Journal of Ecology and Rural Environment ›› 2019, Vol. 35 ›› Issue (2): 174-179.doi: 10.19741/j.issn.1673-4831.2017.0818

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Research on the Spatial Distribution and Correlation of PM2.5 in Beijing-Tianjin-Hebei Urban Agglomeration

LI Xue-mei1,2, XU Dong-ming3   

  1. 1. Tianjin Chengjian University, Tianjin 300384, China;
    2. Urbanization and New Rural Construction Research Center of Tianjin, Tianjin 300384, China;
    3. Yancheng Country Garden Real Estate Development Corporation, Nanjing 224000, China
  • Received:2017-11-30 Online:2019-02-25 Published:2019-03-25


Based on daily averaged values of PM2.5 mass concentration in Beijing-Tianjin-Hebei Urban Agglomeration from 2014 to 2016, this study employed ArcGIS 10.2 to analyze the temporal-spatial characteristics of pollution distribution. The spatial correlation of indices such as the percentage of superior, heavily and severely polluted days during typical PM2.5 months was also performed. The results show that the profile of the monthly rate of non-polluted days was consistent with the trend of the overall air quality fluctuation during the observation period. The higher proportion of PM2.5-superior period was concentrated from May to September. The heavily and severely polluted days spanned between November and February. From the regional distribution, the proportional spatial pattern of PM2.5 heavy and severe pollution decreased from central cities as Shijiazhuang and Baoding to surrounding places. The typical months were selected to carry out spatial correlation of PM2.5. Corresponding results indicate that PM2.5 had a positive spatial correlation. The spatial distribution of PM2.5 mass concentration showed spatial clustering profile.

Key words: PM2.5, temporal and spatial distribution, spatial correlation, Beijing-Tianjin-Hebei Urban Agglomeration

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