COVID-19 crisis reduces free tropospheric ozone across the northern hemisphere

Details

• Journal Title:
  Geophysical Research Letters
• Personal Author:
  Steinbrecht, Wolfgang ; Kubistin, Dagmar ; Plass‐Dülmer, Christian ; Davies, Jonathan ; Tarasick, David W. ; von der Gathen, Peter ; 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 ; Servais, Christian ; 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.
• NOAA Program & Office:
  OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory) ; GML (Global Monitoring Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)
• Description:
  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.
• Keywords:
  COVID-19 Pandemic, 2020- Emissins Ozone Troposphere
• Source:
  Geophysical Research Letters, 48, e2020GL091987
• DOI:
  https://doi.org/10.1029/2020GL091987
• Document Type:
  Journal Article
• Rights Information:
  CC BY
• Compliance:
  Submitted
• Main Document Checksum:
  urn:sha256:56546cadd5339a6031b52ae1f7792f1ad11fdb62e7f401adc172468db57e08cd
• Download URL:
  https://repository.library.noaa.gov/view/noaa/40174/noaa_40174_DS1.pdf
• File Type:
  [PDF - 542.96 KB ]