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 ...

Weather analysts are divided over the polar vortex’s influence on weather and what that means for the rest of this year’s winter. The polar vortex is an area of low pressure and cold air that ...

The polar vortex is usually “like an aircraft carrier, it doesn’t turn around quickly and isn’t very nimble,” Cohen said. “I’ve really never seen anything like it.” ...

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.

The polar vortex is area of fast-moving winds well above the Earth’s surface and the jet stream that circle the Arctic during the Northern Hemisphere’s coldest months.