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Relationships between HCl, H2O, aerosols, and temperature in the Martian atmosphere Part I: climatological outloo
  • +15
  • Kevin S. Olsen,
  • Anna A. Fedorova,
  • David M. Kass,
  • Armin Kleinböhl,
  • Alexander Trokhimovskiy,
  • Oleg I Korablev,
  • Franck Montmessin,
  • Franck Lefèvre,
  • Lucio Baggio,
  • Juan Alday,
  • Denis A. Belyaev,
  • James A. Holmes,
  • Jonathon P. Mason,
  • Paul M. Streeter,
  • Kylash Rajendran,
  • Manish R Patel,
  • Andrey Patrakeev,
  • Alexey Shakun
Kevin S. Olsen
Department of Physics, University of Oxford, Oxford, UK., School of Physical Sciences, The Open University, Milton Keynes, UK.
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Anna A. Fedorova
Space Research Institute (IKI), Moscow, Russia.
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David M. Kass
Jet Propulsion Laboratory (JPL), California Institute of Technology, Pasadena, USA.
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Armin Kleinböhl
Jet Propulsion Laboratory (JPL), California Institute of Technology, Pasadena, USA.
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Alexander Trokhimovskiy
Space Research Institute (IKI), Moscow, Russia.
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Oleg I Korablev
Space Research Institute (IKI), Moscow, Russia.
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Franck Montmessin
Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS/CNRS), Paris, France.
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Franck Lefèvre
Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS/CNRS), Paris, France.
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Lucio Baggio
Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS/CNRS), Paris, France.
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Juan Alday
School of Physical Sciences, The Open University, Milton Keynes, UK.
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Denis A. Belyaev
Space Research Institute (IKI), Moscow, Russia.
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James A. Holmes
School of Physical Sciences, The Open University, Milton Keynes, UK.
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Jonathon P. Mason
School of Physical Sciences, The Open University, Milton Keynes, UK.
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Paul M. Streeter
School of Physical Sciences, The Open University, Milton Keynes, UK.
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Kylash Rajendran
School of Physical Sciences, The Open University, Milton Keynes, UK.
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Manish R Patel
School of Physical Sciences, The Open University, Milton Keynes, UK.
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Andrey Patrakeev
Space Research Institute (IKI), Moscow, Russia.
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Alexey Shakun
Space Research Institute (IKI), Moscow, Russia.
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Abstract

Detecting trace gases such as hydrogen chloride (HCl) in Mars' atmosphere is among the primary objectives of the ExoMars Trace Gas Orbiter (TGO) mission. Terrestrially, HCl is closely associated with active volcanic activity, so its detection on Mars was expected to point to some form of active magmatism/outgassing. However, after its discovery using the mid-infrared channel of the TGO Atmospheric Chemistry Suite (ACS MIR), a clear seasonality was observed, beginning with a sudden increase in HCl