NASA Announces August 4 News Briefing On MRO Science Finding |
NASA Announces August 4 News Briefing On MRO Science Finding |
Aug 3 2011, 03:55 PM
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Newbie Group: Members Posts: 10 Joined: 20-April 05 Member No.: 293 |
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Aug 4 2011, 07:49 PM
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Member Group: Members Posts: 809 Joined: 3-June 04 From: Brittany, France Member No.: 79 |
That's weird CRISM does not see anything. They argue that flows are much smaller than the CRISM pixel scale (18m). That's true for a single flow, which width scales between 0.5 and 5m, but some HiRISE pictures show 60m*60m areas covered by this dark flows. So CRISM shoud see them. And a mixture of water and salt does not change anything : there is still a strong signature of water. I'm very skeptical...
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Aug 4 2011, 11:41 PM
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Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
That's weird CRISM does not see anything. They argue that flows are much smaller than the CRISM pixel scale (18m). That's true for a single flow, which width scales between 0.5 and 5m, but some HiRISE pictures show 60m*60m areas covered by this dark flows. So CRISM shoud see them. And a mixture of water and salt does not change anything : there is still a strong signature of water. I'm very skeptical... the water will boil off (evaporate) quickly under the low pressure. Suspect there would be some kind of evaporite (salt) left over. But for direct detection of water CRISM would almost need to catch it in the act. Will need to see the Science paper for more details. |
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