RT Journal T1 Using attributes of electromagnetic waves to determine the water content and frost table in a permafrost area A1 ZhiChun Zhang, YuPeng Shen, Xiao Wang, YaHu Tian, JianKun Liu, Bagdat Teltayev PB Sciences in Cold and Arid Regions FD 2017-06-01 YR 2017 JF Sciences in Cold and Arid Regions JO Sciences in Cold and Arid Regions VO 9 IS 3 SP 261 DO 10.3724/SP.J.1226.2017.00261 K1 permafrost thawing;ground-penetrating-radar;geophysical attribute;relative water content LK {http://www.scar.ac.cn/EN/article/article_87.shtml}