Long-Term Infrasonic Monitoring of Land and Marine-Terminating Glaciers in Greenland

L. G. Evers*, P. S.M. Smets, J. D. Assink, S. Shani-Kadmiel, K. Kondo, S. Sugiyama

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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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.

Original languageEnglish
Article numbere2021GL097113
Pages (from-to)1-8
Number of pages8
JournalGeophysical Research Letters
Volume49
Issue number8
DOIs
Publication statusPublished - 2022

Keywords

  • CTBT
  • glacier
  • Greenland
  • infrasound
  • seismo-acoustics

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