C13B-0814
Calving and velocity variations observed by Terrestrial Radar Interferometry at Jakobshavn Isbræ, Greenland, in 2015
Monday, 14 December 2015
Poster Hall (Moscone South)
Surui Xie1, Denis Voytenko2, David Holland2 and Timothy H Dixon1, (1)University of South Florida Tampa, Tampa, FL, United States, (2)New York University, New York, NY, United States
Abstract:
We observed the highly dynamic terminus of Jakobshavn Isbræ in Greenland by using a Terrestrial Radar Interferometer (TRI) during a 5 days’ period in early June, 2015. Calving and ice surface velocity variations were captured by our continuous measurements with a sampling rate of 90 seconds. Our terrestrial-derived time series show that calving events are characterized by suddenly fluctuations in surface velocities, which is very distinct in the mélange and less distinct on the glacier. Except for the relatively fast and steady motion, the glacier also moves in response to the semidiurnal ocean tides, and the impact of tides decreases rapidly upstream from the terminus.
