Thermal Structure And Aerosol Content Of The Martian Atmosphere From Tirvim-Acs Onboard Tgo : An Overview
S. Guerlet, S. Fan, F. Forget, E. Millour, Laboratoire De Météorologie Dynamique/Ipsl, Sorbonne Université, Cnrs, Paris, France (Sandrine.Guerlet@Lmd.Ipsl.Fr), N. Ignatiev, P. Vlasov, A. Shakun, A. Trokhimovskiy, Oleg Korablev, Iki, Moscou, Russia, A. Grigoriev, Anu, Australia And F. Montmessin, Latmos/
Ipsl, France.

Introduction:
Between March 2018 And December 2019, Millions Of Spectra Of Mars' Surface And Atmosphere
Thermal Emission Have Been Recorded In Nadir Geometry By Tirvim/Acs, A Spectrometer Onboard The
Exomars Trace Gas Orbiter (Tgo). From This
Wealth Of Data, We Characterized In Detail The Thermal
Structure And Aerosol Content In The Martian Lower Atmosphere At A Great Variety Of Local Times. Indeed,
Tgo’S Orbit Design Is Such That The Local Time Of
Tirvim Nadir Observations Drifted By 13 Minutes
Earlier Each Sol. After 54 Sols, A Full Coverage Of The
Daily Cycle Was Achieved Along With Excellent Longitudinal And Latitudinal Coverage (Up To 74° Latitude
Due To Tgo’S Inclination). This Coverage Allowed Us
To Decompose Thermal Tides Components At Different
Seasons, To Study The Impact Of The Global Dust
Event Of My34 On The Atmospheric And Surface Temperature, And To Investigate The Distribution Of Dust
And Water Ice Cloud Optical Depths. In This Abstract,
We Review Some Of The Main Results Obtained From