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Diurnal variations of BrONO₂ observed by MIPAS-B at midlatitudes and in the Arctic

Wetzel, Gerald 1; Oelhaf, Hermann 1; Höpfner, Michael ORCID iD icon 1; Friedl-Vallon, Felix 1; Ebersoldt, Andreas 2; Gulde, Thomas 1; Kazarski, Sebastian 1; Kirner, Oliver 3; Kleinert, Anne 1; Maucher, Guido 1; Nordmeyer, Hans 1; Orphal, Johannes 1; Ruhnke, Roland 1; Sinnhuber, Björn-Martin 1
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)
2 Institut für Prozessdatenverarbeitung und Elektronik (IPE), Karlsruher Institut für Technologie (KIT)
3 Steinbuch Centre for Computing (SCC), Karlsruher Institut für Technologie (KIT)

The first stratospheric measurements of the diurnal variation in the inorganic bromine (Bry) reservoir species BrONO2 around sunrise and sunset are reported. Arctic flights of the balloon-borne Michelson Interferometer for Passive Atmospheric Sounding (MIPAS-B) were carried out from Kiruna (68° N, Sweden) in January 2010 and March 2011 inside the stratospheric polar vortices where diurnal variations of BrONO2 around sunrise have been observed. High nighttime BrONO2 volume mixing ratios of up to 21 pptv (parts per trillion by volume) were detected in late winter 2011 in the absence of polar stratospheric clouds (PSCs). In contrast, the amount of measured BrONO2 was significantly lower in January 2010 due to low available NO2 amounts (for the build-up of BrONO2), the heterogeneous destruction of BrONO2 on PSC particles, and the gas-phase interaction of BrO (the source to form BrONO2) with ClO. A further balloon flight took place at midlatitudes from Timmins (49° N, Canada) in September 2014. Mean BrONO2 mixing ratios of 22 pptv were observed after sunset in the altitude region between 21 and 29 km. Measurements are compared and discussed with the results of a multi-year simulation performed with the chemistry climate model ECHAM5/MESSy Atmospheric Chemistry (EMAC). ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000077332
Veröffentlicht am 08.12.2017
DOI: 10.5194/acp-17-14631-2017
Zitationen: 3
Web of Science
Zitationen: 3
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
KIT-Zentrum Klima und Umwelt (ZKU)
Steinbuch Centre for Computing (SCC)
Universität Karlsruhe (TH) – Zentrale Einrichtungen (Zentrale Einrichtungen)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2017
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
KITopen-ID: 1000077332
HGF-Programm 12.03.04 (POF III, LK 01) Global and regional impacts atmos.proc.
Erschienen in Atmospheric chemistry and physics
Verlag European Geosciences Union (EGU)
Band 17
Heft 23
Seiten 14631–14643
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Dimensions
Web of Science
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