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Is OBrO present in the stratosphere?

Abstract : The analysis of the residue of spectra obtained at night by the AMON instrument during stratospheric flights shows that some absorption features remain in the 430–535 nm range, while the ozone, Rayleigh and NO2 contributions disappear. There is a good agreement between these structures and those obtained recently by laboratory measurements. By assuming a maximum for the OBrO cross sections similar to the maximum of OClO cross sections, the mixing ratio of OBrO would be around 20 pptv. Thus, OBrO could be the principal bromine species at night in a large part of the stratosphere at mid-latitude. The consequence of this result on the chemistry of bromine species in the stratosphere is discussed
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Submitted on : Tuesday, June 23, 2020 - 4:52:47 PM
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Jean-Baptiste Renard, Michel Pirre, Claude Robert, Daniel Huguenin. Is OBrO present in the stratosphere?. Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science, Elsevier, 1997, 325 (12), pp.921-924. ⟨10.1016/S1251-8050(97)82370-1⟩. ⟨insu-02879296⟩



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