Would be really interesting to have a qualitative description of where global ocean flows are increasing, if they are decreasing here? Or if in general, ocean circulation / transport is undergoing some change?
Or watching the video commented below, maybe it's the weakening that's happening because of the warming and freshening of arctic waters like around Greenland.
There isn't a "conservation of flow" principle for liquids, so there's no need to go looking for a flow increase somewhere else because this flow is decreasing.
My takeaway from a one year oceanography course is that ocean currents have more in common with biology than computing: they're complex, can change as the result of propagation of relatively small changes, and are inconceivable in scale.
Or watching the video commented below, maybe it's the weakening that's happening because of the warming and freshening of arctic waters like around Greenland.