The polar vortex can stretch like the recent event or even break in two like more severe cold snaps in the 80's and 90's. The solar activity (high or low) does not cause anything directly. However it is observed that high solar activity can speed up the Sudden Stratospheric Warmings like the mini one we just had. The connection is through the strength of the anticyclonic polar vortexes that surround the cyclonic polar vortex. The anticyclones can strengthen due to high solar activity that increases the easterly flow in the tropical stratosphere.
Thank you for that explanation. Another question....is “polar vortex” a new term made up to sound cute, or is it term that’s been around forever? Is it different from an “arctic blast”?
“The polar vortex can stretch like the recent event or even break in two like more severe cold snaps in the 80’s and 90’s. The solar activity (high or low) does not cause anything directly.”
Some people believe differently. http://www.youtube.com/watch?v=1ivcycdvO1A&feature=c4-overview&list=UUTiL1q9YbrVam5nP2xzFTWQ