Journal of Geographical Sciences ›› 2019, Vol. 29 ›› Issue (2): 253-270.doi: 10.1007/s11442-019-1595-0

• Research Articles • Previous Articles     Next Articles

Spatio-temporal evolution and the influencing factors of PM2.5 in China between 2000 and 2015

Liang ZHOU1,2(), Chenghu ZHOU2, Fan YANG3, Lei CHE4, Bo WANG5, Dongqi SUN2,*()   

  1. 1. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China
    2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
    3. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China
    4. College of Geography and Environment Sciences, Northwest Normal University, Lanzhou 730070, China
    5. Department of Geography, The University of Hong Kong, Hong Kong 999077, China
  • Received:2018-05-10 Accepted:2018-10-22 Online:2019-02-25 Published:2019-03-20
  • Contact: Dongqi SUN E-mail:zhougeo@126.com;sundq@igsnrr.ac.cn
  • About author:

    Author: Zhou Liang, PhD and Associate Professor, specialized in environmental geography, urban geography and regional development. E-mail: zhougeo@126.com

  • Supported by:
    The Strategic Priority Research Program of the Chinese Academy of Sciences, No.XDA19040401;China Postdoctoral Science Foundation, No.2016M600121;National Natural Science Foundation of China, No.41701173, No.41501137;The State Key Laboratory of Resources and Environmental Information System

Abstract:

High concentrations of PM2.5 are universally considered as a main cause for haze formation. Therefore, it is important to identify the spatial heterogeneity and influencing factors of PM2.5 concentrations for regional air quality control and management. In this study, PM2.5 data from 2000 to 2015 was determined from an inversion of NASA atmospheric remote sensing images. Using geo-statistics, geographic detectors, and geo-spatial analysis methods, the spatio-temporal evolution patterns and driving factors of PM2.5 concentration in China were evaluated. The main results are as follows. (1) In general, the average concentration of PM2.5 in China increased quickly and reached its peak value in 2006; subsequently, concentrations remained between 21.84 and 35.08 μg/m3. (2) PM2.5 is strikingly heterogeneous in China, with higher concentrations in the north and east than in the south and west. In particular, areas with relatively high PM2.5 concentrations are primarily in four regions, the Huang-Huai-Hai Plain, Lower Yangtze River Delta Plain, Sichuan Basin, and Taklimakan Desert. Among them, Beijing-Tianjin-Hebei Region has the highest concentration of PM2.5. (3) The center of gravity of PM2.5 has generally moved northeastward, which indicates an increasingly serious haze in eastern China. High-value PM2.5 concentrations have moved eastward, while low-value PM2.5 has moved westward. (4) Spatial autocorrelation analysis indicates a significantly positive spatial correlation. The “High-High” PM2.5 agglomeration areas are distributed in the Huang-Huai-Hai Plain, Fenhe-Weihe River Basin, Sichuan Basin, and Jianghan Plain regions. The “Low-Low” PM2.5 agglomeration areas include Inner Mongolia and Heilongjiang, north of the Great Wall, Qinghai-Tibet Plateau, and Taiwan, Hainan, and Fujian and other southeast coastal cities and islands. (5) Geographic detection analysis indicates that both natural and anthropogenic factors account for spatial variations in PM2.5 concentration. Geographical location, population density, automobile quantity, industrial discharge, and straw burning are the main driving forces of PM2.5 concentration in China.

Key words: air pollution, PM2.5, haze, spatio-temporal evolution, environmental influence, China