Spatio-temporal Analysis of Ice flow Variations on the Getz Ice Shelf, Antarctica

Authors: Yan Huang, Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University School of Geographic Sciences, East China Normal University, Bailang Yu, Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University School of Geographic Sciences, East China Normal University, Jianping Wu, Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University School of Geographic Sciences, East China Normal University, SHIFENG XU*, Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University School of Geographic Sciences, East China Normal University, Hongxing Liu, Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University; Department of Geography, The University of Alabama, Shujie Wang, Lamont-Doherty Earth Observatory, Columbia University
Topics: Cryosphere
Keywords: glacier-ice shelf, ice surface velocity
Session Type: Paper
Day: 4/6/2019
Start / End Time: 8:00 AM / 9:40 AM
Room: Roosevelt 6, Marriott, Exhibition Level
Presentation File: No File Uploaded


The Antarctic ice shelves play a significant role in buttressing and stabilizing the ice discharge from the grounded ice sheet into the ocean. The Getz Ice Shelf stretches along nearly half of the West Antarctic coastline in the Amundsen Sea, providing the largest source of meltwater to the Southern Ocean. Recent observations show that the Getz Ice Shelf is subject to the more variable ocean forcing than most of other Pacific ice shelf sectors. The Getz Ice Shelf has been experiencing the highest rate of basal melting among the Antarctic ice shelves, particularly for Getz F Ice Shelf. Such susceptibility highlights the importance of investigating the flow dynamics of the Getz Ice Shelf in response to atmospheric and oceanic changes in the climate warming context. In this study, we derived the time series surface flow velocities for the Getz F Ice Shelf in the West Antarctica during 2000-2018 by applying a semi-automated image matching method to multi-sensor satellite images. The utilized satellite images include Landsat 5 TM, Landsat 7 ETM+ and Landsat 8 OLI images. The spatio-temporal variability in ice flow velocity was analyzed in association with the ice shelf margin retreats and surface melting. Despite the significant basal melting and the grounded ice thinning, our preliminary results shows that the Getz F Ice Shelf only experienced a modest flow acceleration. in the past two decades.

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