The regions differ slightly between the Sea Ice Index and the Multisensor Analyzed Sea Ice Extent - Northern Hemisphere (MASIE-NH). The two data sets are a source for sea ice extent, but they use ...

Antarctic sea ice began to change rapidly in 2015 and 2016. Since then it has remained well below the long-term average.

Learn about the new technique being used to study cracks that have formed on Antarctica's unstable Doomsday Glacier.