NASA Satellite Measurements Show Global-Scale Reductions in Free Tropospheric Ozone in 2020 and Again in 2021 During COVID-19

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dc.contributor.authorZiemke, Jerry R.
dc.contributor.authorKramarova, Natalya A.
dc.contributor.authorFrith, Stacey M.
dc.contributor.authorHuang, Liang-Kang
dc.contributor.authorHaffner, David P.
dc.contributor.authorWargan, Krzysztof
dc.contributor.authorLamsal, Lok
dc.contributor.authorLabow, Gordon J.
dc.contributor.authorMcPeters, Richard D.
dc.contributor.authorBhartia, Pawan K.
dc.date.accessioned2022-09-14T15:43:00Z
dc.date.available2022-09-14T15:43:00Z
dc.date.issued2022-08-12
dc.description.abstractNASA satellite measurements show that ozone reductions throughout the Northern Hemisphere (NH) free troposphere reported for spring-summer 2020 during the COronaVIrus Disease 2019 pandemic have occurred again in spring-summer 2021. The satellite measurements show that tropospheric column ozone (TCO) (mostly representative of the free troposphere) for 20°N–60°N during spring-summer for both 2020 and 2021 averaged ∼3 Dobson Units (DU) (or ∼7%–8%) below normal. These ozone reductions in 2020 and 2021 were the lowest in the 2005–2021 record. We also include satellite measurements of tropospheric NO2 that exhibit reductions of ∼10%–20% in the NH in early spring-to-summer 2020 and 2021, suggesting that reduced pollution was the main cause for the low anomalies in NH TCO in 2020 and 2021. Reductions of TCO ∼2 DU (7%) are also measured in the Southern Hemisphere in austral summer but are not associated with reduced NO2en_US
dc.description.sponsorshipWe thank the NASA Jet Propulsion Labo-ratory MLS team for the MLS v4.2 ozone data set, and the EPIC, OMPS, and OMI ozone processing teams. MERRA-2 is an official product of the Global Modeling and Assimilation Office at NASA GSFC. We also thank the NASA Center for Climate Simulation (NCCS) for providing high-performance computing resources. This research has been supported by the NASA programmatic fund “Long-term ozone trends” (project no. WBS 479717). Jerald R. Ziemke and Natalya A. Kramarova were also supported by the NASA ROSES proposal “Improving total and tropospheric ozone column products from EPIC on DSCOVR for studying regional scale ozone transport” (Grant Nos. 18-DSCOVR18-0011, DSCOVR Science Team). Gordon J. Labow, Stacey M. Frith, David P. Haffner and K. Wargan were supported under NASA contract NNG17HP01C.en_US
dc.description.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2022GL098712en_US
dc.format.extent8 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2bamf-gbij
dc.identifier.citationZiemke, J. R., Kramarova, N. A., Frith, S. M., Huang, L.-K., Haffner, D. P., Wargan, K., et al. (2022). NASA satellite measurements show global-scale reductions in free tropospheric ozone in 2020 and again in 2021 during COVID-19. Geophysical Research Letters, 49, e2022GL098712. https://doi.org/10.1029/2022GL098712en_US
dc.identifier.urihttps://doi.org/10.1029/2022GL098712
dc.identifier.urihttp://hdl.handle.net/11603/25661
dc.language.isoen_USen_US
dc.publisherAGUen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC GESTAR II Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleNASA Satellite Measurements Show Global-Scale Reductions in Free Tropospheric Ozone in 2020 and Again in 2021 During COVID-19en_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0003-1848-486Xen_US

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