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Winds blowing on the snow dunes on the Antarctic ice shelf in Ross are thrilling the surface of the massive ice sheet, producing an almost constant roll of "seismic tones" that scientists could potentially use to monitor changes from the ice plate by far, according to new research. The "song" of the pack ice is too low to be heard by human ears, but it was made audible here by the geophysicist and mathematician Julien Chaput, who accelerated the recording of the 2015 ice floe vibrations about 1 200 times. (American Geophysical Union, NOAA and Scripps Institution of Oceanography at the University of San Diego)
Scientists have discovered strange "songs" of sounds coming from the pack ice in Antarctica as they observed seismic changes on the Ross ice floe.
Scientists began their observations in 2014 on the Ross ice floe, the largest ice sheet in Antarctica and the size of Texas, which helps keep the ice flowing from the ground into the water. They placed 34 seismic monitors in the snow and, from these monitors, they heard the buzz, which surprised the researchers.
"It's a bit like you're constantly blowing on the ice of a flute," said Julien Chaput, geophysicist and mathematician at Colorado State University in Fort Collins, lead author of the new study, in a communicated.
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Listen to the sounds of the video below:
According to the summary of the study, it is likely that the snow vibrates under the effect of wind changes. "We propose that the spectral variations of the peaks result from the redistribution of snow on the surface during strong winds and speed drops reflecting a weakening of the snow network near 0 ° C for melting," says the summary.
The study was published in the scientific journal, Letters of geophysical research.
The buzz is too weak to be heard with human ears, but this could give researchers a clue as to how the ice shelves handle climate change conditions and other sensitive details.
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"The pack ice response tells us that we can follow extremely sensitive details about it," Chaput said in his release. "Basically, what we have in our hands is a tool to monitor the environment, really, and its impact on the pack ice."
Follow Chris Ciaccia on Twitter @Chris_Ciaccia
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