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First detection and thermal characterization of terminator CO2 ice clouds with ExoMars/NOMAD

dc.contributor.authorLiuzzi, G.
dc.contributor.authorVillanueva, G.L.
dc.contributor.authorTrompet, L.
dc.contributor.authorCrismani, M.M. J.
dc.contributor.authorPiccialli, A.
dc.contributor.authorAoki, S.
dc.contributor.authorLopez-Valverde, M.A.
dc.contributor.authorStolzenbach, A.
dc.contributor.authorDaerden, F.
dc.contributor.authorNeary, L.
dc.contributor.authorSmith, M.D.
dc.contributor.authorPatel, M.R.
dc.contributor.authorLewis, S.R.
dc.contributor.authorClancy, R.T.
dc.contributor.authorThomas, I.R.
dc.contributor.authorRistic, B.
dc.contributor.authorBellucci, G.
dc.contributor.authorLopez-Moreno, J.-J.
dc.contributor.authorVandaele, A.C.
dc.date2021
dc.date.accessioned2021-11-23T14:44:24Z
dc.date.available2021-11-23T14:44:24Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/8111
dc.descriptionWe present observations of terminator CO2 ice clouds events in three groups: Equatorial dawn, Equatorial dusk (both between 20°S and 20°N) and Southern midlatitudes at dawn (45°S and 55°S east of Hellas Basin) with ESA ExoMars Trace Gas Orbiter's Nadir and Occultation for MArs Discovery instrument. CO2 ice abundance is retrieved simultaneously with water ice, dust, and particle sizes, and rotational temperature and CO2 column profiles in 16 of 26 cases. Small particles (<0.5 μm) prevail at dusk, while water ice likely provides most source nuclei at dawn. Clouds east of Hellas are found to be dominantly nucleated on surface-lifted dust. CO2 ice is sometimes detected in unsaturated air together with dust nuclei at dawn, suggesting ongoing sublimation. Depending on latitude and local time, the interplay between particle precipitation and the lifetime of temperature minima (i.e., cold pockets) determines CO2 ice properties.
dc.languageeng
dc.titleFirst detection and thermal characterization of terminator CO2 ice clouds with ExoMars/NOMAD
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeMars
dc.subject.freeCO2 ice clouds
dc.subject.freeNOMAD
dc.subject.freeatmosphere
dc.subject.freeaerosols
dc.subject.freetemperature
dc.source.titleGeophysical Research Letters
dc.source.volume48
dc.source.issue22
dc.source.pagee2021GL095895
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2021GL095895
dc.identifier.scopus


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