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 5 2011, 01:13 AM
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Senior Member Group: Members Posts: 1592 Joined: 14-October 05 From: Vermont Member No.: 530 |
Amusingly, it's similar images of water that make me wonder if the albedo changes simply have to do with the clumpiness of the dust in the streaks. There's activity in snowpack called either sloughing/sluffing. Basically by altering only the texture of the snow, it creates streaks like the ones found in the dust on Mars:
I guess this sort of thing is more common with SAR... but you can see it in plain old visible light. The whole slope is bright white snow. Up close the color of the sluffs is no different. They're just reflecting the sky back to the camera differently. Like snow, the dust probably falls in dry and sparsely packed, and clumps up more when something starts it rolling. I wonder if the streaks are just clumpier dust on airfall dust. They do need a trigger, though. That could be a tiny bit of water starting a basically dry sluff. |
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