Abrupt decline in tropospheric nitrogen dioxide over China after the outbreak of COVID-19
Open accessAbstract
China's policy interventions to reduce the spread of the coronavirus disease 2019 have environmental and economic impacts. Tropospheric nitrogen dioxide indicates economic activities, as nitrogen dioxide is primarily emitted from fossil fuel consumption. Satellite measurements show a 48% drop in tropospheric nitrogen dioxide vertical column densities from the 20 days averaged before the 2020 Lunar New Year to the 20 days averaged after. This decline is 21 ± 5% larger than that from 2015 to 2019. We relate this reduction to two of the government's actions: the announcement of the first report in each province and the date of a province's lockdown. Both actions are associated with nearly the same magnitude of reductions. Our analysis offers insights into the unintended environmental and economic consequences through reduced economic activities.
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NO2 is produced by fossil energy combustion, has a photochemical lifetime of only a few hours, and can effectively track emission source.
“NO2, as the gas produced by fossil energy combustion, the photochemical lifetime of which is only a few hours, can effectively track the emission source.341,342”
From Technologies and perspectives for achieving carbon neutrality (2021) · cites this paper as [341]
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- Authors
- Liu, F., Page, A., Strode, S. A., Yoshida, Y., Choi, S., Zheng, B., Lamsal, L. N., Li, C., Krotkov, N. A., Eskes, H., van der A, R., Veefkind, P., Levelt, P. F., Hauser, O. P., & Joiner, J.
- Affiliations
- Goddard Space Flight Center (US)
- University of Exeter (GB)
- Centre National de la Recherche Scientifique (FR)
- Royal Netherlands Meteorological Institute (NL)
- Royal Netherlands Meteorological Institute (KNMI), De Bilt 3731 GA, The Netherlands.
- Corresponding author
- Liu, Fei
- Hauser, Oliver P.
- Joiner, Joanna
- ORCID
- Venue
- Science Advances
- Published
- 2020-07-10
- Volume
- 6
- Issue
- 28
- Pages
- eabc2992-eabc2992
- ISSN
- 2375-2548 (ISSN-L)
- PMC
- PMC7455481
- OpenAlex
- W3034305671
- Cited by
- 348
- References
- 25
- Citations by year
- 2026: 8 · 2025: 17 · 2024: 30 · 2023: 46 · 2022: 77 · 2021: 131 · 2020: 39
- FWCI
- 27.23
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Science Advances (publishedVersion, cc-by-nc)
- PubMed Central (publishedVersion, cc-by-nc)
- PubMed (publishedVersion)
- HAL (submittedVersion, other-oa)
- Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
- Figshare (submittedVersion, cc-by-nc)
- Open Research Exeter (University of Exeter) (submittedVersion, cc-by-nc)
- Research Repository (Delft University of Technology) (submittedVersion, cc-by-nc)
- Funders
- National Aeronautics and Space Administration (80NSSC19K0980)
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › COVID-19 impact on air quality
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
- Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric aerosols and clouds
- Keywords
- tropospheric nitrogen dioxide, COVID-19 lockdown, economic activity, fossil fuel emissions, satellite remote sensing, vertical column density, China, policy interventions, environmental impact of economic activity
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