The extent of Arctic sea ice, being the areal sum of sea ice covering the ocean (i.e. sea ice plus open ocean between the ice) where sea ice concentration exceeds a threshold of 15%.
Extent of Arctic Sea Ice
2002 to present, with averages for the previous three decades
![](https://evidentlyso.com.au/wp-content/uploads/Extent-of-arctic-sea-ice.png)