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| Titel |
Simultaneous balloon-borne measurements of the key inorganic bromine species BrO and BrONO2 in the stratosphere: DOAS and MIPAS-B evaluation |
| VerfasserIn |
Sebastian Kazarski, Guido Maucher, Andreas Ebersoldt, André Butz, Felix Friedl-Vallon, Michael Höpfner, Anne Kleinert, Hans Nordmeyer, Hermann Oelhaf, Klaus Pfeilsticker, Björn-Martin Sinnhuber, Gerald Wetzel, Johannes Orphal |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250103348
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| Publikation (Nr.) |
 EGU/EGU2015-2757.pdf |
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| Zusammenfassung |
| Inorganic bromine contributes to a loss of stratospheric ozone of about 25 - 30%.
Past studies have demonstrated several uncertainties in the photochemistry of
stratospheric bromine, especially by considering the three body reaction (kBrONO2)
BrO + NO2 + M / BrONO2 + M, and the photolysis frequencies of BrONO2
(jBrONO2). Hence, an improved knowledge of the ratio jBrONO2/kBrONO2 is crucial to
better assess the bromine-related loss of ozone as well as the total amount of bromine in the
stratosphere.
Here, we report on the first simultaneous balloon-borne measurements of NO2, BrO, and
BrONO2 in the stratosphere, performed over Timmins (Ontario, 49 °N, Canada) on Sept., 7th
and 8th, 2014. During the flight the targeted species were monitored by remote sensing in the
UV, visible and mid-IR spectral ranges by Differential Optical Absorption Spectroscopy
(DOAS) and Michelson Interferometer for Passive Atmospheric Sounding (MIPAS-B),
respectively. The analysis and interpretation of the measurements involves radiative transfer
as well as photochemical modelling. Major features of the applied techniques are reported
and first results of the DOAS as well as MIPAS-B evaluation are discussed. Further
investigations address inter-comparisons of the retrieved NO2, BrO, and O3 concentrations
and volume mixing ratios, to demonstrate validations of both evaluation methods. |
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