Yana Usdi

Since people liked the last one I'll toss out one other for the night since I know where to find it offhand. I thought it was an interesting look at something we can't really see in real time.

This is a time-lapse of an atmospheric gravity wave taken by the Tama, Iowa KCCI-TV webcam on 6 May 2007. Gravity waves form when buoyancy pushes air up, and gravity pulls it back down. A quick description of what we're seeing taken in excerpts from Wikipedia, I'll link the page so you can read it in full if you'd like.

In fluid dynamics, gravity waves are waves generated in a fluid medium or at the interface between two media (e.g. the atmosphere or ocean) which has the restoring force of gravity or buoyancy...

...Since the fluid is a continuous medium, a traveling disturbance will result. In the earth's atmosphere, gravity waves are important for transferring momentum from the troposphere to the mesosphere. Gravity waves are generated in the troposphere by frontal systems or by airflow over mountains. At first waves propagate through the atmosphere without affecting its mean velocity. But as the waves reach more rarefied air at higher altitudes, their amplitude increases, and nonlinear effects cause the waves to break, transferring their momentum to the mean flow.

This process plays a key role in controlling the dynamics of the middle atmosphere.

Gravity wave - Wikipedia, the free encyclopedia

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Vicki

Keep them coming!

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ctwalrus

cool

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ohganja420

this is so cool. i love how there are so many amazing things going on like this all the time and we don't even know it.

Monsoon77

That shit is bad ass

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rich420

Whoa thats a trip.

ADIDAS

Incredible. I knew nothing of this.

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