You said:

The atmosphere of Mars is WAY too dry for that scenario - just the shallow brine would totally saturate the atmosphere through diffusion. Then you have to look at how the brine would be restored?

Where can I find information on the "dryness", "pressure" and "temperature" of the atmosphere of Mars?
I found some information on "water clouds" or ice clouds if you will; would they not constitute some form of "moisture"?
As I understand it, these "clouds" appear in certain areas, they move and then disappear.
Such phenomenon suggests to me that the "moisture" somehow evaporates or sublimes from the surface and is transferred from one place to another by wind currents.

I'm just wondering if your information on the atmospheric pressure and temperature range at the surface of Mars is inaccurate.

If you persist in believing only your eyes and your instincts, you will never understand Mars.

If I can not trust my eyes or my brain in deciphering the information that the instruments send to us, then how am I ever supposed to understand what is going on over there?