This is the Atlantic equatorial current. It is now hitting the nose of South America. A little splinter of warm water heads to the south. This is very unstable. Should the current move down a little, then all the hot water goes south.
What I just realized is the the Pacific is just as unstable.
Who would have thought that plate tectonics has such a sense of humour, as to put two big noses in the prow for the current. A little push and we really are in a mini-ice age.