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Communication Dans Un Congrès Année : 2019

Vertical profiles of water vapour isotopes in the Martian atmosphere using ExoMars TGO/ACS

Résumé

The Atmospheric Chemistry Suite (ACS) on board ESA-Roscosmos ExoMars Trace Gas Orbiter started routine science operations in March 2018. The mid-infrared channel (MIR), operating in the 2.2-4.4 μm range, allows the detection of trace gases in the Martian atmosphere, as well as the simultaneous profiling of several species in solar occultation observations. We report retrievals in the 2.51 - 2.64 μm spectral region which allow simultaneous measurement, for the first time, of vertical profiles of H216O, H218O, H217O and HD16O. The spectral region also includes CO2 spectral lines which allow temperature and pressure retrieval through the assumption of hydrostatic equilibrium. Monitoring of this spectral region with ACS-MIR will provide a better understanding of the isotopic fractionation of water vapour, its local and seasonal variability, and its fractionation in condensation/evaporation processes.
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Dates et versions

insu-04487119 , version 1 (03-03-2024)

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Juan Alday, Colin Wilson, Patrick Irwin, Kevin Olsen, Lucio Baggio, et al.. Vertical profiles of water vapour isotopes in the Martian atmosphere using ExoMars TGO/ACS. 21st EGU General Assembly, EGU2019, Apr 2019, Vienna, Austria. pp.id.14788. ⟨insu-04487119⟩
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