RT Journal T1 Thermal influence of ponding and buried warm-oil pipelines on permafrost: a case study of the China-Russia Crude Oil Pipeline A1 YanHu Mu,MingTang Chai,GuoYu Li,Wei Ma,Fei Wang,YaPeng Cao PB Sciences in Cold and Arid Regions FD 2020-04-30 YR 2020 JF Sciences in Cold and Arid Regions JO Sciences in Cold and Arid Regions VO 12 IS 2 SP 59 DO 10.3724/SP.J.1226.2020.00059. K1 ;ponding;heat transfer modeling;oil pipeline;permafrost;thaw depth LK {http://www.scar.ac.cn/EN/article/article_303.shtml}