Brutal midwinter cold is settling in across the eastern United States, and forecasters say it is not leaving quickly. A ...

Vortex dynamics in cylindrical containers encapsulate a range of complex fluid behaviours driven by rotational motion. In these geometries, the interplay between centrifugal forces and viscous effects ...

It's as if the world has been turned upside-down, or at least its weather. You can blame the increasingly familiar polar vortex, which has brought a taste of the Arctic to places where winter often ...

When the polar vortex stumbles, the weather at ground level can pivot from mild to brutal in a matter of days. A circulation that usually spins quietly above the pole can suddenly send lobes of Arctic ...