NASA Says So Much Water Pulsed Through a Melting Glacier, It Warped Earth’s Crust
NASA scientists have detected a melting pulse of ice and water that crosses a glacier in major Greenland was so large that it distorts the solid Earth – an increase in mass of 18,000 Empire State buildings.
The wave – which occurred during the 2012 registration merger – has traveled nearly 15 miles across the Pista glacier in western Greenland four months to reach the sea, researchers said.
“This is a gigantic mass,” said Eric Larour, one of the study’s authors and researcher at NASA’s Propulsion Laboratory. “He is able to bend the base around him.”
Such a “wave” has never been detected on a glacier in Greenland or Antarctica. The total mass carried in the wave – form of water, ice or a combination of both – was 1.67 billion tonnes per month, or 6.68 billion tonnes in four months, the study, published in Geophysical Research Letters, he found himself.
The study was done by the laboratory Surendra Adhikari and was also co-written by Erik Ivins.
“Lonely waves are fairly well known in rivers,” said Ivins, a researcher at the Jet Propulsion Laboratory. “Rivers can have floods upstream, where the amount of water is collected, and the water accumulates then flows downstream, and never panics, it remains like this wave and continues to cross a river.”
However, scientists do not know what a wave was or just what made it – there is a lot to do below the surface of the glacier. They do not know exactly what he was doing. “We lost a combination of water and ice, we do not know what fraction,” Adhikari said.
Researchers have only been able to detect the wave because a GPS sensor, located in an inner rocky area a little over 12 miles, moved 15 millimeters when the wave passes, pushing down into the crust and causing a deep indentation.
“GPS can detect it,” says Larour.
Richard Alley, a glaciologist at Penn State University, who did not participate in the study, compared the effect of something much more mundane and more relevant in our daily lives.
“Find a bed,” said E-mail Alley. “Put a small piece of tape on the sheet Put your right hand on the tape and press down while the tape is seen The tape moves down while pushing down, and also moves horizontally towards your only a small Push your hand and the band does not move as much … push harder, and you will move more … pushing down, slide your hand past the cassette and see a pattern of vertical and horizontal movements of the strip.
“A bed is not exactly the elastic ground, but that’s what this team is,” says the alley. “They saw a” fist mass “gliding across the glacier past their GPS station, caused by the additional thawing water.
The “wave” came following a merger event of the summer of 2012, which saw most of Greenland’s surface covered with liquid water, and has not yet been surpassed by these warm years. Investigators suspect that part of this meltwater was flooded under the ice sheet and then pushed out by the Rink glacier.
“It really is related to the inner depths of Greenland is melting and full of trying to get rid of that mold by gravitational processes,” Ivins said.
The study also documented another smaller “wave” track on the glacier in 2010, another year of major merger.