Type II polar stratospheric clouds (PSCs) are known as one of the most beautiful cloud types in Earth's repertoire, appearing above the Arctic and Antarctic as softly glowing whisps with a ...

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation ...

Professor Toon has helped conceive, develop and lead many NASA airborne field missions aimed at understanding stratospheric ... of cloud-related physical processes in models. Professor Randall's ...

The polar vortex could be reversing in a sudden stratospheric warming event, with the potential to send Arctic air and storms to the central and eastern U.S. Skip to main content Open menu Close menu ...

On March 9, the polar vortex wobbled and then snapped back the other way as mighty winds, suddenly shifting from the west to the east - something that typically happens once a year - usually in the ...

A sudden stratospheric warming occurs when the layer between 10 and 50km above Earth's surface heats up by 50 degrees in just two days. The weather event weakens the polar vortex, which is a large ...

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation shows the vortex also moved away from the Arctic towards Europe.