Geometry and dynamics of subglacial lakes in East Antarctica

德累斯顿工业大学和PMGE之间拟议的双边合作项目旨在对南极洲东部的冰下湖泊进行复杂的跨学科调查。对冰下水腔和水排放的研究是目前南极洲国际研究的主要目标之一。许多与冰下水洞存在有关的现象仍然知之甚少。然而，基底水层及其与上覆冰的相互作用对南极冰盖的动力学、质量平衡和稳定性具有重要意义。根据双方合作伙伴在调查世界上已知最大的沃斯托克冰下湖时所收集的经验，将利用现场观测和卫星数据研究在米尔-沃斯托克- Progress地区发现的一些较小的冰下水洞。结合地球物理测量和大地测量，探测冰下水洞的接地线，确定地表高度及其变化、水平流速场和覆盖冰盖厚度。在此基础上，推导和解释了冰下水洞的形态特征、水收支、水交换过程、水与冰盖的相互作用、冰流动力学、质量平衡估算以及冰下湖泊的地貌环境。在这方面，只有结合双方的经验、互补的技术、方法和数据，才能达到预期的质量和结果的复杂性。

The proposed bilateral cooperation project between TU Dresden and PMGE aims at a complex, interdisciplinary investigation of subglacial lakes in East Antarctica. The study of subglacial water cavities and water discharges constitutes one of the major targets of current international research in Antarctica. Many phenomena related to the existence of subglacial water cavities are still poorly understood. Basal water layers and their interaction with the overlaying ice, however, have important implications for the dynamics, mass balance and stability of the Antarctic ice sheet. Based on the experience gathered by both partners jointly in the investigation of the world's largest known subglacial Lake Vostok, a number of smaller subglacial water cavities discovered in the sector Mirny - Vostok - Progress shall be studied using both in-situ observations and satellite data. Combining geophysical and geodetic measurements, the grounding line of subglacial water cavities will be detected and surface heights and their changes, the horizontal flow velocity field, and the thickness of the covering ice sheet will be determined. From that, the morphometry of the subglacial water cavities, their water budget, water exchange processes, the interactions between water and ice sheet, ice flow dynamics, mass balance estimates and the geomorphologic environment of the subglacial lakes are deduced and interpreted. At this, the anticipated quality and complexity of the results can be achieved only by combining the experience, the complementary techniques, methods and data of both partners.