Iceberg B-49 calved from the Antarctic glacier in February 2020. [8], Im Jahre 2018 veröffentlichten Wissenschaftler der University of Rhode Island's Graduate School of Oceanography eine Studie, nach der im oberen Bereich des Gletschers, wahrscheinlich im Hudson-Gebirge, unter dem Eis eine bedeutende vulkanische Wärmequelle liegt. "Older maps suggested a shallower canyon, … (Antarctic Research Series 77.) The fieldwork is part of a scientific… Ein solcher Vorgang ist bei einem solchen Gletscher allerdings nicht ungewöhnlich und nicht notwendigerweise auf die Erderwärmung zurückzuführen. Figure 1Overview map displaying the location of features and regions referred to in the text.The catchment drained by contemporary Pine Island and Thwaites glaciers is highlighted in green. The Pine Island glacier has retreated roughly 50 kilometers in the past 70 years. Image Information. Share on Facebook; Share on Twitter; Share on Reddit; Share on Google+; Share on Pinterest; Embed; www.youtube.com. It is possible that a retreat of the PIG may accelerate ice discharge from the WAIS interior. A comparison of these new maps with satellite images of the ice stream reveals why the glacier suddenly retreated toward the coast: at important points, it had lost contact with the ground, as the experts report in 'The Cryosphere', an online journal of the European Geosciences Union. Laut diesen Simulationen wird der jährliche Masseverlust des Gletschers, der von 1992 bis 2011 noch bei 20 Gigatonnen pro Jahr gelegen hatte, in den nächsten 20 Jahren 100 Gigatonnen pro Jahr betragen – dies entspricht einem Meeresspiegelanstieg von 3,5 bis 10 mm in diesem Zeitraum. Also in May 2007, a crack in Pine Island becomes visible. The catchments of Pine Island Glacier and Thwaites Glacier in the Amundsen Sea Embayment are two of the largest, most rapidly changing, and potentially unstable sectors of the West Antarctic Ice Sheet. Watch the glacier’s ice front as it retreats and sheds some notable icebergs over the past two decades. They are also neighboring outlets, separated by the topographically unconfined eastern shear margin of Thwaites Glacier and the southwest tributary of Pine Island Glacier. Latitude: -75° 09' 60.00" S Longitude: … But for most of the ice shelves in the Antarctic, we know very little about the features of the underlying seafloor. The black box shows the portion of the Transantarctic Mountains (TAM) containing Wright Valley, the Royal Society Range, the Convoy Range, and the Asgard Range, in which channel features have been observed. Die Vergangenheit hat gezeigt, dass eine solche Konstellation zur Destabilisierung von Gezeitengletschern führen kann. View Pine Island Glacier in a larger map. The Landsat satellite acquired the image on January 13, 2001. "The Pine Island glacier recently spawned an iceberg over (115 square miles) that very quickly shattered into pieces," the European Space Agency (ESA) said in a statement.. In the older images, rises in the ice’s surface can be identified at precisely those points where the peaks of the ridge are directly under the ice shelf. Click on the grey box links to switch between ice velocity products from the 270 different Sentinel-1 image pairs for Pine Island Glacier from the first image pair starting on 15.11.2014 to the final pair on 22.06.2020. Annals of Glaciology, Vol. The Pine Island Glacier’s more than 400-metre thick ice shelf must have been grounded on the ridge for several decades, as the satellite images of the glacier gathered by the researchers – dating back to 2002 – confirm. NASA Earth Observatory animation by Lauren Dauphin, using MODIS data from NASA EOSDIS/LANCE and GIBS/Worldview. Find local businesses, view maps and get driving directions in Google Maps. … . Normalerweise sind in diesem Gebiet westliche Winde vorherrschend. Find local businesses, view maps and get driving directions in Google Maps. [7], 2014 befand sich die Grounding Line an einer Stelle, an der der Meeresboden zur Küste hin nicht ansteigt, sondern zunächst wieder abfällt. The Pine Island Glacier is located around 1,600 miles from the tip of South America. The West Antarctic ice sheet: behavior and environment. Learn how to create your own. Dabei ist zu beachten, dass der im Rückzugsgebiet zunehmend steiler abfallende Meeresboden einem Rückzug der Grounding Line eigentlich entgegenwirkt haben sollte. One of the best‐mapped grounding lines is that of Pine Island Glacier (PIG), where the relationship between grounding line retreat and flow speed is well established. Find more information on www.geo-matching.com! (Courtesy of NASA) This month, an iceberg nearly the size of Atlanta broke off in Antarctica. They are also neighboring outlets, separated by the topographically unconfined eastern shear margin of Thwaites Glacier and the southwest tributary of Pine Island Glacier. The Pine Island Glacier’s more than 400-metre thick ice shelf must have been grounded on the ridge for several decades, as the satellite images of the glacier gathered by the researchers – dating back to 2002 – confirm. Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung Stabsstelle Kommunikation und Medien Am Handelshafen 12 27570 Bremerhaven Some of the evidence for this idea comes from satellite images like this one. Global Maps; Articles; Blogs; EO Explorer; Pine Island Glacier in Retreat. Pine Island Glacier in Antarctica spawns new iceberg on February 11, 2020. NASA-Forschungsflug über den Pine-Island-Gletscher im November 2011. At Hydro International, we often receive permission requests to use our articles for republishing purposes. A second, applied objective is to map elevation changes in Pine Island Glacier, a glacier that plays a key role in the question of stability of the West Antarctic Ice Sheet and has been changing rapidly in recent years. Our progress in getting to the Pine Island Glacier (PIG) drill site has been much better than last season. [4] Man geht davon aus, dass die Schmelzvorgänge im Meer und das Ausdünnen des Eisschelfs dazu führen, dass das Gletscherende dem Eisstrom weniger Widerstand entgegensetzt und somit ebenfalls für das Ausdünnen des kontinentalen Teils des Gletschers verantwortlich ist. Der starke Rückgang im Jahr 2012 war vermutlich auf die deutliche Abkühlung der Amundsen-See zurückzuführen. By October, the new iceberg has completely broken away. The January 2011 Landsat satellite imagery (not shown) showed a series of splits along the western edge of the glacier. news, Proven Source for Hydrographic Professionals, Sonardyne’s Solstice MCM Sonar Now MINTACS-compatible for Royal Australian Navy, New Charity to Support Global Maritime Safety and Education, Sea-level Monitoring Satellite First Results Surpass Expectations, Ocean Infinity Selects Sonardyne for Pioneering Armada Fleet, New Partnership Between Schmidt Ocean Institute and Intergovernmental Oceanographic Commission of UNESCO, www.hydro-international.com/content/rss/news, www.hydro-international.com/content/rss/articles, Researchers Map Seafloor Near Pine Island Glacier. Global Maps; Articles; Blogs; EO Explorer; Pine Island Glacier in Retreat. [3], Derzeit (2014) ist der Pine-Island-Gletscher für 20 % des Masseverlusts des Westantarktischen Eisschilds verantwortlich. Scale: lines x samples = 86km x 90km. List of ERS-1/ERS-2 date and orbits used for Pine Island Glacier. Pine Island Glacier drains much of the marine-based West Antarctic Ice Sheet, and it has a configuration susceptible to rapid disintegration and recession. Image. Presence of one currently erupting subglacial volcano beneath the Pine Island Glacier . Location map of Pine Island and Thwaites glaciers, in West Antarctica. With a flow speed of four kilometres per year, Western Antarctica’s Pine Island Glacier is one of the fastest-flowing ice streams in the Southern Hemisphere. Pine Island Glacier (PIG) is a large ice stream flowing west-northwest along the south side of the Hudson Mountains into Pine Island Bay, Amundsen Sea, Antarctica. The Pine Island Glacier in Western Antarctica is not only one of the fastest-flowing ice streams in the Southern Hemisphere; over the past eleven years, four major icebergs have calved from its floating tongue. Together with its neighbouring glaciers, every year the up to 50-kilometre-wide ice stream transports more than 300 gigatonnes of ice from the hinterland to the Amundsen Sea, and is responsible for between five and ten percent of the global sea-level rise. Juli 2013 zur Bildung eines Eisbergs mit einer Fläche von rund 720 km², der in die Amundsen-See trieb. Create brand awareness by advertising on our esteemed and industry-respected Hydro International platform. [9] Während der Großteil des beobachteten Abschmelzens nicht durch diesen Vulkanismus verursacht wird, sondern ein Effekt der globalen Erwärmung ist, so sei der Vulkanismus dennoch als zusätzlicher Faktor in künftigen Szenarien zu berücksichtigen: Magmaflüsse könnten sich innerhalb der vulkanisch aktiven Region ändern; oder die geringer werdende Last des abschmelzenden Eisschildes könnte die vulkanische Aktivität verstärken. That’s slightly larger than the iceberg that previously separated from the glacier in September 2017. Während im Jahr 2010 der Gletscher ungefähr 69 Kubikkilometer Eis als Schmelzwasser ins Meer transportierte, gab er 2012 mit etwa 35 Kubikkilometern nur etwa die Hälfte an Schmelzwasser ab. Just ask! The bathymetric maps of the seafloor in Pine Island Bay and the results of the image analyses can now be fed into computer models of the West Antarctic Ice Sheet, helping produce more accurate simulations. “The roughly 50-kilometre-long edge of the Pine Island Glacier’s ice shelf currently runs between an island to the north and another glacier to the south, which once again give the ice a bit of support,” says Jan Erik Arndt. Pine Island Glacier Data Set Map Midpoint location for each velocity vector in the data set, plotted on December 18, 1988 Landsat image. The Pine Island Glacier is the largest discharger of ice in Antarctica and the continent's fastest moving glacier. Pine Island Glacier map - mobile. Pine Island Glacier is one of the fastest-retreating glaciers in Antarctica. Location of study area. The researchers surmise that, just as in 2007, the ice shelf’s repeated contact with the ridge is what ultimately led to the calving event. As such, our Polarstern expedition in February 2017 was an unprecedented opportunity to map 370 square kilometres of an area that had previously largely been covered by the Pine Island Glacier’s ice shelf,” explains first author Dr Jan Erik Arndt from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) in Bremerhaven. Click on the grey box links to switch between ice velocity products from the 257 different Sentinel-1 image pairs for Pine Island Glacier from the first image pair starting on 15.11.2014 to the final pair on 05.04.2020. Don't miss the latest developments: join Hydro International! View the forecasted snow maps for the region around Pine Island Glacier. The Pine Island Glacier (a.k.a. The glacier is one of the main pathways for ice entering the Amundsen Sea from the West Antarctic Ice Sheet, and is one of the fastest-retreating glaciers in Antarctica. Satellite Image ID # Path/Row Date Acquired; Landsat 5: 5001113008635510: 01/113: 21 December 1986: Landsat 4 : 4001113008835310: 01/113: 18 … Banking over the edge of Pine Island Glacier ice shelf (6305643431).jpg 5,184 × 3,456; 2.59 MB View Pine Island Glacier in a larger map. A review of Pine Island Glacier basin,West Antarctica: hypotheses of instability vs. observations of change. In the older images, rises in the ice’s surface can be identified at precisely those points where the peaks of the ridge are directly under the ice shelf. PIG) The area of the iceberg poised to calve off the Pine Island Glacier is about 115 square miles, or 300 square kilometers. The Pine Island Glacier (maximum velocity measured 2.8 km/yr) and Thwaites Glacier (3.4 km/yr) are faster than most Antarctic ice streams, which generally have velocities less than 1.5 km/yr [Ref. Researchers on board the German research icebreaker 'Polarstern' successfully mapped an area of seafloor previously covered by shelf ice. Banking over the edge of Pine Island Glacier ice shelf (6305643431).jpg 5,184 × 3,456; 2.59 MB Stay tuned for the latest approaches to hydrographic data acquisition and processing, with a special focus on automatization and digitalization. 55 kilometres long, has been losing roughly 5.3 metres of thickness per year for the past quarter-century. The peninsula, which juts out to the north-east of the Pine Island Glacier, is among the fastest-warming regions on the planet. Pine Island Glacier’s Newest Iceberg. By that time, the ice shelf must have melted so extensively from below that it was either too light to produce any impression on the surface of the ice, or the ice sheet must have already lost contact with the mountains beneath it,” says co-author Dr Karsten Gohl from the AWI. Much to their surprise, in the process they determined that submarine highs not only stabilise ice shelves like giant brakes; in some cases, these mountains can also set off calving events – for instance, when the calving front advances, causing it to crash into a mountain with full force. With nothing left to stop them, the ice masses rapidly flow out to sea – at least that’s the theory. The Cryosphere 2018. It is a great way to boost corporate knowledge and to stay current on the latest news and developments in the hydrographic industry. Der vergletscherte Einzugsbereich hat eine Fläche von 162.300 km², die Eismassen des Gletschersystems machen rund 10 % des Westantarktischen Eisschilds aus. Model Pine Island Glacier Follow an example of how to create a mesh and set up the floating ice shelf of a real-world glacier Use observational data to parameterize the model Learn how to use inversions to infer basal friction and plot the results Introduction. Satellite altimetry and interferometry show that the grounded PIG thinned by up to 1.6 meters per year between 1992 and 1999, affecting 150 kilometers of the inland glacier. Latest ITS Die Abbruchskante verschiebt sich seit langem immer mehr in Richtung Land. Then in 2015, a calving event shifted the edge of the ice shelf 20 kilometres nearer the coast and reduced the floating ice tongue’s total area to roughly 470 square kilometres. Here we use speckle tracking to derive a subannual resolution record of the grounding zone position from 2009 to 2015, following the glacier's recent speedup. Another large iceberg recently broke off Pine Island Glacier, Antarctica. With the aid of multibeam echosounders, Arndt and his colleagues were able to precisely map the seafloor. Pine Island Glacier (PIG) is a large ice stream, and the fastest melting glacier in Antarctica, responsible for about 25% of Antarctica's ice loss. Do you know that most intranet environments support the Hydro International RSS-feeds? Der vergletscherte Einzugsbereich hat eine Fläche von 162.300 km², die Eismassen des Gletschersystems machen rund 10 % des Westantarktischen Eisschilds aus. According to the U.S. National Ice Center, this iceberg, named B-46, has an area of 87 square miles. To view image data select Velocity Map or Data Set Map, or use the links on the overview image. The catchments of Pine Island Glacier and Thwaites Glacier in the Amundsen Sea Embayment are two of the largest, most rapidly changing, and potentially unstable sectors of the West Antarctic Ice Sheet. Die Eisdicke des Gletschers, die auf etwa zwei Kilometer geschätzt wird, nimmt jährlich um ungefähr einen Meter ab. Weather maps produced by aq.freemeteo.com. Pine Island Glacier glaciological and oceanographic setting. Questions about using the RSS feed? Pine Island Glacier is also buttressed by a large, floating ice shelf, which is itself thinning and which calved a huge iceberg in late 2018.That iceberg was labeled B46 by scientists. Most people will never see Pine Island Glacier in person. In Alley, R. B. and Bindschadler, R. A. eds. The Pine Island Glacier is buttressed only by its own floating terminus, wedged between ice walls; the Thwaites Glacier is not buttressed by an ice shelf at all. Der Pine-Island-Gletscher (englisch Pine Island Glacier, abgekürzt PIG) ist ein bedeutender Eisstrom im Ellsworthland in Westantarktika. When one of the rifts finally became too large, the entire face of the ice shelf broke off. Scientists think that the glacier is shrinking because the ocean water that flows under the glacier is warming, increasing melt at the base. (A) Map of the Amundsen Sea Embayment, showing location of the study area. Strong, positive awareness acts like a magnet that puts customers on a fast track to purchase. Image. Latitude: -75° 09' 60.00" S Longitude: … Images and Data for Pine Island Glacier measured between 05.10.2015 and 11.04.2020. As the satellite images show, back then the edge of the Pine Island Glacier’s ice shelf collided with one of the newly discovered mountains, hitting it so hard that rifts formed in the surface of the ice. Mit diesem prognostizierten Masseverlust verursacht allein dieser Gletscher einen Meeresspiegelanstieg von 3,5 bis 10 mm innerhalb der nächsten 20 Jahre. As scientists map the contours of the seafloor in the Amundsen Sea region, they are forming a clearer picture of what the glaciers are doing. We flew into McMurdo Station on 17 November, and were able to get through all the check-ins and field training in a couple of days. [6] Dies führte am 8. Retreat at Pine Island Glacier. Retreat of Pine Island Glacier since 1947. (b) Pine Island Glacier ice shelf draft calculated from a surface digital elevation model derived from Worldview satellite stereoscopic optical imagery [Moratto et al., 2010; Shean et al., 2016] assuming hydrostatic equilibrium. O’Hare, Dieter Mach, John W. Holt, Donald D. Blankenship, David L. Morse, Duncan A. Posted February 13, 2020 15:06:44 Top Stories. Iceberg B-49 calved from the Antarctic glacier in February 2020. The figure here shows how this might happen as warming water melt the ice from below. Brand awareness can affect every stage of the purchase funnel. Tonnen Eis. [5], Im Oktober 2011 zog der Gletscher die Aufmerksamkeit auf sich, als sich 20 km hinter der Kalbungsfront ein etwa 30 km langer Riss im Schelfeis gebildet hatte. The tongue of Pine Island is shown moving inland between September 2006 and March 2007. Pine Island Glacier Data Set Map Midpoint location for each velocity vector in the data set, plotted on December 18, 1988 Landsat image. Pine Island and Thwaites glaciers. Simply search for Hydro International and fill in the article you are looking for. Observations from geophysical surveys and long-term oceanographic instruments deployed down bore holes into the ocean cavity reveal a buoyancy-driven boundary layer within a basal channel that melts … Why is Pine Island Glacier important? Iceberg B-49 calved from the Antarctic glacier in February 2020. (Courtesy of NASA) This month, an iceberg nearly the size of Atlanta broke off in Antarctica. Die sogenannte Grounding Line, also die Linie, ab der das Eis beginnt, auf dem Meer zu schwimmen, hat sich in diesem Zeitraum um etwa 20 Kilometer in Richtung der Küste verlagert. This map was created by a user. Located near the base of the Antarctic Peninsula—the “thumb” of the continent—the glacier lies more than 2,600 kilometers (1,600 miles) from the tip of South America. Even so, when a large crack formed across the glacier in mid 2000, it was surprising how fast the crack expanded, 15 meters per day, and how soon the resulting iceberg broke off, mid-November, 2001. Diese Seite wurde zuletzt am 1. We map the detailed chan-nel network and conduct a quantitative morphometric com-parison between the channels in Pine Island Bay and the ter-restrial channels comprising the Labyrinth. “The direction and speed of a given glacier’s flow chiefly depend on the topography of the ground below it. In February 2017, researchers on board the German research icebreaker 'Polarstern' successfully mapped an area of seafloor previously covered by shelf ice. PINE ISLAND BAY HUDSON MOUNTAINS Pine Island Glacier PS75/214-1 A B 110°W 105°W 100°W 95°W 73°S 75°S 0 100 200 km Pine Island Glacier Pine Island Bay Amundsen Sea Embayment B Pine Island Glacier ice shelf Fig. 60, p. 123. Pine Island Glacier (PIG) is a large ice stream flowing west-northwest along the south side of the Hudson Mountains into Pine Island Bay, Amundsen Sea, Antarctica. Even so, when a large crack formed across the glacier in mid 2000, it was surprising how fast the crack expanded, 15 meters per day, and how soon the resulting iceberg broke off, mid-November, 2001. August 2020 um 09:48 Uhr bearbeitet. The Pine Island Glacier is the largest discharger of ice in Antarctica and the continent's fastest moving glacier. Diese wurde durch die vorherrschenden östliche Winde verursacht, die durch einen starken La-Niña-Effekt bedingt waren. The peninsula, which juts out to the north-east of the Pine Island Glacier, is among the fastest-warming regions on the planet. Pine Island Glacier’s Newest Iceberg. When an ice shelf loses contact with such obstacles (known as “pinning points”), the ice stream reacts as if someone had suddenly released a giant brake. Der beschleunigte Verlust an Mächtigkeit, der seit den 1980er Jahren beobachtet wird, wird auf subglaziales Schmelzen am Grund des Eisschelfs zurückgeführt, welches sich durch die kürzliche Intensivierung der Zirkulation des Zirkumpolaren Tiefenwassers verstärkt hat. Raw Images. RSS-feed with news from Hydro International:www.hydro-international.com/content/rss/news, Latest articles published on Hydro International:www.hydro-international.com/content/rss/articles. Der Pine-Island-Gletscher (englisch Pine Island Glacier, abgekürzt PIG) ist ein bedeutender Eisstrom im Ellsworthland in Westantarktika. Share on Facebook; Share on Twitter; Share on Reddit; Share on Google+; Share on Pinterest; Embed; earthobservatory.nasa.gov. Scientists have already identified the cause of this rapid loss of ice: since the 1940s, warm water masses, which branch off from the Antarctic Circumpolar Current, have found their way beneath the floating part of the glacier, melting what is referred to as its ice shelf from below. The fieldwork is part of a scientific… Der Pine-Island-Gletscher transportiert mehr Eis ins Meer als jeder andere Gletscher weltweit. The Pine Island Glacier (PIG) transports 69 cubic kilometers of ice each year from ∼10% of the West Antarctic Ice Sheet (WAIS). Using the time series of satellite images for the Pine Island Glacier, the researchers were now able to test this thesis step by step. Young: L. Favier, G. Durand, S. L. Cornford, G. H. Gudmundsson, O. Gagliardini, F. Gillet-Chaulet, T. Zwinger, A. J. Payne, A. M. Le Brocq: J. W. Park, N. Gourmelen, A. Shepherd, S. W. Kim, D. G. Vaughan, D. J. Wingham: Pierre Dutrieux, Jan De Rydt, Adrian Jenkins, Paul R. Holland, Ho Kyung Ha, Sang Hoon Lee, Eric J. Steig, Qinghua Ding, E. Povl Abrahamsen, Michael Schröder: Donald D. Blankenship, Robin E. Bell, Steven M. Hodge, John M. Brozena, John C. Behrendt, Carol A. Finn: Vorlage:Infobox Gletscher/Wartung/Bildbeschreibung fehlt, Riesiger Eisberg löst sich vom Pine-Island-Gletscher in der Antarktis, https://de.wikipedia.org/w/index.php?title=Pine-Island-Gletscher&oldid=202402986, „Creative Commons Attribution/Share Alike“. Abgekürzt PIG ) ist ein bedeutender Eisstrom im Ellsworthland in Westantarktika Medien Am Handelshafen 12 27570 Pine. Stay current on the overview image recht rasch weitere 40 Kilometer zurückziehen wird rund 720 km², die Eismassen Gletschersystems. Below it were derived from the right of the underlying seafloor region around Pine Island Glacier, its. And industry-respected Hydro International underlying seafloor this idea comes from satellite images like this one C.K! 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