Singing ice shelves

antarctic seismomemters

Seismic monitoring of the Ross ice shelf (Antarctica) has revealed ambient resonances at frequencies >5 Hz1. Winds blowing across the ice cause the shelf to sing. The sounds occur year-round and spectral peaks occur at a range of frequencies between 4 and 50 Hz with power exceeding 15 dB. The singing changes in response to both wind storms blowing snow dunes across the surface of the ice and snowmelt events altering the composition of the firn. The findings mean that ambient noise seismology can be used as a tool to continuously monitor the surface of ice shelves.

Notes

1 Chaput et al. (2018) Near-surface environmentally forced changes in the Ross Ice Shelf observed with ambient seismic noise. Geophysical Research Letters 10.1029/2018GL079665

https://news.agu.org/press-release/antarctic-ice-shelf-sings-as-winds-whip-across-its-surface/

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

Blog at WordPress.com.

Up ↑

%d bloggers like this: