Limited Regional Aerosol and Cloud Microphysical Changes Despite Unprecedented Decline in Nitrogen Oxide Pollution During the February 2020 COVID-19 Shutdown in China

doi:10.1029/2020GL088913

	Limited Regional Aerosol and Cloud Microphysical Changes Despite Unprecedented Decline in Nitrogen Oxide Pollution During the February 2020 COVID-19 Shutdown in China
	Diamond, Michael S.; Wood, Robert
	2020-09
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
摘要	Following the emergence of a novel coronavirus in Wuhan, China instituted shutdown measures starting in late January and continuing into February 2020 to arrest the spread of disease. This resulted in a sharp economic contraction unparalleled in recent Chinese history. Satellite retrievals show that nitrogen dioxide pollution declined by an unprecedented amount (similar to 50% regionally) from its expected unperturbed value, but regional-scale column aerosol loadings and cloud microphysical properties were not detectably affected. The disparate impact is tied to differential economic impacts of the shutdown, in which transportation, a disproportionate source of nitrogen oxide emissions, underwent drastic declines (similar to 90% reductions in passenger traffic), whereas industry and power generation, responsible for >90% of particulate emissions, were relatively less affected (similar to 20% reductions in electricity and thermal power generation). A combination of anomalously warm and humid meteorological conditions and complex chemical interactions further decreased nitrogen dioxide concentrations but likely enhanced secondary aerosol formation.
DOI	10.1029/2020GL088913
WOS关键词	ANTHROPOGENIC EMISSIONS ; SECONDARY AEROSOL ; TRENDS ; CLIMATE ; IMPACT ; PM2.5 ; WATER ; HAZE
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
出版者	AMER GEOPHYSICAL UNION
引用统计
文献类型	期刊论文
专题	新冠肺炎循证社会科学证据集成
作者单位	Univ Washington
推荐引用方式 GB/T 7714	Diamond, Michael S.,Wood, Robert. Limited Regional Aerosol and Cloud Microphysical Changes Despite Unprecedented Decline in Nitrogen Oxide Pollution During the February 2020 COVID-19 Shutdown in China[J]. GEOPHYSICAL RESEARCH LETTERS,2020.
APA	Diamond, Michael S.,&Wood, Robert.(2020).Limited Regional Aerosol and Cloud Microphysical Changes Despite Unprecedented Decline in Nitrogen Oxide Pollution During the February 2020 COVID-19 Shutdown in China.GEOPHYSICAL RESEARCH LETTERS.
MLA	Diamond, Michael S.,et al."Limited Regional Aerosol and Cloud Microphysical Changes Despite Unprecedented Decline in Nitrogen Oxide Pollution During the February 2020 COVID-19 Shutdown in China".GEOPHYSICAL RESEARCH LETTERS (2020).

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