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Small-scale modeling of ice flow perturbations induced by sudden ice shelf breakup

机译：冰架突然破裂引起的冰流扰动的小规模模拟

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The sudden breakup of ice shelves is expected to result in significant acceleration of inland glaciers, a process related to the removal of the buttressing effect exerted by the ice shelf on the tributary glaciers. In this paper, this process is analyzed by means of scaled analogue experiments reproducing the flow of a valley glacier draining an ice sheet grounded above sea level into an ice shelf, and analyzing the dynamic perturbations resulting from ice shelf disintegration and removal of buttressing effect. Models show a significant increase in glacier velocity close to its outlet following ice shelf breakup, a transient effect that does not significantly propagate upstream towards the ice sheet and rapidly decays with time. Basal lubrication and variations in ice thickness do not significantly influence the process that thus leaves the ice sheet almost unaffected by flow perturbations. (C) 2014 Elsevier B.V. All rights reserved.
机译：预计冰架的突然破裂将导致内陆冰川的显着加速，这与消除冰架对支流冰川施加的支撑作用有关。在本文中，通过规模化的模拟实验对这一过程进行了分析，该实验模拟了将冰川沉积物从海平面上流下的冰层排入冰架的过程，并分析了由于冰架解体和消除支撑作用而引起的动态扰动。模型显示，在冰架破裂后，靠近其出口的冰川速度显着增加，这是一种瞬时效应，不会明显地向上游向冰原传播，并随时间迅速衰减。基础润滑和冰层厚度的变化不会显着影响过程，从而使冰盖几乎不受流量扰动的影响。 （C）2014 Elsevier B.V.保留所有权利。

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