利用三维GPR探测北极夏季海冰厚度及下表面形态特征分析  

THE APPLICATION OF THE 3D GPR METHOD TO MEASURING THE DEPTH OF ARCTIC SUMMER SEA ICE AND ANALYZING ITS UNDERSIDE MORPHOLOGY

作　　者：王帮兵[1] 孙波[2] 田钢[3] 郭井学[1] 汪大立[2] 

机构地区：[1]吉林大学地球探测科学与技术学院,吉林长春130026 [2]中国极地研究中心,上海200129 [3]浙江大学理学院地球科学系,浙江杭州310027

出　　处：《物探与化探》2007年第3期189-192,283,284,共6页Geophysical and Geochemical Exploration

基　　金：自然科学基金资助(40476005;40231013);科技部公益项目(2005DIB3J114);863项目(2006AA09Z152;2006AA04Z206)

摘　　要：海冰在全球气候系统中扮演着重要角色。在中国第二次北极科学考察中,使用3D雷达探测结合冰钻进行海冰测量。雷达剖面上可清楚识别冰-水界面,与冰钻测量结果较好地吻合。雷达3D图像清晰显示了冰底界面在3D方向的起伏变化以及冰内构造的空间展布情况。对三维探测区域内海冰厚度统计显示,所测冰盘的平均厚度为4.15 m,较厚的区域位于左下角,最大厚度约为6.4 m,较薄的区域是在中央和左上角区域,最小的厚度小于3.0m。经过进一步计算可提供如海冰上下表面面积、海冰体积等参数,为遥感和数值模拟提供地面校核数据,也为海冰形成机制和动力作用过程研究提供佐证和依据。Sea ice plays an important role in the global climate system. The authors combined 3D GPR with drilling during China＇s second national Arctic research expedition. The interface of ice and sea water can be recognized clearly from the GPR section, consistent with the drilling result. 3D GPR Cube illustrates distinctly the underside morphology and the spatial spreading of inner structure of the Arctic sea ice. After additional calculation, some parameters, such as the upper and bottom surface areas and the volume of sea-ice, can be figured out and then serve as on-the-spot checkout data for the remote sensing and the data simulator. These data also provide the evidence and proof for the study of the formation mechanism and the course of dynamic effect of the sea ice.

关 键 词：北极海冰 探地雷达(GPR) 三维勘探 偏移处理 

分 类 号：P631[天文地球—地质矿产勘探]