Propagation of cracks through an ice shelf as precondition for calving: numerical experiments with an idealised glacial system
Propagation of cracks through an ice shelf as precondition for calving: numerical experiments with an idealised glacial system
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裂缝通过冰架的传播作为崩解的先决条件：理想化冰川系统的数值实验
DOI：
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发表时间：
2003
期刊：
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通讯作者：
H. Sandhäger
中科院分区：
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作者：
A. Hammann;H. Sandhäger
我们研究了可能导致大型冰山从南极浮冰架上崩解的机制。为此，利用冰架动力学数值模型进行了一系列实验。结果表明，可以区分裂纹扩展的有利区域和不利区域。我们还表明，在主应力轨迹的基础上描绘裂纹扩展路径是可能的。由于目前的数值模型无法对含裂缝的冰架进行随时间变化的模拟，本研究的范围受到限制。
We investigated mechanisms which might lead to the calving of large icebergs from floating ice shelves in Antarctica. To this end, a number of experiments were carried out with a numerical model of ice shelf dynamics. The results show that it is possible to distinguish between favourable and unfavourable regions for crack growth. We also show that it is possible to delineate crack propagation paths on the basis of principal stress trajectories. The scope of this study is limited by the inability to perform time-dependent simulations of ice shelves containing cracks with the present numerical model.