CO2 Cloud Greenhouse

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CO2 Cloud Greenhouse

• Liquid Water features by MOC
• Substantial CO2 in the early history of Mars
• Up to 1 bar of CO2 in the current polar cap
• Greenhouse effect of CO2 ice cloud makes the
  surface temperature reach the melting point of
  water
• Methane Clathrate?

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• Estimating the actual climatic effect of CO2
  clouds on early Mars will require the use of a
  full, three-dimensional general circulation
  model, replete with detailed parameterizations of
  cloud microphysics.
• -Mischna et al.
• We are working on a new Mars GCM, adopted from
  WRF (http//www.gps.caltech.edu/claire/WRF/)

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• 1 Mischna MA, Kasting JF, Pavlov A. Influence
  of carbon dioxide clouds on early Martian
  climate. Icarus 2000145546-554
• 2 Musselwhite D, Lunine JI. Alteration of
  volatile invertories by polar clathrate formation
  on Mars. Journal of Geophysical Research
  199510023301-23306