Accumulation-area ratio AAR

Alternative definitions (1), class: vernacular (0)
Term: Accumulation-area ratio AAR
Definition: The ratio, often expressed as a percentage, of the area of the accumulation zone to the area of the glacier. The AAR is bounded between 0 and 1. On many glaciers it correlates well with the climatic mass balance. The likelihood that the climatic mass balance will be positive increases as the AAR approaches 1. Unless qualified by a different adjective, references to the AAR refer to the Annual AAR.
Created 2022.03.08
Last Modified 2023.03.27
Contributed by GCW Glossary