Multi-year ice

Alternative definitions (4), class: vernacular (0)
Term: Multi-year ice
Definition: Sea ice terminology that describes old ice which has survived at least two summer's worth of melt. Hummocks are smoother on multi-year ice than on second-year ice, and the ice is almost salt-free. Where bare, this ice is usually blue in colour. The melt pattern consists of large, interconnecting, irregular puddles and a well developed drainage system.
Created 2022.03.08
Last Modified 2023.03.27
Contributed by GCW Glossary