Wet Mars

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PostPosted: March 22, 2006 3:54 AM 

Some newcomers might have missed this article from the Europeans about atmospheric water on Mars:


and the discussion which followed it:


But I figured, “ Hey, things are pretty slow on the Forum right now…”


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PostPosted: May 17, 2006 6:50 PM 

contrast / brightness animation to highlight Meirdiani clouds:

Another one here.

The low clouds on the horizon are particularly interesting in the second animation.

Note: you must view the original size to see the animation:


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PostPosted: May 22, 2006 8:29 PM 

This article seems to confirm the association between "ice fog" and presence of liquid water. As I mentioned before I have never seen it form atop pure snow or ice.

There seems to be a lack of detailed analysis of ice fog on the net.

a1call Author Profile Page

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PostPosted: July 13, 2006 11:00 PM 

Huge Frozen Sea Discovered On Mars

Kye Goodwin

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PostPosted: July 14, 2006 1:19 AM 

a1call, Yes, that story has been around this blog for a year or two now, but is worth revisiting. In this case catastrophic channeling and this huge ponded sea are thought to have been created quite recently. This author says 5 million years ago. I think I have seen other estimates that this lake could be up to 100 million years old, but that is still yesterday compared with the 3.8 billion years since the hypothetical warm-wet Mars might have existed.


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PostPosted: July 14, 2006 3:06 AM 

I read the article from a1 and it sounded very familiar.
Here is what it reminded me of

a1call Author Profile Page

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PostPosted: September 17, 2006 11:33 AM 

Mars probe to launch radar rod to spot buried water
“Despite the frigid surface temperatures of Mars, it is thought to have a hot interior like the Earth. Some of this heat could make its way towards the surface to keep pockets of subsurface water warm enough to stay liquid,”

Henry Author Profile Page

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PostPosted: October 25, 2006 4:51 AM 

From the 2006 Squires paper Mineralogy at Meridiani Planum, at


Using silica sand (density 2.2 grams/cc), one cubic yard of Meridiani sand would weigh about 1682 kilograms on Earth. At a mass percent weight of 5.5% water, this amount of Meridiani sand would contain 92 kilograms of water, or 92 liters, or 24.4 US gallons.

Henry Author Profile Page

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PostPosted: October 25, 2006 3:20 PM 

Please, NASA/JPL: repeat these measurements at Victoria !



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PostPosted: October 16, 2012 1:39 PM 

I'm surprised that there was ever any question as to whether or not Mars is covered by water. They have determined that all the water on earth originated from the asteroid belt. [link]
So for Mars not to have the same ratio of water to planet diameter would mean that Mars has some sort of asteroid shield. Mars is also closer to the asteroid belt that is supposed to be responsible for the water on earth.

But then again lots believe in an expanding universe. Just goes to show you that what you see is not always what you get.

John Henry Dough

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PostPosted: November 10, 2012 8:27 AM 


credit to
glennwsmith at USMF

Marsisimportant, thanks for adding the primeval collision to the overall picture -- you and Dburt have covered all the important bases, and in doing so, you have clarified for me what I was hoping to do with my original post, which was to paint a picture -- at which I will now, thanks to the infinite patience of Doug Ellison and all you other UMSF members, take another whack. To wit: I have been looking at the global pictures of Mars for some years now, and I have never been able to make sense out of what I am seeing. Yes, it is Earth's sister planet, but it just hasn't made any sense to me. But suddenly -- seeing the Hirise photo of a recent meteor strike on the Northern plains throwing out rays of ice -- it has all become clear. Imagine Earth at the Pangea stage with its seas frozen, and the entire planet covered with a thin layer of dust -- it would look very much like Mars today (allowing for the fact that the dust covering Mars is rich in iron oxide). I hope I am not beating a dead horse, I am just trying to explain my eureka moment.


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PostPosted: November 19, 2012 4:09 PM 




Ph.D. thesis discusses geologically recent liquid water on Mars.

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