This session welcomes all presentations on Mars' interior and surface processes. The aim of this session is to bring together disciplines as various as geology, geomorphology, geophysics, mineralogy, glaciology, and chemistry. We welcome presentations on either present or past Mars processes, either pure Mars science or comparative planetology with the Earth, either observations or modeling or laboratory experiments (or any combination of those). New results on Mars science obtained from recent in situ and orbital measurements are particularly encouraged, as well as prospective science for the preparation of future missions to be exploring Mars (ExoMars, Rover 2020).

This session welcomes presentations about volatile and fluid flows on the Martian surface and subsurface. Hydrothermal fluid circulation in the Martian crust is among the natural processes characterized by the combined involvement of fluids, such as water and methane, so defining a potential set of environments prone to biosphere growth and flourish. Aqueous fluid migration affects a broad range of physical, chemical, mechanical and thermal properties of the upper crust and it is closely linked to the transport of mass, heat, nutrients and chemical species in hydrogeological systems. Thus, fluid flows are central in fields such as volcano-tectonic, deep-biosphere and water/ice cycle. Accordingly, participants are encouraged to apply for this session with contributions concerning fluid migration mechanisms, products and effects, volatile evolution from erosion to deposition, diagenesis and astrobiological potential, both on Mars and terrestrial analogue sites. Experimental and numerical modeling of fluid circulation processes and water-rock interaction are also welcome.

Mobile dust has a huge impact on the Martian climate. In the thin atmosphere, dust can modify temperatures by several tens of degrees and lead to a massive change in circulation strength, as well as providing condensation nuclei for cloud formation, while surface dust removal and deposition can produce substantial changes in global albedo patterns and (over longer timescales) polar layering. Yet many of the processes responsible for dust being raised from the surface and through the boundary layer, for the interaction of dust with the water and CO2 cycles, and for how dust storms develop and feed back on the circulation, are still not well understood. However, recent years have brought new theories on topics ranging from the thresholds for dust lifting to how dust phenomena operating on different spatio-temporal scales may be connected, and studies of the exceptionally well-observed 2018 global dust storm are sure to spur even more ideas.

This session solicits contributions on all aspects of Mars atmospheric dust phenomena, from lifting by dust devils to upper atmosphere impacts of global dust storms, investigated via the analysis of observations, laboratory and field experiments, and/or the use of numerical modeling. Contributions that demonstrate the application of Earth-based ideas and techniques to Mars, or that provide insight on dust lifting from an aeolian geology perspective, are particularly welcome. The session will consist of oral talks, both invited and contributed, and posters.

The Trace Gas Orbiter of the ExoMars programme in now in its science orbit since April 2018 and is producing exciting results, Mars Express and Curiosity are still going strong and Insight has just started its science mission. The ExoMars Rover and Surface Platform and NASA's 2020 Rover are expected to be launched in summer 2020. Indeed vibrant times for Mars research. This session is open for papers dealing with recent results from Mars missions, ground observations, supporting theory and modelling, as well as plans for upcoming missions in the near and intermediate future. Especially papers presenting investigations about the geology, geomorphology, thermophysics, local meteorology, rover trafficability, special in-orbit image acquisition campaigns, etc... of Oxia Planum and Jezero West are invited.