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| Titel |
Partitioning and budget of inorganic and organic chlorine observed by MIPAS-B and TELIS in the Arctic in January 2010 and March 2011 |
| VerfasserIn |
Gerald Wetzel, Manfred Birk, Arno de Lange, Hermann Oelhaf, Felix Friedl-Vallon, Oliver Kirner, Anne Kleinert, Guido Maucher, Hans Nordmeyer, Johannes Orphal, Roland Ruhnke, Björn-Martin Sinnhuber |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250088710
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| Publikation (Nr.) |
 EGU/EGU2014-2852.pdf |
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| Zusammenfassung |
| Arctic winters 2009/2010 and 2010/2011 were characterized by strong vortices with
extremely cold temperatures in the lower stratosphere above northern Scandinavia. Hence,
the occurrence of widespread polar stratospheric clouds enabled a strong activation of
chlorine compounds (ClOx) which rapidly destroyed ozone when sunlight returned after
winter solstice.
MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) balloon
measurements obtained in northern Sweden on 24 January 2010 and 31 March 2011 inside
the polar vortices have provided vertical profiles of inorganic and organic chlorine species as
well as diurnal variations of ClO around sunrise over the whole altitude range in which
chlorine is undergoing activation and deactivation. The first flight was carried out in
very cold chlorine-activated air with widespread polar stratospheric clouds. The
second one was performed at the end of the winter during the last phase of ClOx
deactivation.
The Terahertz and submillimeter Limb Sounder TELIS was mounted on the MIPAS
balloon gondola. TELIS is able to detect the chlorine species ClO and HCl. The
complete inorganic and organic chlorine partitioning and budget in the stratosphere
has been derived by combining MIPAS-B and TELIS simultaneously observed
molecules.
Observations are compared and discussed with calculations performed with the
3-dimensional Chemistry Climate Model EMAC (ECHAM5/MESSy Atmospheric
Chemistry). |
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