Geosciences Instrumentation and Data Systems, Geochemistry, Mineralogy, Petrology & Volcanology, Stratigraphy, Sedimentology and Palaeontology, Greenland’s fastest glacier reaches record speeds, http://www.the-cryosphere.net/8/209/2014/tc-8-209-2014.html, Brief Communication: Further summer speedup of Jakobshavn Isbræ, Read this press release in simplified language, Iceberg in front of Jakobshavn Isbræ calving front, Tabular iceberg in front of the Jakobshavn Isbræ terminus. Jakobshavn Isbrae in Greenland is generally considered to be the fastest glacier in the world, with speeds of up to 40 metres per day. Slide a wooden block across a table or desk. We have extended the record of flow speed on Jakobshavn Isbræ through the summer of 2013. Byrd Glacier is also moving faster than average, but unlike many other glaciers, has been sounded in the past. They expected to find a decline in ice thickness when they embarked on a study of radar observations of 402 lakes near Barrow in Alaska from the European earth resources satellites ERS-1 and ERS-2. But they add that even the annually averaged speedup over the past couple of years is nearly 3 times what it was in the 1990s. from Jakobshavn Isbrae to investigate the processes driving its dynamic evolution. Jakobshavn Isbræ, a tidewater glacier that produces some of Greenland's largest icebergs and highest speeds, reached record-high flow rates in 2012 (Joughin and others, 2014). Many glaciers in Greenland and in the Antarctic Peninsula are accelerating, which is generally attributed to warmer conditions and more meltwater lubricating the bed of the glacier. Researchers from the University of Washington and the German Space Agency (DLR) measured the dramatic speeds of the fast-flowing glacier in 2012 and 2013. Having a map of Jakobshavn’s bed has been a long-time goal of glaciologists. In 2012 and 2013, the front retreated more than a kilometre further inland than in previous summers, the scientists write in the new The Cryosphere study. PhD Student In summer 2012, Greenland's Jakobshavn Isbrae Glacier raced more than 150 feet (46 meters) per day, faster than any glacier on Earth. The Jakobshavn Glacier in Greenland spent many years moving between 5,700 and 6,700 meters per year. Located on the west coast of Greenland, Jakobshavn Isbræ is one of the most rapidly shrinking glaciers in the world. 2). Jakobshavn’s current speed of flow is about 15,000 meters per year. Abstract. media@egu.eu. Jakobshavn Isbræ is Greenland's largest outlet glacier1, draining about 6.5 per cent of the ice-sheet area, and it has been surveyed repeatedly since 1991 (ref. The EGU has a current portfolio of 15 diverse scientific journals, which use an innovative open access format, and organises a number of topical meetings, and education and outreach activities. As the glacier moves we can track changes between images to produce maps of the ice flow velocity,” says Joughin. They note that summer speeds are temporary, with the glacier flowing more slowly over the winter months. It is a non-profit interdisciplinary learned association of scientists founded in 2002. Key Facts. The speed of the Jakobshavn Isbræ — the Jakobshavn Glacier — in western Greenland was measured by researchers from the University of Washington and … These new data reveal large seasonal speedups, 30 to 50% greater than previous summers. dshean@uw.edu, Dana Floricioiu (Kindle book). Sometimes glaciers surge -- they move up to 10 times faster than their usual speed. The speed at which Jakobshavn Isbrae glacier is retreating doubled from 1996 to 2005 (Rignot and Kanagaratnam, 2006;Kerr, 2006). Subscribe to our monthly newsletter and stay up to date with the latest EGU news. INNERSELF - Watch the spectacular calving of the glacier as caught on film in the Academy Award nominated documentary Chasing Ice. Click here for more info and/or to order this book on Amazon. Here we present observations of surface velocity, mélange rigidity, and surface elevation to examine its behaviour over the last decade. support it. Please mention the name of the publication (The Cryosphere) if reporting on this story and, if reporting online, include a link to the paper (http://www.the-cryosphere.net/8/209/2014/tc-8-209-2014.html) or to the journal website (http://www.the-cryosphere.net). The unprecedented speed appears to be the fastest ever recorded for any glacier or ice stream in Greenland or Antarctica, the researchers report in the journal The Cryosphere. This visualization was created to support a talk at the Fall 2004 AGU meeting. Principal Physicist and Affiliate Associate Professor, Earth and Space Sciences A fast-moving Arctic glacier which has earned a place in history is now accelerating even more quickly. Calved icebergs from the nearby Twin Glaciers are seen floating on the water on 30 July, 2013 in Qaqortoq, Greenland. Department of Earth and Space Sciences, University of Washington At its calving front, where the glacier effectively ends as it breaks off into icebergs, some of the ice melts while the rest is pushed out, floating into the ocean. Greenland's Jakobshavn glacier dumps more water into the ocean in a day than New York City uses in one month, and that rate is double what it was merely a decade ago. Jakobshavn Isbræ (Jakobshavn Glacier) is moving ice from the Greenland ice sheet into the ocean at a speed that appears to be the fastest ever recorded. "> +1-206-221-8727 The Jakobshavn glacier is Greenland’s fastest-flowing glacier. NASA research shows that Jakobshavn Glacier, which has been Greenland's fastest-flowing and fastest-thinning glacier for the last 20 years, has made an unexpected about-face. Currently, there’s no good way for ice scientists to measure such slow velocities in one measurement. Individual glacier behavior—such as glacier speed, thickening, and retreat—responds to climate change AND to local conditions and short-term (year-to-year) variations. The Jakobshavn glacier in Greenland slowed down and gained mass. Jakobshavn Isbrae is Greenland's largest outlet glacier, draining 6.5 percent of Greenland's ice sheet area. Jakobshavn is now flowing more slowly, thickening, and advancing toward the ocean instead of retreating farther inland. On average, the glacier moved nearly three times faster in 2012 than it did in the mid-1990s. The Arctic ice sheet is thinning, and most of the planet’s glaciers are retreating as climates warm, so the Jakobshavn glacier is carrying less ice, at a faster rate, over shorter distances than ever before, and by the end of the century could have shifted 50 kilometres upstream. Notice that the flow speed of the glacier has increased significantly from 1992 to 2000. Its annual General Assembly is the largest and most prominent European geosciences event, attracting over 11,000 scientists from all over the world. These speeds are recorded in the summer, when all glaciers are more likely to be a bit friskier. She's Canadian and I am an American. Try this simple experiment for yourself. Jakobshavn Isbrae in Greenland is generally considered to be the fastest glacier in the world, with speeds of up to 40 metres per day. The 2014 EGU General Assembly is taking place is Vienna, Austria from 27 April to 2 May 2014. “As the glacier’s calving front retreats into deeper regions, it loses ice – the ice in front that is holding back the flow – causing it to speed up,” Joughin clarifies. Since measurements of Jakobshavn Isbrae were first taken in 1850, the glacier has gradually receded, finally coming to rest at a certain point for the past 5 decades. The fastest ice flow in Greenland is the glacier Jakobshavn, which moves at the blazingly slow speed of about 16 kilometers in a year—about 180 centimeters per hour. This week, we reflect on the question: "where do we go from here?" Even during the winter months, ice on the lakes of Alaska has begun to decline. Greenland Is Melting: We Need To Worry About What’s Happening On The Largest Island In The World, 3 Reasons For Information Exhaustion and What To Do About It, Watch Your Ums and Uhs -- Spoken Communication Is About More Than Words, COVID-19 Is Triggering More End-of-Life Planning – and Young People Want In On The Discussions, The Silver Lining: Reflecting on 2020's Challenges and Opportunities, 3 Ways Physical Activity Changes The Brain's Very Structure, America: Hitching Our Wagon to the World and to the Stars. Melting of Greenland's glaciers contributes to sea-level rise, 2,3,4 and is expected to fuel global warming. How and Why We Use Social Media, Why I Should Ignore COVID-19 and Why I Won't. bsmith@apl.washington.edu, David Shean Scientists estimate the glacier added about 1 millimeter to global sea levels from 2000 to 2010; its faster flow into the ocean means Jakobshavn will add even more water over the current decade. Subscribed journalists and other members of the media receive EGU press releases under embargo (if applicable) 24 hours in advance of public dissemination. As you learned in the video, the speed of the Jakobshavn glacier dramatically increased from one foot per day to 113 feet per day, largely due to meltwater seeping underneath the glacier. The researchers believe Jakobshavn Isbræ is in an unstable state, meaning it will continue to retreat further inland in the future. That's 11 … On average, the glacier moved nearly three times faster in 2012 than it did in the mid-1990s. By the end of this century, its calving front could retreat as far back as the head of the fjord through which the glacier flows, about 50 km upstream from where it is today. Will The Tropics Eventually Become Uninhabitable? The Jakobshavn Glacier, which is believed to have been the source of the iceberg that sank the Titanic in 1912, was recorded moving at roughly 10 miles per year – the fastest speed ever recorded. We relate changes in glacier speed to geometry through variations Jakobshavn Isbræ (Jakobshavn Glacier) is moving ice from the Greenland ice sheet into the ocean at a speed that appears to be the fastest ever recorded. But other satellite radar imagery has begun to reveal an ominous picture of change elsewhere in the Arctic, on the north slope of Alaska. Weßling, Germany The fastest glacier in Greenland, the Jakobshavn Isbrae (Glacier), or more correctly in Inuit: Sermeq Kujalleq, has seen an average speed increase of 300 percent since the mid-1990s and 400 percent in the peak summer season. These flow rates are unprecedented: they appear to be the fastest ever recorded for any glacier or ice stream in Greenland or Antarctica, the researchers say. The new observations of slowing for Jakobshavn Glacier in NO WAY call into question rapid climate change. Remote Sensing Technology Institute The Jakobshavn Glacier moves slower in the winter, but its average flow speed is three times what it was back in the 1990s, according to the news release. Jakobshavn Isbræ, which is widely believed to be the glacier that produced the large iceberg that sank the Titanic in 1912, drains the Greenland ice sheet into a deep ocean fjord on the coast of the island. The team used satellite data to measure the speed of the glacier as part of US National Science Foundation (NSF) and NASA studies. In summer 2012, Greenland's Jakobshavn Isbrae Glacier raced more than 150 feet (46 meters) per day, faster than any glacier on Earth. In the summer of 2012, Jakobshavn accelerated to speeds not seen before, surging at a rate of 17 kilometers (10 miles) per year. ... but many factors can speed or slow the rate of ice loss." In the summer of 2012 the glacier reached a record speed of more than 17 kilometres per year, or over 46 metres per day. On average, the glacier moved nearly three times faster in 2012 than it did in the mid-1990s. As the Arctic region warms, Greenland glaciers such as Jakobshavn Isbræ have been thinning and calving icebergs further and further inland. 2). Jakobshavn Isbrae is Greenland's largest outlet glacier, draining 6.5 percent of Greenland's ice sheet area. Jakobshavn Isbræ, an outlet glacier off the west coast of Greenland, is losing mass faster than previously thought, due to increased melt water passing through it, as reported in a new paper.The glacier’s rapid trajectory of thinning may well represent the Greenland Ice Sheet (GrIS) ice loss rate in the near future, which could mean faster sea level rise than currently projected. On average, the glacier moved nearly three times faster in 2012 than it did in the mid-1990s. Glacier elevation (b) and velocity (c) are presented as a function of distance inland from a reference position (marked by a star and labelled 'Zero'). Freeze dates in the region are now occurring on average six days later than in the past, and the ice is breaking up on average around 18 days earlier. The speed at which Jakobshavn Isbrae glacier is retreating doubled from 1996 to 2005 (Rignot and Kanagaratnam, 2006;Kerr, 2006). Munich, Germany “We are now seeing summer speeds more than 4 times what they were in the 1990s on a glacier which at that time was believed to be one of the fastest, if not the fastest, glacier in Greenland,” says Ian Joughin, a researcher at the Polar Science Center, University of Washington and lead-author of the study. Science that Changed the World: The untold story of the other 1960s revolutionby Tim Radford. The Jakobshavn Glacier, the largest glacier in Greenland is moving ice from land into the ocean at a speed that appears to be the fastest ever recorded. 2 In just one day—between July 6 and 7, 2010—satellite images showed that Jakobshavn Isbrae lost approximately 2.7 square miles (7 square kilometers) of ice area. Jakobshavn Glacier produces around 10% of all Greenland icebergs; that's around 4 billion tons of ice entering the sea. This week, we focus on seeing things differently... of looking from a different perspective, with an open mind and an open heart. “At the end of the analysis, when looking at trend analysis results, we were stunned to observe such a dramatic ice decline during a period of only 20 years”, Surdu said. "> +1-206-616-9176 The Jakobshavn Isbrae (the Danish word for glacier) is a massive river of ice from the Greenland ice sheet to an Atlantic ocean fjord and is thought – there is no way of proving this – to be the source of the giant iceberg that sank the Titanic in 1912. 2). The calving front of the glacier is now located in a deeper area of the fjord, where the underlying rock bed is about 1300 metres below sea level, which the scientists say explains the record speeds it has achieved. “We know that from 2000 to 2010 this glacier alone increased sea level by about 1 mm. Scientists track the calving rate and speed of Jakobshavn in part because the glacier is responsible for draining a large portion of the Greenland Ice Sheet. "> +49 8153 28-1763 While winterflowspeedhasnotincreased substantially overthelast threewinters, thereremains a strong seasonal variation in flow speed that coincides with a cycle of summer thinning and winter thickening. It was established in September 2002 as a merger of the European Geophysical Society (EGS) and the European Union of Geosciences (EUG), and has headquarters in Munich, Germany. In the summer of 2012 the glacier reached a record speed of more than 17 kilometres per year, or over 46 metres per day. The finding is important for many reasons. He served on the UK committee for the International Decade for Natural Disaster Reduction. The results are published today in The Cryosphere, an open access journal of the European Geosciences Union (EGU). Full citation: Joughin, I., Smith, B. E., Shean, D. E., and Floricioiu, D.: Brief Communication: Further summer speedup of Jakobshavn Isbræ, The Cryosphere, 8, 209-214, doi:10.5194/tc-8-209-2014, 2014. Greenland ; Qaasuitsup Municipality ; Ilulissat ; Things to do in Ilulissat ; Jakobshavn Glacier; Search. With accelerations like this, phrases like “glacial pace” may no longer serve as clichés of lethargic movement. According to research published in the European Geosciences Union journal The Cryosphere, summer flow speeds have doubled yet again since a Nasa measurement in 2003. EGU, the European Geosciences Union, is Europe’s premier geosciences union, dedicated to the pursuit of excellence in the Earth, planetary, and space sciences for the benefit of humanity, worldwide. In the last decade, it has more than doubled its speed, zipping down the slope at 12,600 meters per year, or just short of eight miles per year [source: NASA]. Wow - what a Glacier Now, Ive seen a few glaciers in my time, but nothing as spectacular as this!
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