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TRIBUNTRAVEL.COM – The scientists were very surprised to have managed to record the sounds produced by the ice sheet Antarctic
This voice can not be heard by the human ear but is powerful enough to be captured by seismic sensors.
Cited by several sources, the sound is the result of winds that hit the snowy hills to create vibrations on the surface.
The result is a seismic tone called a sad or moaning song.
The report, written in the journal Geophysical Research Letters, was obtained by scientists from the results of listening to data collected for two years.
They discovered that the ice nearly touched at a frequency of 5 hertz with a cyclone every five seconds. This loud buzz was caused by gusts of wind.
They also found that the deformations will change based on events that affect snow and ice surfaces, such as storms that alter the position of sand dunes or melt excess ice sheets.
Scientists detect vibrations unexpectedly. From 2014 to 2017, they installed 34 seismic sensors on the Ross Ice Shelf to monitor other aspects of ice shelf behavior.
But when they examine the recordings, they find that the top layer of snow vibrates almost all the time, because of the active winds moving on its uneven surface, which then causes a seismic buzz.
"It's as if we are constantly whizzing on the ice floe," said in a statement the senior author of the study, Julien Chaput, a geophysicist and mathematician at Colorado State University in Fort Collins.
The buzzing also changes under certain conditions. after a strong storm changed the shape of a snow hill and when the warming of January 2016 caused the melting of the surface.
This sound monitoring can allow scientists to track changes on the ice surface remotely, and virtually in real time. This can help them develop a more complete picture of the stability of the pack ice.
This article is published on Tribunjogja.com with the title Seismic sensors successfully record ice noises "Whimpers & # 39; in Antarctica
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