10 days above the triple point of water

Author Message
r lewis

PostPosted: November 4, 2012 12:09 AM 

Nobody seems to have noticed the REMS data has recorded 10 days in a row where the daytime high air temperature between 2-5 C and pressure aroudn 7 millibars. They even recorded a daily high of 7 C a few days later. That is above the triple point of water, in other words, water would be LIQUID at that temperature and pressure!

So we know there is water in the soil, can we continue to assume it is impossible for that water to enter a liquid phase under these condtions, or accept the fact that there shold be liquid water on mars right now. Doesn't that point to the real possibility of life on mars now?

Francisco J Oyarzun

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Reply: 1

PostPosted: November 4, 2012 8:32 PM 

For liquid water to exist on or near the surface of Mars,
you don't need above zero Celsius.
What you need is above -56 degrees Celsius,
plus good relative humidity, plus salts.
See e.g. [link] :

We found microbes in soil with 3,000 ppm salt concentrations.
That's like vodka.
That's so much salt, temperatures can drop to minus 56 degrees Celsius before there's frost bite.

Some places on Mars, like Valles Marineris,
have relative humidity so high, sometimes,
that you get not only frost but visible fog, e.g. [link]

But, of course, under current policy, NASA will not send
a life-seeking laboratory to such a place.

Thus far, it looks to me like Gusev was more humid than Glenelg.


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PostPosted: November 5, 2012 8:28 PM 


I agree and welcome back


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