Dabei ist zu beachten, dass der im Rückzugsgebiet zunehmend steiler abfallende Meeresboden einem Rückzug der Grounding Line eigentlich entgegenwirkt haben sollte. Iceberg B-49 calved from the Antarctic glacier in February 2020. By October, the new iceberg has completely broken away. 60, p. 123. 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. [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. They are also neighboring outlets, separated by the topographically unconfined eastern shear margin of Thwaites Glacier and the southwest tributary of Pine Island Glacier. Weather maps produced by aq.freemeteo.com. In addition to the two researchers from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research a member of the British Antarctic Survey and experts from the German Aerospace Center (DLR) took part in the new study. The Pine Island glacier has retreated roughly 50 kilometers in the past 70 years. But for most of the ice shelves in the Antarctic, we know very little about the features of the underlying seafloor. That being said, what remained unclear was why, despite this sustained melting, the Pine Island Glacier’s calving front had barely retreated since the beginning of observation in 1947. Normalerweise sind in diesem Gebiet westliche Winde vorherrschend. 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. In February 2017, researchers on board the German research icebreaker 'Polarstern' successfully mapped an area of seafloor previously covered by shelf ice. The role of Pine Island Glacier ice shelf basal channels in deep-water upwelling, polynyas and ocean circulation in Pine Island Bay, Antarctica. Scale: lines x samples = 86km x 90km. Pine Island Glacier Data Set Map Midpoint location for each velocity vector in the data set, plotted on December 18, 1988 Landsat image. As a result, the ice tongue, which is currently ca. 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. In den folgenden Jahren bleibt der Masseverlust laut diesen Simulationen auf hohem Niveau von 60 bis 120 Gigatonnen pro Jahr. 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. Velocity data were derived from the Landsat scenes listed below. Questions about using the RSS feed? In November 2015 an iceberg the size of Singapore broke off from the glacier, signaling its depreciating state. Pine Island Glacier in Antarctica spawns new iceberg on February 11, 2020. In Alley, R. B. and Bindschadler, R. A. eds. 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. Using the time series of satellite images for the Pine Island Glacier, the researchers were now able to test this thesis step by step. Image. The Pine Island Glacier is visible stretching from the right of the image to the centre. 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. David G. Vaughan, Hugh F. J. Corr, Fausto Ferraccioli, Nicholas Frearson, Aidan … . 18]). Diese Seite wurde zuletzt am 1. Maps for all. 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. (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. List of ERS-1/ERS-2 date and orbits used for Pine Island Glacier. [3], Derzeit (2014) ist der Pine-Island-Gletscher für 20 % des Masseverlusts des Westantarktischen Eisschilds verantwortlich. 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. Location of study area. 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. [2], Der Gletscher hat sich in den letzten 20 Jahren deutlich zurückgezogen. 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. “The direction and speed of a given glacier’s flow chiefly depend on the topography of the ground below it. 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. Do you know that most intranet environments support the Hydro International RSS-feeds? Follow Hydro International on Facebook, LinkedIn, Twitter or sign up for the newsletter! 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“. Die Vergangenheit hat gezeigt, dass eine solche Konstellation zur Destabilisierung von Gezeitengletschern führen kann. 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. Strong, positive awareness acts like a magnet that puts customers on a fast track to purchase. Pine Island Glacier (Landsat) Access Data. Maps for all. The same area in January 2012 (not shown) showed a major break, and the November 13, 2013 (above) image shows … Another large iceberg recently broke off Pine Island Glacier, Antarctica. (Antarctic Research Series 77.) Dieser Vulkan war bereits vor 2200 Jahren ausgebrochen. The peninsula, which juts out to the north-east of the Pine Island Glacier, is among the fastest-warming regions on the planet. [5], 2015 und 2017 brachen zwei weitere große Eisberge von Eisschelf ab. The peninsula, which juts out to the north-east of the Pine Island Glacier, is among the fastest-warming regions on the planet. 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. Most people will never see Pine Island Glacier in person. Die Pine Island Bay ist eine 48 km breite und etwa 64 km lange Bucht an der Walgreen-Küste des ostantarktischen Marie-Byrd-Lands.Der Pine-Island-Gletscher mündet in diese Bucht.. Luftaufnahmen der US-amerikanischen Operation Highjump (1946–1947) aus dem Jahr 1946 dienten 1955 dem US-amerikanischen Kartografen Gardner „Gard“ Dean Blodgett (* 1925) der Kartierung der Bucht. Die Abbruchskante verschiebt sich seit langem immer mehr in Richtung Land. An expedition to the ice shelf of the remote Pine Island Glacier, a major outlet of the West Antarctic Ice Sheet that has rapidly thinned and accelerated in recent decades, has been completed. Researchers Map Seafloor Near Pine Island Glacier The Pine Island Glacier in Western Antarctica is not only one of the fastest-flowing ice streams in the Southern Hemisphere; over the past 11 years, four major icebergs have calved from its floating tongue. Some of the evidence for this idea comes from satellite images like this one. In the austral summer of 2012-2013 scientists and support staff spent 6 weeks camped on Antarctica's Pine Island Glacier. Jan Erik Arndt, Robert D. Larter, Peter Friedl, Karsten Gohl, Kathrin Höppner, and The Science Team of Expedition PS104: Bathymetric Controls on Calving Processes at Pine-Island Glacier. The largest piece became caught on the submarine ridge for nearly a year, turning clockwise over and over again until the combination of ocean currents, wind and melting broke it loose. The tongue of Pine Island is shown moving inland between September 2006 and March 2007. Satellite Image ID # Path/Row Date Acquired; Landsat 5: 5001113008635510: 01/113: 21 December 1986: Landsat 4 : 4001113008835310: 01/113: 18 … Rückzug der Grounding Line eigentlich entgegenwirkt haben sollte x 90km Ellsworthland in Westantarktika aid. Island is shown moving inland between September 2006 and March 2007 Line entgegenwirkt! 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