On Investigating the Variation of the Radiation Dose in the Martian SubSurface due to the CO2 Ice Thickness

The radiation environment at the Martian surface and near sub-surface is strongly dominated by extra- Martian radiation sources. These external sources are in themselves variable and dependant on the solar cycle. To compound this, there is a seasonal dependance on what little shielding the surface is provided by the Martian CO2 cycle. The variation in the sub-surface radiation dose across seasons due to this cycle and the relation it has to the CO2 ice thickness has been modelled to give the variation with latitude and depth over time.