The Vertical Structure Of Trace Gases In The Atmosphere
Of Mars Revealed By Acs On Exomars Tgo.
Kevin S. Olsen, P. G. J. Irwin, Department Of Physics, University Of Oxford, Uk (Kevin.Olsen@Physics.Ox.Ac.Uk),
A. Fedorova, A. Trokhimovskiy, O. Korablev, M. Luginin, D. Belyaev, A. Patrakeev, A. Shakun, Space Research Institute (Iki), Moscow, Russia, F. LefèVre, F. Montmessin, L. Baggio, Laboratoire AtmosphèRes, Milieux,
Observations Spatiales (Latmos), Paris, France, J. Alday, Open University, Uk, F. Forget, E. Millour, A. Bierjon,
Laboratoire De MéTéOrologie Dynamique (Lmd), Paris, France, L. Montabone, Space Science Institute, Boulder,
Usa; Laboratoire De MéTéOrologie Dynamique (Lmd), Paris, France.

Introduction
The Exomars Trace Gas Orbiter (Tgo) Has Been Making High Resolution Spectroscopic Measurements Of The
Atmosphere Of Mars Since April 2018. By Mamo 2022,
It Will Have Acquired 4 Earth-Years Of Data, Which Will
Be Just Over Two Full Years On Mars. Observations Began
Just Before The Autumnal Equinox In Mars Year (My) 34,
We Observed The Global Dust Storm In 2018, Then Two Full
Perihelion And Aphelion Periods. Mamo Will Take Place
Over Solar Longitude (Ls ) 245◦ In My 36, Which Is Into
The Third Dusty Season Observed By Tgo.
While Observing The Dusty Season Of Mars, Observations Made Using The Atmospheric Chemistry Suite Midinfrared Channel (Acs Mir) Revealed The First Novel Trace
Gas Found During The Tgo Mission: Hydrogen Chloride