In the center of the main hall.
A giant screen took up the entire wall, displaying images transmitted back from a satellite.
Above the Arctic, a massive, counter-clockwise atmospheric vortex was slowly forming.
The atmospheric vortex was a colossal cloud mass, its outline gradually taking shape across the vast expanse of the sky, carrying with it a mysterious and awesome power.
This was the polar vortex, also known as the circumpolar gyre or the circumpolar vortex.
As a large-scale, persistent cyclonic circulation, it exists in the region between the middle-to-upper troposphere and the stratosphere.
The reason such a vortex forms is that the polar regions are the Earth's cold poles.
Above the North and South Poles, thermal dynamics create an extremely powerful cold-core low-pressure system.
This cold-core low acts like a giant vacuum, drawing in the surrounding air to constantly spiral and converge.
And the polar vortex is at its most powerful during the polar night.
