This is the key phrase. To buy into the global warming hysteria cult, you have to believe in the global climate models (GCM). That's how you get all of the various observations, records, and micro studies to coalesce into a prediction of future climate. One big problem here, the GCM did not predict this Arctic current occilation. Why, you ask? Because we don't know diddly squat about ocean current occilations, and even less about Arctic ones.
Most of the ocean current data that we have was collected by Royal Navy and merchant seamen in the Age of Sail when this information was important. After steamships became the fashion, this data was no longer routinely collected. This means that much of the data supporting the alogorithms in the GCM is over 100 years old.
The GCMs have been around for about 30 years. In my early days I helped collect some of the datasets that were used to build them. They were crap back then and are no doubt crap today. This is why the GCM's have failed to predict any climate or weather event since they first started to crank out predictions 30 years ago.
This is the flimsy thread that the whole global warming mania depends upon.
Wow, that’s a revealing story!