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Impact of deep convection and dehydration on bromine loading in the upper troposphere and lower stratosphere

Aschmann, J.; Sinnhuber, B. M. ORCID iD icon 1; Chipperfield, M. P.; Hossaini, R.
1 Karlsruher Institut für Technologie (KIT)


Stratospheric bromine loading due to very shortlived substances is investigated with a three-dimensional chemical transport model over a period of 21 years using meteorological input data from the European Centre for Medium-Range Weather Forecasts ERA-Interim reanalysis from 1989 to the end of 2009. Within this framework we analyze the impact of dehydration and deep convection on the amount of stratospheric bromine using an idealized and a detailed full chemistry approach. We model the two most important brominated short-lived substances, bromoform (CHBr3) and dibromomethane (CH2Br2), assuming a uniform convective detrainment mixing ratio of 1 part per trillion by volume (pptv) for both species. The contribution of very short-lived substances to stratospheric bromine varies drastically with the applied dehydration mechanism and the associated scavenging of soluble species ranging from 3.4 pptv in the idealized setup up to 5 pptv using the full chemistry scheme. In the latter case virtually the entire amount of bromine originating from very short-lived source gases is able to reach the stratosphere thus rendering the impact of dehydration and scavenging on inorganic bromine in the tropopause insignificant. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000039023
Veröffentlicht am 09.03.2018
DOI: 10.5194/acp-11-2671-2011
Zitationen: 39
Web of Science
Zitationen: 36
Zitationen: 51
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 2011
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
KITopen-ID: 1000039023
HGF-Programm 12.04.01 (POF II, LK 01) Dynamik und Transporte
Erschienen in Atmospheric chemistry and physics
Verlag European Geosciences Union (EGU)
Band 11
Heft 6
Seiten 2671-2687
Externe Relationen Abstract/Volltext
Nachgewiesen in Web of Science
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