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Observed seasonal changes in Martian hydrogen chloride explained by heterogeneous chemistry

Montmessin, Franck; Trokhimovskiy, Alexander; Korablev, Oleg +7 more

Aims: The aim of this work is to show that the seasonal changes and vertical distribution profiles of hydrogen chloride (HCl) on Mars, as observed by the ExoMars Trace Gas Orbiter, are consistent with the production of gas-phase chlorine atoms from airborne dust and a subsequent rapid uptake of HCl onto water ice particles.
Methods: A 1D…

Climatology of gravity wave activity based on two Martian years from ACS/TGO observations

Montmessin, Franck; Starichenko, Ekaterina D.; Belyaev, Denis A. +6 more

Context. Gravity waves redistribute energy and momentum between the lower and upper atmosphere, thus providing vertical coupling between layers, and they affect the state, dynamics, and variability of the upper atmosphere. The statistics of gravity wave activity on Mars is poorly explored but is required in order to characterize the atmospheric ci…