Dome A is the summit of the East Antarctic Ice Sheet, underlain by the rugged Gamburtsev Subglacial Mountains. The rugged basal topography produces a complex hydrological system featuring basal melt, water transport and storage, and freeze‐on. In a companion study, we used an inverse model to infer the spatial distributions of geothermal heat flow (GHF) and accumulation rate that best fit a variety of observational constraints. Here, we present and analyze the best‐fit state of the ice sheet in detail. Our modeled result agrees well with the observed water bodies and freeze‐on structures, while also predicting a significant amount of unobserved water and suggesting a change in stratigraphic interpretation that reduces the volume of the freeze‐on units. Our modeled stratigraphy agrees well with observations, and we predict that there will be two distinct patches of ice up to 1.5 Ma suitable for ice coring underneath the divide. Past divide migration could have interrupted stratigraphic continuity at the old ice patches, but various indirect lines of evidence suggest that the divide has been stable for about the last one and a half glacial cycles, which is an encouraging but not definitive sign for stability in the longer term. Finally, our GHF estimate is higher than previous estimates for this region, but consistent with possible heterogeneity in crustal heat production.

中文翻译：

---

来自南极东部Dome A冰穿透雷达观测的地表累积速率和地热流的联合反演。第二部分：冰盖状态和地球物理分析

圆顶A是东极南极冰原的顶峰，在崎G的甘布兹采夫冰川下山脉之下。崎的基础地形产生了复杂的水文系统，具有基础融化，输水和储水以及冻结的特点。在伴随研究中，我们使用了逆模型来推断最适合各种观测约束的地热热流（GHF）和累积速率的空间分布。在这里，我们详细介绍并分析冰盖的最佳状态。我们的模拟结果与观察到的水体和冻结结构非常吻合，同时还预测了大量未观测到的水，并暗示地层解释发生了变化，从而减少了冻结单元的体积。我们模拟的地层学与观测非常吻合，并且我们预测在分隔线的下方将有两个截然不同的高达1.5 Ma的冰块适合于取冰。过去的鸿沟迁移可能打断了旧冰块的地层连续性，但各种间接证据表明，鸿沟在大约最后一个半个冰川周期内一直是稳定的，这是一个令人鼓舞但不是确定性的迹象，表明冰原的稳定性。长期的。最后，我们的GHF估算值高于该地区以前的估算值，但与地壳热量产生中可能存在的非均质性相一致。但是各种间接证据表明，这种分裂在过去的一个半冰川周期中一直保持稳定，这从长远来看是一个令人鼓舞但不是确定性的信号。最后，我们的GHF估算值高于该地区以前的估算值，但与地壳热量产生中可能的非均质性相一致。但是各种间接证据表明，这种分裂在过去的一个半冰川周期中一直保持稳定，这从长远来看是一个令人鼓舞但不是确定性的信号。最后，我们的GHF估算值高于该地区以前的估算值，但与地壳热量产生中可能存在的非均质性相一致。