Vulnerability of Antarctica’s ice shelves to meltwater-driven fracture

This data set contains the results presented in Lai et al. (2020), including; the 125m-resolution fracture map, the spatial distribution of fracture depths and the required initial flaw size for hydrofracture, which is calculated using linear elastic fracture mechanics (LEFM) according to the ice-shelf stress fields and thickness. The dimensionless stress (Rxx_bar, defined in Lai et al. (2020)) governs how fractures behave. Using a dimensionless stress criteria we have determined which ice-shelf areas are vulnerable to hydrofracture if inundated with melt water (Rxx_bar >Rxx*_bar).

本数据集包含Lai等人（2020）发表的研究结果，具体包括：125米分辨率的裂缝分布图、裂缝深度的空间分布，以及水力压裂所需的初始缺陷尺寸。其中，初始缺陷尺寸基于冰架应力场与冰架厚度，通过线性弹性断裂力学（linear elastic fracture mechanics，LEFM）计算得到。无量纲应力（Rxx_bar，定义详见Lai等人2020年的研究）决定了裂缝的演化行为。基于该无量纲应力判据，我们已判定：若冰架区域被融水淹没，且满足Rxx_bar > Rxx*_bar时，该区域易发生水力压裂破坏。