Grounding Line Mapping with Differential Synthetic Aperture Radar Interferometry: A Case Study on the Coast of Dronning Maud Land, East Antarctica

The Antarctic Ice Sheet (AIS) is the prominent contributor to global sea level rise. As the transition area from grounded ice to floating ice, long-term continuous monitoring of the grounding line (GL) is vital for mass balance estimation and ice-sheet stability evaluation. Differential Synthetic Aperture Radar (SAR) Interferometry (DInSAR) has demonstrated considerable promise in high-accuracy delineation of GLs. The SAR data acquired by Sentinel-1 satellites in IW mode between January 2019 and May 2023 was used to map the GL of the study area situated on the western coast of Dronning Maud Land, East Antarctica. GLs were delineated for each year with the double-difference interferograms. The positions of GLs within the five years were analyzed and compared with the previously published GL products. It's revealed from the results that the GL of the study area has been stable throughout the study period.