https://www.commondreams.org/headline/2013/03/25-7
Climate change can and does occur chaotically as we can see from this.
She goes on to explain that the rapid decline in sea ice is what is affecting the jet stream and leading to the extreme weather currently being experienced in the mid-latitudes.
"It allows the cold air from the Arctic to plunge much further south. The pattern can be slow to change because the [southern] wave of the jet stream is getting bigger. It's now at a near record position, so whatever weather you have now is going to stick around."
Adding to her assertion, in a report published earlier this month in the Proceedings in the National Academy of Scientists, researchers confirm that global-warming induced sea ice loss is causing changes in the "winter Northern Hemisphere atmospheric circulation," including the jet stream, which allows cold Arctic air to reach further south and causes "more frequent episodes of blocking patterns that lead to increased cold surges over large parts of northern continents."
Climate change can and does occur chaotically as we can see from this.