vari-ations of six criteria air pollutants in 31 provincial capital cities in China during 2013-2014. Environment International, 73:413-422. doi: 10.1016/j.envint.2014.08.016
[19] Wang Zhanshan, Li Yunting, Chen Tian et al., 2014. Temporal and spatial distribution characteristics of ozone in Beijing. En-vironmental Science, 35(12):4446-4453. (in Chinese)
[20] Wang Zhanshan, Li Yunting, Chen Tian et al., 2015. Spatial-temporal characteristics of PM2.5 in Beijing in 2013. Acta Ge-ographica Sinica, 70(1):110-120. (in Chinese)
[21] Xu Shan, Zou Bin, Pu Qiang et al., 2015. Impact analysis of land use/cover on air pollution. Journal of Geo-Information Science, 17(3):290-299. (in Chinese)
[22] Yang Kun, Yang Yulian, Zhu Yanhui et al., 2016. Social and eco-nomic drivers of PM2.5 and their spatial relationship in China. Geographical Research, 35(6):1051-1060. (in Chinese)
[23] Zang Xinghua, Lu Yintao, Yao Hong et al., 2015. The temporal and spatial distribution characteristics of main air pollutants in China. Ecology and Environment Sciences, 24(8):1322-1329. (in Chinese)
[24] Zhang A, Qi Q W, Jiang L L et al., 2013. Population exposure to PM2.5 in the urban area of Beijing. PLoS One, 8(5):e63486. doi: 10.1371/journal.pone.0063486
[25] Zhang H F, Wang Z H, Zhang W Z, 2016. Exploring spatiotem-poral patterns of PM2.5 in China based on ground-level obser-vations for 190 cities. Environmental Pollution, 216:559-567. doi: 10.1016/j.envpol.2016.06.009
[26] Zhang Yinjun, Chen Xi, Xie Gaodi et al., 2015. Pollution status and spatial distribution of PM2.5 in China. Resources Science, 37(7):1339-1346. (in Chinese)
[27] Zhao Keming, Li Xia, Lu Xinyu et al., 2014. Wintertime tem-poral-spatial distribution characteristics of air pollutants in mountain gap town Urumqi. Arid Land Geography, 37(6):1108-1118. (in Chinese)
[28] Zhou Kan, Fan Jie, 2016. Regional disparity of environmental pollution source and its socio-economic influencing factors:Based on the cross-section data of 339 cities at prefecture level or above in China. Acta Geographica Sinica, 71(11):1911-1925. (in Chinese)