The singing firn

Antarctic firn presents an exotic seismological environment in which the behaviors of propagating waves can be significantly at odds with those in other Earth media. We present a condensed view of the nascent field of ambient noise seismology in Antarctic firn-covered media, and highlight multiple u...

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Bibliographic Details
Published in:Annals of Glaciology
Main Authors: Julien Chaput, Richard C. Aster, Marianne Karplus
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press 2022
Subjects:
Online Access:https://doi.org/10.1017/aog.2023.34
https://doaj.org/article/c33473de7631416fbc1e49001a59c846
Description
Summary:Antarctic firn presents an exotic seismological environment in which the behaviors of propagating waves can be significantly at odds with those in other Earth media. We present a condensed view of the nascent field of ambient noise seismology in Antarctic firn-covered media, and highlight multiple unusual and information-rich observations framed through the lens of the firn's important role as a buffer for air temperature anomalies and a complex contributor to ice mass balance. We summarize key results from several recent papers depicting novel wind-excited firn resonances and point to the plethora of ways these observations could facilitate imaging and monitoring of glacial systems at single, isolated seismometers. Finally, we propose significant instrumental and computational objectives necessary to constrain resonance excitation mechanisms and broadly apply these observations as useful monitoring tools in Antarctica.