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dc.contributor.authorKorablev, O.
dc.contributor.authorOlsen, K.S.
dc.contributor.authorTrokhimovskiy, A.
dc.contributor.authorLefèvre, F.
dc.contributor.authorMontmessin, F.
dc.contributor.authorFedorova, A.A.
dc.contributor.authorToplis, M.J.
dc.contributor.authorAlday, J.
dc.contributor.authorBelyaev, D.A.
dc.contributor.authorPatrakeev, A.
dc.contributor.authorIgnatiev, N.I.
dc.contributor.authorShakun, A.V.
dc.contributor.authorGrigoriev, A.V.
dc.contributor.authorBaggio, L.
dc.contributor.authorAbdenour, I.
dc.contributor.authorLacombe, G.
dc.contributor.authorIvanov, Y.S.
dc.contributor.authorAoki, S.
dc.contributor.authorThomas, I.R.
dc.contributor.authorDaerden, F.
dc.contributor.authorRistic, B.
dc.contributor.authorErwin, J.T.
dc.contributor.authorPatel, M.
dc.contributor.authorBellucci, G.
dc.contributor.authorLopez-Moreno, J.-J.
dc.contributor.authorVandaele, A.C.
dc.contributor.editor
dc.date2021
dc.date.accessioned2021-02-11T12:09:59Z
dc.date.available2021-02-11T12:09:59Z
dc.identifier.urihttps://orfeo.kbr.be/handle/internal/7715
dc.descriptionA major quest in Mars’ exploration has been the hunt for atmospheric gases, potentially unveiling ongoing activity of geophysical or biological origin. Here, we report the first detection of a halogen gas, HCl, which could, in theory, originate from contemporary volcanic degassing or chlorine released from gas-solid reactions. Our detections made at ~3.2 to 3.8 μm with the Atmospheric Chemistry Suite and confirmed with Nadir and Occultation for Mars Discovery instruments onboard the ExoMars Trace Gas Orbiter, reveal widely distributed HCl in the 1- to 4-ppbv range, 20 times greater than previously reported upper limits. HCl increased during the 2018 global dust storm and declined soon after its end, pointing to the exchange between the dust and the atmosphere. Understanding the origin and variability of HCl shall constitute a major advance in our appraisal of martian geo- and photochemistry.
dc.languageeng
dc.titleTransient HCl in the atmosphere of Mars
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeOxia Planum
dc.subject.freeradiation
dc.subject.freeregolith
dc.subject.freeastrobiology
dc.subject.freehuman planetary exploration
dc.source.titleScience Advances
dc.source.volume7
dc.source.issue7
dc.source.pageeabe4386
Orfeo.peerreviewedYes
dc.identifier.doi10.1126/sciadv.abe4386


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