Odin/OSIRIS observations of stratospheric BrO: Retrieval methodology, climatology, and inferred Bry - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Geophysical Research: Atmospheres Année : 2010

Odin/OSIRIS observations of stratospheric BrO: Retrieval methodology, climatology, and inferred Bry

Résumé

A 7+ year (2001–2008) data set of stratospheric BrO profiles measured by the Optical Spectrograph and Infra-Red Imager System (OSIRIS) instrument, a UV-visible spectrometer measuring limb-scattered sunlight from the Odin satellite, is presented. Zonal mean radiance spectra are computed for each day and inverted to yield effective daily zonal mean BrO profiles from 16 to 36 km. A detailed description of the retrieval methodology and error analysis is presented. Single-profile precision and effective resolution are found to be about 30% and 3–5 km, respectively, throughout much of the retrieval range. Individual profile and monthly mean comparisons with ground-based, balloon, and satellite instruments are found to agree to about 30%. A BrO climatology is presented, and its morphology and correlation with NO2 is consistent with our current understanding of bromine chemistry. Monthly mean Bry maps are derived. Two methods of calculating total Bry in the stratosphere are used and suggest (21.0 ± 5.0) pptv with a contribution from very short lived substances of (5.0 ± 5.0) pptv, consistent with other recent estimates.

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Dates et versions

hal-00509346 , version 1 (22-02-2016)

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C. A. Mclinden, C. S. Haley, N. D. Lloyd, F. Hendrick, A. Rozanov, et al.. Odin/OSIRIS observations of stratospheric BrO: Retrieval methodology, climatology, and inferred Bry. Journal of Geophysical Research: Atmospheres, 2010, 115 (D15), pp.D15308. ⟨10.1029/2009JD012488⟩. ⟨hal-00509346⟩
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