Schematic map of the Atlantic ocean and its surface currents. The NBC rings are formed as the NBC retroflects towards the NECC. Inspired from.[1]
The North Brazil Current (NBC) retroflects north-eastwards and merges into the North Equatorial Counter Current (NECC).[2] The retroflection occurs in a seasonal pattern when there is strong retroflection from late summer to early winter (borreal fall). There is weakened or no retroflection during other times of the year. Just like in the Agulhas Current, the retroflection also sheds some eddies (which are referred to as the NBC rings) that make their way to the Caribbean Sea through the Lesser Antilles.[1]
^ abRichardson, P. L.; Hufford, G. E.; Limeburner, R.; Brown, W. S. (1994). "North Brazil Current retroflection eddies". Journal of Geophysical Research. 99 (C3): 5081. Bibcode:1994JGR....99.5081R. doi:10.1029/93JC03486. ISSN 0148-0227. S2CID 129308181.
^Metcalf, W. G.; Stalcup, M. C. (1967-10-15). "Origin of the Atlantic Equatorial Undercurrent". Journal of Geophysical Research. 72 (20): 4959–4975. Bibcode:1967JGR....72.4959M. doi:10.1029/jz072i020p04959. ISSN 0148-0227.
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