This will weaken an ice shelf. The enhanced melting of ice shelves is concerning as this leads to the thinning and acceleration of their tributary glaciers which means more fresh water is injected into the surrounding ocean. It happens, but it happens over tens of thousands of years. The disintegration events were linked by The Independent newspaper in 2005 to ongoing climate warming in the Antarctic Peninsula, about 0.5˚C (0.9˚F) per decade since the late 1940s. When certain thresholds are passed, catastrophic ice shelf disintegration through iceberg calving is initiated. All company, product and service names used in this website are for identification purposes only. December 12th, 2020 by Johnna Crider Half of Antarctica’s ice shelves could collapse in a flash, Live Science reports. Except where expressly stated, content published on this site does not represent the views of eTransport News, its owners, sponsors, affiliates or subsidiaries. Instead it may float on the surface and grow larger as glacial ice behind it continues to flow into the sea. It got up to 64 degrees Fahrenheit, which is pretty much unheard of. [Show ID: 35167] An ice shelf is a large floating platform of ice that forms where a glacier or ice sheet flows down to a coastline and onto the ocean surface. The article points out that this could result from ongoing global warming. Ice-shelf melting decreases away from grounding lines and becomes negative (accretion of marine ice) on all large ice shelves and some smaller ice shelves. The focus of the world is mostly on political games, whether it’s Trump and his drama or other countries with their own issues. Although many nations that took part in the Paris agreement did so because they are concerned with the direction our planet is headed in, I think we have some severe wakeup calls coming as Antarctica’s ice shelves start to collapse. This is amplified by the warming atmosphere, and as the warming continues, this phenomenon may happen more often than not. Ice-shelf melting of 544 Gt year −1 is derived from physical and geochemical observations of meltwater outflow, glaciological field studies and modeling of the sub-ice ocean circulation. Sign up for our free daily newsletter or weekly newsletter to never miss a story. Contact us here. Highest mass loss rates are in West Antarctica and Wilkes Land, East Antarctica. Use of these names, logos, and brands does not imply endorsement. Scientists are currently implementing active ice sheets and ice shelves into climate models, with the aim of understanding sea-level rise and projecting it into the future. It is close to this area that melt rates are increasing, BAS oceanographer Keith Nicholl said, potentially threatening the stability of the ice shelf if the pressure of the Ross Island pinning point is reduced. | What Car? Map and grounding line mass change have been smoothed with a 35 km median filter for improved visualization.” Image courtesy NASA/Science. Lai and her team taught their model to recognize surface fractures in the ice using satellite images of two shelves — Larsen C and George VI — both located in the northwest region of Antarctica. Ice shelves may disintegrate by calving icebergs off the leading edge or by melting through warming from above or below. There are leaders who are corrupt and don’t care about the wellbeing of their citizens. CleanTechnica By Johnna Crider Dec 12, 2020, 9:11 pm 24 pts. Ice shelves in the Amundsen Sea (AS) and Bellingshausen Sea (BS) are melting and thinning rapidly, shown by satellite-based estimates of the last ∼ 20 years (Depoorter et al., 2013; Rignot et al., 2013; Paolo et al., 2015), contributing significantly to ongoing ocean freshening and sea level rise through a high discharge of grounded ice (Shepherd et al., 2012; Rignot et al., 2013). Ice shelves do not directly make sea level rise, but they serve to buttress the glacial ice … Two researchers walking along the Milne Ice Shelf. Without them, glacial ice enters the ocean … This is amplified by the warming atmosphere, and as the warming continues, this phenomenon may happen more often than not. Then they applied the model to a complete map of Antarctica. All articles, images, product names, logos, and brands are property of their respective owners. The research team is not done asking questions and seeking answers. Surface melting that causes fractures in the ice could threaten more than half of the continent’s floating ice platforms This is amplified by the warming atmosphere, and as the warming continues, this phenomenon may happen more often than not These buttressing ice shelves were a focal point for the study and they often have cracks on their surfaces as the shelf pushes against the curving shoreline. There are many issues in the world, but ongoing global warming and melting ice shelves will make most of them worse. Charged and umlaut partner on EV charging infrastructure testing, Tesla offers one year of free Supercharging to incentivize deliveries in record quarter attempt, 10 Electric Vehicles That Could Cross 100,000 Annual Sales In Europe, BMW Group Purchasing Steps up Sustainability Activities & Paves the way for Future e-Mobility Growth, 2022 Acura MDX, 2022 Genesis GV70, 2021 Porsche 911 GT3 Cup: This Week’s Top Photos, Orient and Ricardo to jointly develop next-generation battery management system, Lucid Motors completes construction of its EV factory, EPA confirms 250-mile range for Volkswagen ID.4, Top 8 Electric Pickup Trucks Worth Waiting For – FULLY LOADED (2021-2022). By using this site, you agree to the Terms of Use and Privacy Policy. Some are trying, but we all need to get involved, and quite frankly, people who are starving, jobless, and who are trying to survive don’t really care about Antarctica or climate change. "The difference here is the sheer size of Ross Ice Shelf, which is over 100 times larger than the ice shelves we've already seen disappear," said Poul Christoffersen from Cambridge's Scott Polar Research Institute. The article points out that this could result from ongoing global warming. Antarctica’s Larsen C Ice Shelf experienced its highest rate of melting since records began 40 years ago from 2019-2020, a new study has found. The water will push down on the fissures, driving them through to the base of the shelf in a process known as hydrofracturing. Your email address will not be published. Glaciers could disappear from several mountain ranges during this century, new report says, Greenland is melting even faster than experts thought, study finds. Best Electric Cars 2020 (and the ones to avoid) – Top 10s | What Car? Antarctica’s Melting Ice Shelves Are Dangerous . Ice shelves are the gatekeepers for glaciers flowing from Antarctica toward the ocean, according to NASA. Now, a study led by a researcher at the Georgia Institute of Technology has modeled fracture chain reactions and how much water it would take for a repeat of that rare, epic collapse. The highest melt rates occur near ice fronts and deep within sub-ice cavities. Still, massive increases in surface melting due to unusually warm weather can trigger catastrophic ice shelf collapses like that of the iconic shelf “Larsen B,” which shattered in 2002. These ice shelves are melted by the ocean, and this melting has increased in some areas, for reasons that are not fully understood. The collapse of the world's major ice shelves could lead to a. 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