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Mesoscale fine structure of a tropopause fold over mountains

Woiwode, Wolfgang 1; Dörnbrack, Andreas; Bramberger, Martina; Friedl-Vallon, Felix 1; Haenel, Florian 1; Höpfner, Michael ORCID iD icon 1; Johansson, Sören ORCID iD icon 1; Kretschmer, Erik 1; Krisch, Isabell; Latzko, Thomas 1; Oelhaf, Hermann 1; Orphal, Johannes 1; Preusse, Peter; Sinnhuber, Björn-Martin 1; Ungermann, Jörn
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)


We report airborne remote-sensing observations of a tropopause fold during two crossings of the polar front jet over northern Italy on 12 January 2016. The GLORIA (Gimballed Limb Observer for Radiance Imaging of the Atmosphere) observations allowed for a simultaneous mapping of temperature, water vapour, and ozone. They revealed deep, dry, and ozone-rich intrusions into the troposphere. The mesoscale fine structures of dry filaments at the cyclonic shear side north of the jet and tongues of moist air entraining tropospheric air into the stratosphere along the anticyclonic shear side south of the jet were clearly resolved by GLORIA observations. Vertically propagating mountain waves with recorded temperature residuals exceeding ±3 K were detected above the Apennines. Their presence enhanced gradients of all variables locally in the vicinity of the tropopause. The combination of H2O−O3 correlations with potential temperature reveals an active mixing region and shows clear evidence of troposphere-to-stratosphere and stratosphere-to-troposphere exchange. High-resolution short-term deterministic forecasts of ECMWF's integrated forecast system (IFS) applying GLORIA's observational filter reproduce location, shape, and depth of the tropopause fold very well. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000087175
Veröffentlicht am 06.11.2018
DOI: 10.5194/acp-18-15643-2018
Zitationen: 16
Web of Science
Zitationen: 15
Zitationen: 15
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000087175
HGF-Programm 12.04.03 (POF III, LK 01) Stratospheric Ozone and Climate Change
Erschienen in Atmospheric chemistry and physics
Verlag European Geosciences Union (EGU)
Band 18
Heft 21
Seiten 15643–15667
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 30.10.2018
Nachgewiesen in Scopus
Web of Science
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