A question here, behaviour of water on Mars |
A question here, behaviour of water on Mars |
May 24 2007, 12:38 AM
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Junior Member Group: Members Posts: 58 Joined: 17-September 06 Member No.: 1150 |
A question here
There are signs that in the past there was liquid water on Mars. So lets assume thats true. Since the gravity on Mars is much lower than on Earth, so how does water (waves) behave on Mars compared to Earth? Someone did say, that waves would have been much higher but also much slower. Is this true? Does anyone have an animation where you can see a waive on Earth in comparsion to a wave on Mars? Thanks |
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May 25 2007, 03:41 PM
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
While there would be no really big tides on a Martian sea, there might be some significant effects from weather.
Storm surges caused by weather could temporarily (and dramatically) raise sea levels on Mars more than on Earth. (there was a random set of waves that topped 10 feet that hit Daytona Beach on a calm night many years ago. It trashed several cars parked on the sand. It was thought to have resulted from a storm far offshore that pushed a wall of water in front of the storm front. The wind speed matched the wave propogation speed nicely and the additive effect built up an impressive set of waves that persisted after the storm dissipated.) [For a really cool powerpoint presentation on Tsunamis vs. Rogue Waves: click here (Warning: long download) Also, low pressure centers can allow a water column to get sucked up (actually, it's due to "not being pushed down"). IIRC, on Earth a 100 mb (10%) drop seen in the center of a Hurricane can cause a water column to rise 8-10 feet. (This is only one of the factors of the devastating storm surge when hurricanes make landfall). Could a similar drop in a low pressure cell on Mars (10%) cause a similar surge? Would the lower gravity make it even more sensitive to pressure effects? (uh-oh, sounds like a lot of math will be needed to figure this out) -Mike -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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