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Explanation for the Increase in High‐Altitude Water on Mars Observed by NOMAD During the 2018 Global Dust Storm

dc.contributor.authorNeary, L.
dc.contributor.authorDaerden, F.
dc.contributor.authorAoki, S.
dc.contributor.authorWhiteway, J.
dc.contributor.authorClancy, R.T.
dc.contributor.authorSmith, M.
dc.contributor.authorViscardy, S.
dc.contributor.authorErwin, J.T.
dc.contributor.authorThomas, I.R.
dc.contributor.authorVillanueva, G.
dc.contributor.authorLiuzzi, G.
dc.contributor.authorCrismani, M.
dc.contributor.authorWolff, M.
dc.contributor.authorLewis, S.R.
dc.contributor.authorHolmes, J.A.
dc.contributor.authorPatel, M.R.
dc.contributor.authorGiuranna, M.
dc.contributor.authorDepiesse, C.
dc.contributor.authorPiccialli, A.
dc.contributor.authorRobert, S.
dc.contributor.authorTrompet, L.
dc.contributor.authorWillame, Y.
dc.contributor.authorRistic, B.
dc.contributor.authorVandaele, A.C.
dc.date2020
dc.date.accessioned2020-04-02T11:32:26Z
dc.date.available2020-04-02T11:32:26Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/7499
dc.descriptionThe Nadir and Occultation for MArs Discovery (NOMAD) instrument on board ExoMars Trace Gas Orbiter measured a large increase in water vapor at altitudes in the range of 40–100 km during the 2018 global dust storm on Mars. Using a three‐dimensional general circulation model, we examine the mechanism responsible for the enhancement of water vapor in the upper atmosphere. Experiments with different prescribed vertical profiles of dust show that when more dust is present higher in the atmosphere, the temperature increases, and the amount of water ascending over the tropics is not limited by saturation until reaching heights of 70–100 km. The warmer temperatures allow more water to ascend to the mesosphere. Photochemical simulations show a strong increase in high‐altitude atomic hydrogen following the high‐altitude water vapor increase by a few days.
dc.languageeng
dc.titleExplanation for the Increase in High‐Altitude Water on Mars Observed by NOMAD During the 2018 Global Dust Storm
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeMars
dc.subject.freedust storm
dc.subject.freeMars Year 34
dc.subject.freeGCM modeling
dc.subject.freehydrogen escape
dc.source.titleGeophysical Research Letters
dc.source.volume47
dc.source.issue7
dc.source.pagee2019GL084354
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2019GL084354


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