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Unformatted text preview: If the ratio of out gassed N to CO2 was the same as Earths, then the original Mars atm was about 2 bars Now southern winter. Cold.average -20C Dry.no standing surface water Very dusty Thin atmosphere 6 millibars at surface About as dense as the middle of Earths stratosphere (~25 km altitude) No protection from hard radiation About of the atmosphere condenses on the South polar cap during Liquid water could exist temporarily with todays temperatures and air pressuresin a flash flood! Underground water seeps out to form erosion gullies these gullies were observed on a crater wall at their size, sandstorms would cover them in few million yrs such floods have occurred within the last few million years Or in the last few years. ....
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- Spring '08