(Table 1) Ice thickness of new subglacial lakes identified in the ICECAP RES data and of previously known subglacial lakes

Subglacial hydrology in East Antarctica is poorly understood, yet may be critical to the manner in which ice flows. Data from a new regional airborne geophysical survey (ICECAP) have transformed our understanding of the topography and glaciology associated with the 287,000 km**2 Aurora Subglacial Basin in East Antarctica. Using these data, in conjunction with numerical ice sheet modeling, we present a suite of analyses that demonstrate the potential of the 1000 km-long basin as a route for subglacial water drainage from the ice sheet interior to the ice sheet margin. We present results from our analysis of basal topography, bed roughness and radar power reflectance and from our modeling of ice sheet flow and basal ice temperatures. Although no clear-cut subglacial lakes are found within the Aurora Basin itself, dozens of lake-like reflectors are observed that, in conjunction with other results reported here, support the hypothesis that the basin acts as a pathway allowing discharge from subglacial lakes near the Dome C ice divide to reach the coast via the Totten Glacier.南极东部冰下水文（subglacial hydrology）的现有认知仍较为匮乏，但其或许对冰流运动模式起着关键调控作用。一项全新的区域航空地球物理勘测（airborne geophysical survey，ICECAP）所获取的数据，重塑了我们对南极东部28.7万平方千米的极光冰下盆地（Aurora Subglacial Basin）相关地形与冰川学特征的认知。本研究结合该勘测数据与冰盖数值模拟（numerical ice sheet modeling）模型，开展了一系列分析，证实了这条长达1000千米的冰下盆地具备作为冰盖内部冰下水体向冰盖边缘排泄通道的潜力。我们展示了针对基底地形、床面粗糙度与雷达功率反射率的分析结果，以及冰盖流动与基底冰温的模拟结果。尽管极光冰下盆地内部并未发现明确的冰下湖，但研究观测到了数十处类湖反射特征。结合本次研究报告的其他结果，该现象支持以下假说：该盆地可作为通道，使穹顶C（Dome C）冰盖分水岭附近的冰下湖水体通过托滕冰川（Totten Glacier）最终抵达海岸。