I would like to see how the heck they know exactly how currents were running 50, 100, 200, 500, 1000, 1000000 years ago throughout all the oceans and then how they know that today’s ocean current patterns diverge from some non-existent “norm” because of human activity. These people are raving lunatics.
Exactly, the idea that currents, and climate for that matter, are constantly changing, is always conveniently left out of AGW claims.