In this paper, we examine potential impact of discharge in Subglacial Lake Engelhardt, West Antarctica, on the stability of the Ross Ice Shelf around the grounding line by combining satellite altimetry and remote sensing images. According to satellite altimetry data from the Ice, Cloud and Land Elevation Satellite (ICESat; 2003–06), Subglacial Lake Engelhardt (SLE) discharged ca. 1.91 ± 0.04 km³ of water into the downstream region. The ice-surface record derived from ICESat (2006–09) and CryoSat-2 (2011–17) data shows that the lake gained ca. 2.09 ± 0.05 km³ of water during the refilling event following the drainage event, taking three times as much time to reach the previous water level before the discharge; the calculation demonstrates that water input from an upstream lake is unable to sustain water increase in SLE, indicating that the subglacial, hydrologic system and groundwater flow could have contributed to water increase in SLE via hydrologic networks. Satellite images captured surface depressions and crevasses at the drainage outlet point of hydrologic networks around the grounding line; satellite altimetry data show that the ice surface there is still depressing even though the subglacial discharge has finished, potentially reflecting the long-term impact of subglacial discharge on the stability of the immediate Ross Ice Shelf around the grounding line.

在本文中，我们通过结合卫星测高仪和遥感图像，研究了南极西部恩格哈特冰川下冰湖对陆线周围罗斯冰架稳定性的潜在影响。根据来自冰，云和陆地高程卫星（ICESat; 2003-06）的卫星测高数据，冰川下的恩格哈特湖（SLE）排放了大约10万立方米。 下游区域有1.91±0.04 km ³的水。从ICESat（2006–09）和CryoSat-2（2011–17）数据得出的冰面记录表明，该湖获得了约3。2.09±0.05公里³ 在排水事件发生后的补给过程中，需要花费三倍的时间才能达到排放前的水位；计算结果表明，上游湖泊的水输入不能维持SLE中的水增加，这表明冰川以下，水文系统和地下水流量可能通过水文网络促进了SLE中的水增加。卫星图像捕获了接地线周围水文网络排水口的表面凹陷和裂缝。卫星测高仪的数据显示，即使冰下排放已经完成，那里的冰面仍在压抑，这可能反映了冰下排放对接地线附近直接罗斯冰架稳定性的长期影响。