datasheet1_The Antarctic Crust and Upper Mantle: A Flexible 3D Model and Software Framework for Interdisciplinary Research.pdf

Interdisciplinary research concerning solid Earth–cryosphere interaction and feedbacks requires a working model of the Antarctic crust and upper mantle. Active areas of interest include the effect of the heterogeneous Earth structure on glacial isostatic adjustment, the distribution of geothermal heat, and the history of erosion and deposition. In response to this research need, we construct an adaptable and updatable 3D grid model in a software framework to contain and process solid Earth data. The computational framework, based on an open source software package agrid, allows different data sources to be combined and jointly analyzed. The grid model is populated with crustal properties from geological observations and geochronology results, where such data exist, and published segmentation from geophysical data in the interior where direct observations are absent. The grid also contains 3D geophysical data such as wave speed and derived temperature from seismic tomographic models, and 2D datasets such as gravity anomalies, surface elevation, subglacial temperature, and ice sheet boundaries. We demonstrate the usage of the framework by computing new estimates of subglacial steady-state heat flow in a continental scale model for east Antarctica and a regional scale model for the Wilkes Basin in Victoria Land. We hope that the 3D model and framework will be used widely across the solid Earth and cryosphere research communities.

针对固体地球-冰冻圈相互作用及反馈机制的跨学科研究，亟需一套适用于南极地壳与上地幔的工作模型。当前受关注的研究热点包括：非均匀地球结构对冰川均衡调整的影响、地热分布，以及侵蚀与沉积演化历史。针对这一研究需求，我们基于软件框架构建了一套可适配、可更新的三维网格模型，用于存储与处理固体地球相关数据。该计算框架基于开源软件包agrid开发，支持整合多源数据并开展联合分析。在有相关数据的区域，网格模型纳入了来自地质观测与地质年代学结果的地壳属性参数；在缺乏直接观测的南极内陆区域，则采用已发表的地球物理数据分割结果。该网格模型还包含三维地球物理数据——例如来自地震层析成像模型的波速与反演温度，以及二维数据集，如重力异常、地表高程、冰下温度与冰盖边界。我们通过构建南极东部大陆尺度模型与维多利亚地威尔克斯盆地区域尺度模型，计算得到了冰下稳态热流的新估算结果，以此展示了本框架的使用方法。我们期望这套三维模型与计算框架能够在固体地球与冰冻圈研究领域得到广泛应用。