DOI: 10.1038/s41561-020-00678-w
论文题名: The vertical structure of CO in the Martian atmosphere from the ExoMars Trace Gas Orbiter
作者: Olsen K.S. ; Lefèvre F. ; Montmessin F. ; Fedorova A.A. ; Trokhimovskiy A. ; Baggio L. ; Korablev O. ; Alday J. ; Wilson C.F. ; Forget F. ; Belyaev D.A. ; Patrakeev A. ; Grigoriev A.V. ; Shakun A.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2021
卷: 14, 期: 2 起始页码: 67
结束页码: 71
语种: 英语
英文关键词: carbon dioxide
; carbon monoxide
; Hadley cell
; Mars
; Martian atmosphere
; mixing ratio
; photolysis
; satellite altimetry
; spacecraft
英文摘要: Carbon monoxide (CO) is the main product of CO2 photolysis in the Martian atmosphere. Production of CO is balanced by its loss reaction with OH, which recycles CO into CO2. CO is therefore a sensitive tracer of the OH-catalysed chemistry that contributes to the stability of CO2 in the atmosphere of Mars. To date, CO has been measured only in terms of vertically integrated column abundances, and the upper atmosphere, where CO is produced, is largely unconstrained by observations. Here we report vertical profiles of CO from 10 to 120 km, and from a broad range of latitudes, inferred from the Atmospheric Chemistry Suite on board the ExoMars Trace Gas Orbiter. At solar longitudes 164–190°, we observe an equatorial CO mixing ratio of ~1,000 ppmv (10–80 km), increasing towards the polar regions to more than 3,000 ppmv under the influence of downward transport of CO from the upper atmosphere, providing a view of the Hadley cell circulation at Mars’s equinox. Observations also cover the 2018 global dust storm, during which we observe a prominent depletion in the CO mixing ratio up to 100 km. This is indicative of increased CO oxidation in a context of unusually large high-altitude water vapour, boosting OH abundance. © 2021, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169801
Appears in Collections: 气候变化与战略
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作者单位: Department of Physics, University of Oxford, Oxford, United Kingdom; Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université Paris-Saclay, Sorbonne Université, Centre National de la Recherche Scientifique (CNRS), Guyancourt, France; Space Research Institute of the Russian Academy of Sciences (IKI RAS), Moscow, Russian Federation; Laboratoire de Météorologie Dynamique (LMD), Sorbonne Université, CNRS, Paris, France
Recommended Citation:
Olsen K.S.,Lefèvre F.,Montmessin F.,et al. The vertical structure of CO in the Martian atmosphere from the ExoMars Trace Gas Orbiter[J]. Nature Geoscience,2021-01-01,14(2)