lifetime, velocity, etc. are well documented. The rings are recorded using surface drifters, satellite observations of altimetry and color scanners. They are also known to be the largest and lowest-latitude rings that originate from any Western Boundary Current.

Physical properties

NBC rings are characterised by a partly isolated warm-core that can be as large as 450 km of diameter which turns clockwise with an azimuthal speed around 1 m/s. The maximum speed of propagation

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