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Unusual chlorine partitioning in the 2015/16 Arctic winter lowermost stratosphere: Observations and simulations

Johansson, Sören ORCID iD icon 1; Santee, Michelle L.; Grooß, Jens-Uwe; Höpfner, Michael ORCID iD icon 1; Braun, Marleen 1; Friedl-Vallon, Felix 1; Khosrawi, Farahnaz 1; Kirner, Oliver 2; Kretschmer, Erik 1; Oelhaf, Hermann 1; Orphal, Johannes 1; Sinnhuber, Björn-Martin 1; Tritscher, Ines; Ungermann, Jörn; Walker, Kaley A.; Woiwode, Wolfgang 1
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)
2 Steinbuch Centre for Computing (SCC), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):
The Arctic winter 2015/16 was characterized by cold stratospheric temperatures. Here we present a comprehensive view of the temporal evolution of chlorine in the lowermost stratosphere over the course of the studied winter. We utilize two-dimensional vertical cross sections of ozone (\chem{O_3}) and chlorine nitrate (\chem{ClONO_2}), measured by the airborne limb imager GLORIA (Gimballed Limb Observer for Radiance Imaging of the Atmosphere) during the POLSTRACC/GW-LCYCLE~II/GWEX/SALSA campaigns, to investigate the tropopause region in detail. Observations from three long-distance flights in January, February, and March~2016 are discussed. \chem{ClONO_2} volume mixing ratios up to 1100\,pptv were measured at 380\,K potential temperature in mesoscale structures. Similar mesoscale structures are also visible in \chem{O_3} measurements. Both trace gas measurements are applied to evaluate simulation results from the chemistry transport model CLaMS (Chemical Lagrangian Model of the Stratosphere) and the chemistry--climate model EMAC (ECHAM5/MESSy Atmospheric Chemistry). These comparisons show agreement within the expected performance of these models.
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Verlagsausgabe §
DOI: 10.5445/IR/1000096053
Veröffentlicht am 27.06.2019
DOI: 10.5194/acp-19-8311-2019
Zitationen: 7
Zitationen: 7
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)
Steinbuch Centre for Computing (SCC)
Universität Karlsruhe (TH) – Zentrale Einrichtungen (Zentrale Einrichtungen)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000096053
HGF-Programm 12.04.03 (POF III, LK 01) Stratospheric Ozone and Climate Change
Weitere HGF-Programme 46.11.01 (POF III, LK 01) Computational Science and Mathematical Methods
Erschienen in Atmospheric chemistry and physics
Verlag European Geosciences Union (EGU)
Band 19
Heft 12
Seiten 8311–8338
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 27.06.2019
Schlagwörter GLORIA, MLS, CLaMS, EMAC. POLSTRACC, Ozone depletion, Arctic winter, 2015/16, Chlorine
Nachgewiesen in Web of Science
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