Application of ground-penetrating radar imagery for three-dimensional visualisation of near-surface structures in ice-rich permafrost, Barrow, Alaska
Application of ground-penetrating radar imagery for three-dimensional visualisation of near-surface structures in ice-rich permafrost, Barrow, Alaska
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DOI：
10.1002/ppp.594
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发表时间：
2007-10-01
影响因子：
5
通讯作者：
Kimble, John M.
中科院分区：
文献类型：
--
作者：
Munroe, Jeffrey S.;Doolittle, Jim A.;Kimble, John M.
利用三维探地雷达（3D GPR）研究了美国阿拉斯加州巴罗（Barrow）附近冰冻活动层和近地表多年冻土的冰楔多边形地下结构及其他特征。调查在三个地点进行，地点位于不同的地貌时代。在每个地点，沉积物岩心都被收集和表征，以帮助解释GPR数据。在两个地点，3D探地雷达能够高保真地描绘出地下冰楔网。三维探地雷达数据还揭示了这两个地点冰楔形态的根本差异，这与景观年龄的差异一致。在第三个地点，二维和三维探地雷达的结合揭示了具有共济冷冻结构的活跃霜沸腾的位置。当辅以土壤岩心分析时，3D GPR为永久冻土环境中近地表土壤和冰结构的成像、解释和3D制图提供了相当大的潜力。版权所有(C) 2007约翰威利父子有限公司
Three-dimensional ground-penetrating radar (3D GPR) was used to investigate the subsurface structure of ice-wedge polygons and other features of the frozen active layer and near-surface permafrost near Barrow, Alaska. Surveys were conducted at three sites located on landscapes of different geomorphic age. At each site, sediment cores were collected and characterised to aid interpretation of GPR data. At two sites, 3D GPR was able to delineate subsurface ice-wedge networks with high fidelity. Three-dimensional GPR data also revealed a fundamental difference in ice-wedge morphology between these two sites that is consistent with differences in landscape age. At a third site, the combination of two-dimensional and 3D GPR revealed the location of an active frost boil with ataxitic cryostructure. When supplemented by analysis of soil cores, 3D GPR offers considerable potential for imaging, interpreting and 3D mapping of near-surface soil and ice structures in permafrost environments. Copyright (C) 2007 John Wiley & Sons, Ltd.