10.1029/2021GL094204
https://zenodo.org/records/6353758
oai:zenodo.org:6353758
Bouarar, Idir
Idir
Bouarar
Environmental Modeling Group, Max Planck Institute for Meteorology, Hamburg, Germany
Gaubert, Benjamin
Benjamin
Gaubert
Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
Brasseur, Guy
Guy
Brasseur
Environmental Modeling Group, Max Planck Institute for Meteorology, Hamburg, Germany
Steinbrecht, Wolfgang
Wolfgang
Steinbrecht
Deutscher Wetterdienst, Hohenpeißenberg, Germany
Doumbia, Thierno
Thierno
Doumbia
Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, Toulouse, France
Tilmes, Simone
Simone
Tilmes
Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
Yiming, Liu
Liu
Yiming
School of Atmospheric Science, Sun Yat-sen University, Guangzhou, China
Stavrakou, Trissevgeni
Trissevgeni
Stavrakou
Royal Belgian Institute for Space Aeronomy, Brussels, Belgium
Deroubaix, Adrien
Adrien
Deroubaix
Environmental Modeling Group, Max Planck Institute for Meteorology, Hamburg, Germany
Darras, Sabine
Sabine
Darras
Observatoire, Midi-Pyrénées, Toulouse, France
Grainer, Claire
Claire
Grainer
Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, Toulouse, France
Lacey, Forrest
Forrest
Lacey
Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
Müller, Jean-François
Jean-François
Müller
Royal Belgian Institute for Space Aeronomy, Brussels, Belgium
Shi, Xiaoqin
Xiaoqin
Shi
Environmental Modeling Group, Max Planck Institute for Meteorology, Hamburg, Germany
Elguindi, Nellie
Nellie
Elguindi
Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, Toulouse, France
Wang, Tao
Tao
Wang
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
Ozone anomalies in the free troposphere during the COVID-19 pandemic
Zenodo
2021
2021-08-16
10.1029/2021GL094204
https://zenodo.org/communities/aqwatch
https://zenodo.org/communities/eu
Creative Commons Attribution 4.0 International
Abstract
Using the CAM-chem Model, we simulate the response of chemical species in the free troposphere to scenarios of primary pollutant emission reductions during the COVID-19 pandemic. Zonally averaged ozone in the free troposphere during Northern Hemisphere spring and summer is found to be 5%–15% lower than 19-yr climatological values, in good agreement with observations. About one third of this anomaly is attributed to the reduction scenario of air traffic during the pandemic, another third to the reduction scenario of surface emissions, the remainder to 2020 meteorological conditions, including the exceptional springtime Arctic stratospheric ozone depletion. For the combined emission reductions, the overall COVID-19 reduction in northern hemisphere tropospheric ozone in June is less than 5 ppb below 400 hPa, but reaches 8 ppb at 250 hPa. In the Southern Hemisphere, COVID-19 related ozone reductions by 4%–6% were masked by comparable ozone increases due to other changes in 2020.
European Commission
10.13039/501100000780
870301
Air Quality: Worldwide Analysis and Forecasting of Atmospheric Composition for Health