| Analysis of air quality characteristics of Beijing–Tianjin–Hebei and its surrounding air pollution transport channel cities in China |
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| 基金项目： | We would also like to thank anonymous reviewers for their valuable comments,which helped to improve this article;This study was supported by the Humanities and Social Sciences Project Youth Fund of Ministry of Education in China |
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| 摘 要： | Beijing–Tianjin–Hebei(BTH) and its surrounding areas are very important to air pollution control in China.To analyze the characteristics of BTH and its surrounding areas of China,we collected 5,641,440 air quality data from 161 air monitoring stations and 37,123,000 continuous monitoring data from air polluting enterprises in BTH and surrounding cities to establish an indicator system for urban air quality portraits.The results showed that particulate matter with aerodynamic diameters of 2.5 μm(PM_(2.5)),particulate matter with aerodynamic diameters of 10 μm(PM_(10)) and SO_2 improved significantly in 31 cities from2015 to 2018,but ozone deteriorated.Air quality in BTH and the surrounding areas showed obvious seasonal characteristics,among which PM_(2.5),PM_(10),SO_2,and NO_2 showed a "U" type distribution from January to December,while O_3 had an "inverted U" distribution.The hourly changes in air quality revealed that peaks of PM_(2.5),PM_(10) and NO_2 appeared from 8:00 to 10:00,while those for O_3 appeared at 15:00–16:00.The exposure characteristics of the 31 cities showed that six districts in Beijing had the highest air quality population exposure,and that exposure levels in Zhengzhou,Puyang,Anyang,Jincheng were higher than the average of the 31 investigated cities.Additionally,multiple linear regression revealed a negative correlation between meteorological factors(especially wind and precipitation) and air quality,while a positive correlation existed between industrial pollution emissions and air quality in most of BTH and its surrounding cities.
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| 关 键 词： | Corresponding author. Beijing–Tianjin–Hebei Air quality population exposure Seasonal index Hourly change Industrial pollution source emission Meteorology factors |
| 收稿时间： | 2019/2/3 0:00:00 |
Analysis of air quality characteristics of Beijing-Tianjin-Hebei and its surrounding air pollution transport channel cities in China |
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| Authors: | Cuicui Xiao Miao Chang Peikun Guo Meifeng Gu Yang Li |
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| Institution: | School of Environment, Tsinghua University, Beijing 100084, China;School of Environment, Tsinghua University, Beijing 100084, China;School of Environment, Tsinghua University, Beijing 100084, China;School of Environment, Tsinghua University, Beijing 100084, China;School of Environment, Tsinghua University, Beijing 100084, China |
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