The two fjords Ísafjarðardjúp and Eyjafjörður are twin fjords. The shape is identical and their openings are on the same latitude.
It can be shown how the fjords have rotate around identical points 3° of longitude apart.
The direction of the vectors from the point of rotation is the same as the calculated value of convection cells at 66°N, that is N33°E and N33°W. The rotation angle of Eyjafjörður compared to Ísafjarðardjúp is 22°, the same as the difference between equatorial and polar convection rolls alignment at the latitude.
A coincidence of this degree of mathematical coherence is virtually impossible.