Greenland ice researcher Jason Box of the Geological Survey of Denmark and Greenland, who wasn’t part of the research, called Rignot’s technique clever and said the study makes sense, showing “that ocean heat delivery to tidewater glacier grounding lines represents a potent destabilizing effect.”īox, who uses a different technique to calculate how much ice is no longer being fed by glaciers and is doomed to melt, something called “zombie ice,” figures 434 billion metric tons of ice on Petermann are already committed to melting. “That’s where the concept of a glacier being alive starts getting to you.” “When you are standing on that shelf or sleeping on the shelf you hear noise all the time, loud noises from deep inside cracks forming,” Rignot said. Greenland has decided to suspend all oil exploration off its coast, calling it ‘a natural step’ because it ‘takes the climate crisis seriously.’ World & Nation Greenland suspends oil exploration because of climate change Visiting Petermann, even before the glacier’s retreat accelerated, Rignot said he noticed movements that make it seem like a living thing. He hasn’t been there since 2006, a decade before the changes were seen via satellite. Rignot this month is exploring Petermann to get more ground-based measurements using ultrasound. The melting in Petermann has accelerated in the last few years, later than the rest of Greenland, probably because it is so far north that the water melting it from underneath is from the North Atlantic and it takes longer for the warmer water to reach there, Rignot theorized. Previous models forecast zero melt there. Using satellite altitude measurements, Rignot’s team found a 669-foot tall cavity at the grounding line where the melt rate is 50% higher in the last three years than it was from 2016-19. And it’s kind of the most sensitive part of the glacier.” “And that water is full of heat and able to melt the glaciers vigorously. “The sea water actually goes much farther beneath the grounded ice, kilometers, not hundreds of meters,” Rignot said. Greenland has more than 120 trillion tons of ice that can be thought of as zombie ice that will raise sea level globally by at least 10 inches, a study says. World & Nation ‘Zombie ice’ from Greenland will raise sea level 10 inches, study says
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