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Isotopic composition of CO2 in the atmosphere of Mars: Fractionation by diffusive separation observed by the ExoMars Trace Gas Orbiter

Abstract:

Isotopic ratios in atmospheric CO2 are shaped by various processes throughout Mars' history, and can help understand what the atmosphere of early Mars was like to sustain liquid water on its surface. In this study, we monitor the O and C isotopic composition of CO2 between 70 and 130 km for more than half a Martian year using solar occultation observations by the Atmospheric Chemistry Suite onboard the ExoMars Trace Gas Orbiter. We find the vertical trends of the isotopic ratios to be consist...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1029/2021je006992

Authors


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Role:
Author
ORCID:
0000-0003-1459-3444
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Role:
Author
ORCID:
0000-0001-5355-1533
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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atmos Ocean & Planet Physics
Oxford college:
St Anne's College
Role:
Author
ORCID:
0000-0002-6772-384X
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Role:
Author
ORCID:
0000-0003-4041-4972
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Role:
Author
ORCID:
0000-0002-4187-1457
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Name:
Science and Technology Facilities Council
Grant:
ST/N00082X/1
Publisher:
American Geophysical Union
Journal:
Journal of Geophysical Research: Planets More from this journal
Volume:
126
Issue:
12
Article number:
e2021JE006992
Publication date:
2021-12-17
Acceptance date:
2021-12-04
DOI:
EISSN:
2169-9100
ISSN:
2169-9097
Language:
English
Keywords:
Pubs id:
1230219
Local pid:
pubs:1230219
Deposit date:
2022-01-06

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