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Title

Global Significant Changes in Formaldehyde (HCHO) Columns Observed From Space at the Early Stage of the COVID-19 Pandemic

Author
Publication Years
2021-02-28
Keywords
Language
English
URL[Source Record]
Abstract
Satellite HCHO data are widely used as a reliable proxy of non-methane volatile organic compounds (NMVOCs) to constrain underlying emissions and chemistry. Here, we examine global significant changes in HCHO columns at the early stage of the COVID-19 pandemic (January–April 2020) compared with the same period in 2019 with observations from the TROPOspheric Monitoring Instrument (TROPOMI). HCHO columns decline (11.0%) in the Northern China Plain (NCP) because of a combination of meteorological impacts, lower HCHO yields as NO emission plunges (by 36.0%), and reduced NMVOC emissions (by 15.0%) resulting from the lockdown. HCHO columns change near Beijing (+8.4%) due mainly to elevated hydroxyl radical as NO emission decreases in a NO-saturated regime. HCHO columns change in Australia (+17.5%), Northeastern Myanmar of Southeast Asia (+14.9%), Central Africa (+7.8%), and Central America (+18.9%), consistent with fire activities. Our work also points to other changes related to temperature and meteorological variations.
DOI
Source Title
Volume
48
Issue
4
ISSN
0094-8276
Indexed By
SCI ; EI
SUSTech Authorship
First ; Corresponding
Scopus EID
2-s2.0-85101539911
Data Source
Scopus
Corresponding AuthorZhu,Lei
WOS Accession No
WOS:000623802900039
EI Accession Number
20210909992498
EI Keywords
Volatile organic compounds
ESI Classification Code
Organic Compounds:804.1 ; Inorganic Compounds:804.2
EISSN
1944-8007
Important Publications
NI Journal Papers
ESI Research Field
GEOSCIENCES
Citation statistics
Cited Times [WOS]:21
Document TypeOther
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/406297
DepartmentSchool of Environmental Science and Engineering
Affiliation
1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,China
2.Division of Atmospheric Composition,Royal Belgian Institute for Space Aeronomy (BIRA-IASB),Brussels,Belgium
3.Department of Environmental Science and Engineering,Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention,Fudan University,Shanghai,China
First Author AffilicationSchool of Environmental Science and Engineering
Corresponding Author AffilicationSchool of Environmental Science and Engineering
Recommended Citation
GB/T 7714
Sun,Wenfu,Zhu,Lei,De Smedt,Isabelle,et al. Global Significant Changes in Formaldehyde (HCHO) Columns Observed From Space at the Early Stage of the COVID-19 Pandemic. 2021-02-28.
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