Evidence of Cascading Subglacial Water Flow at Jutulstraumen Glacier (Antarctica) Derived From Sentinel?1 and ICESat?2 Measurements

Migration of subglacial water underneath thick Antarctic ice is difficult to observe directly but known influence flow dynamics. Here, we analyze a 6-year time series displacement maps from differential Sentinel-1 SAR interferometry (DInSAR) in the upstream region Jutulstraumen Glacier. Our results reveal short-term (between 12 days and 1 year) interconnected subsidence- uplift events surface, which interpret as pressure response drainage filling lakes. This indicates an episodic cascade-like transport with longer quiescent phases dynamically stable glacial setting. Abrupt appear DInSAR are confirmed by ICESat-2 altimetry. The can be traced for 1-year period along 175 km path. We able migration unprecedented spatial temporal resolution, providing new observational baseline further develop hydrological models.