Multi-year ice

Alternative definitions (4), class: vernacular (0)
Term: Multi-year ice
Definition: Old ice up to 3 m or more thick that has survived at least two summers' melt. Hummocks are even smoother than in second-year ice and attain a look of mounds and hills. The surface of multiyear ice fields in places not subject to deformations is also hillocky due to non-uniform multiple melting. The ice is almost salt-free. Its color, where bare, is usually blue. As a result of melting, round puddles appear at its surface in summer and a well-developed drainage system is formed.
Created 2022.03.08
Last Modified 2023.03.27
Contributed by GCW Glossary