Arctic Ice

The Arctic ice pack is the sea ice cover of the Arctic Ocean and its vicinity. The Arctic ice pack undergoes a regular seasonal cycle in which ice melts in spring and summer, reaches a minimum around mid-September, then increases during fall and winter. Summer ice cover in the Arctic is about 50% of winter cover. Some of the ice survives from one year to the next. Currently, 28% of Arctic basin sea ice is multi-year ice, thicker than seasonal ice: up to 3–4 m thick over large areas, with ridges up to 20 m thick. The regular seasonal cycle there has been an underlying trend of declining sea ice in the Arctic in recent decades as well.

Read more in the app

Melting Arctic ice could transform international shipping routes, study finds

Arctic Ice Already Thinning at a 'Frightening Rate', Satellites Reveal