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COVID-19 Crisis Reduces Free Tropospheric Ozone across the Northern Hemisphere

Dagmar Kubistin 1 Christian Plass-Dülmer 1 David Tarasick 2 Peter von der Gathen 3 Holger Deckelmann 3 Nis Jepsen 4 Norrie Lyall 5 Peter Oelsner 1 Marc Allaart 6 Ralf Sussmann 7 Gonzague Romanens 8 Rene Stübi 8 Sophie Godin-Beekmann 9 Shoma Yamanouchi 10 Bryan Johnson 11 Patrick Cullis 11, 12 Amelie Röhling 13 Matthias Schneider 13 Thomas Blumenstock 13 Clare Paton-Walsh 14 Nicholas Jones 14 Susan Strahan 15 Ryan Stauffer 16, 15 Anne Thompson 15 Wolfgang Steinbrecht 1 Dagmar Kubis Christian Plasdülme Jonathan Davies 2 Da Tarasick Peter V Der Gathen Holger Deckelma Nis Jeps Rigel Kivi 17 Nor Lyall Matthias Palm 18 Justus Notholt 18 Bogumil Kois 19 Pe Oelsner Marc Alla Ankie Piters 6 Michael Gill 20 Roeland van Malderen 21 Andy Delcloo 21 Ralf Sussma Emmanuel Mahieu 22 Christian Servais 22 Gonzag Romanens Rene Stü Gérard Ancellet 23 Soph Godin-Beekma Shoma Yamanouc Kimberly Strong 10 Brya Johnso Patrick Cul Irina Petropavlovskikh 12, 11 James Hannigan 24 Jose-Luis Hernandez 25 Ana Diaz Rodriguez 25 Tatsumi Nakano 26 Fernando Chouza 27 Thierry Leblanc 27 Carlos Torres 25 Omaira Garcia 25 Amel Röhling Matth Schneider Thomas Blumensto Matt Tully 28 Clar Paton-Walsh Nichola Jones Richard Querel 29 Susan Straha Ryan Stauf Anne Thomps Antje Inness 30 Richard Engelen 30 Kai-Lan Chang 31, 12 Owen Cooper 31, 12
9 STRATO - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
23 TROPO - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
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 to 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.
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Submitted on : Saturday, February 27, 2021 - 8:41:43 PM
Last modification on : Tuesday, March 2, 2021 - 3:48:02 PM

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Dagmar Kubistin, Christian Plass-Dülmer, David Tarasick, Peter von der Gathen, Holger Deckelmann, et al.. COVID-19 Crisis Reduces Free Tropospheric Ozone across the Northern Hemisphere. Geophysical Research Letters, American Geophysical Union, 2021, 48 (5), pp.e2020GL091987. ⟨10.1029/2020GL091987⟩. ⟨insu-03137114v2⟩

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