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hey call me Thor coz im bored but aint we already got a Mars water thread?
do we really need a mars wind thread?!!
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can start a Mars Robin Reliant thread then?!
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Posted: |
Sep 30, 2015 - 5:29 AM
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By: |
Metryq
(Member)
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Solium wrote:The wind, even at 60 mph (97 km/hr), would seem more like a breeze, because the density of Martian air is only 1 percent that of Earth.
Correct. Even NASA admits that the Martian atmosphere is barely sufficient to whisk sand and dust aloft, let alone suspend it for months. Research teams in the deserts of Nevada and Arizona have recorded the intense electrical and magnetic fields of terrestrial "dust devils":
http://www.nasa.gov/home/hqnews/2004/apr/HQ_04131_mars_dust.html
The article linked above attributes the build-up of charge to triboelectric effects (that's friction, like rubbing a party balloon against your hair to make it stick to a wall) and rising warm air. Frankly, I doubt rising warm air has much to do with Martian dust devils, and others propose currents from the Sun (the so-called Solar "wind") as the primary driver. Doubtful? Mars has a paltry atmosphere, yet enough charge is coming down to create Martian auroras. With so little atmosphere, much of that charge gets directly to the ground, without the intermediate "air capacitor" effects seen on Earth.
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