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In 1966, US Army scientists drilled down through nearly a mile of ice in northwestern Greenland -- and pulled up a fifteen-foot-long tube of dirt from the bottom. Then this frozen sediment was lost in a freezer for decades. It was accidentally rediscovered in 2017. In 2019, University of Vermont scientist Andrew Christ looked at it through his microscope -- and couldn't believe what he was seeing: twigs and leaves instead of just sand and rock. That suggested that the ice was gone in the recent geologic past -- and that a vegetated landscape, perhaps a boreal forest, stood where a mile-deep i...

Story highlights The discovery of plants beneath ice in Greenland reveals that the region underwent melting at a scale similar to what's happening right now Scientists recently found plants beneath ice in Greenland, essentially rewriting what we know about previous warming periods in Earth's history. The discovery of plants beneath ice reveals that the region underwent melting at a scale similar to what's happening right now. Within the last million years, the region underwent melting, similar to what we have done to the planet, or as scientists call it - climate change. The plants which were...

Greenland Ice Sheet is More Sensitive to Climate Change than Previously Understood Written by AZoCleantechMar 16 2021 In 1966, US Army scientists drilled down through nearly a mile of ice in northwestern Greenland--and pulled up a fifteen-foot-long tube of dirt from the bottom. Then this frozen sediment was lost in a freezer for decades. It was accidentally rediscovered in 2017. In 2019, University of Vermont scientist Andrew Christ looked at it through his microscope--and couldn't believe what he was seeing: twigs and leaves instead of just sand and rock. That suggested that the ice was gone...

BENEATH THE ICE The material for the new PNAS study came from Camp Century, a Cold War military base dug inside the ice sheet far above the Arctic Circle in the 1960s. The real purpose of the camp was a super-secret effort, called Project Iceworm, to hide 600 nuclear missiles under the ice close to the Soviet Union. As cover, the Army presented the camp as a polar science station. © University of VermontThe military mission failed, but the science team did complete important research, including drilling a 4560-foot-deep ice core. The Camp Century scientists were focused on the ice itse...

The 'Zealandia Switch': Missing Link in Big Natural Climate Shifts? The Southern Hemisphere may be the missing link in answering longstanding questions about how ice ages wax and wane, according to a new study. There, say researchers, complex interactions among the westerly wind system, the Southern Ocean and the tropical Pacific can trigger rapid global changes in atmospheric temperature. The mechanism, dubbed the Zealandia Switch, relates to the position of the Southern Hemisphere westerly wind belt—the strongest wind system on Earth—and the continental masses of the southwest Pacific O...