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	Factors influencing the reliability of grounded and floating ice distinguishing based on ground penetrating radar reflection amplitude
	You, Yanhui1; Yang, Mingbin2; Yu, Qihao1; Pan, Xicai3; Guo, Lei1; Wang, Xinbin1; Wu, Qingbai1
刊名	COLD REGIONS SCIENCE AND TECHNOLOGY
	2018-10-01
卷号	154页码:1-8
关键词	Ground penetrating radar Amplitude of reflections Numerical simulations Grounded ice Floating ice
ISSN号	0165-232X
DOI	10.1016/j.coldregions.2018.06.008
通讯作者	Yu, Qihao(yuqh@lzb.ac.cn)
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.
收录类别	SCI
WOS关键词	QINGHAI-TIBET PLATEAU ; ARCTIC COASTAL-PLAIN ; NEAR-SHORE ZONE ; THERMOKARST LAKE ; THAW LAKES ; PERMAFROST ; ORIENTATION ; BENEATH ; GPRMAX ; DELTA
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000441870100001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557758
专题	寒区旱区环境与工程研究所
通讯作者	Yu, Qihao
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soils Engn, Lanzhou, Gansu, Peoples R China 2.State Grid Qinghai Elect Power Co, Xining, Qinghai, Peoples R China 3.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]. COLD REGIONS SCIENCE AND TECHNOLOGY,2018,154:1-8.
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,154,1-8.
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):1-8.

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