Reference : Spectroscopic detection of COClF in the tropical and mid-latitude lower stratosphere
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Spectroscopic detection of COClF in the tropical and mid-latitude lower stratosphere
Rinsland, Curtis P. [> > > >]
Nassar, Ray [> > > >]
Boone, Christopher D. [University of Waterloo]
Bernath, Peter [> > > >]
Chiou, Linda [> > > >]
Weisenstein, Debra K. [> > > >]
Mahieu, Emmanuel mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Zander, Rodolphe mailto [Université de Liège - ULg > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences) >]
Journal of Quantitative Spectroscopy & Radiative Transfer
Pergamon-Elsevier Science Ltd
Yes (verified by ORBi)
[en] remote sensing ; stratospheric chemistry ; infrared atmospheric remote sounding ; measurement-model comparisons ; stratospheric chlorine chemistry ; stratospheric fluorine chemistry
[en] We report retrievals of COClF (carbonyl chlorofluoride) based on atmospheric chemistry experiment (ACE) solar occultation spectra recorded at tropical and mid-latitudes during 2004-2005. The COClF molecule is a temporary reservoir of both chlorine and fluorine and has not been measured previously by remote sensing. A maximum COClF mixing ratio of 99.7 +/- 48.0 pptv (10(-12) per unit volume, 1 sigma) is measured at 28 km for tropical and subtropical occultations (latitudes below 20 degrees in both hemispheres) with lower mixing ratios at both higher and lower altitudes. Northern hemisphere mid-latitude mixing ratios (30-50 degrees N) resulted in an average profile with a peak mixing ratio of 51.7 +/- 132.1 pptv, 1 sigma, at 27 km, also decreasing above and below that altitude. We compare the measured average profiles with the one reported set of in situ lower stratospheric mid-latitude measurements from 1986 and 1987, a previous two-dimensional (2-D) model calculation for 1987 and 1993, and a 2-D-model prediction for 2004. The measured average tropical profile is in close agreement with the model prediction; the northern mid-latitude profile is also consistent, although the peak in the measured profile occurs at a higher altitude (2.5-4.5 km offset) than in the model prediction. Seasonal average 2-D-model predictions of the COClF stratospheric distribution for 2004 are also reported. (c) 2006 Elsevier Ltd. All rights reserved.

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