Polar Vortex Behind U.s. Big Chill

[galiraju]

http://youtu.be/PCtDB0zOcO4

 

A polar vortex (also known as a polar cyclone, polar low, or a circumpolar whirl[1]) is a persistent, large-scalecyclonelocated near either of a planet'sgeographical poles.

 

 

[fakeniranjan]

malli vastonda endi