Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091611 |
Chemistry of Atmospheric Fine Particles during the COVID‐19 Pandemic in a Megacity of Eastern China | |
Lei Liu; Jian Zhang; Rongguang Du; Xiaomi Teng; Rui Hu; Qi Yuan; Shanshan Tang; Chuanhua Ren; Xin Huang; Liang Xu; Yinxiao Zhang; Xiaoye Zhang; Congbo Song; Bowen Liu; Gongda Lu; Zongbo Shi; Weijun Li | |
2020-12-17 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | Air pollution in megacities represents one of the greatest environmental challenges. Our observed results show that the dramatic NOx decrease (77%) led to significant O3 increases (a factor of two) during the COVID‐19 lockdown in megacity Hangzhou, China. Model simulations further demonstrate the large increase of daytime OH and HO2 radicals and nighttime NO3 radical, which can promote the gas‐phase reaction and nocturnal multiphase chemistry. Therefore, enhanced NO3– and SO42– formation was observed during the COVID‐19 lockdown because of the enhanced oxidizing capacity. The PM2.5 decrease was only partially offset by enhanced aerosol formation with its reduction reaching 50%. In particular, NO3− decreased largely by 68%. PM2.5 chemical analysis reveals that vehicular emissions mainly contributed to PM2.5 under normal conditions in Hangzhou. Whereas, stationary sources dominated the residual PM2.5 during the COVID‐19 lockdown. This study provides evidence that large reductions in vehicular emissions can effectively mitigate air pollution in megacities. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/308122 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Lei Liu,Jian Zhang,Rongguang Du,等. Chemistry of Atmospheric Fine Particles during the COVID‐19 Pandemic in a Megacity of Eastern China[J]. Geophysical Research Letters,2020. |
APA | Lei Liu.,Jian Zhang.,Rongguang Du.,Xiaomi Teng.,Rui Hu.,...&Weijun Li.(2020).Chemistry of Atmospheric Fine Particles during the COVID‐19 Pandemic in a Megacity of Eastern China.Geophysical Research Letters. |
MLA | Lei Liu,et al."Chemistry of Atmospheric Fine Particles during the COVID‐19 Pandemic in a Megacity of Eastern China".Geophysical Research Letters (2020). |
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