Comments on: Study: increase in seasonal Martian streaks after 2018 global dust storm suggests dust not water is their cause https://behindtheblack.com/behind-the-black/points-of-information/study-increase-in-seasonal-martian-streaks-after-2018-global-dust-storm-suggests-dust-not-water-is-their-cause/ Wed, 28 Apr 2021 19:57:16 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: Robert Zimmerman https://behindtheblack.com/behind-the-black/points-of-information/study-increase-in-seasonal-martian-streaks-after-2018-global-dust-storm-suggests-dust-not-water-is-their-cause/#comment-1127774 Wed, 28 Apr 2021 19:57:16 +0000 https://behindtheblack.com/?p=75198#comment-1127774 In reply to Lee Stevenson.

Lee: Read the paper I link to. They go into details, but the gist is that if you have piled up enough dust it will exceed the angle of repose which will cause a grainflow downhill. There is a lot more to it, and many unknowns that make this hypothesis as yet incomplete, but that’s the central concept.

]]> By: Lee Stevenson https://behindtheblack.com/behind-the-black/points-of-information/study-increase-in-seasonal-martian-streaks-after-2018-global-dust-storm-suggests-dust-not-water-is-their-cause/#comment-1127773 Wed, 28 Apr 2021 19:50:55 +0000 https://behindtheblack.com/?p=75198#comment-1127773 I’ve been having a long think about this, ( unusual for me, I know ;-) , but the “dark streaks” tend to occur at pretty much the same latitude in the same areas, I am of the mind that perhaps the dust is darker than where it lands, so enables more melt? Or sublimation, or something else? I can’t think of any other reason why a dust storm could facilitate anything that would occur at such a regular level in the slopes of Mars… It’s certainly not random. Any thoughts?

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