remember, density only has an effect because of gravity....
That's why they have to spend a few million dollars to make a giant array to detect gravity waves. The scientists don't know that you can just stick your head out of the window.
EDIT:: No, I'm a dick. These ARE gravity waves, according to wikipedia. I was thinking of a gravitational wave.
misleading title is misleading
Those are just ripples in air-density, it has nothing to do with gravity....
I was about to write:NOT A GRAVITY WAVE! because this is NOT "a wave that is hypothesized to propagate gravity and to travel at the speed of light
wordnet.princeton.edu/perl/webwn" which is what I have always associated with that term. HOWEVER, I am surprised to learn that there is another definition for this term which indeed describes to my understanding what is happening in the video, "A wave created by the action of gravity on density variations in the stratified atmosphere. A generic classification for lee waves, mountains ...
YAY! the internet actually SAVED me from being a dick for once!
All this in a matter of minutes...
Well, this is not a gravity wave. The atmosphere is made up of gases that act like a fluid medium. Like the ocean, there are layers separated by density and temperature. What you have here is a wave phenomena... but caused by high winds and not gravity.
Gravity waves? Is that what these things are called? I was sure that gravity waves are these ripples in space/time that you need great big detectors to spot.
Nevertheless, this is an amazing meteorological phenomenon.
it's really cool, but I wish it wasn't called gravity waves. It's too easily confused with gravitational waves in general relativity.