Evans, JS;
Deighan, J;
Jain, S;
Veibell, V;
Correira, J;
Al Matroushi, H;
Al Mazmi, H;
... Yurchenko, SN; + view all
(2024)
Retrieval of Ar, N2, O, and CO in the Martian Thermosphere Using Dayglow Limb Observations by EMM EMUS.
Journal of Geophysical Research: Planets
, 129
(4)
, Article e2023JE008181. 10.1029/2023JE008181.
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Yurchenko_JGR Planets - 2024 - Evans - Retrieval of Ar N2 O and CO in the Martian Thermosphere Using Dayglow Limb Observations by.pdf Download (2MB) | Preview |
Abstract
The Emirates Ultraviolet Spectrometer (EMUS) onboard the Emirates Mars Mission (EMM) Hope probe images Mars at wavelengths extending from approximately 100 to 170 nm. EMUS observations began in February 2021 and cover over a full Mars year. We report the first limb scan observations at Mars of ultraviolet emissions Ar I 106.6 nm, N I 120 nm, and carbon monoxide (CO) Fourth Positive Group (A − X) band system excited by electron impact on CO. We use EMUS limb scan observations to retrieve number density profiles of argon, molecular nitrogen, atomic oxygen, and CO in the upper atmosphere of Mars from 130 to 160 km. CO is a sensitive tracer of the thermal profile and winds in Mars' middle atmosphere and the chemistry that balances CO2 in the atmosphere of Mars. EMUS insertion orbit special observations demonstrate that far ultraviolet limb measurements of the Martian thermosphere can be spectroscopically analyzed with a robust retrieval algorithm to further quantify variations of CO composition in the Martian upper atmosphere.
| Type: | Article |
|---|---|
| Title: | Retrieval of Ar, N2, O, and CO in the Martian Thermosphere Using Dayglow Limb Observations by EMM EMUS |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2023JE008181 |
| Publisher version: | http://dx.doi.org/10.1029/2023je008181 |
| Language: | English |
| Additional information: | © 2024. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10191629 |
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