The Polar Vortex,an atmospheric phenomenon that shapes our winter weather,has been gaining attention as it undergoes changes that could signal a shift in Earth's climate. This high-altitude, rotating ...

Two newly identified patterns in the stratospheric polar vortex can send cold air over North America to cause extreme cold snaps, but the parts of the country that suffer differ between them. Those ...

When the polar vortex stretches, North America feels the chill. New research reveals some of the stratospheric patterns ...

These polar vortex stretches are happening more frequently as the world — and especially the Arctic — warms, a 2021 paper published in the journal Science, also co-authored by Cohen, demonstrated.

One way to track the polar vortex is through potential vorticity, which describes the amount of rotational energy, or "spin," in a parcel of air. This animation shows daily potential vorticity in ...

Polar Vortex forecast from March 6 to March 20, 2025. (source: Judah Cohen, AER) Judah Cohen The stratosphere actually warms an incredible amount in a short time during these SSW’s.

The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a normal pattern that is stronger in the winter and keeps some of the ...

During the winter, the polar vortex is a regular player in the weather game. It’s not always the same every year, but it’s a common occurrence.