Oxygen isotopic ratios in Martian water vapour observed by ACS MIR on board the ExoMars Trace Gas Orbiter
Juan Alday
1
C. F. Wilson
1
P. Irwin
1
Kevin Olsen
2
Lucio Baggio
2
Franck Montmessin
2
Alexander Trokhimovskiy
3
Oleg Korablev
3
Anna A. Fedorova
3
Denis Belyaev
3
Alexey Grigoriev
3
Andrey Patrakeev
3
Alexey Shakun
3
Lucio Baggio 2
Mail :
Author
Franck Montmessin 2
Mail :
Author IdHAL : franck-montmessin ORCID : https://orcid.org/0000-0002-4187-1457
Alexander Trokhimovskiy 3
Mail :
Author
Oleg Korablev 3
Author
Anna A. Fedorova 3
Author
Denis Belyaev 3
Author
Alexey Grigoriev 3
Author
Andrey Patrakeev 3
Author
Alexey Shakun 3
Author
1
Department of Physics [Oxford] ( Parks Rd, Oxford OX1 3PU / Keble Rd OX1 3RH - United Kingdom)
- University of Oxford [Oxford] (Wellington Square, Oxford OX1 2JD - United Kingdom)
2
IMPEC - LATMOS (France)
- LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales (11 boulevard d'Alembert
Quartier des Garennes
78280 - Guyancourt - France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8190 (55 avenue de Paris - 78035 Versailles cedex - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8190 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- SU - Sorbonne Université : UMR8190 (21 rue de l’École de médecine - 75006 Paris - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8190 (France)
3
IKI - Space Research Institute of the Russian Academy of Sciences (117997, 84/32 Profsoyuznaya Str, Moscow - Russia)
- RAS - Russian Academy of Sciences [Moscow] (Leninsky Ave, 14, Moscow, Russie, 119991 - Russia)
Abstract : Oxygen isotope ratios provide important constraints on the history of the Martian volatile system, revealing the impact of several processes that might fractionate them, such as atmospheric loss into space or interaction with the surface. We report infrared measurements of the Martian atmosphere obtained with the mid-infrared channel (MIR) of the Atmospheric Chemistry Suite (ACS), onboard the ExoMars Trace Gas Orbiter. Absorption lines of the three main oxygen isotopologues of water vapour (H216O, H218O, and H217O) observed in the transmission spectra allow, for the first time, the measurement of vertical profiles of the 18O/16O and 17O/16O ratios in atmospheric water vapour. The observed ratios are enriched with respect to Earth-like values (δ18O = 200 ± 80‰ and δ17O = 230 ± 110‰ corresponding to the Vienna Standard Mean Ocean Water). The vertical structure of these ratios does not appear to show significant evidence of altitudinal variations.
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https://hal-insu.archives-ouvertes.fr/insu-02288294
Contributor : Catherine Cardon <>
Submitted on : Saturday, September 14, 2019 - 5:58:51 PM
Last modification on : Friday, January 10, 2020 - 3:42:35 PM
Contributor : Catherine Cardon <>
Submitted on : Saturday, September 14, 2019 - 5:58:51 PM
Last modification on : Friday, January 10, 2020 - 3:42:35 PM
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- HAL Id : insu-02288294, version 1
- DOI : 10.1051/0004-6361/201936234
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INSU | LATMOS | UVSQ | CNRS | SORBONNE-UNIVERSITE | SU-SCIENCES | UNIV-PARIS-SACLAY
Citation
Juan Alday, C. F. Wilson, P. Irwin, Kevin Olsen, Lucio Baggio, et al.. Oxygen isotopic ratios in Martian water vapour observed by ACS MIR on board the ExoMars Trace Gas Orbiter. Astronomy and Astrophysics - A&A, EDP Sciences, 2019, 630, A91 (8p.). ⟨10.1051/0004-6361/201936234⟩. ⟨insu-02288294⟩
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