“We knew of such scour marks from places like the Antarctic and Greenland. They arise when large ice sheets become grounded on the ocean floor and then scrape over the ground like a plane with dozens of blades as they flow. The remarkable feature of our new map is that it indicates very accurately right off that there were four or more generations of ice masses, which in the past 800,000 years moved from the East Siberian Sea in a north-easterly direction far into the deep Artic Ocean.” Quoted from the Alfred Wegener Institute press release.
“Hidden for all of human history, a 460 mile long canyon has been discovered below Greenland’s ice sheet. Using radar data from NASA’s Operation IceBridge and other airborne campaigns, scientists led by a team from the University of Bristol found the canyon runs from near the center of the island northward to the fjord of the Petermann Glacier.” Quoted from the NASA video release.
“Scientists’ understanding of how Greenland Ice Sheet melt water travels in passages along the bedrock below fails to account for some key processes. This, in turn may be affecting their assessment of how ice sheets respond to climate change.” Quoted from the National Science Foundation press release.
“Supraglacial lakes — bodies of water that collect on the surface of the Greenland ice sheet — lubricate the bottom of the ice when they drain, causing it to flow faster.” Quoted from the National Science Foundation press release.
“Last July, something unprecedented in the 34-year satellite record happened: 98 percent of the Greenland Ice Sheet’s surface melted, compared to roughly 50 percent during an average summer.” Quoted from the CIRES press release.
“With data from 73 ice and sediment core monitoring sites around the world, scientists have reconstructed Earth’s temperature history back to the end of the last Ice Age.” Quoted from the National Science Foundation press release.
“The International North Greenland Eemian Ice Drilling project results indicate that melting of the Antarctic ice sheet may have contributed more to sea level rise than melting of the Greeland ice sheet some 100,000 years ago.” Quoted from the NSF press release.
The edge of the Greenland ice sheet, near Kangerlussuaq. Peter West, NSF.
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