气候变化领域集成服务门户(CCPortal): The vertical structure of CO in the Martian atmosphere from the ExoMars Trace Gas Orbiter

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DOI	10.1038/s41561-020-00678-w
	The vertical structure of CO in the Martian atmosphere from the ExoMars Trace Gas Orbiter
	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.
发表日期	2021
ISSN	17520894
起始页码	67
结束页码	71
卷号	14 期号:2
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.
英文关键词	carbon dioxide; carbon monoxide; Hadley cell; Mars; Martian atmosphere; mixing ratio; photolysis; satellite altimetry; spacecraft
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206945
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
推荐引用方式 GB/T 7714	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],2021,14(2).
APA	Olsen K.S..,Lefèvre F..,Montmessin F..,Fedorova A.A..,Trokhimovskiy A..,...&Shakun A..(2021).The vertical structure of CO in the Martian atmosphere from the ExoMars Trace Gas Orbiter.Nature Geoscience,14(2).
MLA	Olsen K.S.,et al."The vertical structure of CO in the Martian atmosphere from the ExoMars Trace Gas Orbiter".Nature Geoscience 14.2(2021).