When cold 'polar' air passes from over Alaska then over Canada is it then called an Alaskan cold air mass?

Question

I mean the weatherpeople always tell us that the cold air that comes from north of the continental U.S. is called a 'Canadian' cold air mass, so what would the cold air that comes from west of Canadian air space be called?

Answer 1

Good question. The correct terminology is either polar air mass or arctic air mass if it originates over Canada or north of Canada over the Arctic circle.

Answer 2

I have heard some meteorologists refer to such air masses as "Siberian". Such air masses have been described as following the "polar express" which, when functioning, takes Siberian air and sends it first through Alaska and points north, then through Canada, and finally into the US lower 48. By the way, the coldest part of the northern hemisphere in winter is Siberia, not the north pole, surprisingly.
P.S. I heard that during the very cold winter of 76-77 when there was 3 inches of snow at Miami Beach, Florida, the governor of South Carolina threatened to declare war on Canada due to all of the hardship being caused by "Canadian air masses" that year.