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Some valleys and other depressions on Mars are known of a frozen water fog, possibly precipitating as crystals.[1] What about collecting the ice directly from the atmosphere?
The water collected would likely be fresh, and, given sufficient data on temperature and fog density, the whole process might possibly be well-tested ahead.
[1] D. Mohlmann et al.: Fog phenomena on Mars. Planetary and Space Science, 2009.
These magnetic fields tend to be a high altitude locations. We found a location that satisfies other criteria: flat/smooth, near equator, low altitude, water. That was hard enough, and the water is in doubt. Yet another criteria could eliminate any solution.
Generally, yes. Although there are exceptions, like ~ 165E 15S, where the magnetic field is strong, the altitude is around -3km, and flat crater basins exist. It is not at the equator, though, what might be a problem. Summers are even hotter there than on the equator, ~25 Celsius vs 5, but winters colder, -35 vs -15. No idea about water there, but sighted atmospheric phenomena have been observed nearby.
I have seen many posts on this forum about Mars having no magnetosphere. Mars has one, albeit it is very different from that on Earth.
http://mepag.nasa.gov/topten.cfm?topten=5
"Mars Global Surveyor discovered and mapped intense magnetization in the Martian crust."
http://science1.nasa.gov/science-news/s … st31jan_1/
"Locally, the magnetic fields arch over the surface like umbrellas, hundreds of km high. "If you were standing on Mars in one of these areas," says Mitchell, "you would measure a magnetic field about as strong as Earth's -- a few tenths of a gauss."
"Places where magnetic umbrellas deflect the solar wind are also spots where the ionosphere is retained high above the surface of the planet."
Is the latter quote implying, that a vertical pillar of the atmosphere would be heavier in total at some regions? Ionosphere has low density, would not the difference be negligible?
EDIT: I have found a thread on these forums, that has already discussed some aspects of the topic of crustal magnetosphere: http://www.newmars.com/forums/viewtopic.php?id=6824.
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