中国空气质量时空变化特征

doi:10.13249/j.cnki.sgs.2020.02.004

Abstract

Abstract:

Cross-regional air pollution control is an urgent problem in ecological civilization construction. Based on the daily air quality index (AQI) data of 343 districts in China in 2015, used the statistical analysis and spatial autocorrelation analysis method, the temporal and spatial distribution features of air quality in China and nine regions of the terrestrial surface system was analyzed. The results show that: 1) The seasonal mean values of AQI in the whole country and nine major regions show the air quality is worse in spring, is excellent in summer and autumn, and falls to its worst in winter. Meanwhile, the seasonal mean values of AQI show a “U” shape. 2) The monthly mean values of AQI in the whole country and nine major regions show a “L” shape. 3) The daily mean values of AQI in the whole country and nine major regions show a periodic W-pulse fluctuation pattern. 4) The “hot spot” and “cold spot” regions demonstrate the differential pattern of being high and hot in the North and being low and cold in the South. 5) The frequency structure of the primary pollutant in the nine regions is significantly diversified, and the highest frequency of the primary pollutant PM_2.5 or PM₁₀ has a clear differential pattern between the East and the West.

Key words: air quality, spatial autocorrelation, nine regions, China

CLC Number:

X144

Zhang Xiangmin, Luo Shen, Li Xingming, Li Zhuofan, Fan Yong, Sun Jianwu. Spatio-temporal Variation Features of Air Quality in China[J].SCIENTIA GEOGRAPHICA SINICA, 2020, 40(2): 190-199.

Figures/Tables 5

References 28

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Spatio-temporal Variation Features of Air Quality in China

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