Term: Accumulation-area ratio AAR Class:  
 vernacular   (0%)
Created 6 June 2017
Last modified 6 June 2017
Contributed by GCW Glossary


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.  IHPGlacierMassBalance