At the South Pole, stratospheric
polar vortexes are reliably strong thanks to the extreme cold, so the ozone
layer regularly thins.
This year’s Arctic
was unusually strong and long-lived, helping to deplete the ozone
Scientists say that in March, a stratospheric
— a band of strong, frigid winds circling the pole — corralled chlorine
that chewed away at the ozone
A powerful polar vortex
helped eat a hole in the ozone
layer over the Arctic.
Polar vortexes grow stronger in the cold, producing more of the high-altitude clouds that activate the chemicals that eat up the ozone