Using Sentinel-1A/1B radar data to monitor the retreat of Antarctic grounding line

doi:10.13474/j.cnki.11-2246.2019.0215

Abstract

Abstract: The accurate determination of the position of Antarctic grounding line is of great importance to the calculation of Antarctic material balance and the glacial dynamics. The basic principle of the DDInSAR extraction ground line is described, and the ground line of ice shelves along the Queen Maud Land of the east Antarctica and Dotson on the west of the Amundsen Bay of the west Antarctic are extracted using the Sentinel-1A/1B radar data. The extraction results are compared with the existing ground line product MEa-SUREs. The results show that using the Sentinel-1A/1B radar data based on DDInSAR method can extract and update the Antarctic ground line, and continuously monitor the grounding line retreat. Through monitoring, it can be found that in the area of Dotson Ice Shelf, the grounding line has undergone a large retreat, approximately 2~5 km back over the 22 years from 1996 to 2018, with a maximum retreat of 7.4 km.

Key words: ground line of Antarctic, DDInSAR, ground line retreat, Sentinel-1, fluctuation of sea level

CLC Number:

P237

XU Zhida, WANG Zhiyong, TAN Jianwei. Using Sentinel-1A/1B radar data to monitor the retreat of Antarctic grounding line[J]. 测绘通报, 2019, 0(7): 39-43,49.

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