Enhanced stratosphere/troposphere coupling during extreme warm stratospheric events with strong polar-night jet oscillation

dc.bibliographicCitation.firstPage467eng
dc.bibliographicCitation.issue12eng
dc.bibliographicCitation.journalTitleAtmosphereeng
dc.bibliographicCitation.lastPage348eng
dc.bibliographicCitation.volume9eng
dc.contributor.authorPeters, D.H.W.
dc.contributor.authorSchneidereit, A.
dc.contributor.authorKarpechko, A.Y.
dc.date.accessioned2020-11-25T14:52:42Z
dc.date.available2020-11-25T14:52:42Z
dc.date.issued2018
dc.description.abstractExtreme warm stratospheric events during polar winters from ERA-Interim reanalysis and CMIP5-ESM-LR runs were separated by duration and strength of the polar-night jet oscillation (PJO) using a high statistical confidence level of three standard deviations (strong-PJO events). With a composite analysis, we demonstrate that strong-PJO events show a significantly stronger downward propagating signal in both, northern annular mode (NAM) and zonal mean zonal wind anomaly in the stratosphere in comparison with non-PJO events. The lower stratospheric EP-flux-divergence difference in ERA-Interim was stronger in comparison to long-term CMIP5-ESM-LR runs (by a factor of four). This suggests that stratosphere-troposphere coupling is stronger in ERA-Interim than in CMIP5-ESM-LR. During the 60 days following the central date (CD), the Arctic oscillation signal was more intense during strong-PJO events than during non-PJO events in ERA-Interim data in comparison to CMIP5-ESM-LR runs. During the 15-day phase after CD, strong PJO events had a significant increase in stratospheric ozone, upper tropospheric zonally asymmetric impact, and a regional surface impact in ERA-Interim. Finally, we conclude that the applied high statistical threshold gives a clearer separation of extreme warm stratospheric events into strong-PJO events and non-PJO events including their different downward propagating NAM signal and tropospheric impacts. © 2018 by the authors.eng
dc.description.fondsLeibniz_Fonds
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://doi.org/10.34657/4633
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/6004
dc.language.isoengeng
dc.publisherBasel : MDPI AGeng
dc.relation.doihttps://doi.org/10.3390/atmos9120467
dc.relation.issn2073-4433
dc.rights.licenseCC BY 4.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/eng
dc.subject.ddc550eng
dc.subject.otherArctic oscillationeng
dc.subject.otherCMIP5eng
dc.subject.otherEP-flux divergenceeng
dc.subject.otherERA-Interimeng
dc.subject.otherMajor sudden stratospheric warmingseng
dc.subject.otherMPI-ESM-LReng
dc.subject.otherNorthern annular modeeng
dc.subject.otherPolar-night jet oscillationeng
dc.subject.otherWarm stratospheric eventseng
dc.subject.otherOzone layereng
dc.subject.otherTroposphereeng
dc.subject.otherArctic Oscillationeng
dc.subject.otherCMIP5eng
dc.subject.otherEra interimseng
dc.subject.otherFlux divergenceseng
dc.subject.otherNorthern annular modeeng
dc.subject.otherPolar-night jeteng
dc.subject.otherStratospheric warmingseng
dc.subject.otherWarm stratospheric eventseng
dc.subject.otherClimate modelseng
dc.subject.otherArctic Oscillationeng
dc.subject.otherCMIPeng
dc.subject.othercouplingeng
dc.subject.otherextreme eventeng
dc.subject.otherjeteng
dc.subject.otherstratosphere-troposphere interactioneng
dc.subject.othersudden stratospheric warmingeng
dc.subject.otherzonal windeng
dc.titleEnhanced stratosphere/troposphere coupling during extreme warm stratospheric events with strong polar-night jet oscillationeng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccesseng
wgl.contributorIAPeng
wgl.subjectGeowissenschafteneng
wgl.typeZeitschriftenartikeleng
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