Measurements of Glacier Velocity Variations at Qamanarssup Sermia and at Kitdlerssuaq Glacier, West Greenland

摘要

Ice velocity determinations with short time interval have been carried out at an outlet glacier from a local ice cap. The horizontal and the vertical velocity components show distinct diurnal variations. Close examination indicates that these variations are caused by the change in atmospheric refraction during the day, with the vertical component as the most important. Ice velocity determinations with longer intervals clearly reveal a marked decrease of velocity through the summer season indicating slide of both glaciers during the summer season. (ERA citation 10:008465)