“Taken as a whole, the generalized retreat of ice shelves along the Antarctic Peninsula, and especially the thinning elsewhere such as at Thwaites Glacier, shows clearly that climate change is causing accelerating mass loss from Antarctica to the oceans,” he said. As a fifth-year Ph.D. student at Columbia University’s Lamont-Doherty Earth Observatory, studying how the Earth’s climate behaved in the past […] This story parallels the lives for many companies. Melt and percolation through the weak firn layer bring most of the freeboard volume to the melting point. All Rights Reserved. Antarctica's colossal Thwaites Glacier is melting fast -- and scientists may have discovered why By Emma Reynolds, CNN Updated 12:19 PM ET, Wed September 9, 2020 The findings could also help scientists better understand precipitation, Hong said. Not surprisingly, they found that the bottom had the slowest melt rate. This allows ocean wave action around the edges to penetrate the freeboard portion of the berg. All around us were jagged, brill… Find Glaciers Melting Latest News, Videos & Pictures on Glaciers Melting and see latest updates, news, information from NDTV.COM. Sun’s group combined physical experiments, numerical simulations, and theoretical models to investigate the connection between the ice and (turbulent) convective flows. While many icebergs break off from the normal processes of Antarctica’s coastal glaciers flowing into the sea, Luckman said the changes in the west of Antarctica appear to be caused by a warming climate. At the 73rd Annual Meeting of the American Physical Society’s Division of Fluid Dynamics, Hester presented results from his group’s experiments aimed at understanding how melting alters the face-changing boundary of a shrinking iceberg – and how those alterations in turn affect the melting. Some recent scientific models predict that Antarctica’s melting alone could cause sea levels to rise by almost 2 feet by 2100. Icebergs form with a wide range of shapes and sizes, Hester said, and distinct thermodynamic processes affect different surfaces. It was about 17-miles long and 25 miles wide, with an area of 4,250 square miles, nearly as big as Connecticut. “Ice deforms as it melts,” said physical oceanographer Claudia Cenedese, who has worked with Hester on the project. Iceberg B-49, is about twice the size of Washington D.C. We just approached within a couple of miles of the new giant #PineIslandGlacier iceberg B-49 (the white wall behind smaller icebergs and brash ice in the foreground) on @GlacierThwaites @GlacierOffshore cruise #NBP2002 aboard RV Nathaniel B Palmer. To many companies are comfortable with the way things are and don’t want to change. A lake may possess layers of water of differing densities and temperatures. Icebergs are the dominant source of freshwater in the fjords of Greenland – and a significant contributor to freshwater loss in Antarctica. A supersized iceberg has broken off East Antarctica. ‘Teetering at the edge’: Scientists warn of rapid melting of Antarctica’s ‘Doomsday glacier’ Thwaites glacier is losing ice at an accelerating rate, threatening catastrophic sea-level rise However, iceberg melt is the combined result of many processes that vary over time and space along with the iceberg's physical properties. Share. One day a curious penguin noticed signs that their beloved home, the iceberg, was melting. News. Explore more on Glaciers Melting. And scientists are warning about signs of climate change. Glaciologists have raised alarm that a massive new iceberg, designated B-49, may be a result of melting caused by relatively warm water eating away at the ice that surrounds the frozen continent. Iceberg B-15 first broke away from Antarctica's Ross Ice Shelf in March 2000. Antarctica’s Pine Island Glacier is one of the most closely watched pieces of ice on Earth. “It makes these very weird shapes, especially on the bottom, like the way the wind shapes a mountain on a longer time scale.”. Working on a grant from the Natural Science Foundation of China with Ziqi Wang from Tsinghua University, Enrico Calzavarini from the University of Lille in France, and Federico Toschi from Eindhoven University of Technology in the Netherlands, Sun showed how the formation of ice on a lake is closely tied to the fluid dynamics of the water beneath. Other studies discussed at the conference focused on ice formation, rather than melting. Our small motor dinghy was carrying seven passengers – a polar guide, two Greenpeace activists, two journalists, a camera operator and a scientist specialising in marine acoustics. By American Physical Society Glaciologists have raised alarm that a massive new iceberg, designated B-49, may be a result of melting caused by relatively warm water eating away at the ice that surrounds the frozen continent. The team used microbiology techniques to analyse the remaining genetic material in the ice samples to look at its likely impact on today’s microbial groups and which viruses thrived in climates and environments throughout history. Keep up with the latest scitech news via email or social media. “This is probably caused by the incursion of warmer waters into the area, which may be related to climate change.”. Iceberg - Iceberg - Erosion and melting: Most of the erosion taking place on Antarctic icebergs occurs after the bergs have emerged into the open Southern Ocean. The base, submerged in water, doesn’t melt in the same way as the side. N.B. Now, researchers from the US and South Korea have run climate simulations that include the "iceberg effect" and found that melting icebergs could … “It has been identified as an area that is changing rapidly.”. At the 73rd Annual Meeting of the American Physical Society's Division of Fluid Dynamics, researchers shared new insights into melting icebergs and lake ice formation. Copyright © 1998 - 2020 SciTechDaily. We therefore think that icebergs are an important component of Greenland’s fjords and should be included in studies of ice sheet-ocean interaction.” An international scientific team has just completed its first major field season on the giant Thwaites Glacier, about 200 miles from Pine Island Glacier, beside the Amundsen Sea in West Antarctica. Melting icebergs causing sea level rise. CNN's Clarissa Ward visits Greenland to learn about how quickly the ice sheet is melting and the effect it has on the planet. An iceberg four miles (six kilometers) wide has broken off from a glacier in eastern Greenland and scientists have captured the dramatic event on video. For years, scientists have tracked as chunks of the glacier have broken off, an awe-inspiring event known as “calving” that happens naturally.
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