Precursor Motion to Iceberg Calving at Jakobshavn Isbræ, Greenland, Observed with Terrestrial Radar Interferometry
glacier calving, ice block rotation, Lagrangian coordinates, subsurface melting, terrestrial radar interferometry
Digital Object Identifier (DOI)
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.
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Citation / Publisher Attribution
Journal of Glaciology, v. 62, issue 236, p. 1134-1142
Scholar Commons Citation
Xie, Surui; Dixon, Timothy H.; Voytenko, Denis; Holland, David M.; and Zheng, Tiantian, "Precursor Motion to Iceberg Calving at Jakobshavn Isbræ, Greenland, Observed with Terrestrial Radar Interferometry" (2016). School of Geosciences Faculty and Staff Publications. 1091.