Mark Fahnestock, University of Alaska Fairbanks, Fairbanks,AK United States
Mark Fahnestock, University of Alaska Fairbanks, Fairbanks,AK
It shows every tidewater advance (3 or 4, depending) and retreat, every lake calving retreat (at least one >10 km) and new terminal lake appearance, and nearly every surge. The record makes clear that some surges here have a duration of 5 years or more and some repeated surges evolve in character over time; a spectrum of surge behavior is apparent. Pulses of flow in Malaspina and adjacent glaciers produce the large folds in medial moraines characteristic of that piedmont lobe. Terminus retreats, accompanied by extensive thinning, cause other rapid large-scale rearrangements of flow. The record illustrates how common landslides onto the ice are, and allows one to trace the fate of those deposits. It also shows the timing and extent of the near-complete loss of accumulation area in the coastal glaciers north of Glacier Bay. In short, watching ice flow over the 1972-2019 period shows you what actually happened.
Proposed Session Title:
Glacier Monitoring From In-Situ and Remotely Sensed Observations
Proposed Section/Focus Group: