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Global Distribution and Seasonality of Martian Atmospheric HCl Explained Through Heterogeneous Chemistry
Trokhimovskiy, Alexander; Korablev, Oleg; Olsen, Kevin S. +4 more
Recent observations from the ExoMars Trace Gas Orbiter (TGO) have revealed the presence of hydrogen chloride (HCl) in the martian atmosphere. HCl shows strong seasonality, primarily appearing during Mars' perihelion period before decreasing faster than projected from photolysis and gas-phase chemistry. HCl profiles also display local anti-correlat…
A Case Study on the Impact of Interplanetary Coronal Mass Ejection on the Martian O(1S) 557.7 nm Dayglow Emission Using ExoMars TGO/NOMAD-UVIS Observations: First Results
Vandaele, Ann Carine; Gérard, Jean-Claude; Thomas, Ian R. +6 more
We report, for the first time, the impact of interplanetary coronal mass ejections (ICME) on the recently discovered O(1S) 557.7 nm dayglow emission in the Martian atmosphere. While there are a few studies on the seasonal variation of 557.7 nm dayglow emission available in the literature, the impact of ICME has not been investigated so …