Huge Ocean 'Frisbees' Spin Off Brazil's Coast
Posted on March 22, 2011 at 08:36:41 am
This portion travels northwest with a clockwise rotation, moving through the ocean like a Frisbee™ travels through air.
These current rings have been known to exist for decades, but knowledge of their basic properties such as size, speed, depth, and rotation velocity has been limited. Drawing on current profiles from both shipboard and stationary instruments, University of Miami researchers Guilherme Castelão and Bill Johns describe the basic properties of ten rings sampled between 1998 and 2000. The authors find that the rings are best described as solid, clockwise-rotating parcels of water enclosed within a band of lower-speed water that tends to protect them from the surrounding environment.
-ADVERTISEMENT-Overall, this research has established that the NBC rings seem to be bigger, faster, and taller than previous observations suggested.