| 祁连山老虎沟12号冰川冰内结构特征分析 |
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| 引用本文： | 武震,张世强,刘时银,杜文涛.祁连山老虎沟12号冰川冰内结构特征分析[J].地球科学进展,2011,26(6):631-641. |
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| 作者姓名： | 武震 张世强 刘时银 杜文涛 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所,冰冻圈科学国家重点实验室,甘肃兰州,730000
2. 中国科学院寒区旱区环境与工程研究所,冰冻圈科学国家重点实验室,甘肃兰州,730000;中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室,祁连山冰川与生态环境综合观测研究站,甘肃兰州,730000 |
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| 基金项目： | 科技部基础性工作专项项目“中国冰川资源及其变化调查”(编号:2006FY110200); 中国科学院知识创新工程重要方向项目“冰碛湖耦合关系及对冰碛湖溃决机理影响研究”(编号:KZCX2-YW-Q03-04);中国科学院知识创新工程项目“中国冰川资源及其变化调查”(编号:KZCX2-YW-GJ04)资助 |
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| 摘 要： | 利用探地雷达(Ground Penetration Radar,GPR)调查冰川冰内结构和冰层厚度是一种监测冰川变化常用手段.应用麦克斯维(Maxwell)方程的二维时域有限差分(FDTD)方法,通过将模拟图像与老虎沟12号冰川的实测图像的对比,分析了雷达剖面中的几种反射特征,如冰裂隙、融洞、暖冰等.对比结果表明,GP...
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| 关 键 词： | 探地雷达 老虎沟12号冰川 时域有限差分 模拟 |
Structural Characteristics of the No.12 Glacier in Laohugou Valley,Qilian Mountain Based on the Ground Penetrating Radar Combined with FDTD Simulation |
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| Wu Zhen,Zhang Shiqiang,Liu Shiyin,Du Wentao.Structural Characteristics of the No.12 Glacier in Laohugou Valley,Qilian Mountain Based on the Ground Penetrating Radar Combined with FDTD Simulation[J].Advance in Earth Sciences,2011,26(6):631-641. |
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| Authors: | Wu Zhen Zhang Shiqiang Liu Shiyin Du Wentao |
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| Institution: | 1.State Key Laboratory of Cryospheric Science, Cold and Arid Regions Environmental and Engineering Research, Institute,Chinese Academy of Sciences,Lanzhou730000, China; ;
2.Qilian Mountain Station of Glaciology and Ecologic Environmental of State Key Laboratory of Cryospheric Science, Cold and Arid Regions Environmental and Engineering Research,Institute, Chinese Academy of Sciences, Lanzhou730000, China |
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| Abstract: | The use of ground penetration radar（GPR）for surveying glacial structure and ice thickness is a common method of monitoring glacial variation, but how to extract accurately the information and ice thickness is often more concerned about data interpretation. In this paper, we have run a Finite-Difference Time-Domain (FDTD) model that solves Maxwell′s equations in two dimensions, by comparison simulated image and the results of measured radar, and analyzed several reflection characteristics within several profiles, such as crevasses, melting cave, and temperate ice and so on. Comparison results show that GPR reflection image is affected by many factors, such as medium thickness, morphology, roughness and other factors as well in addition to dielectric constant.The survey result also shows that the ice body temperature at Lao hugou valley No.12 glacier as polar continental glacier presents a higher trend. Meteorological and historical data indicate that the retreat and ablation of glaciers have been aggravated in recent years. Meanwhile, GPR combined with FDTD simulation provides good analytical tools for monitoring glacial variation along with climate change in our future. |
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| Keywords: | GPR The No 12 Glacier in Lao hugou Valley FDTD Simulation |
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