# Global 3D modelling of Martian CO2 clouds

Christophe Mathé, Anni Määttänen, Joachim Audouard, Constantino Listowski, Ehouarn Millour, Francois, Forget, Aymeric Spiga, Déborah Bardet, Lucas Teinturier, Lola Falletti, et al.

► To cite this version:

Christophe Mathé, Anni Määttänen, Joachim Audouard, Constantino Listowski, Ehouarn Millour, et al. Global 3D modelling of Martian CO2 clouds. European Planetary Science Congress. EPSC 2021, Sep 2021, Virtual Meeting, France. 10.5194/epsc2021-324. insu-03319697

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https://insu.hal.science/insu-03319697

Submitted on 12 Aug 2021

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Global 3D modelling of Martian CO2 clouds

**Christophe Mathé**<fnref n="1" />, Anni Määttänen<fnref n="1" />, Joachim Audouard<fnref n="1" />,<fnref n="2" />, Constantino Listowski<fnref n="1" />,<fnref n="3" />, Ehouarn Millour<fnref n="4" />, François Forget<fnref n="4" />, Aymeric Spiga<fnref n="4" />, Déborah Bardet<fnref n="4" />, Lucas Teinturier<fnref n="1" />, Lola Falletti<fnref n="1" />, Margaux Vals<fnref n="6" />, Francico González-Galindo<fnref n="5" />, and Franck Montmessin<fnref n="6" />

In the Martian atmosphere, carbon dioxide (CO2) clouds have been revealed by numerous instruments around Mars from the beginning of the XXI century. These observed clouds can be distinguished by two kinds involving different formation processes: those formed during the winter in polar regions located in the troposphere, and those formed during the Martian year at low- and mid-northern latitudes located in the mesosphere (Määttänen et al, 2013). Microphysical processes of formation of these clouds are still not fully understood. However, modeling studies revealed processes necessary for their formation: the requirement of waves that perturb the atmosphere leading to a temperature below the condensation of CO2 (transient planetary waves for tropospheric clouds (Kuroda et al., 20123), thermal tides (Gonzalez-Galindo et al., 2011) and gravity waves for mesospheric clouds (Spiga et al., 2012)). In the last decade, a state-of-the-art microphysical column (1D) model for CO2 clouds in a Martian atmosphere was developed at Laboratoire Atmosphères, Observations Spatiales (LATMOS) (Listowski et al., 2013, 2014). We use our full microphysical model of CO2 clouds formation to investigate the occurrence of these CO2 clouds by coupling it with the Global Climate Model (GCM) of the Laboratoire de Météorologie Dynamique (LMD) (Forget et al., 1999). Last modeling results on Martian CO2 clouds properties and their impacts on the atmosphere will be presented and be compared to observational data.

<footnote n="1">¹LATMOS/IPSL, Sorbonne Université, UVSQ Paris-Saclay, CNRS, Paris, France (christophe.mathe@latmos.ipsl.fr)</footnote>

<footnote n="2">²Currently at : WPO, Paris, France</footnote>

<footnote n="3">³DAM-Ile de France (DIF), Bruyères-le-Châtel, France</footnote>

<footnote n="4">⁴LMD/IPSL, Sorbonne Université, CNRS, Paris, France</footnote>

<footnote n="5">⁵Instituto de Astrofísica de Andalucía, CSIC, Granada, Spain</footnote>

<footnote n="6">⁶LATMOS/IPSL, UVSQ Université Paris-Saclay, Sorbonne Université, CNRS, Guyancourt, France</footnote>