What is Polar Vortex?
Polar Vortexes are mainly arctic hurricanes or cyclones, and they are not considered rare. It is a winter phenomenon, and Arctic Vortex form as the sun sets at the pole and temperatures drop. They form in the middle and upper troposphere and stratosphere. In the Northern Hemisphere, Vortexes move counterclockwise. As a rule, they sink over Canada, but according to scientists, the Polax Vortex can move farther to the continent because of the warm weather in Greenland or Alaska.
What Polar Vortex Causes?
They are madly cold to such an extent that the bodies of frozen sharks can be carried ashore. They are cold so that the owners of the zoo in Calgary (Canada) move a group of royal penguins to a warmer room (and this species in nature lives on islands north of Antarctica).
But fortunately, the Arctic frost does not last long, and the temperature rises soon.
It is very unpleasant when this low-pressure system reaches the southern regions. It carries cold air to places where it is very unusual to see snow. Thus, the weather of Antarctica can be in Florida and bring a taste of winter life.
Separation of Polax Vortex is the main reason for frosts in southern regions. Strange as it may seem, this happens when the funnel does not have much power. When the vortex is powerful, the whole airflow is in one circle and does not come out of it. Thus, the cold air stays in the north and the warm air in the south.
When the flow is weak, it is not stable and moves in different directions. If the flow meets an obstacle, the mass of the cold air of the Polar Vortex system will fall to the south.
However, we should not attribute cold weather to the Polar Vortex. Basically, it is in the north, and in general, does not come out of there. To weaken it, you need certain conditions, and they are quite unusual. The migration of the Polar Vortex to the south is very rare.
When Was the Polar Vortex?
This phenomenon occurred in 2014. There was a sudden weakening, and a high-pressure zone appeared over Greenland. It blocked the cold air outlet, and part of the Polar Vortex moved south.
This process caused a serious drop in temperature even in Florida. In most of Canada and different parts of the United States at the height of this event, the temperature was lower than in Alaska.
How Does Global Warming Affect the Polar Vortex?
Scientists say that the cold is getting warmer. This conclusion is made based on the event in January 2019. This time the Polar Vortex in the United States was weaker than usual. One example is not enough to claim a pattern, but global warming will affect the weather conditions and not even the Polar Vortexes.
Recent research suggests that the Earth has begun to warm up faster at the poles than in other regions. This means that the temperature difference that causes jet streams to move has decreased. They also say that the unstable polar jet stream directly affects the climate. Such changes can lead to frequent separation of cold streams south of the Polar Vortex. However, the direct correlation between temperature rise and Arctic Polar Vortex weakening has yet to be determined.