Determination of grounding line on the Amery Ice Shelf using Sentinel-1 radar interferometry data

• Main Authors: Haobo, Lei, Chunxia, Zhou, Yiming, Chen
• Format: Article in Journal/Newspaper
• Language: English
• Published: Polar Research Institute of China - PRIC 2017
• Subjects: Cryosphere; Antarctic; Amery; Amery Ice Shelf; Advances in Polar Science; Antarc*; Antarctica; Ice Shelf; Polar Science
• Online Access: http://library.arcticportal.org/2639/; http://library.arcticportal.org/2639/1/A180205000006.pdf

Delineation of the grounding line (GL) is necessary for calculating the mass balance of Antarctica, but GL measurements for most of the continent remain at a relatively coarse level. We used Sentinel-1 constellation data to map the GL of the Amery Ice Shelf (AIS) using double-differential synthetic aperture radar interferometry. The ice thickness anomaly deduced from hydrostatic equilibrium and existing Antarctic GL products is compared with our result. With this new and very accurate GL, we detected new ice rises in the north of the AIS. Our new measurement shows no major change of the AIS GL, particularly in the southernmost part.