Episodic warming of early Mars by punctuated volcanism John San Filippo.

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Presentation transcript:

Episodic warming of early Mars by punctuated volcanism John San Filippo

Solar Luminosity The Sun has gotten brighter since it’s formation Lots of evidence points towards liquid water on mars How?

Physics of planetary atmospheres Solar Energy Atmospheric Albedo Surface Albedo Greenhouse Gasses

Geomorphic Evidence of Water on Mars

Basaltic Extrusion

Sulfur Emissions leading to warming

Sulfate formation/deposit After periods of eruption, mars cooled again Sulfate formation In subsequent warmings, collected in low laying areas Only see this in subsolar latitudes

Methods Model calculated Sulfur effects at 50 layers Followed H 2 SO 4 from birth to deposition Also included atmospheric and outgassing fluctuations

Wrap/up questions Dependent on scattering and dust to prevent net cooling How does new water discovery change this model?

sources J. varekamp GCC spring Ignasi Ribas (2009). The Sun and stars as the primary energy input in planetary atmospheres. Proceedings of the International Astronomical Union, 5, pp doi: /S

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