Brief Communication: Twelve-year cyclic surging episodes at Donjek Glacier in Yukon, Canada

摘要

pstrongAbstract./strong Surge-type glaciers repeat their short active phase and their much longer quiescent phase usually every several decades or longer, but detailed observations of the evolution cycles have been limited to only a few glaciers. Here we report three surging episodes in 1989, 2001, and 2013 at Donjek Glacier in the Yukon, Canada, indicating remarkably regular and short repeat cycles of 12??years. The surging area is limited within the a??a??span class="thinspace"/span20span class="thinspace"/spankm section from the terminus, originating in an area where the flow width significantly narrows downstream, suggesting a strong control of the valley constriction on the surge dynamics./p.