Open AccessOdin/OSIRIS observations of stratospheric BrO: Retrieval methodology, climatology, and inferred Br y
Author(s) -
McLinden C. A.,
Haley C. S.,
Lloyd N. D.,
Hendrick F.,
Rozanov A.,
Sinnhuber B.M.,
Goutail F.,
Degenstein D. A.,
Llewellyn E. J.,
Sioris C. E.,
Van Roozendael M.,
Pommereau J. P.,
Lotz W.,
Burrows J. P.
Publication year - 2010
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2009jd012488
Subject(s) - stratosphere , radiance , osiris , satellite , spectrograph , occultation , environmental science , atmospheric sciences , remote sensing , meteorology , physics , spectral line , geology , astronomy , botany , biology
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 NO 2 is consistent with our current understanding of bromine chemistry. Monthly mean Br y maps are derived. Two methods of calculating total Br y 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.