According to this CBC article, global warming could make Atlantic Canada colder as Arctic ice drifts south.
The melting Arctic ice would alter a phenomenon known in scientific circles as meridional overturning circulation, where warm ocean currents move north and colder currents move south, maintaining a moderate climate on the Atlantic coast.
If you read the comments at the bottom of the article, you will notice many CBC readers don’t seem to believe in global warming. (I think we’re in for a Conservative majority.)
Here’s a video of some of the ice that’s melting: