The melt rate averaged 2 to 5.4 meters a year, according to the study, less than previous models had projected. The scientists found even though the glacier is receding, the rate of melting beneath much of the flat part of the ice shelf was lower than expected. The results of the research reveal “a very nuanced and complex picture,” Peter Davis, an oceanographer at the British Antarctic Survey and a lead author on the other paper, told CNN. It was able to “swim up to these really dynamic places and take data from the sea floor all the way to the ice,” Britney Schmidt, an associate professor at Cornell University and a lead author on one of the papers, told CNN. The remotely-operated vehicle took images and recorded information about the temperature and salinity of the water, as well as ocean currents. The instruments included a torpedo-like robot called Icefin, which allowed them access to areas previously almost impossible to survey. Peter Davis/British Antarctic Survey/ITGC The borehole drilling site on Thwaites Glacier. Using a hot water drill, they bored a hole nearly 2,000 feet (600 meters) deep into the ice and, over a five-day period, sent down various instruments to take measurements from the glacier. To better understand the reshaping of the remote coastline, a team of US and British scientists from the International Thwaites Glacier Collaboration traveled to the glacier in late 2019. While it could take hundreds or thousands of years, the ice shelf could disintegrate much sooner, triggering a retreat of the glacier which is both unstable and potentially irreversible. But the Thwaites is also acting like a natural dam to the surrounding ice in West Antarctica, and scientists have estimated global sea level could ultimately rise around 10 feet if the Thwaites collapsed. The complete collapse of the Thwaites itself could lead to sea level rise of more than two feet (70 centimeters), which would be enough to devastate coastal communities around the world. Particularly rapid melting happens at the point where the glacier meets the seafloor, which has retreated nearly nine miles (14 kilometers) since the late 1990s, exposing a larger slice of ice to relatively warm ocean water. Britney Schmidt/ITGCĪs climate change accelerates, the Thwaites Glacier is rapidly changing.Įvery year it sheds billions of tons of ice into the ocean, contributing about 4% of annual sea level rise. That would be the last thing CNN played before we - before we signed off.Cracks in Thwaites Glacier in 2020. Then, as things cranked up, I asked if they’d play ‘Nearer, My God, to Thee’ to put on videotape just in case the world ever came to an end. So we got the combined Armed Forces marching bands together - the Army, Navy, Marine & Air Force bands - & took them out to the old CNN headquarters & we had them practice the National Anthem for a videotaping. “But with CNN - a 24-hour-a day channel - we would only sign off once & I knew what that would mean. “Normally, when a TV station begins & ends the broadcast day, it signs on & off by playing the National Anthem,” he said. In 1988, a New Yorker article talked about the signoff tape’s existence, quoting Turner’s explanation of how it came to be. “We’ll play the National Anthem only one time, on the first of June, and when the end of the world comes, we’ll play ‘Nearer, My God, to Thee’ before we sign off.” “We’ll be on, and we will cover the end of the world, live, and that will be our last event,” Turner once said, according to Jalopnik. TV Ratings: CNN Gets Big Boost With Trump Town Hall
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