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(2021).
DOI: https://doi.org/10.1029/2021GL092650
Abstract
Following the recent detection of HCl in the atmosphere of Mars by ExoMars/Trace Gas Orbiter, we present here the first measurement of the 37Cl/35Cl isotopic ratio in the Martian atmosphere using a set of Nadir Occultation for MArs Discovery (NOMAD) observations. We determine an isotopic anomaly of −6 ± 78‰ compared to Earth standard, consistent with the −51‰–−1‰ measured on Mars’ surface by Curiosity. The measured isotopic ratio is also consistent with surface measurements, and suggests that Cl reservoirs may have undergone limited processing since formation in the Solar Nebula. The examination of possible sources and sinks of HCl shows only limited pathways to short‐term efficient Cl fractionation and many plausible reservoirs of “light” Cl.
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About
- Item ORO ID
- 76163
- Item Type
- Journal Item
- ISSN
- 0094-8276
- Project Funding Details
-
Funded Project Name Project ID Funding Body ExoMars Trace Gas Orbiter PLS 2020-2023 ST/V002295/1 UK Space Agency (UKSA) Retrievals of martian aerosols and ozone from ExoMars NOMAD data ST/V005332/1 UK Space Agency (UKSA) Mars Surface/Atmosphere Interactions from Above and Below ST/S00145X/1 UK Space Agency (UKSA) - Keywords
- Exomars NOMAD; hydrogen chloride; isotopic ratio; Mars; planetary evolution
- Academic Unit or School
-
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Research Group
- ?? space ??
- Copyright Holders
- © 2021 American Geophysical Union. All Rights Reserved.
- Depositing User
- Manish Patel
CORE (COnnecting REpositories)
CORE (COnnecting REpositories)