Journal Article

PreJuSER-57887

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Polar stratospheric chlorine kinetics from a self-match flight during SOLVE-II/EUPLEX

Schofield, R. ; Frieler, K. ; Wohltmann, I. ; Rex, M. ; von Hobe, M.FZJ* ; Stroh, F.FZJ* ; Koch, G. ; Peter, T. ; Canty, R. ; Salawitch, R. ; Volk, C. M.

2008
American Geophysical Union Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/20799  doi:10.1029/2007GL031740

Abstract: In-situ measurements of ClO made onboard the Geophysica aircraft on 30 January 2003 in the Arctic afford a novel approach to constrain the kinetic parameters governing polar stratospheric chlorine chemistry using atmospheric observations. The self-match flight pattern, i.e.sampling individual air masses twice at different zenith angles, was utilized by simulating the evolution of ClO mixing ratios between two 'matching' points using a photochemical model and optimizing the model parameters to fit the observations within a retrieval framework. Our results suggest a ClO/ClOOCl thermal equilibrium constant K-eq a factor of 5 smaller and a ratio J/k(f) a factor of 2 larger than the values based on the JPL recommendations. This concurs with other studies based on observed ClOx partitioning and corroborates that our understanding of stratospheric chlorine chemistry is incomplete, particularly in the light of the most recent laboratory experiments pointing to a J/k(f) ratio almost an order of magnitude below the JPL recommendation.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Research Program(s):

1. Atmosphäre und Klima (P22)

Appears in the scientific report 2008

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Database coverage:

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