Analyzing ozone variations and uncertainties at high latitudes during sudden stratospheric warming events using MERRA-2

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dc.contributor.authorShams, Shima Bahramvash
dc.contributor.authorWalden, Von P.
dc.contributor.authorHannigan, James W.
dc.contributor.authorRandel, William J.
dc.contributor.authorPetropavlovskikh, Irina V.
dc.contributor.authorButler, Amy H.
dc.contributor.authorDe La Cámara Illescas, Álvaro
dc.date.accessioned2024-10-02T09:36:19Z
dc.date.available2024-10-02T09:36:19Z
dc.date.issued2022-04-25
dc.description.abstractStratospheric circulation is a critical part of the Arctic ozone cycle. Sudden stratospheric warming events (SSWs) manifest the strongest alteration of stratospheric dynamics. During SSWs, changes in planetary wave propagation vigorously influence zonal mean zonal wind, temperature, and tracer concentrations in the stratosphere over the high latitudes. In this study, we examine six persistent major SSWs from 2004 to 2020 using the Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2). Using the unique density of observations around the Greenland sector at high latitudes, we perform comprehensive comparisons of high-latitude observations with the MERRA-2 ozone dataset during the six major SSWs. Our results show that MERRA-2 captures the high variability of mid-stratospheric ozone fluctuations during SSWs over high latitudes. However, larger uncertainties are observed in the lower stratosphere and troposphere. The zonally averaged stratospheric ozone shows a dramatic increase of 9 %-29 % in total column ozone (TCO) near the time of each SSW, which lasts up to 2 months. This study shows that the average shape of the Arctic polar vortex before SSWs influences the geographical extent, timing, and magnitude of ozone changes. The SSWs exhibit a more significant impact on ozone over high northern latitudes when the average polar vortex is mostly elongated as seen in 2009 and 2018 compared to the events in which the polar vortex is displaced towards Europe. Strong correlation (R^(2) = 90 %) is observed between the magnitude of change in average equivalent potential voracity before and after SSWs and the associated averaged total column ozone changes over high latitudes. This paper investigates the different terms of the ozone continuity equation using MERRA-2 circulation, which emphasizes the key role of vertical advection in mid-stratospheric ozone during the SSWs and the magnified vertical advection in elongated vortex shape as seen in 2009 and 2018.
dc.description.abstractShort summary. Large-scale atmospheric circulation has a strong influence on ozone in the Arctic, and certain anomalous dynamical events, such as sudden stratospheric warmings, cause dramatic alterations of the large-scale circulation. A reanalysis model is evaluated and then used to investigate the impact of sudden stratospheric warmings on mid-atmospheric ozone. Results show that the position of the cold jet stream over the Arctic before these events influences the variability of ozone.
dc.description.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.fundingtypePagado por el autor
dc.description.refereedTRUE
dc.description.sponsorshipNational Science Foundation
dc.description.statuspub
dc.identifier.citationBahramvash Shams, S., Walden, V. P., Hannigan, J. W., Randel, W. J., Petropavlovskikh, I. V., Butler, A. H., and de la Cámara, A.: Analyzing ozone variations and uncertainties at high latitudes during sudden stratospheric warming events using MERRA-2, Atmos. Chem. Phys., 22, 5435–5458, https://doi.org/10.5194/acp-22-5435-2022, 2022.
dc.identifier.doi10.5194/acp-22-5435-2022
dc.identifier.essn1680-7324
dc.identifier.issn1680-7316
dc.identifier.officialurlhttps://doi.org/10.5194/acp-22-5435-2022
dc.identifier.relatedurlhttps://acp.copernicus.org/articles/22/5435/2022/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/108515
dc.issue.number8
dc.journal.titleAtmospheric Chemistry and Physics
dc.language.isoeng
dc.page.final5458
dc.page.initial5435
dc.publisherEuropean Geosciences Unioin
dc.relation.projectIDPLR-1420932
dc.relation.projectIDPLR-1414314
dc.rightsAttribution 4.0 Internationalen
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject.cdu551.51
dc.subject.keywordVertical-distribution
dc.subject.keywordGeneral-circulation
dc.subject.keywordTropospheric ozone
dc.subject.keywordNorth-Atlantic
dc.subject.keywordArtic ozone
dc.subject.keywordTrends
dc.subject.keywordVariability
dc.subject.keywordClimatology
dc.subject.keywordReanalyses
dc.subject.keywordEvolution
dc.subject.ucmFísica atmosférica
dc.subject.unesco2501 Ciencias de la Atmósfera
dc.titleAnalyzing ozone variations and uncertainties at high latitudes during sudden stratospheric warming events using MERRA-2
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number22
dspace.entity.typePublication
relation.isAuthorOfPublication925c31bb-4d94-4804-abe0-3b32f789d6a1
relation.isAuthorOfPublication.latestForDiscovery925c31bb-4d94-4804-abe0-3b32f789d6a1
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