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
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Indexed By | |
SUSTech Authorship | First
; Corresponding
|
Scopus EID | 2-s2.0-85101539911
|
Data Source | Scopus
|
Corresponding Author | Zhu,Lei |
WOS Accession No | WOS:000623802900039
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EI Accession Number | 20210909992498
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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 Type | Other |
Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/406297 |
Department | School 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 Affilication | School of Environmental Science and Engineering |
Corresponding Author Affilication | School 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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