billvon 3,111 #1 February 7, 2017 The Larsen ice shelves are some of the largest ice shelves in Antarctica. Larsen A collapsed in 1995; Larsen B went in 2002. Now Larsen C, the largest, is about to go. ================ A Crack in an Antarctic Ice Shelf Grew 17 Miles in the Last Two Months By JUGAL K. PATEL FEB. 7, 2017 A rapidly advancing crack in Antarctica’s fourth-largest ice shelf has scientists concerned that it is getting close to a full break. The rift has accelerated this year in an area already vulnerable to warming temperatures. Since December, the crack has grown by the length of about five football fields each day. The crack in Larsen C now reaches over 100 miles in length, and some parts of it are as wide as two miles. The tip of the rift is currently only about 20 miles from reaching the other end of the ice shelf. Once the crack reaches all the way across the ice shelf, the break will create one of the largest icebergs ever recorded, according to Project Midas, a research team that has been monitoring the rift since 2014. Because of the amount of stress the crack is placing on the remaining 20 miles of the shelf, the team expects the break soon. “The iceberg is likely to break free within the next few months,” said Adrian J. Luckman of Swansea University in Wales, who is a lead researcher for Project Midas. “The rift tip has moved from one region of likely softer ice to another, which explains its step-wise progress.” Ice shelves, which form through runoff from glaciers, float in water and provide structural support to the glaciers that rest on land. When an ice shelf collapses, the glaciers behind it can accelerate toward the ocean. Higher temperatures in the region are also helping to further the ice shelf’s retreat. If the ice shelf breaks at the crack, Larsen C will be at its smallest size ever recorded. That would also leave the ice front much closer to the ice shelf’s compressive arch, a line that scientists say is critical for structural support. If the front retreats past that line, scientists say, the northernmost part of the shelf could collapse within months. It could also significantly change the landscape of the Antarctic peninsula. . . . . The Larsen A and B ice shelves disintegrated in 1995 and 2002, though both were drastically smaller than Larsen C. Neither contributed significantly to global sea level rise, however, because they were already floating above water, and the glaciers behind them did not contain a substantial volume of ice. According to Dr. Rignot, the collapse of Larsen C would add only a tiny amount of water to the global sea level. Of greater concern to scientists is how the collapse of ice shelves can affect the glaciers that flow behind them, because the melting of those glaciers can cause much higher levels of ocean rise. Scientists see the impending Larsen C collapse as a warning that much larger amounts of ice in West Antarctica could be vulnerable. =============== Quote Share this post Link to post Share on other sites
winsor 236 #2 February 7, 2017 Repent. The end is near. Quote Share this post Link to post Share on other sites
gowlerk 2,275 #3 February 8, 2017 winsorRepent. The end is near. The hell with that. Let the band play on. The road goes on forever and the party never ends.Always remember the brave children who died defending your right to bear arms. Freedom is not free. Quote Share this post Link to post Share on other sites
yoink 321 #4 February 8, 2017 winsorRepent. The end is near. I'm not done sinning yet. Quote Share this post Link to post Share on other sites
normiss 892 #5 February 8, 2017 Don't let the invisible dude's death be a waste. Party on Garth. Quote Share this post Link to post Share on other sites
normiss 892 #6 February 8, 2017 Really have to applaud the efforts the Chinese are putting into this hoax. It's become entirely believable now! Quote Share this post Link to post Share on other sites