[P-PS08] Mars and Mars system: results from a broad spectrum of Mars studies and aspects for future missions

[PPS08-06] Observations of the Martian atmosphere by NOMAD on ExoMars Trace Gas Orbiter

★Invited Papers

*Ann Carine Vandaele¹, Frank Daerden¹, Ian R. Thomas¹, Shohei Aoki^1,2, Cédric Depiesse¹, Justin T. Erwin¹, Lori Neary¹, Bojan Ristic¹, Yannick Willame¹, Jean-Claude Gérard², Giuliano Liuzzi³, Geronimo Villanueva³, Jon Mason⁴, Manish R. Patel⁴, Francesca Altieri⁵, Giancarlo Bellucci⁵, Miguel Lopez-Valverde⁶, Jose-Juan Lopez-Moreno⁶ (1.Royal Belgian Institute for Space Aeronomy, Brussels, Belgium, 2.Laboratory for Planetary and Atmospheric Physics, University Liège, Belgium, 3.NASA Goddard Space Flight Center, Greenbelt, MD, USA, 4.School of Physical Sciences, The Open University, Milton Keynes, UK, 5.Istituto di Astrofisica e Planetologia Spaziali (IAPS/INAF), Rome, Italy, 6.Instituto de Astrofisica de Andalucia (IAA/CSIC), Granada, Spain )

Keywords:Mars exploration , Atmosphere composition, ESA mission

The NOMAD (“Nadir and Occultation for MArs Discovery”) spectrometer suite on board the ExoMars Trace Gas Orbiter has been designed to investigate the composition of Mars' atmosphere, with a particular focus on trace gases, clouds and dust probing the ultraviolet and infrared regions covering large parts of the 0.2-4.3 µm spectral range [1,2].

Since its arrival at Mars in April 2018, NOMAD performed solar occultation, nadir and limb observations dedicated to the determination of the composition and structure of the atmosphere. Here we report on the different discoveries highlighted by the instrument: investigation of the 2018 Global dust storm and its impact on the water uplifting and escape, its impact on temperature increases within the atmosphere as inferred by GCM modeling and observations, the dust and ice clouds distribution during the event, ozone measurements, dayglow observations and in general advances in the analysis of the spectra recorded by the three channels of NOMAD.

References

[1] Vandaele, A.C., et al., 2015. Planet. Space Sci. 119, 233-249.

[2] Vandaele et al., 2018. Space Sci. Rev., 214:80, doi.org/10.1007/s11214-11018-10517-11212.