In collaboration with the Alaska Satellite Facility (ASF) and the University of Alaska Fairbanks (UAF), the University of Utah has generated the first near-comprehensive map of glacier flow speeds throughout Alaska, using synthetic aperture radar (SAR) data.
Radar Reveals Thinning Lake Ice
Over the last 20 years, Arctic lakes have been freezing later in the year and thawing earlier – and fewer of them freeze solidly to lake bottoms. Those are among the findings from a recent study of shallow lakes on Alaska’s North Slope led by University of Waterloo researcher Cristina Surdu. The team examined SAR images from 1991 to 2011 and also used climate data to model ice thickness and duration from 1950 to 2011.