Retreat

Alternative definitions (3), class: vernacular (0)
Term: Retreat
Definition: A decrease in the length of a glacier compared to a previous point in time. As ice in a glacier is always moving forward, its terminus retreats when more ice is lost at the terminus to melting and/or calving than reaches the terminus. During retreat, ice in a glacier does not move back up the valley.
Created 2022.03.08
Last Modified 2023.03.27
Contributed by GCW Glossary
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