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| Titel |
RECONCILE Airborne ClOx Measurements and the ClO/ClOOCl Equilibrium Constant |
| VerfasserIn |
Fred Stroh, Jens-Uwe Grooß, Florian Heinecke, Olga Sumińska, Marc von Hobe, Michael Volk, Tobias Wegner |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250082512
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| Zusammenfassung |
| ClOx (denoting mainly ClO and its peroxide dimer ClOOCl) chemistry is driving the ClO
dimer and ClO-BrO catalytic ozone destruction cycles leading to the ozone hole phenomena
in southern and northern high latitudes.
HALOX is an in-situ instrument to measure ClO and ClO dimer by the technique of
thermal dissociation (of the dimer) followed by chemical conversion and resonance
fluorescence (CCRF) detection of the halogen atoms. The instrument was installed onboard
the high-flying research aircraft M55 Geophysica during the RECONCILE Arctic field
campaign in early 2010. While results for the ClO dimer, ClOOCl, photolysis derived
from the sunrise evolution of ClO during a self-match flight have been recently
published by Suminska-Ebersoldt et al. (Atmosph. Chem. Phys. 12, 1353-1365,
2012) we now present ClO dimer data which could only be derived after thorough
laboratory calibrations of the thermolysis efficiency of the HALOX inlet heater
element.
Details of the calibration setup and the procedure are presented and preliminary results
for the ClO/ClOOCl equilibrium constant are derived and discussed. |
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