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- W3033631610 startingPage "1809" @default.
- W3033631610 abstract "Monitoring variability in outlet glaciers can improve the understanding of feedbacks associated with calving, ocean thermal forcing, and climate change. In this study, we present a remote-sensing investigation of Dalk Glacier in East Antarctica to analyze its dynamic changes. Terminus positions and surface ice velocities were estimated from Landsat and Sentinel-1 data, and the high-precision Worldview digital elevation model (DEM) was generated to determine the location of the potential ice rumple. We detected the cyclic behavior of glacier terminus changes and similar periodic increases in surface velocity since 2000. The terminus retreated in 2006, 2009, 2010, and 2016 and advanced in other years. The surface velocity of Dalk Glacier has a 5-year cycle with interannual speed-ups in 2007, 2012, and 2017. Our observations show the relationship between velocity changes and terminus variations, as well as the driving role of the ice rumple. Ice velocity often increases after calving events and continuous retreats. The loss of buttressing provided by an ice rumple may be a primary factor for increases in ice velocity. Given the restriction of the ice rumple, the surface velocity remains relatively stable when the glacier advances. The calving events may be linked to the unstable terminus caused by the ice rumple." @default.
- W3033631610 created "2020-06-12" @default.
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- W3033631610 date "2020-06-03" @default.
- W3033631610 modified "2023-10-10" @default.
- W3033631610 title "Dynamics of Dalk Glacier in East Antarctica Derived from Multisource Satellite Observations Since 2000" @default.
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- W3033631610 doi "https://doi.org/10.3390/rs12111809" @default.
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