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Comments on Large-Scale Biosphere on Mars: Interior Weather

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Large-Scale Biosphere on Mars: Interior Weather

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I've been researching the idea of spreading out vast sheets of aerogel across regions of Mars. This would theoretically have the effect of both warming whatever land is under the sheet - thus melting the permafrost and forming lakes - as well as blocking UV rays.

A dome of such material over a large enough parcel of land would mean that colonists wouldn't have to live underground. As long as they remained under the aerogel, their biosphere would simulate being on Earth, albeit with only 38% of our gravity.

Question: What volume within the domed area would be needed to produce its own weather system, including rain and/or fog? I'm envisioning an aerogel "roof" over the entirety of Galle Crater (215km diameter).

Thanks in advance!

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Doesn't make sense structurally (1 comment)
Doesn't make sense structurally
Olin Lathrop‭ wrote 10 months ago

Aerogel is structurally weak. Keep in mind that if you want simulate an Earth biosphere that humans don't need spacesuits to walk around in, then the pressure will be much higher than outside. Even at 10 PSI (about 2/3 of Earth atmospheric pressure at sea level), you still have enormous forces on the aerogel. Mars also has winds, so it's not all a simple steady upwards force on the dome.