The sediments of shallow marine waters and lakes around Antarctica provide valuable records of sea-level changes. Understanding the timing and amplitude of Antarctic Ice Sheet changes during the last deglaciation is essential to assess the effect of glacial isostatic adjustments on the present ice-sheet mass balance. However, the difficulty in accessing Antarctica makes it challenging to obtain field-based evidence of ice-sheet and sea-level change during the last deglaciation. We used a portable sonar system to measure bathymetry and water column profiles (sea temperature, salinity, dissolved oxygen, and turbidity) in Lake Nurume and shallow marine waters of Langhovde, East Antarctica, to collect baseline data for sea-level reconstruction from the Last Glacial Maximum (~20 ka). The bathymetry data reveals the surveyed shallow marine waters of Langhovde have basins of 100 m water depth with approximately −67 and −92 m sills, in which sediments provide a potentially useful sea-level archive for the last deglaciation. The water column profile in Lake Nurume reveals a chemocline at ~11 m water depth and anoxic condition below that depth. These baseline data will be useful to reconstruct sea-level and ice-sheet changes in East Antarctica.

南极洲周围浅海水域和湖泊的沉积物提供了宝贵的海平面变化记录。了解最后一次冰消期间南极冰盖变化的时间和幅度对于评估冰川均衡调整对当前冰盖质量平衡的影响至关重要。然而，进入南极洲的难度使得在上次冰消期期间获得冰盖和海平面变化的实地证据具有挑战性。我们使用便携式声纳系统测量 Nurume 湖和南极洲东部 Langhovde 浅海水域的水深测量和水柱剖面（海温、盐度、溶解氧和浊度），以收集用于海平面重建的基线数据。冰川最大值（~20 ka）。测深数据显示，所调查的 Langhovde 浅海水域具有 100 m 水深的盆地，其中有大约 -67 和 -92 m 的基石，其中沉积物为最后一次冰消作用提供了潜在有用的海平面档案。Nurume 湖中的水柱剖面显示约 11 m 水深处的趋化层和低于该深度的缺氧条件。这些基线数据将有助于重建东南极洲的海平面和冰盖变化。