Ozone anomalies in the free troposphere during the COVID-19 pandemic
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...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Zenodo
2021
|
Subjects: | |
Online Access: | https://doi.org/10.1029/2021GL094204 |
id |
ftzenodo:oai:zenodo.org:6353758 |
---|---|
record_format |
openpolar |
spelling |
ftzenodo:oai:zenodo.org:6353758 2024-09-09T19:24:48+00:00 Ozone anomalies in the free troposphere during the COVID-19 pandemic Bouarar, Idir Gaubert, Benjamin Brasseur, Guy Steinbrecht, Wolfgang Doumbia, Thierno Tilmes, Simone Yiming, Liu Stavrakou, Trissevgeni Deroubaix, Adrien Darras, Sabine Grainer, Claire Lacey, Forrest Müller, Jean-François Shi, Xiaoqin Elguindi, Nellie Wang, Tao 2021-08-16 https://doi.org/10.1029/2021GL094204 unknown Zenodo https://doi.org/10.1029/2021GL094204 https://zenodo.org/communities/aqwatch https://zenodo.org/communities/eu oai:zenodo.org:6353758 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode info:eu-repo/semantics/article 2021 ftzenodo https://doi.org/10.1029/2021GL094204 2024-07-27T07:14:39Z 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 5ppb below 400hPa, but reaches 8ppb at 250hPa. In the Southern Hemisphere, COVID-19 related ozone reductions by 4%–6% were masked by comparable ozone increases due to other changes in 2020. Article in Journal/Newspaper Arctic Zenodo Arctic Geophysical Research Letters 48 16 |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
description |
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 5ppb below 400hPa, but reaches 8ppb at 250hPa. In the Southern Hemisphere, COVID-19 related ozone reductions by 4%–6% were masked by comparable ozone increases due to other changes in 2020. |
format |
Article in Journal/Newspaper |
author |
Bouarar, Idir Gaubert, Benjamin Brasseur, Guy Steinbrecht, Wolfgang Doumbia, Thierno Tilmes, Simone Yiming, Liu Stavrakou, Trissevgeni Deroubaix, Adrien Darras, Sabine Grainer, Claire Lacey, Forrest Müller, Jean-François Shi, Xiaoqin Elguindi, Nellie Wang, Tao |
spellingShingle |
Bouarar, Idir Gaubert, Benjamin Brasseur, Guy Steinbrecht, Wolfgang Doumbia, Thierno Tilmes, Simone Yiming, Liu Stavrakou, Trissevgeni Deroubaix, Adrien Darras, Sabine Grainer, Claire Lacey, Forrest Müller, Jean-François Shi, Xiaoqin Elguindi, Nellie Wang, Tao Ozone anomalies in the free troposphere during the COVID-19 pandemic |
author_facet |
Bouarar, Idir Gaubert, Benjamin Brasseur, Guy Steinbrecht, Wolfgang Doumbia, Thierno Tilmes, Simone Yiming, Liu Stavrakou, Trissevgeni Deroubaix, Adrien Darras, Sabine Grainer, Claire Lacey, Forrest Müller, Jean-François Shi, Xiaoqin Elguindi, Nellie Wang, Tao |
author_sort |
Bouarar, Idir |
title |
Ozone anomalies in the free troposphere during the COVID-19 pandemic |
title_short |
Ozone anomalies in the free troposphere during the COVID-19 pandemic |
title_full |
Ozone anomalies in the free troposphere during the COVID-19 pandemic |
title_fullStr |
Ozone anomalies in the free troposphere during the COVID-19 pandemic |
title_full_unstemmed |
Ozone anomalies in the free troposphere during the COVID-19 pandemic |
title_sort |
ozone anomalies in the free troposphere during the covid-19 pandemic |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://doi.org/10.1029/2021GL094204 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://doi.org/10.1029/2021GL094204 https://zenodo.org/communities/aqwatch https://zenodo.org/communities/eu oai:zenodo.org:6353758 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.1029/2021GL094204 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
16 |
_version_ |
1809894643329925120 |