What is POLAR VORTEX?
Polar vortex is large frigid air mass. It is located near the earth’s geographical poles. It is low pressure area continuously circulating cold air in counter clockwise direction. When the air is being circulated it becomes more cold and denser. It is strongest in winter season and weaker during the summer. It moves very slowly or even stays stationary.Also known as Sub-Polar cyclone or Circumpolar Whirl.
Where is the Polar Vortex?
Northern Hemisphere: On earth it hovers for year around the Arctic with two centers. i.e. 1. Canada’s Baffin Island. 2. near Siberia.
Southern Hemisphere: It is located near the edge of Ross Ice Shelf in Antarctica
Why is polar vortex making this winter so cold in U.S.?
It’s normal for some of frigid air moves southward but these times it proves exceptionally by dragging piece of vortex towards U.S. U.S. Scientist have been told that in the past it occurred at the frequency of 20 years. Scientist have begun to study whether there is link between the effect of climate change and the extreme weather conditions.
Polar vortex and Ozone depletion:
The chemical reaction between nitric acid of polar stratospheric clouds reacts with CFC to form chlorine which acts as catalyst for ozone depletion. It is observed generally on the Antarctic Polar vortex.
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