Twitter. The drift of iceberg #A68 from calving of Larsen C □□ until the coast of South Georgia Islands □□: ~2.5 years & ~1700 km of drifting in the □ observed by @NASAEarth's Suomi NPP □️ World's biggest iceberg makes a run for it. Image copyright NASA/AQUA/MODIS/A.Luckman The world's biggest iceberg is about to enter the open ocean.
A68, a colossus that broke free from the Antarctic in 2017, has pushed so far north it is now at the limit of the continent's perennial sea-ice. When it calved, the berg had an area close to 6,000 sq km (2,300 sq mi) and has lost very little of its bulk over the past two and a half years. But scientists say A68 will struggle to maintain its integrity when it reaches the Southern Ocean's rougher waters. "With a thickness to length ratio akin to five sheets of A4, I am astonished that the ocean waves haven't already made ice cubes out of A68," said Prof Adrian Luckman from Swansea University, UK. "If it survives for long as one piece when it moves beyond the edge of the sea-ice, I will be very surprised," he told BBC News.
Image copyright Copernicus Data/Sentinel-3/ESA/A.Luckman. Frazer Christie sur Twitter : "Today’s Sentinel-1 acquisition reveals A68 has finally drifted away from its pivot around Bawden Ice Rise, and has rapidly drifted North. Will be interesting to track as it presumably collides with Robertson Island/Seal Nuna. Scott Polar Research Institute sur Twitter : "Update from Professor Dowdeswell on the @WeddellSeaExped: An ESA Sentinel 1 satellite radar image showing icebreaker Agulhas II (white square at end of red lines) close to the edge of Iceberg A68 in the Wendel.
Scott Polar Research Institute sur Twitter : "Update from SPRI PhD researcher Sasha Montelli on the @WeddellSeaExped: ‘Today we became the first people in the world to reach this close to iceberg A68, so we thought we'd take the opportunity to get a good. Huw Griffiths sur Twitter : "Getting very excited! So there is now a month until I head to #Antarctica with @AWI_Media to explore the life that lived on the seafloor under the huge #iceberg #A68 (formerly part of the Larsen C Ices Shelf)! @BAS_News #Polar.
Stef Lhermitte sur Twitter : "Polar winter is almost over in Antarctica, so @NASA_Landsat allows looking at detailed changes over Larsen C: iceberg #A68 on the move, grounded icebergs near Bawden ice rise, some ice loss at shelf front, no large changes in. Monster iceberg's pivot and turn. Media playback is unsupported on your device The monster Antarctic iceberg A-68 looks finally to be on the move.
For 13 months after breaking away from the White Continent's long peninsula, the trillion-tonne block did little more than shuffle back and forth on the spot. But now its southern end has swung round almost 90 degrees, indicating the berg has been caught in ocean currents. The approaching southern summer should only assist its anticipated slow drift northwards, experts say.
The Antarctic Report sur Twitter : "Finally, movement at the western end of Iceberg A-68? Yesterday’s @NASANPP satellite image shows A-68 is no longer abutting Larsen C Ice Shelf, suggesting it may no longer be grounded near Bawden Ice Rise; the eastern e. A trillion tonnes of ice on the move. #Antarctic #Iceberg #A68 is drifting northwards. Blog post by @icey_mark. Peter Neff sur Twitter : "Antarctic □□ iceberg #A68 is starting to exit the building. Let's □ at the 21st century (so far) dynamics of #LarsenC ice shelf. MODIS □️ imagery @NSIDC, 2001-2018. Crack starts forming in the last few years. This berg is uniquel. The 'monster' iceberg: What happened next? Media playback is unsupported on your device It was a wow!
Moment. The world's biggest berg, a block of ice a quarter the size of Wales, fell off the Antarctic exactly a year ago. But what then? We've gone back to find out. Seems the size of iceberg #A68 near #LarsenC is gradually shrinking with the loss of some smaller icebergs at its northern edge… A68: You can't always get what you want. Iceberg A68 calved from the Larsen C ice shelf earlier this year.
I wrote about before. As the berg calved it is starting to reveal a patch of seafloor that has been covered by thick glacial ice, and as the BAS press release says this has revealed: a mysterious marine ecosystem that’s been hidden beneath an Antarctic ice shelf for up to 120,000 years. To have the chance of making observations in an untouched environment like that is so exciting, that the British Antarctic Survey are running an expedition to investigate. You can read about it in a great piece by Victoria Gill on the BBC news site, and the brilliant Katrin Linse has done some great work with Radio 4 and the BBC Breakfast program (2hrs 20 mins in source BAS twitter account) explaining both the purpose and the work.
I was looking this morning at the recent Sentinel-1 imagery on Polarview, this is an image of A68 captured on 11 February 2018. This speckled grey is sea ice. Antarctica.cl sur Twitter : "Inicia campaña de colegas del #BAS hacia #PlataformaDeHielo #LarsenC #Antartica para estudiar #Ecosistema q estuvo 120000 años bajo el Hielo y q ahora está al descubierto por formación en Julio2017 de #IcebergA68 de 5000km2. B. #A68 Iceberg from #LarsenC creeps ever closer to Bawden Ice Rise, as seen by #Sentinel1. Shallower waters here may cause the northern tip to go aground. @ESA_EO… Iceberg #A68 near #LarsenC: the updated movie. The darker areas since Dec indicate areas with surface melt… Still one piece: Iceberg A68, Larsen C Ice Shelf #Antarctica□□ 16 Jan 2018 #Copernicus #Sentinel-3□️ #OLCI Flickr #iceberg #a68 #iceberga68… A68 takes a chunk out of Larsen C Ice Shelf (#Sentinel1) @ESA_EO. How Scientists Watched the Larsen C Ice Shelf Give Birth to an Iceberg in the Polar Night #Landsat at #AGU17.
Close up view of ice mélange inside gap, Larsen C (left) & Iceberg A-68A (right) from Op IceBridge P-3 aircraft; pic Nathan Kurtz @NASA_ICE. Plenty of ice mélange in wide gap between Iceberg A-68A and Larsen C Ice Shelf #Antarctica NASA EOSDIS view @NASAEarthData @NASAEarth. Iceberg #A68 was pushed back a bit in October after its initial drift away from #LarsenC in September @CopernicusEU @ESA_EO @MIDASOnIce.
British mission to giant A-68 berg approved - BBC News. Image copyright Copernicus Sentinel 1 Data/BAS UK scientists will lead an international expedition to the huge new iceberg that recently calved in the Antarctic.
A-68, which covers an area of almost 6,000 sq km, broke away in July. Researchers are keen to investigate the seafloor uncovered by the trillion-tonne block of ice. Previous such ventures have discovered new species. The British Antarctic Survey has won funding to visit the berg and its calving zone in February next year.
It will use the Royal Research Ship James Clark Ross. Scientists to visit hidden Antarctic ecosystem after giant iceberg calving - News - British Antarctic Survey. Iceberg A68 near #LarsenC Ice Shelf #Antarctica 02 Oct 2017 #Sentinel-1A □️ #Copernicus Rendered in @sentinel_hub #EOBrowser. The sun is finally rising in Antarctica after a long winter, meaning we get well-lit images of the new giant iceberg. @PeterGWeather @icey_mark Latest S1 image - just about see the crack. No longer under the cloak of 2017 polar night, scientists get 1st sunlit view of the iceberg from Larsen C ice shelf.
Suomi NPP satellite image today shows northern end of Iceberg A-68A has drifted further from Larsen C Ice Shelf #Antarctica @NASAEarth @NOAA. Area of ocean left exposed when Iceberg A-68 broke free from LarsenC Ice Shelf gains protection for scientific study. Special protection for marine area exposed by Larsen C iceberg that broke off in July @CCAMLR1 #larsenc. Yesterday's Suomi NPP satellite image; winds pushing southern end of Iceberg A-68A away from Larsen C Ice Shelf #Antarctica @NASAEarth @NOAA. Offshore foehn winds have opened up the sea ice giving A68 the best chance yet to start sailing away from Larsen C. #Sentinel1 8th September.
*****Gap widens to 7.5km between mega Iceberg A-68A & Larsen C Ice Shelf; Sentinel1 satellite image from 15 Aug @esa @CopernicusEU pic @ESA_EO. Excellent piece on Antarctic fieldwork and thinning of ice shelves and retreating glaciers. #climatechange. Drifting of mega Iceberg A-68A from Larsen C Ice Shelf #Antarctica Sentinel1 satellite image from 11 Aug @esa pic @StefLhermitte.
Happy birthday C.A. Larsen, norwegian explorer, discovered the first fossils in #Antarctica. See the exhibition about him @FramMuseum. Final breaking point where A-68A iceberg calved away from Larsen C, 16 days after rift broke thru @deimosimaging. *****Antarctica's collapsing ice shelves. Mélange (aggregation of sea ice & icebergs) in 2km gap between A-68A iceberg and Larsen C Ice Shelf @deimosimaging. *****Satellite images show the story of iceberg #A68 #LarsenC Read about the importance of ice shelves in @NatureClimate. A-68A iceberg spawns smaller icebergs while remaining cracks on Larsen C Ice Shelf continue to grow @BAS_News @ESA. After calving LarsenC Ice Shelf may lose contact with pinning pt, accelerating ice speed, destabilising further @ESA. Antarctica's Larsen C ice shelf New rift detected #LarsenC Heading toward the Bawden Ice Rise. Icerberg #A68's path is still uncertain. More importantly: how will #LarsenC #IceShelf respond to being 10% smaller?
Dr Anna Hogg & British Antarctic Survey are using satellites to track the giant Larsen C iceberg @SEELeeds @BAS_News. What happened next to the giant Larsen C iceberg? The fate of the giant iceberg that broke free from Antarctica’s Larsen C ice shelf last month has been revealed.
Twice the size of Luxembourg, the trillion-tonne iceberg known as A68 was found to have broken off the ice shelf on 12 July after months of speculation about a rift which had been growing for years, with the iceberg “hanging by a thread” for weeks. At 5,800 sq km it is one of the largest icebergs ever recorded, with its calving leaving the Larsen C ice shelf about 12% smaller in area and at its lowest known extent. “The really interesting thing is that it didn’t just break through in one clean shot, it formed a lace-network of cracks first and then we were all waiting on tenterhooks to see which one would be the final pathway,” said Dr Anna Hogg, an expert in satellite observations of glaciers at the University of Leeds and member of the Centre for Polar Observation and Modelling.
Interested in what is happening to the world famous #Antarctic iceberg? Read more here @ICASLeeds. We captured a new image of the iceberg that split off from the Antarctic Peninsula’s Larsen C ice shelf @NASAEarth. Mélange at southern end of A-68A (floating aggregation of sea ice & icebergs) White = surface is warmest @NASA @USGS. Back-&-forth movement of A-68A iceberg causes rebounding at northern end, leading to more fractures on both Larsen C Ice Shelf & berg @ESA. A Fracturing Berg in the Polar Night #NASA.
Landsat "sees in the dark" the evolution of the 2,240-square-mile iceberg from #LarsenC in Antarctica. Changing names: as smaller icebergs have broken away from A-68, main iceberg is now officially reclassified as A-68A. Satellites Capture Break-Off of Massive Iceberg in Antarctica Copernicus Sentinel-1 #LarsenC. Antarctica's Larsen C ice shelf New rift detected #LarsenC Heading toward the Bawden Ice Rise. The Larsen C Iceberg Is Already Cracking Up. One of the largest iceberg calves. Scientists to monitor trajectory of the 'white wanderer'. #Antarctica, #Iceberg. A quick blog update on how Larsen C is responding to the calving of Iceberg A68. #Sentinel1 InSAR shows that network of cracks may still be growing on #LarsenC @ESA_EO satellites will continue to monitor #Antarctica.
New crack on eastern side of Iceberg A68 carves out large chunk of ice, as berg moves further away from #LarsenC Ice Shelf @deimosimaging. Drifting Antarctic iceberg A-68 opens up clear water #LarsenC Deimos-1 satellite gets the picture. Our Antarctica maps show the Larsen Ice Shelf's stunning decades-long decline. The gap widens; Sentinel-3A infrared image indicates Iceberg A-68 drifting slightly away from LarsenC Ice Shelf @esa. Comparison between #A68 #LarsenC iceberg and A68 Darlington-Edinburgh road #coincidence @BAS_News @AntarcticReport @NLSMaps @adrian_luckman. *****Plagiarised?! Just for @chrisenorth, here’s a size comparison of A68 and the A68. #LarsenC: #Behemoth birth seen in this @CopernicusEU #SLSTR #Sentinel3 thermal band animation @ESA_EO. More at. In penguin news.... To give a sense of the true dimensions of the Larsen C iceberg, here's an animation based on real data, with something familiar for scale.
Satellite image of the Larsen C Ice Shelf in #Antarctica shows birth of an iceberg the size of Norfolk. *****Larsen C iceberg: theconversation. One of the largest icebergs ever recorded has just broken away from the Larsen C Ice Shelf in Antarctica.
Over the past few years I’ve led a team that has been studying this ice shelf and monitoring change. We spent many weeks camped on the ice investigating melt ponds and their impact – and struggling to avoid sunburn thanks to the thin ozone layer. Our main approach, however, is to use satellites to keep an eye on things. We’ve been surprised by the level of interest in what may simply be a rare but natural occurrence. Because, despite the media and public fascination, the Larsen C rift and iceberg “calving” is not a warning of imminent sea level rise, and any link to climate change is far from straightforward.
Ice shelves are found where glaciers meet the ocean and the climate is cold enough to sustain the ice as it goes afloat. For the following century, the shelf, or what we now know to be a set of distinct shelves – Larsen A, B, C and D – remained fairly stable. Nature at work. A-68 - official name of mega iceberg from Larsen C confirmed by US National Ice Center, dimensions: 155km x 46km. The last piece of the #LarsenC breakup is nicely shown in high resolution in #Sentinel1. Farewell iceberg A68! @ESA_EO @MIDASOnIce. Landsat Spots Birth of Iceberg A-68 #NASA. *****How big is the Larsen C iceberg? So groß ist der Eisberg im Vergleich zu Ihrer Stadt. Der Eisberg ist mit 175 Kilometern Länge und einer Breite von bis zu 50 Kilometern einer der größten Eisgiganten, die Forscher in den vergangenen drei Jahrzehnten registriert haben.
Der über eine Billion Tonnen schwere und 5800 Quadratkilometer große Koloss treibe nun nach Norden und werde wohl zwei, drei Jahre brauchen, bis er geschmolzen sei, teilte das Alfred-Wegener-Institut für Polar- und Meeresforschung in Bremerhavener mit. Eine unmittelbare Gefahr für Menschen geht von ihm nicht aus. Inwieweit der Klimawandel eine Rolle beim Abbruch des Eisberges gespielt hat, ist nach Forscherangaben unklar. Der nun abgebrochene Koloss war bislang ein Teil vom Larsen-C-Schelfeis. *****Great animation added to my story on the Larsen C iceberg by @PostGraphics. The most depressing misunderstanding of how science works I've seen in a long time. WARNING. It will infuriate you all day. Where will Iceberg A68 drift? currently floating in depths of 350m-500m Weddell Sea; drifting into Sth Atlantic could create shipping hazard. How big is that giant iceberg you’ve been reading about today? It depends where you get your news from.
*****Further updated #Sentinel animation showing development of the rift from May 2016 until the #bigberg calving in July 2017. @ESA_EO. Fortune. Prof David Vaughan explains what has happened to the Larsen C Ice Shelf in #Antarctica in this short film. Some comparison geography for the new gigantic iceberg that just split off from Antarctica's Larsen C Ice Shelf via. @MichaelEMann See this paper Area in blue is not buttressing inland ice streams. A few things to note about this massive #Antarctica iceberg. #1: most scientists think it's natural. but some suspect a climate connection. Larsen C Ice Shelf was 4th largest ice shelf in the world (48,600 km²); having just lost 12% of its total area, it’s now the 5th largest.
A view of the newly-formed #larsenc iceberg in #Antarctica, taken at 03:00 UTC this morning by the @NASANPP satellite. Iceberg twice size of Luxembourg breaks off Antarctic ice shelf. A giant iceberg twice the size of Luxembourg has broken off an ice shelf on the Antarctic peninsula and is now adrift in the Weddell Sea.
EOSDIS Worldview. Larsen C calves trillion ton iceberg. A one trillion tonne iceberg – one of the biggest ever recorded - has calved away from the Larsen C Ice Shelf in Antarctica.
The calving occurred sometime between Monday 10th July and Wednesday 12th July 2017, when a 5,800 square km section of Larsen C finally broke away. The iceberg, which is likely to be named A68, weighs more than a trillion tonnes. Its volume is twice that of Lake Erie, one of the Great Lakes. The final breakthrough was detected in data from NASA’s Aqua MODIS satellite instrument, which images in the thermal infrared at a resolution of 1km, and confirmed by NASA’s Suomi VIIRS instrument. The development of the rift over the last year was monitored using data from the European Space Agency Sentinel-1 satellites – part of the European Copernicus Space Component. The iceberg weighs more than a trillion tonnes (1,000,000,000,000 metric tonnes), but it was already floating before it calved away so has no immediate impact on sea level. Sea levels could be about to rise by 10 cm. Giant iceberg splits from Antarctic. Image copyright BAS One of the biggest icebergs ever recorded has just broken away from Antarctica.
The giant block is estimated to cover an area of roughly 6,000 sq km; that's about a quarter the size of Wales. An US satellite observed the berg on Wednesday while passing over a region known as the Larsen C Ice Shelf. Scientists were expecting it. Ice shelves 'need to calve icebergs' News navigation Sections Have Your Say Media player Media playback is unsupported on your device Jump media player Media player help.