Here’s the take-home message from this month’s original video by independent videographer Peter Sinclair for Yale Climate Connections: Let’s hope Thwaites in Antarctica waits. Thwaites Glacier ice shelf extends about 15 kilometers beyond the grounding line. But if Thwaites melts enough that it lifts off, the ice sheet will be exposed, too. Below is a schematic figure of an ice shelf and a grounding line. So long as Thwaites connects with the earth beneath it, the glacier will block warm waters from creeping up to the broader, thicker ice — the Western Antarctic Ice Sheet — sitting behind it. New seafloor maps reveal the first clear view of a system of channels that may be helping to hasten the demise of West Antarctica’s vulnerable Thwaites Glacier. By Peter Sinclair | Friday, November 20, 2020. Thwaites Glacier today is rapidly losing mass in response to changing atmospheric and oceanic conditions. The Thwaites Glacier also slows the melting of other glaciers, which could raise sea levels an additional 8 feet if they melted. The ice shelf is thinning rapidly and the grounding line is retreating. Read all of the reporting from the eight-week expedition. Close Before/after view. The International Thwaites Glacier Collaboration is making rapid progress, but the glacier is also changing rapidly, posing problems for communications about risk. Teams were due to head back to the glacier this austral summer, but the location’s remoteness means the risks are too great should anyone fall ill. Once the coronavirus outbreak has been properly contained, the scientists will return, however. It’s thought that a sea level rise of 60cm would swamp coastal towns and cities around the world. It makes a retreat of the grounding line. Although, those small icebergs had been grounded to the South before being pushed into their current location by the movement of B22-A so that spot may not be shallower than any other nearby location. Scientists predict its ice sheet may break off, increasing sea levels. Thwaites glacier in Antarctica might be past the point of no return. Over the past 30 years, the amount of ice flowing out of the region has nearly doubled, and computer models show that over the next several decades, the glacier may lose ice even more rapidly. Runaway sea-level rise resulting from retreat of Antarctica's Thwaites glacier depends on humans' substantially cutting GHG emissions. Thwaites Glacier is roughly the size of UK (176 x10 3 km 2). Instrumentation. Simplified grounding line image of an ice sheet. Thwaites Glacier in West Antarctica. Thwaites Glacier is located on the Western border of the Antarctic continent. Nature 458, 295-296. Thwaites Glacier, roughly the size of Florida, is melting at an increasingly fast rate. If you took off in an airplane from El Paso, Texas and flew due south — across about 590 miles (950 kilometers) of western Mexico and 5,700 miles (9,200 km) of Pacific Ocean — you’d see it out your window as a white expanse with sheer cliffs where it meets open water. When glaciers melt and lose weight, they float off the land where they used to be situated. “It’s amazing to go to a place like Thwaites to see the changes taking place right before your eyes,” said Dr Hogan. Thwaites Glacier is a vast brick of ice flowing into Pine Island Bay in western Antarctica. ; Thwaites Glacier is closely watched for its potential to raise sea levels. Because of its size (1.9 lakh square km), it contains enough water to raise the world sea level by more than half a meter. It covers an area of 192,000 sqkm — in comparison, Tasmania is 68,401 sqkm and Victoria is 227,444 sqkm. “Thwaites is a terrifying glacier,” Anandakrishnan says simply. Prof Richard Alley Richard Alley is a geologist who investigates the relationship between the Earth’s cryosphere — where water is present in solid form at the surface — and climate change. Thwaites Glacier is an important area of study for scientists as it is particularly susceptible to climate and ocean changes. The Thwaites has moved … Thwaites Glacier Mass Balance . The gigantic Thwaites glacier covers 293,000sq kms — about half the area of the United Kingdom. A large area of the West Antarctic Ice Sheet flows to the ocean via Thwaites Glacier, which extends over 192,000 sq kms (74,000 sq miles), an area the size of Florida or the island of Britain. Thwaites Glacier sometimes referred to as the Doomsday Glacier, is an unusually broad and fast Antarctic glacier flowing into Pine Island Bay. The craggy face of Thwaites loomed a few hundred feet away, but seemed almost close enough to touch, or at least within shouting distance. Thwaites Glacier: Location: Antarctica: Detailed Location : Dotson Ice Shelf: Location: Antarctica: Detailed Location : Crosson Ice Sheld: Top. Along the 150-kilometer ice front, the satellite images show two different types of ice shelves. The red dot shows the approximate location of the Nathaniel B. Palmer research vessel each day. Figure 1: Map showing the location of Thwaites Glacier in West Antarctica, as well as the main geographic focus of the 8 projects involved in the International Thwaites Glacier Collaboration (ITGC). Under the huge Thwaites Glacier in Antarctica is an unexpected, enormous cavern. Thwaites Glacier, also known as the "doomsday glacier", is reported to be melting quicker than previously thought - scientists are now trying to find out why. ... That’s more than 2 degrees Celsius (3.6 degrees Fahrenheit) warmer than that location’s freezing point owing the chemistry of saltier water. Its melting accounts for 4 percent of global sea-level rise. Watch the video. … Sensor(s): ACCELEROMETERS; GPS > Global Positioning System; GRAVIMETERS; LRGM > Lacoste-Romberg Gravity Meter; Data Collection: Data was collected using the BAS twin otter VP-FBL, equipped for aerogeophysical surveys. Its melt already accounts for about 4% of global sea rise, Georgia Tech reported. It is also one of the most rapidly changing glaciers in Antarctica. The glacier terminus is nearly 120 km wide, and the bed of the glacier reaches to >1000 m below sea level. Goto first page. A file photo of the Thwaites Glacier in Antarctica, known as the 'Doomsday Glacier'. Along with Pine Island Glacier, Thwaites Glacier has been described as part of the "weak underbelly" of the West Antarctic Ice Sheet. Such increases threaten flooding in coastal cities around the world, including the East Coast of the United States. It is predicted that it will gradually melt, leading to an irreversible collapse over the next 200 to … Thwaites Glacier is nicknamed the Doomsday Glacier because of the deadly impact its melting could have on our planet. The strong correlation of abnormal ice sheet melting with the location of the Pine Island and Thwaites Glaciers and underlying Marie Byrd Mantle Plume is undeniable. Logged Stephan. Thwaites was nearly seven stories high here, at its eastern edge, and the bluish cliff glowed against the grayscale sky.It was snowing, and foggy, and the glacier appeared like something out of this world. That exposes more of a glacier’s underside to seawater, increasing the likelihood it will melt faster. Scientists may just have identified Thwaites Glacier's Achilles heel. Thwaites Glacier is a vast brick of ice flowing into Pine Island Bay in western Antarctica. The grounding line is where the glacier transitions from resting on the bedrock to a floating ice shelf in the Amundsen Sea. This is the last in a series of deep dives into the science and people of the Nathaniel B. Palmer’s 2019 voyage to Thwaites Glacier in West Antarctica. Posted February 06, 2019 14:39:25 The Thwaites Glacier is currently responsible for about 4 per cent of global sea level rise. Thwaites Glacier covers 74,000 square miles—an area the size of Florida—and is particularly susceptible to climate and ocean changes. From: Huybrechts et al., 2009. Nilas ice; Posts: 1414; Liked: 504; Likes Given: 243 ; Re: Thwaites Glacier Discussion « Reply #280 on: May 18, 2020, 06:34:30 PM » I want to remind you about my posting … The eastern ice shelf looks like a large solid piece of ice. Pine Island Glacier and Thwaites Glacier in the Amundsen Sea Embayment are among the fastest changing outlet glaciers in West Antarctica with large consequences for global sea level. It once held 14 billion tons of ice. … Credit: ITGC website. The location of the line is a pointer to the rate of retreat of a glacier. The location of the line is a pointer to the rate of retreat of a glacier. If it collapsed completely it could raise sea levels by 60cm. Thwaites Glacier. Antarctica with/without ice. Pine Island Glacier and Thwaites Glacier together account for 3% of grounded ice-sheet area, but they receive 7% of Antarctica’s snowfall 1. The Thwaites Glacier is one of the most dangerous glaciers in the world, and scientists are eager to travel to Antarctica to study it. (NASA) "I think this is a big step towards helping understand that," he added. The massive Thwaites Glacier slides down from the West Antarctic ice sheet into the Amundsen Sea, which part of the glacier floats over. Pine Island and Thwaites Glacier have retrograde beds below sea level which makes them prone to marine ice sheet instability . 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