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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
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.
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)

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