re: Less water in Mars atmosphere
We have discussed this. Observations of stratospheric clouds on Earth have shown liquid water occurs in clouds down to -80 C. And experimental studies suggest it might be possible down even to -140 C:
Space Sciences
Supercooled liquid water water clouds.
Posted by Robert Clark on 12/8/2007 10:08:40 AM
In Reply to: Less water in Mars' clouds posted by Socrates II on 12/6/2007 5:41:07 PM
http://habitablezone.com/space/messages/492503.html
Also low lying equatorial clouds on Mars would be at temperatures much higher than -100 C.
Bob Clark