Article (Scientific journals)
COVID-19 Crisis Reduces Free Tropospheric Ozone Across the Northern Hemisphere
Steinbrecht, Wolfgang; Kubistin, Dagmar; Plass-Dülmer, Christian et al.
2021In Geophysical Research Letters, 48 (5), p. 2020GL091987
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Keywords :
COVID-19; emissions; ozone; troposphere
Abstract :
[en] Abstract Throughout spring and summer 2020, ozone stations in the northern extratropics recorded unusually low ozone in the free troposphere. From April to August, and from 1 to 8 kilometers altitude, ozone was on average 7% (≈4 nmol/mol) below the 2000–2020 climatological mean. Such low ozone, over several months, and at so many stations, has not been observed in any previous year since at least 2000. Atmospheric composition analyses from the Copernicus Atmosphere Monitoring Service and simulations from the NASA GMI model indicate that the large 2020 springtime ozone depletion in the Arctic stratosphere contributed less than one-quarter of the observed tropospheric anomaly. The observed anomaly is consistent with recent chemistry-climate model simulations, which assume emissions reductions similar to those caused by the COVID-19 crisis. COVID-19 related emissions reductions appear to be the major cause for the observed reduced free tropospheric ozone in 2020.
Research center :
Sphères - SPHERES
Disciplines :
Earth sciences & physical geography
Author, co-author :
Steinbrecht, Wolfgang
Kubistin, Dagmar
Plass-Dülmer, Christian
Davies, Jonathan
Tarasick, David W.
Gathen, Peter Von Der
Deckelmann, Holger
Jepsen, Nis
Kivi, Rigel
Lyall, Norrie
Palm, Matthias
Notholt, Justus
Kois, Bogumil
Oelsner, Peter
Allaart, Marc
Piters, Ankie
Gill, Michael
Van Malderen, Roeland
Delcloo, Andy W.
Sussmann, Ralf
Mahieu, Emmanuel  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Servais, Christian ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS)
Romanens, Gonzague
Stübi, Rene
Ancellet, Gerard
Godin-Beekmann, Sophie
Yamanouchi, Shoma
Strong, Kimberly
Johnson, Bryan
Cullis, Patrick
Petropavlovskikh, Irina
Hannigan, James W.
Hernandez, Jose-Luis
Diaz Rodriguez, Ana
Nakano, Tatsumi
Chouza, Fernando
Leblanc, Thierry
Torres, Carlos
Garcia, Omaira
Röhling, Amelie N.
Schneider, Matthias
Blumenstock, Thomas
Tully, Matt
Paton-Walsh, Clare
Jones, Nicholas
Querel, Richard
Strahan, Susan
Stauffer, Ryan M.
Thompson, Anne M.
Inness, Antje
Engelen, Richard
Chang, Kai-Lan
Cooper, Owen R.
More authors (43 more) Less
Language :
English
Title :
COVID-19 Crisis Reduces Free Tropospheric Ozone Across the Northern Hemisphere
Publication date :
February 2021
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
Wiley, Washington, United States - District of Columbia
Volume :
48
Issue :
5
Pages :
e2020GL091987
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 28 February 2021

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