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| Titel |
Semi-empirical models for chlorine activation and ozone depletion in the Antarctic stratosphere: proof of concept |
| VerfasserIn |
P. E. Huck, G. E. Bodeker, S. Kremser, A. J. McDonald, M. Rex, H. Struthers |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 6 ; Nr. 13, no. 6 (2013-03-19), S.3237-3243 |
| Datensatznummer |
250018530
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| Publikation (Nr.) |
 copernicus.org/acp-13-3237-2013.pdf |
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| Zusammenfassung |
| Two semi-empirical models were developed for the Antarctic stratosphere to
relate the shift of species within total chlorine (Cly =
HCl + ClONO2 + HOCl + 2 × Cl2 +
2×Cl2O2 + ClO + Cl) into the active forms
(here: ClOx = 2×Cl2O2 + ClO), and to
relate the rate of ozone destruction to ClOx. These two models
provide a fast and computationally inexpensive way to describe the inter- and
intra-annual evolution of ClOx and ozone mass deficit (OMD) in
the Antarctic spring. The models are based on the underlying
physics/chemistry of the system and capture the key chemical and physical
processes in the Antarctic stratosphere that determine the interaction
between climate change and Antarctic ozone depletion. They were developed
considering bulk effects of chemical mechanisms for the duration of the
Antarctic vortex period and quantities averaged over the vortex area. The
model equations were regressed against observations of daytime ClO and OMD
providing a set of empirical fit coefficients. Both semi-empirical models are
able to explain much of the intra- and inter-annual variability observed in
daily ClOx and OMD time series. This proof-of-concept paper
outlines the semi-empirical approach to describing the evolution of Antarctic
chlorine activation and ozone depletion. |
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