If other polar regions imitate the process, it could potentially lead to a reassessment of global sea-level rise projections.
Thwaites is said to be the most unstable place in the Antarctic and contains the equivalent of 60 centimeters of sea level rise.New data indicates warming and high-pressure seawater beneath the Thwaites Glacier in West Antarctica , called the ‘Doomsday glacier’, leading to vigorous melting.
These satellites represent a collection that resembles constellations in polar orbit around the planet. They employ InSAR – interferometric synthetic aperture radar – to continuously track changes on the Earth’s surface.. “These ICEYE data provided a long-time series of daily observations closely conforming to tidal cycles,” stated lead author Eric Rignot, UC Irvine professor of Earth system science.
“When we have a continuous time series and compare that with the tidal cycle, we see the seawater coming in at high tide and receding and sometimes going farther up underneath the glacier and getting trapped. Thanks to ICEYE, we’re beginning to witness this tidal dynamic for the first time.”While Rignot noted that the project helped scientists better apprehend the behavior of seawater on the undersides of Thwaites Glacier.
“There are places where the water is almost at the pressure of the overlying ice, so just a little more pressure is needed to push up the ice,” Rignot emphasized. “The water is then squeezed enough to jack up a column of more than half a mile of ice.”
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