The north and south poles of the Earth are two enigmatic places full of great mysteries; in these areas of the planet, there are meteorological phenomena that do not occur anywhere else, and although it sounds like a conspiracy theory or science fiction movie, at the poles of the Earth there are two huge, icy menace walls that protect us from an ice threat that has claimed many lives throughout human history.
But don’t worry, before you start imagining huge walls of ice and giant creatures that threaten the human race, you should know that we are not talking about a wall of ice but rather an invisible wall of air, and by threats, we don’t mean referring to creatures but incredible atmospheric phenomena.
Do you want to know what this invisible wall is and what atmospheric phenomena we are discussing? Join us to find out!
The threat of ice, the polar vortex
The threat that we talked about at the beginning of this video is an atmospheric phenomenon called “Polar Vortex, “this is a large-scale persistent cyclone that is located in the polar areas of the Earth, and it is one of the most terrifying, must be treated with respect because throughout history they have claimed many lives.
There are two polar vortices, one in the north and one in the south.
The Antarctic polar vortex is more pronounced and persistent than the Arctic vortex; This is because the distribution of land masses in high latitudes in the Northern Hemisphere leads to an increase in Rossby waves that help break the vortex and cause it to move out of the regions where it is normally found. In contrast, the vortex remains less affected in the southern hemisphere because it is concentrated almost entirely over Antarctica.
Rossby atmospheric waves are produced by the conservation of vortex power and are influenced by the Coriolis force and the pressure gradient. Earth’s rotation causes fluids like the atmosphere to rotate to the right as they move in the Northern Hemisphere and to the left in the Southern Hemisphere, this is the Coriolis force.

Polar Night Jet
Also known as Jet Strem or Jet Currents, these are fast-flowing air currents very close to the poles and are the invisible walls protecting us from polar vortices.
Jet streams can start, stop, split into two or more parts, combine into a single stream, or flow in multiple directions, including opposite the direction of the rest of the jet.

The threat is always there
Although jet streams keep us safe from polar vortices, it is now beginning to be observed that polar vortices often break up and leave their regions, especially in the northern hemisphere, which is where the vortex is not Uniform.

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