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DOI	10.1016/j.coldregions.2018.06.008
	Factors influencing the reliability of grounded and floating ice distinguishing based on ground penetrating radar reflection amplitude
	You, Yanhui; Yang, Mingbin; Yu, Qihao; Pan, Xicai; Guo, Lei; Wang, Xinbin; Wu, Qingbai
发表日期	2018
ISSN	0165-232X
EISSN	1872-7441
起始页码	1
结束页码	8
卷号	154
英文摘要	Existing grounded ice or floating ice in late winter represents the distinct thermal state of the lake bottom, which regulates the evolution processes of thermokarst lakes. The aim of this study was to identify either grounded ice or floating ice using ground penetrating radar (GPR) and analyze the factors that influence identification. Densely spaced GPR measurements were collected using a pair of 900 MHz antennas in a thermokarst lake on the northeast Qinghai-Tibet Plateau. Numerical simulations were used to evaluate the factors that influence the accuracy and reliability of the GPR detection. Results show that the ice thickness was less than 1.0 m and indicated a spatial difference on the lake. The normalized amplitudes of reflected waves (NAR) were used for discriminating the grounded ice and floating ice. The floating ice was identified by high NAR (higher than 0.3), and the grounded ice was discriminated by low NAR (lower than 0.2). Numerical simulations showed that the sandwiched thin water and frozen sediment layer beneath the lake ice can smooth the amplitude contrasts between the grounded ice and floating ice. The air/water bubbles in ice and undulating ice bottom interfaces scatter the reflection amplitudes significantly. The factors that influence the GPR reflection amplitudes apart from the permittivity contrasts, can lead to notable uncertainties in identifying grounded and floating ice based on NAR.
英文关键词	Ground penetrating radar; Amplitude of reflections; Numerical simulations; Grounded ice; Floating ice
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	ARCTIC COASTAL-PLAIN ; NEAR-SHORE ZONE ; THERMOKARST LAKE ; THAW LAKES ; PERMAFROST ; ORIENTATION ; BENEATH ; DELTA ; RIVER
WOS记录号	WOS:000441870100001
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/240257
作者单位	[You, Yanhui; Yu, Qihao; Guo, Lei; Wang, Xinbin; Wu, Qingbai] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soils Engn, Lanzhou, Gansu, Peoples R China; [Yang, Mingbin] State Grid Qinghai Elect Power Co, Xining, Qinghai, Peoples R China; [Pan, Xicai] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	You, Yanhui,Yang, Mingbin,Yu, Qihao,et al. Factors influencing the reliability of grounded and floating ice distinguishing based on ground penetrating radar reflection amplitude[J]. 中国科学院西北生态环境资源研究院,2018,154.
APA	You, Yanhui.,Yang, Mingbin.,Yu, Qihao.,Pan, Xicai.,Guo, Lei.,...&Wu, Qingbai.(2018).Factors influencing the reliability of grounded and floating ice distinguishing based on ground penetrating radar reflection amplitude.COLD REGIONS SCIENCE AND TECHNOLOGY,154.
MLA	You, Yanhui,et al."Factors influencing the reliability of grounded and floating ice distinguishing based on ground penetrating radar reflection amplitude".COLD REGIONS SCIENCE AND TECHNOLOGY 154(2018).