KIT | KIT-Bibliothek | Impressum | Datenschutz
Open Access Logo
§
Verlagsausgabe
DOI: 10.5445/IR/110075354
Veröffentlicht am 27.04.2018
Originalveröffentlichung
DOI: 10.5194/acp-9-1817-2009
Scopus
Zitationen: 6
Web of Science
Zitationen: 6

HOCl chemistry in the Antarctic stratospheric vortex 2002, as observed with the Michelson interferometer for passive atmospheric sounding (MIPAS)

Clarmann, T.von; Glatthor, N.; Ruhnke, R.; Stiller, G.P.; Kirner, O.; Reddmann, T.; Höpfner, M.; Kellmann, S.; Kouker, W.; Linden, A.; Funke, B.

Abstract:
In the 2002 Antarctic polar vortex enhanced HOCl mixing ratios were detected by the Michelson Interferometer for Passive Atmospheric Sounding both at altitudes of around 35 km (1000K potential temperature), where HOCl abundances are ruled by gas phase chemistry and at around 18–24 km (475–625 K), which belongs to the altitude domain where heterogeneous chlorine chemistry is relevant. At altitudes of 33 to 40 km polar vortex HOCl mixing ratios were found to be around 0.14 ppbv as long as the polar vortex was intact, centered at the pole, and thus received relatively little sunlight. This is the altitude region where in midlatitudinal and tropic atmospheres peak HOCl mixing ratios significantly above 0.2 ppbv (in terms of daily mean values) are observed. After deformation and displacement of the polar vortex in the course of a major warming, ClO-rich vortex air was more exposed to sunlight, where enhanced HOx abundances led to largely increased HOCl mixing ratios (up to 0.3 ppbv), exceeding typical midlatitudinal and tropical amounts significantly. The HOCl increase was preceded by an increase of ClO. Model runs could reproduce these ... mehr


Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2009
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
URN: urn:nbn:de:swb:90-AAA1100753540
KITopen ID: 110075354
HGF-Programm 12.04.02; LK 01
Erschienen in Atmospheric chemistry and physics
Band 9
Seiten 1817-1829
Erscheinungsvermerk DOI:10.5194/acp-9-1817-2009
URLs Volltext
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft KITopen Landing Page