title: The Spatial-Temporal Characteristics of Air Pollution in China from 2001-2014.
abstract: To provide some useful information about the control of air pollution in China, we studied the spatial-temporal characteristics of air pollution in China from 2001-2014. First, we drew several line charts and histograms of the Air Pollution Index (API) and Air Quality Index (AQI) of 31 capital cities and municipalities to research the distribution across different times and cities; then, we researched the spatial clustering of API and AQI; finally, we examined the shift of the gravity center of API and AQI in different years and months. The API values had a decreasing trend: the high values had a clustering trend in some northern cities, and the low values had a clustering trend in some southern cities. The AQI values were relatively low, from 15:00-17:00 during the day. The gravity center of API had a trend of moving south from 2001-2003, then fluctuated in an unordered pattern and moved north in the winter. The AQI gravity center did not have a regular shift during different months. In conclusion, the government should take action to mitigate air pollution in some typical cities, as well as air pollution during the winter.
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, # 185 Donghu Road, Wuhan 430071, China. junzhe_bao@126.com.
authors.forename: Junzhe
authors.initials: J
authors.lastname: Bao
authors.affiliation: State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129 Luoyu Road, Wuhan 430079, China. 0yangxiping0@163.com.
authors.forename: Xiping
authors.initials: X
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129 Luoyu Road, Wuhan 430079, China. zhaozhiyuan@whu.edu.cn.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, # 185 Donghu Road, Wuhan 430071, China. wongzhenkun@gmail.com.
authors.forename: Zhenkun
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, # 185 Donghu Road, Wuhan 430071, China. yuchua@163.com.|Global Health Institute, Wuhan University, # 8 Donghunan Road, Wuhan 430072, China. yuchua@163.com.
authors.forename: Chuanhua
authors.initials: C
authors.lastname: Yu
authors.affiliation: Office of Epidemiology, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Changping District, Beijing 102206, China. lixd@chinacdc.cn.
authors.forename: Xudong
authors.initials: X
authors.lastname: Li
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000032:analysis / Q000706:statistics & numerical data*; D002681:China; D002947:Cities; D004784:Environmental Monitoring; D052638:Particulate Matter / Q000032:analysis; D012621:Seasons; D062211:Spatio-Temporal Analysis
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter
keywords: Air Pollution Index; Air Quality Index; shift of gravity center; spatial-temporal characteristics