Eastern Canada isn’t a great example because of the prevailing winds. Even without the gulf stream, Europe would have less temperature variation than Eastern Canada because both have prevailing southwesterly winds. The Atlantic serves as a heat sink that dampens the extremes of winter and summer, so Europe would continue have less extreme temperatures than Eastern Canada - including less extreme cold.
Canada’s east coast is more similar to Hokkaido and Kamchatka. A better comparison for Europe would be Canada’s west coast. Paris would have similar weather to Vancouver, Oslo would be similar to Anchorage, and Lisbon would be similar to San Francisco. Except of course with global warming, you shift everything south again (taking into account that our experience of “similar weather to Vancouver” and climate advisories on the internet are anchored to the current +1.4°C level).
Central Europe doesn’t have a great equivalent because all other places have mountains pretty close to the coast, but Ukraine and western Russia are shielded by mountains and landmasses to their southwest similar to central Canada. So Kyiv would have similar weather to Edmonton, and Moscow similar to Fort McMurray (both in Alberta).
So it would be a pretty big shock, but not catastropic. Comparable to the Little Ice Age.
Eastern Canada isn’t a great example because of the prevailing winds. Even without the gulf stream, Europe would have less temperature variation than Eastern Canada because both have prevailing southwesterly winds. The Atlantic serves as a heat sink that dampens the extremes of winter and summer, so Europe would continue have less extreme temperatures than Eastern Canada - including less extreme cold.
Canada’s east coast is more similar to Hokkaido and Kamchatka. A better comparison for Europe would be Canada’s west coast. Paris would have similar weather to Vancouver, Oslo would be similar to Anchorage, and Lisbon would be similar to San Francisco. Except of course with global warming, you shift everything south again (taking into account that our experience of “similar weather to Vancouver” and climate advisories on the internet are anchored to the current +1.4°C level).
Central Europe doesn’t have a great equivalent because all other places have mountains pretty close to the coast, but Ukraine and western Russia are shielded by mountains and landmasses to their southwest similar to central Canada. So Kyiv would have similar weather to Edmonton, and Moscow similar to Fort McMurray (both in Alberta).
So it would be a pretty big shock, but not catastropic. Comparable to the Little Ice Age.