Taking the temperature of Antarctica with joint inversion of geophysical information - Antarctic Heat 2

近年来，人们采用了不同的方法来量化南极洲的热结构，尤其是地热热流。在项目的第一阶段，我们已经证明了这些模型通常是不相容的，因为它们是基于相互矛盾的假设，与地球物理产品之间的相互依赖性不一致。尽管如此，来自卫星观测、航空地球物理数据、地质和地震学模型的可用地球物理信息可以用于机器学习等自动方法，以提供对地热热流及其不确定性的新评估。因此，关键是对应用数据集的仔细评估。除了数据质量之外，区域数据集缺乏冰盖建模所需的细节，但局部数据集可能缺乏进行系统分析所需的空间覆盖。通过将新的地球物理反演方法与主要在南极洲海岸可用的岩石性质相结合，我们将预测大陆的热物理参数。这些将与基于冰温度剖面的热参数相结合，为固体地球和冰冻圈之间的过渡提供一个完全耦合的温度模型。我们将进一步探讨这些产品对冰盖动力学的敏感性。

Different methods have been applied in recent years to quantify the thermal structure and most specific the geothermal heat flow over Antarctica. In the first phase of the project, we have demonstrated that such models are often incompatible as they are based on contradicting assumptions not agreeing with the interdependencies between the geophysical products. Still, the available pieces of geophysical information from satellite observations, airborne geophysical data, geological and seismological models can be used in automatic methods like machine learning to provide a new assessment of the geothermal heat flow and its uncertainty. Critical is hereby a careful evaluation of the applied data sets. In addition to data quality, regional data sets lack the details required for ice-sheet modelling, but local data sets may lack the spatial coverage for a systematic analysis. By coupling novel geophysical inverse methods with rock properties available mainly at the coasts of Antarctica, we will predict thermal and geophysical parameters into the continent. These will be coupled with thermal parameters based on ice temperature profiles to provide a fully coupled temperature model for the transition between the Solid Earth and Cryosphere. We will furthermore explore the sensitivity of these products for ice-sheet dynamics.