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

Johansson, Sören; Santee, Michelle L.; Grooß, Jens-Uwe; Höpfner, Michael; Braun, Marleen; Friedl-Vallon, Felix; Khosrawi, Farahnaz; Kirner, Oliver; Kretschmer, Erik; Oelhaf, Hermann; Orphal, Johannes; Sinnhuber, Björn-Martin; Tritscher, Ines; Ungermann, Jörn; Walker, Kaley A.; Woiwode, Wolfgang

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: 2
Web of Science
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Steinbuch Centre for Computing (SCC)
Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
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
Erschienen in Atmospheric chemistry and physics
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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