Whatever mechanism there is
that causes arctic air to come south, happens every year.
Not exact matches
The making of these devastatingly powerful storms is
caused by a low pressure
air system moving northbound into the Gulf of Alaska while in the zone between, the northern
arctic air and subtropical
air combine to create a frontal wave as the system begins to move in a south eastward direction toward Vancouver Island.
Regarding your citing decade - old papers pointing out that the proximate
cause of the loss of
arctic ice isn't solely due to warming
air temps in the
arctic, but rather warm water incursion, etc, well, yes, that's the mainstream view and isn't controversial.
I would say that's weather not climate change but I already got the lecture on how global warming
causes freezing in the prairies by disrupting wind patterns so more cold
air gets drawn down from the
arctic warming it more so ice melts more, or some such folderol.
Recent intrusions of cold
arctic air into the continents may be
caused by aberrant behavior of the polar vortex.
Depending on how far east winter storm tracks travel up the east coast, the battle line between cold
arctic air masses to the west and warm Atlantic
air to the east
causes significant temperature changes.