And yet overwhelming evidence shows ocean currents are responsible for abrupt warming climate changes and cooling climate changes. The exact same type of abrupt climate changes seen at the transition from interglacial periods to glacial periods.Have you ever noticed that when Trump doubles down on one of his idiotic moves, it is taken as evidence that he's even stupider than thought? I have never said that ocean circulation doesn't change over time. I have never said that changes in ocean circulation couldn't affect climate, particularly regionally. I'm saying that changes in ocean circulation are NOT responsible for the glacial-interglacial cycle nor are they responsible for the warming observed over the past 150 years. That no one has dedicated a study to refuting your contention is simply prima facie evidence that your contention has never been considered a hypothesis worthy of the least pursuit.
So if you believe ocean circulation can affect climate you must believe ocean currents can be responsible for warming and cooling trends.
Changes in heat transfer to the Arctic from the Atlantic have global implications. If the Arctic is glaciating the planet is cooling. If the Arctic is deglaciating the planet is warming. No other REGIONAL changes have global implications other than the Arctic.