Results From The Amery Ice Shelf Project
Results From The Amery Ice Shelf Project
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DOI：
10.3189/s0260305500002494
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发表时间：
1982
影响因子：
2.9
通讯作者：
W. Budd;M. Corry;T. H. Jacka
中科院分区：
文献类型：
--
作者：
W. Budd;M. Corry;T. H. Jacka
在1968年的一次越冬探险工作之后，介绍了对阿莫里冰架的全面研究的主要结果，并补充了1969至1971年夏季的进一步测量。该方案包括冰芯钻探、冰层移动和光学水准测量的积雪测量、冰层厚度探测和积雪测量。获得的新数据为更准确地评估冰架的物质平衡和动态提供了基础，而不是以前的调查。结果表明，在冰层厚度大于450m的内陆冰架下有大量的基冰生长，向冰锋方向的高应变减薄与水平冰平流基本平衡。冰架上的速度分布主要由冰锋的表面坡度和冰架两侧的高约束剪应力决定。
The major results from a comprehensive study of the Amery Ice Shelf are presented, following the work of a wintering expedition in 1968 and supplemented by further measurements during the summer seasons of 1969 to 1971. The Programme included ice-core drilling, oversnow surveys for ice movement and optical levelling, ice-thickness sounding, and measurements of snow accumulation. The new data obtained provide the basis for a more accurate assessment of the mass balance and dynamics of the ice shelf than was possible from the earlier surveys. The results indicate a substantial growth of basal ice under the ice shelf inland where the ice thickness is greater than 450 m. Further towards the ice front the high strain thinning is approximately balanced by the horizontal ice advection. The velocity distribution over the ice shelf is primarily governed by a substantial surface slope towards the ice front and high restraining shear stress along the sides.