"Eric Chomko" skrev i en meddelelse
...
Pedro Rosa ) wrote:

snip

: Thermodynamics you know? Now where liquid water may exist in Mars?
: Pure liquid water NOWHERE as the pressure is always too low for
: condensation and the only phases that may exist there are frozen like
: rock or gaseous.

Gaseous? Exactly how? Explain using Martian pressure and temperatures how
water vapor exists there. You are eluding to clouds here.

I'll take that by vapor you mean condensed water or ice particles in the
air, like a cloud?
I believe the atmosphere holds 0,03% H2O-gas (don't whip me on details) The
maximum contents of H2O-gas is dependant on temperature (dewpoint
temperature). If H2O-gas is evaporated/sublimed during day when temperature
and dewpoint is 'high', it follows that it may condense at night to ice-dew
or to ice-crystals in a clouds.

Carsten