Check out an Ocean Eddy off Krait Bay, Australia. Eddies form when a bend in the ocean current separates and makes a loop. In the Southern Hemisphere, cold water eddies rotate clockwise and warm water eddies rotate counterclockwise. The size of eddies and their rings vary as do their lifetimes—lasting between a month to over a year. Eddies are usually detected with ocean temperature and current instruments, but can also be detected by sight as in this image. GeoEye-1 .50-meter resolution collected 10 April 2009.
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