BERTHET, Gwenaël; RICAUD, Pierre; LEFÈVRE, Franck; LE FLOCHMOËN, E.; URBAN, Jakub; BARRET, Brice; LAUTIE, N.; DUPUY, E.; DE LA NOE, J.; MURTAGH, D.

doi:10.1029/2005GL022649

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

BERTHET, Gwenaël
Department of Applied Mathematics and Theoretical Physics [DAMTP]
Service d'aéronomie [SA]

RICAUD, Pierre
Laboratoire d'aérologie [LAERO]

LEFÈVRE, Franck
Service d'aéronomie [SA]

Langue

Article de revue

Ce document a été publié dans

Geophysical Research Letters. 2005, vol. 32, n° 11, p. L11812

American Geophysical Union

Résumé en anglais

We use measurements of chlorine monoxide (ClO) by the SMR instrument onboard the Odin satellite to study the nighttime thermal equilibrium between ClO and its dimer Cl2O2. Observations performed in the polar vortex during the 2002–2003 Arctic winter showed enhanced amounts of nighttime ClO over a wide range of stratospheric temperatures (185 < T < 225 K). Odin/SMR measurements are here compared to three-dimensional model calculations using various published estimations of the Keq equilibrium constant between ClO and Cl2O2. Our results show that the value of Keq currently recommended by JPL (Sander et al., 2003) leads to a large underestimation of the observed nighttime ClO amounts, and that a realistic estimation of Keq must lie between the values determined by Cox and Hayman (1988) and Von Hobe et al. (2005).< Réduire

Mots clés

Atmosphère moyenne

Composition chimique

Chimie atmosphérique

Mesure satellitaire

Métadonnées

Licence d’utilisation du document

Nighttime chlorine monoxide observations by the Odin satellite and implications for the ClO/Cl2O2 equilibrium

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés

DOI

Origine

Unités de recherche