The largest Arctic ozone hole ever measured is hovering over the North Pole
An unusual confluence of events is dramatically thinning the ozone layer over the Arctic
![Ozone in stratosphere](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/04/040620_cg_arctic-ozone_feat.jpg?fit=1028%2C579&ssl=1)
Total ozone measured in the stratosphere over the Arctic on April 4. Smallest amounts of ozone are in purple and blue; larger concentrations are in yellow and red.
NASA Ozone Watch