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Calving flux estimation from tsunami waves

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Title: Calving flux estimation from tsunami waves
Authors: Minowa, Masahiro Browse this author →KAKEN DB
Podolskiy, Evgeny A. Browse this author
Jouvet, Guillaume Browse this author
Weidmann, Yvo Browse this author
Sakakibara, Daiki Browse this author
Tsutaki, Shun Browse this author
Genco, Riccardo Browse this author
Sugiyama, Shin Browse this author →KAKEN DB
Keywords: calving
Issue Date: 1-Apr-2019
Publisher: Elsevier
Journal Title: Earth and Planetary Science Letters
Volume: 515
Start Page: 283
End Page: 290
Publisher DOI: 10.1016/j.epsl.2019.03.023
Abstract: Measuring glacier calving magnitude, frequency and location in high temporal resolution is necessary to understand mass loss mechanisms of ocean-terminating glaciers. We utilized calving-generated tsunami signals recorded with a pressure sensor for estimating the calving flux of Bowdoin Glacier in northwestern Greenland. We find a relationship between calving ice volume and wave amplitude. This relationship was used to compute calving flux variation. The calving flux showed large spatial and temporal fluctuations in July 2015 and in July 2016, with a mean flux of 2.3 ± 0.15 × 105 m3 d−1. Calving flux was greater during periods of fast ice flow, high air temperature, and at low/falling tide, indicating the importance of increased longitudinal strain due to glacier acceleration and/or submarine melting at the calving front. Long-term measurements with the method introduced here are promising for understanding the complex interplay of ice dynamics, melting and calving at glacier fronts.
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 箕輪 昌紘

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