crumbles:

scienceisbeauty:

A rapidly spinning, dense fluid has a lower density (orange) fluid poured onto it, at the center. This forms a buoyant lens whose lower interface is sloping relative to equipotential surfaces (the equipotentials are identical paraboloids, like the free surface when the fluid is totally spun up). {Note that the free surface of the fluid is just above the colored region. This is a strong optical lens, making secondary images above.} This symmetric eddy will continue to spin, relative to the underlying fluid, for many hours, until its available potential energy is used up.

 Source: GEOSTROPHIC ADJUSTMENT AND GEOSTROPHIC FLOW, UW School of Oceanography

(ho un debole per la roba geostrofica)

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    this absolute eye candy, but it has...great physics explanation behind it

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