I think the most interesting observation that can be made is about the 10c isotherm in July.
Who knew the Arctic ‘ocean’ (as defined by temperature) with all those islands in it was so oddly shaped in Summer? Big bulges that obviously show water flows outwards. So to the West it almost reaches 50N and at the ‘top’ (that isn’t North!) also 50N. A lot closer to the UK than I had first thought.