Glossary
The English version of our glossary is currently under construction and will be regularly updated.
Two-year ice
Old sea ice that has only survived one summer melting.
Old sea ice that has only survived one summer melting. Because it is thicker but less dense than first-year ice, it extends farther above the water’s surface. Unlike multiyear ice, two-year ice features regular patterns of numerous small melt ponds during summer melting. Its snow-free patches and melt ponds are typically greenish-blue.