How important is CO2 to planetary habitability?

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3D Early Mars simulations • Mixed CO 2 / H 2 O atmosphere • Self-consistent water cycle, including surface exchange, precipitation, cloud and vapour radiative effects etc. • Pressure: 600 Pa to 2 bar • 32×32×15, 32×36 spatial & spectral resolution • Ice evolution algorithm: h ice + = h ice + dh ice /dt| 1 yr ×Δt step
Surface temperature vs. pressure CO2 CLOUDS IN BOTH CASES RED = DRY (PURE CO2) BLUE = H2O-SATURATED TROPOSPHERE, NO H2O CLOUDS Multiple-bar atmospheres unlikely due to constraints from atmospheric escape theory (e.g. Grott et al. 2011)
Page 1 and 2: How important is CO 2 to planetary
Page 3 and 4: Carbon dioxide defines the outer ed
Page 5 and 6: CO 2 clouds (1D studies) • Kastin
Page 7: Two outer edge planets: Mars and Gl
Page 11 and 12: Temperature-altitude correlation Ol
Page 13 and 14: Effects of diurnal / seasonal heati
Page 15 and 16: Gliese 581d simulations
Page 17 and 18: Effect of the close orbit • Glies
Page 19 and 20: So, CO 2 -rich case is potentially
Page 21 and 22: Hydrogen greenhouse warming I: Earl
Page 23 and 24: Hydrogen greenhouse warming I: Earl
Page 25: Conclusions • Advances in spectro

How important is CO2 to planetary habitability?

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