Spatial heterogeneity of driving factors of urban haze pollution in China based on GWR model
WANG Shaojian1, GAO Shuang1, CHEN Jing21. Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China 2. School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
Received:2018-12-18Revised:2019-09-3Online:2020-03-20 作者简介 About authors 王少剑(1986-),男,河南驻马店人,博士,副教授,主要研究方向为城市地理、城市与区域规划E-mail:1987wangshaojian@163.com。
Abstract Based on the PM2.5 monitoring data of China's cities, we identified the spatial and temporal distribution characteristics of PM2.5 concentrations, and used the geographically weighted regression (GWR) model to analyze emphatically the spatial heterogeneity of the influence of natural factors and socio-economic factors on PM2.5 concentrations. The results showed that: in 2015, the average annual concentrations of PM2.5 in China was 50.3 μg/m 3, and the monthly concentration change presented a "U-shaped" pattern with a higher level in autumn and winter while a lower one in spring and summer. In addition, PM2.5 concentrations were high in cities of eastern and northern China, but low in cities of southern and western China. Beijing-Tianjin-Hebei urban agglomeration was the center of PM2.5 pollutions in China. The results of geographically weighted regression showed that: (1) in terms of natural factors, elevation had a negative correlation with the urban PM2.5 concentrations, while positive and negative correlations exist for other indexes, and negative correlation effect dominated, which is conducive to reducing PM2.5 concentrations in most cities. Thus it can be seen that the influence indexes of PM2.5 concentrations have significant spatial difference characteristics. From the mean contribution of the regression coefficient, the ranking of the influence intensity of natural indexes on PM2.5 concentrations were: digital elevation model, relative humidity, temperature, rainfall, wind speed, normalized difference vegetation index. (2) In terms of socio-economic factors, all the indicators showed positive and negative effects, with significant spatial heterogeneity. Among them, the build-up and GDP per capita were conducive to reducing PM2.5 concentrations in most cities, while population density, foreign direct investment, industrial structure and research and development expenditure can aggravate the air pollution in regions. The ranking of the influence intensity of socio-economic factors on PM2.5 concentrations were: population density, research and development expenditure, built-up, industrial structure, foreign direct investment, GDP per capita. (3) Due to the spatial heterogeneity of the influence of various factors on urban PM2.5 concentrations, the spatial difference of the influence of various indexes can be taken into account in the formulation of atmospheric governance countermeasures. Moreover, although natural factors have a more significant influence on PM2.5 concentrations, since it is difficult to change the natural conditions of cities artificially, specific strategies should be proposed from the perspective of social and economic factors in tackling haze. Keywords:air pollution;PM2.5 concentrations;geographically weighted regression model;spatial heterogeneity;China
PDF (29651KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 王少剑, 高爽, 陈静. 基于GWR模型的中国城市雾霾污染影响因素的空间异质性研究. 地理研究[J], 2020, 39(3): 651-668 doi:10.11821/dlyj020181389 WANG Shaojian. Spatial heterogeneity of driving factors of urban haze pollution in China based on GWR model. Geographical Research[J], 2020, 39(3): 651-668 doi:10.11821/dlyj020181389
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