Evidence for carbonyl sulfide (OCS) conversion to CO in the lower atmosphere of Venus - Observatoire de Paris Accéder directement au contenu
Article Dans Une Revue Journal of Geophysical Research. Planets Année : 2009

Evidence for carbonyl sulfide (OCS) conversion to CO in the lower atmosphere of Venus

Résumé

The chemical regimes in the atmosphere of Venus vary from photochemistry in the middle atmosphere to thermal equilibrium chemistry in the lower atmosphere and the surface. Many chemical cycles have been proposed, but few details about these cycles are fully verified by comparison between observations and modeling. Recent high-quality data of carbonyl sulfide (OCS) and CO from ground-based and Venus Express observations provide a unique opportunity to test our understanding of chemistry and transport in the lower atmosphere of Venus. The spatial distributions of OCS and CO in the atmosphere reflect a sensitive balance between chemistry and transport. On the basis of our updated photochemical model and winds from Lee et al.'s (2007) general circulation model, we study the chemistry and transport in a simplified two-dimensional chemistry-transport model. OCS is produced by heterogeneous reactions on the surface; the middle atmosphere is a net sink for OCS. The combination of data and modeling provides strong evidence for the loss of OCS by conversion to CO. The detailed chemical mechanism is currently unknown, although a number of speculations have been proposed. The sensitivity of the distributions of OCS and CO to model parameters is reported.
Fichier principal
Vignette du fichier
2008JE003094.pdf (733.71 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

insu-03161448 , version 1 (06-03-2021)

Identifiants

Citer

Yuk L. Yung, M. C. Liang, X. Jiang, R. L. Shia, C. Lee, et al.. Evidence for carbonyl sulfide (OCS) conversion to CO in the lower atmosphere of Venus. Journal of Geophysical Research. Planets, 2009, 114 (E5), ⟨10.1029/2008JE003094⟩. ⟨insu-03161448⟩
85 Consultations
123 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More