Black Carbon Emission Reduction Due to COVID-19 Lockdown in China.
BC emission
COVID‐19
eastern China
inverse modeling
northern China
stagnant conditions
Journal
Geophysical research letters
ISSN: 0094-8276
Titre abrégé: Geophys Res Lett
Pays: United States
ID NLM: 9882887
Informations de publication
Date de publication:
28 Apr 2021
28 Apr 2021
Historique:
received:
04
03
2021
accepted:
22
03
2021
entrez:
7
7
2021
pubmed:
8
7
2021
medline:
8
7
2021
Statut:
ppublish
Résumé
During the Lunar New Year Holiday of 2020, China implemented an unprecedented lockdown to fight the COVID-19 outbreak, which strongly affected the anthropogenic emissions. We utilized elemental carbon observations (equivalent to black carbon, BC) from 42 sites and performed inverse modeling to determine the impact of the lockdown on the weekly BC emissions and quantify the effect of the stagnant conditions on BC observations in densely populated eastern and northern China. BC emissions declined 70% (eastern China) and 48% (northern China) compared to the first half of January. In northern China, under the stagnant conditions of the first week of the lockdown, the observed BC concentrations rose unexpectedly (29%) even though the BC emissions fell. The emissions declined substantially thereafter until a week after the lockdown ended. On the contrary, in eastern China, BC emissions dropped sharply in the first week and recovered synchronously with the end of the lockdown.
Identifiants
pubmed: 34230717
doi: 10.1029/2021GL093243
pii: GRL62202
pmc: PMC8250075
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e2021GL093243Informations de copyright
© 2021. American Geophysical Union. All Rights Reserved.
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