High-resolution radar mapping of internal layers of a subpolar ice cap, King George Island, Antarctica
High-resolution radar mapping of internal layers of a subpolar ice cap, King George Island, Antarctica
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南极洲乔治王岛副极地冰盖内层的高分辨率雷达测绘
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. Simões
中科院分区：
文献类型：
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作者：
J. M. Travassos;J. Simões
为了研究南极乔治王岛亚极冰盖的结构和水文特征，进行了一次探地雷达调查。这项研究是对兰格冰川(62◦07‘S，58◦36’W)物质平衡的更大调查的一部分，兰格冰川是一个正在消退的出口冰块。在所有反射剖面中，最强的信号是由于自由水的存在。各部分显示，较强的近地表反射器位于地下水位上方较弱的反射器上。在地下水位以下，反射镜再次变得坚固，显示出许多到达地段末端的离散事件。不同的天线配置导致了同一地下雷达响应的重要差异。附近的冰雪核心被用来校准探地雷达图像的顶部。
A GPR survey was carried out to investigate the structure and hydrology of King George Island subpolar ice cap, Antarctica. This study was part of a larger investigation on the mass balance of Lange Glacier (62 ◦ 07’S, 58 ◦ 36’W), an outlet ice mass that is receding. The strongest signal in all reflection profiles is due to the presence of free water. Sections show strong near-surface reflectors sitting on weaker ones above the water table. Below the water table, reflectors become strong again, displaying many discrete events that reach the end of the sections. Varying antenna configuration causes an important distinction in radar response for the same subsurface. A nearby snow and ice core was used to calibrate the top section of the GPR images.