Modeling the instantaneous response of glaciers after the collapse of the Larsen B Ice Shelf
Modeling the instantaneous response of glaciers after the collapse of the Larsen B Ice Shelf
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DOI：
10.1002/2015gl064355
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发表时间：
2015-07
影响因子：
5.2
通讯作者：
J. Rydt;G. Gudmundsson;H. Rott;J. Bamber
中科院分区：
文献类型：
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作者：
J. Rydt;G. Gudmundsson;H. Rott;J. Bamber
2002年南极半岛拉森B冰架解体之后，对其约20条支流冰川的定期监测显示，其响应在空间和时间上都是多样且复杂的。主要的出口冰川加速流动且变薄，较小的冰川几乎没有变化，而流入残余的斯卡湾冰架的冰川则延迟响应。在这项研究中，我们结合新的数据集和最先进的数值冰流模型，首次对冰架崩塌前后的冰川动力学进行了区域范围的数值分析。我们模拟了接地线处支撑力的丧失，发现冰川流动的模拟变化与观测结果在定性上吻合良好。通过这项研究，我们力求提高对数值模型及其捕捉浮冰架和接地冰之间复杂力学耦合能力的信心。
Following the disintegration of the Larsen B Ice Shelf, Antarctic Peninsula, in 2002, regular surveillance of its ∼20 tributary glaciers has revealed a response which is varied and complex in both space and time. The major outlets have accelerated and thinned, smaller glaciers have shown little or no change, and glaciers flowing into the remnant Scar Inlet Ice Shelf have responded with delay. In this study we present the first areawide numerical analysis of glacier dynamics before and immediately after the collapse of the ice shelf, combining new data sets and a state‐of‐the‐art numerical ice flow model. We simulate the loss of buttressing at the grounding line and find a good qualitative agreement between modeled changes in glacier flow and observations. Through this study, we seek to improve confidence in our numerical models and their ability to capture the complex mechanical coupling between floating ice shelves and grounded ice.