The Heavy Particulate Matter Pollution During the COVID-19 Lockdown Period in the Guanzhong Basin, China | |
Li, Xia3,4; Bei, Naifang2; Wu, Jiarui4; Liu, Suixin4; Wang, Qiyuan4; Tian, Jie4; Liu, Lang4; Wang, Ruonan3,4; Li, Guohui1,4 | |
刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
2022-04-27 | |
卷号 | 127期号:8页码:16 |
关键词 | secondary aerosols atmospheric oxidizing capacity particulate matter pollution Guanzhong basin COVID-19 |
ISSN号 | 2169-897X |
DOI | 10.1029/2021JD036191 |
通讯作者 | Li, Guohui(ligh@ieecas.cn) |
英文摘要 | Nationwide restrictions on human activities (lockdown) in China since 23 January 2020, to control the 2019 novel coronavirus disease pandemic (COVID-19), has provided an opportunity to evaluate the effect of emission mitigation on particulate matter (PM) pollution. The WRF-Chem simulations of persistent heavy PM pollution episodes from 20 January to 14 February 2020, in the Guanzhong Basin (GZB), northwest China, reveal that large-scale emission reduction of primary pollutants has not substantially improved the air quality during the COVID-19 lockdown period. Simultaneous reduction of primary precursors during the lockdown period only decreases the near-surface PM2.5 mass concentration by 11.6% (12.6 mu g m(-3)), but increases ozone (O-3) concentration by 9.2% (5.5 mu g m(-3)) in the GZB. The primary organic aerosol and nitrate are the major contributor to the decreased PM2.5 in the GZB, with the reduction of 28.0% and 21.8%, respectively, followed by EC (10.1%) and ammonium (7.2%). The increased atmospheric oxidizing capacity by the O-3 enhancement facilitates the secondary aerosol (SA) formation in the GZB, increasing secondary organic aerosol and sulphate by 6.5% and 3.3%, respectively. Furthermore, sensitivity experiments suggest that combined emission reduction of NOX and VOCs following the ratio of 1:1 is conducive to lowering the wintertime SA and O-3 concentration and further alleviating the PM pollution in the GZB. |
资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB40030203] ; National Natural Science Foundation of China[41975175] |
WOS关键词 | ORGANIC AEROSOL FORMATION ; MEXICO-CITY ; AIR-QUALITY ; ANTHROPOGENIC EMISSIONS ; MODELING SYSTEM ; WINTERTIME HAZE ; HONO SOURCES ; NUCLEATION ; GROWTH ; PHOTOCHEMISTRY |
WOS研究方向 | Meteorology & Atmospheric Sciences |
语种 | 英语 |
出版者 | AMER GEOPHYSICAL UNION |
WOS记录号 | WOS:000786297200001 |
资助机构 | Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.ieecas.cn/handle/361006/17698] |
专题 | 地球环境研究所_粉尘与环境研究室 |
通讯作者 | Li, Guohui |
作者单位 | 1.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 2.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, SKLLQG Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Xia,Bei, Naifang,Wu, Jiarui,et al. The Heavy Particulate Matter Pollution During the COVID-19 Lockdown Period in the Guanzhong Basin, China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2022,127(8):16. |
APA | Li, Xia.,Bei, Naifang.,Wu, Jiarui.,Liu, Suixin.,Wang, Qiyuan.,...&Li, Guohui.(2022).The Heavy Particulate Matter Pollution During the COVID-19 Lockdown Period in the Guanzhong Basin, China.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,127(8),16. |
MLA | Li, Xia,et al."The Heavy Particulate Matter Pollution During the COVID-19 Lockdown Period in the Guanzhong Basin, China".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 127.8(2022):16. |
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