Ancient Ocean that covered 1/3 of Mars with Water, A new study conducted by University of Colorado at Boulder scientists. |
Ancient Ocean that covered 1/3 of Mars with Water, A new study conducted by University of Colorado at Boulder scientists. |
Guest_Bobby_* |
Jun 15 2010, 12:33 AM
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I found this article about Mars being covered with Water and found it interesting.
June 13, 2010 Here is the article: http://www.colorado.edu/news/r/f9b2e812247...b0735f7098.html |
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Oct 21 2010, 02:21 PM
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Member Group: Members Posts: 202 Joined: 9-September 08 Member No.: 4334 |
If Mars ever had an Earth-density atmosphere, though, it would have had far more CO2 and thus a stronger greenhouse effect. Earth's atmosphere is unstable, maintained that way by life. Before plants, Earth had much more CO2 and less O2.
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Oct 23 2010, 07:29 PM
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Junior Member Group: Members Posts: 59 Joined: 12-November 09 Member No.: 5039 |
If Mars ever had an Earth-density atmosphere, though, it would have had far more CO2 and thus a stronger greenhouse effect. Earth's atmosphere is unstable, maintained that way by life. Before plants, Earth had much more CO2 and less O2. I believe the gist of AndyG's post is that even thick CO2 atmosphere doesn't raise temperature enough to make liquid ocean possible. |
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Oct 23 2010, 09:29 PM
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
even thick CO2 atmosphere doesn't raise temperature enough to make liquid ocean possible. The pressure required to maintain the liquid state doesn't have to depend on a thick atmosphere; it can come from the weight of 'sea ice'. Most of the water oceans in the solar system have such caps, but I think any ancient martian ocean would have had a much thinner cap than that of Europa or the other galileans, more like 'snowball Earth'. |
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