Sugiyama S, Minowa M, Schaefer M (2019)
Publication Type: Journal article
Publication year: 2019
Book Volume: 46
Pages Range: 2602-2609
Journal Issue: 5
DOI: 10.1029/2018GL081441
Underwater ice geometry at the front of calving glaciers provides crucial information for calving and underwater melting. In this study, we present ice geometry captured by operating a side-scanning sonar near the front of Glaciar Grey, a freshwater calving glacier in Patagonia. The observations revealed ice projecting into the lake with a substantially different structure from that of known tidewater glaciers. Terrace-like ice structures were found at several tens of meters below the water surface and extended up to 100 m from the aerial ice front. The structure depicted by the sonar was confirmed when the ice front was exposed by flotation during a major calving event. We infer that buoyant force acting on the submerged ice terrace acted as a driver of the calving event. Our study demonstrates the importance of the underwater ice geometry, which affects sizable calving at the front of freshwater calving glaciers.
APA:
Sugiyama, S., Minowa, M., & Schaefer, M. (2019). Underwater Ice Terrace Observed at the Front of Glaciar Grey, a Freshwater Calving Glacier in Patagonia. Geophysical Research Letters, 46(5), 2602-2609. https://dx.doi.org/10.1029/2018GL081441
MLA:
Sugiyama, Shin, Masahiro Minowa, and Marius Schaefer. "Underwater Ice Terrace Observed at the Front of Glaciar Grey, a Freshwater Calving Glacier in Patagonia." Geophysical Research Letters 46.5 (2019): 2602-2609.
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