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- Title
Precursor motion to iceberg calving at Jakobshavn Isbræ, Greenland, observed with terrestrial radar interferometry.
- Authors
XIE, SURUI; DIXON, TIMOTHY H.; VOYTENKO, DENIS; HOLLAND, DAVID M.; HOLLAND, DENISE; ZHENG, TIANTIAN
- Abstract
Time-varying elevations near the calving front of Jakobshavn Isbræ, Greenland were observed with a terrestrial radar interferometer (TRI) in June 2015. An ice block with surface dimensions of 1370 m × 290 m calved on 10 June. TRI-generated time series show that ice elevation near the calving front began to increase 65 h prior to the event, and can be fit with a simple block rotation model. We hypothesize that subsurface melting at the base of the floating terminus breaks the gravity-buoyancy equilibrium, leading to slow subsidence and rotation of the block, and its eventual failure.
- Subjects
JAKOBSHAVN Glacier (Greenland); ICE calving; RADAR interferometry
- Publication
Journal of Glaciology, 2016, Vol 62, Issue 236, p1134
- ISSN
0022-1430
- Publication type
Article
- DOI
10.1017/jog.2016.104