Open AccessCharacteristics of heavy air pollution in Beijing-Tianjin-Hebei and the surrounding areas during autumn and winter and policy recommendations
Author(s) -
Qian Tang,
Yu Lei,
Gang Yan,
Wenhao Xue,
Xuying Wang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/569/1/012041
Subject(s) - environmental science , pollution , beijing , air quality index , air pollution , china , environmental protection , meteorology , geography , ecology , chemistry , archaeology , organic chemistry , biology
Beijing-Tianjin-Hebei and its surrounding areas is the most polluted region in China. Autumn and winter are the most heavily polluted seasons. It is essential to reduce the PM 2.5 pollution in autumn and winter in this region for winning the blue sky defense war. The characteristics of PM 2.5 pollution during autumn and winter in this region were analysed and crucial issues in atmospheric pollution prevention were identified from the perspectives of time, space and pollution sources, using a combination of techniques including air quality observation, emission inventory, PM 2.5 source apportionment and air quality model simulation. The results showed that average PM 2.5 concentrations in autumn and winter were twice that in spring and summer, and frequent heavy pollution elevated PM 2.5 concentration significantly. Six cities including Handan, Xingtai, Shijiazhuang, Xinxiang, Anyang and Baoding, located along the south-western transport channel in the region, have great effects on regional air quality. The severe PM 2.5 pollution in this region could be attributed to heavy industrial structure, large NOx emissions from mobile sources, re-burn of loose coal, insufficient dust control and impacts from cities out of the region. Suggestions for air pollution control in autumn and winter in this region were proposed. More efforts should be devoted to the most vulnerable links in the key cities.