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The Heavy Particulate Matter Pollution During the COVID-19 Lockdown Period in the Guanzhong Basin, China

文献类型：期刊论文

作者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
出版日期2022-04-27
卷号127期号:8页码:16
ISSN号2169-897X
关键词secondary aerosols atmospheric oxidizing capacity particulate matter pollution Guanzhong basin COVID-19
DOI10.1029/2021JD036191
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.
WOS关键词ORGANIC AEROSOL FORMATION ; MEXICO-CITY ; AIR-QUALITY ; ANTHROPOGENIC EMISSIONS ; MODELING SYSTEM ; WINTERTIME HAZE ; HONO SOURCES ; NUCLEATION ; GROWTH ; PHOTOCHEMISTRY
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB40030203] ; National Natural Science Foundation of China[41975175]
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
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
第四纪科学与全球变化卓越创新中心
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.

入库方式： OAI收割

来源：地球环境研究所

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