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Tide-modulated ice flow variations drive seismicity near the calving front of Bowdoin Glacier, Greenland
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| Title: | Tide-modulated ice flow variations drive seismicity near the calving front of Bowdoin Glacier, Greenland |
| Authors: | Podolskiy, Evgeny A. Browse this author | | Sugiyama, Shin Browse this author →KAKEN DB | | Funk, Martin Browse this author | | Walter, Fabian Browse this author | | Genco, Riccardo Browse this author | | Tsutaki, Shun Browse this author | | Minowa, Masahiro Browse this author | | Ripepe, Maurizio Browse this author |
| Keywords: | cryoseismicity | | tide | | strain rate | | icequake | | Greenland | | calving front |
| Issue Date: | 16-Mar-2016 |
| Publisher: | American Geophysical Union |
| Journal Title: | Geophysical research letters |
| Volume: | 43 |
| Issue: | 5 |
| Start Page: | 2036 |
| End Page: | 2044 |
| Publisher DOI: | 10.1002/2016GL067743 |
| Abstract: | Glacier microseismicity is a promising tool to study glacier dynamics. However, physical processes connecting seismic signals and ice dynamics are not clearly understood at present. Particularly, the relationship between tide-modulated seismicity and dynamics of calving glaciers remains elusive. Here we analyze records from an on-ice seismometer placed 250m from the calving front of Bowdoin Glacier, Greenland. Using high-frequency glacier flow speed measurements, we show that the microseismic activity is related to strain rate variations. The seismic activity correlates with longitudinal stretching measured at the glacier surface. Both higher melt rates and falling tides accelerate glacier motion and increase longitudinal stretching. Long-term microseismic monitoring could therefore provide insights on how a calving glacier's force balance and flow regime react to changes at the ice-ocean interface. |
| Rights: | ©2016. The Authors. Tide-modulated ice flow variations drive seismicity near the calving front of Bowdoin Glacier, Greenland, Geophys. Res. Lett.,43, 2036-2044, doi:10.1002/2016GL067743. | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/61471 |
| Appears in Collections: | 北極域研究センター (Arctic Research Center) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: Evgeny A. Podolskiy
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