CaltechAUTHORS
  A Caltech Library Service

The Role of Primary Emission and Transboundary Transport in the Air Quality Changes During and After the COVID‐19 Lockdown in China

Fan, Hao and Wang, Yuan and Zhao, Chuanfeng and Yang, Yikun and Yang, Xingchuan and Sun, Yue and Jiang, Shuyi (2021) The Role of Primary Emission and Transboundary Transport in the Air Quality Changes During and After the COVID‐19 Lockdown in China. Geophysical Research Letters, 48 (7). Art. No. e2020GL091065. ISSN 0094-8276. doi:10.1029/2020gl091065. https://resolver.caltech.edu/CaltechAUTHORS:20210430-124915477

[img] MS Word - Supplemental Material
See Usage Policy.

7MB

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20210430-124915477

Abstract

In late January 2020, China’s rapid and strict control measures to curb the COVID‐19 spread led to a sharp halt in socio‐economic activity and a significant reduction in emissions. Using the ground‐based observational data, the authors synergistically quantify the nation‐wide variations of major air pollutant as well as meteorology during and after the lockdown. Their concentrations (except O₃) exhibited significant reduction during February and March 2020, by more than 24% during the lockdown compared with the earlier time period and by more than 17% compared with that in the same period in 2019. In contrast, ozone increased rapidly by about 60% across the country during the lockdown. Abnormal increases in carbon monoxide and particulate matter concentrations in southwest China are attributed to the severe wildfires in Southeast Asia. The concentration of air pollutants bounced back rapidly after the full‐scale reopen in March 2020, indicating the decisive role of emissions in the pollution formation.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1029/2020gl091065DOIArticle
https://zenodo.org/record/4074307Related ItemData
ORCID:
AuthorORCID
Fan, Hao0000-0002-6947-9609
Wang, Yuan0000-0001-6657-8401
Zhao, Chuanfeng0000-0002-5196-3996
Yang, Yikun0000-0001-7427-6876
Additional Information:© 2021. American Geophysical Union. Issue Online: 09 April 2021; Version of Record online: 09 April 2021; Accepted manuscript online: 27 March 2021; Manuscript accepted: 15 March 2021; Manuscript revised: 11 March 2021; Manuscript received: 09 October 2020. This work was supported by the National Natural Science Foundation of China (Grants 41925022, 91837204), the State Key Laboratory of Earth Surface Processes and Resource Ecology, and the Fundamental Research Funds for the Central Universities. Data Availability Statement: The air pollutant observation data and reanalysis data used in this article can be obtained from https://zenodo.org/record/4074307.
Group:COVID-19
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China41925022
National Natural Science Foundation of China91837204
State Key Laboratory of Earth Surface Processes and Resource EcologyUNSPECIFIED
Fundamental Research Funds for the Central UniversitiesUNSPECIFIED
Subject Keywords:air pollutants; China; COVID‐19; emission; lockdown
Issue or Number:7
DOI:10.1029/2020gl091065
Record Number:CaltechAUTHORS:20210430-124915477
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210430-124915477
Official Citation:Fan, H., Wang, Y., Zhao, C., Yang, Y., Yang, X., Sun, Y., & Jiang, S. (2021). The role of primary emission and transboundary transport in the air quality changes during and after the COVID‐19 lockdown in China. Geophysical Research Letters, 48, e2020GL091065. https://doi.org/10.1029/2020GL091065
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108905
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:30 Apr 2021 20:01
Last Modified:30 Apr 2021 20:01

Repository Staff Only: item control page