Modelled response of the volume and thickness of the Antarctic ice sheet to the advance of the grounded area
Modelled response of the volume and thickness of the Antarctic ice sheet to the advance of the grounded area
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DOI：
10.3189/172756410791392808
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发表时间：
2010-07
影响因子：
2.9
通讯作者：
F. Saito;A. Abe‐Ouchi
中科院分区：
文献类型：
--
作者：
F. Saito;A. Abe‐Ouchi
本文对南极冰盖进行了数值试验，研究了冰体积对最近一次冰消期间冰面积变化和气候变化的敏感性。地面面积变化的影响被认为是冰量变化的主要来源，而气候变化的影响较小。冰消期冰量变化对海平面上升的最大可能贡献估计为36米，这涵盖了以往研究中估计的大多数值。在与主要冰架不相连的那些地区，冰盖边缘的推进所产生的影响占总冰量变化的三分之一，这与菲尔希纳-罗恩冰架搁浅的影响以及罗斯冰架和埃默里冰架的共同贡献相当。
Abstract Numerical experiments are performed for the Antarctic ice sheet to study the sensitivity of the ice volume to variations in the area of grounded ice and to changes in the climate during the most recent deglaciation. The effect of the variations in the grounded area is found to be the major source of changes in the ice volume, while the effect of climate change was minor. The maximum possible contribution of the ice-volume change to sea-level rise during the deglaciation is estimated to be 36 m, which covers most values estimated in previous studies. The effect of the advance of the ice-sheet margin over those regions not connected to the major ice shelves contributes one-third of the total ice-volume change, which is comparable to the effect of the grounding of the Filchner–Ronne Ice Shelf and the contribution of the Ross and Amery Ice Shelves together.