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Nitrification of the lowermost stratosphere during the exceptionally cold Arctic winter 2015-2016

Braun, M.; Grooß, J.-U.; Woiwode, W.; Johansson, S.; Höpfner, M.; Friedl-Vallon, F.; Oelhaf, H.; Preusse, P.; Ungermann, J.; Sinnhuber, B.-M.; Ziereis, H.; Braesicke, P.

Abstract (englisch):
The Arctic winter 2015–2016 was characterized by exceptionally low stratospheric temperatures, favouring the formation of polar stratospheric clouds (PSCs) from mid-December until the end of February down to low stratospheric altitudes. Observations by GLORIA (Gimballed Limb Observer for Radiance Imaging of the Atmosphere) on HALO (High Altitude and LOng range research aircraft) during the PGS (POLSTRACC–GW-LCYCLE II–SALSA) campaign from December 2015 to March 2016 allow the investigation of the influence of denitrification on the lowermost stratosphere (LMS) with a high spatial resolution. Two-dimensional vertical cross sections of nitric acid (HNO3) along the flight track and tracer–tracer correlations derived from the GLORIA observations document detailed pictures of wide-spread nitrification of the Arctic LMS during the course of an entire winter. GLORIA observations show large-scale structures and local fine structures with enhanced absolute HNO3 volume mixing ratios reaching up to 11 ppbv at altitudes of 13 km in January and nitrified filaments persisting until the middle of March. Narrow coherent structures tilted with altitude of enhanced HNO3, observed in mid-January, are interpreted as regions recently nitrified by sublimating HNO3-containing particles. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000100213
Veröffentlicht am 25.11.2019
Originalveröffentlichung
DOI: 10.5194/acp-19-13681-2019
Web of Science
Zitationen: 1
Coverbild
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
KITopen-ID: 1000100213
HGF-Programm 12.04.03 (POF III, LK 01)
Erschienen in Atmospheric chemistry and physics
Band 19
Heft 21
Seiten 13681-13699
Vorab online veröffentlicht am 11.11.2019
Nachgewiesen in Web of Science
Scopus
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