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Long-Term Infrasonic Monitoring of Land and Marine-Terminating Glaciers in Greenland
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| Title: | Long-Term Infrasonic Monitoring of Land and Marine-Terminating Glaciers in Greenland |
| Authors: | Evers, L. G. Browse this author | | Smets, P. S. M. Browse this author | | Assink, J. D. Browse this author | | Shani-Kadmiel, S. Browse this author | | Kondo, K. Browse this author | | Sugiyama, S. Browse this author →KAKEN DB |
| Keywords: | infrasound | | glacier | | Greenland | | CTBT | | seismo-acoustics |
| Issue Date: | 11-Apr-2022 |
| Publisher: | American Geophysical Union |
| Journal Title: | Geophysical research letters |
| Volume: | 49 |
| Issue: | 8 |
| Start Page: | e2021GL097113 |
| Publisher DOI: | 10.1029/2021GL097113 |
| Abstract: | A period of 18 years of infrasonic recordings was analyzed from a microbarometer array (I18DK) in northwestern Greenland, near Qaanaaq. A huge number of infrasonic detections, over 700,000, have been made in I18DKs soundscape during the Arctic summers. Simultaneously identified were both calving events from marine-terminating glaciers and discharge related acoustics from a land-terminating glacier. This infrasonic activity is correlated to sea-surface and atmospheric temperature, respectively. Inter-yearly to daily variations were retrieved showing a strong variability in infrasonic detection rates and hence glacier activity. The highest number of infrasonic detections were found in recent years from the land-terminating glacier. The latter is supported by actual discharge measurements and partly by a discharge model. It is concluded that monitoring infrasound from glaciers can complement other techniques to remotely and passively get insights into glacier dynamics with high temporal and spatial resolution. |
| Rights: | https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/87040 |
| 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)
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