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

  • Wolfgang Steinbrecht
  • , Dagmar Kubistin
  • , Christian Plass-Dülmer
  • , Jonathan Davies
  • , David W. Tarasick
  • , Peter Von Der Gathen
  • , Holger Deckelmann
  • , Nis Jepsen
  • , Rigel Kivi
  • , Norrie Lyall
  • , Matthias Palm
  • , Justus Notholt
  • , Bogumil Kois
  • , Peter Oelsner
  • , Marc Allaart
  • , Ankie Piters
  • , Michael Gill
  • , Roeland Van Malderen
  • , Andy W. Delcloo
  • , Ralf Sussmann
  • Emmanuel Mahieu, Christian Servais, Gonzague Romanens, Rene Stübi, Gerard Ancellet, Sophie Godin-Beekmann, Shoma Yamanouchi, Kimberly Strong, Bryan Johnson, Patrick Cullis, Irina Petropavlovskikh, James W. Hannigan, Jose Luis Hernandez, Ana Diaz Rodriguez, Tatsumi Nakano, Fernando Chouza, Thierry Leblanc, Carlos Torres, Omaira Garcia, Amelie N. Röhling, Matthias Schneider, Thomas Blumenstock, Matt Tully, Clare Paton-Walsh, Nicholas Jones, Richard Querel, Susan Strahan, Ryan M. Stauffer, Anne M. Thompson, Antje Inness, Richard Engelen, Kai Lan Chang, Owen R. Cooper
  • Deutscher Wetterdienst
  • Université Laval and Environment and Climate Change Canada
  • Alfred Wegener Institute - Helmholtz Centre for Polar and Marine Research
  • Danish Meteorological Institute
  • Finnish Meteorological Institute
  • British Meteorological Service
  • University of Bremen
  • Ministry of the Environment, Poland
  • Royal Netherlands Meteorological Institute
  • Irish Meteorological Service
  • Royal Meteorological Institute of Belgium
  • Karlsruhe Institute of Technology
  • University of Liege
  • Now at Federal Office of Meteorology and Climatology MeteoSwiss
  • Sorbonne Université
  • University of Toronto
  • National Oceanic and Atmospheric Administration
  • University of Colorado Boulder
  • National Center for Atmospheric Research
  • State Meteorological Agency (AEMET)
  • Japan Meteorological Agency
  • Jet Propulsion Laboratory, California Institute of Technology
  • AEMET
  • Bureau of Meteorology Australia
  • University of Wollongong
  • NIWA
  • NASA Goddard Space Flight Center
  • Universities Space Research Association
  • University of Maryland, College Park
  • European Centre for Medium-Range Weather Forecasts

Research output: Contribution to journalArticlepeer-review

79 Scopus citations

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.

Original languageEnglish
Article numbere2020GL091987
JournalGeophysical Research Letters
Volume48
Issue number5
DOIs
StatePublished - Mar 16 2021
Externally publishedYes

Keywords

  • COVID-19
  • emissions
  • ozone
  • troposphere

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