Permafrost degradation along the Qinghai-Tibet Highway from 1995 to 2020

作     者：Zhi-Zhong SUN Wei MA Gui-Long WU Yong-Zhi LIU Guo-Yu LI 

作者机构：State Key Laboratory of Frozen Soil EngineeringNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Da Xing'anling Observation and Research Station of Frozen Ground Engineering and EnvironmentNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesJagdaqi 165000China Beiluhe Observation and Research Station on Frozen Soil Engineering and Environment in QinghaieTibet PlateauNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesGeermu 816000China 

出 版 物：《Advances in Climate Change Research》 (气候变化研究进展（英文版）)

年 卷 期：2023年第14卷第2期

页      面：248-254页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 0706[理学-大气科学] 

基　　金：China's Second Tibetan Plateau Scientific Expedition and Research(2019QZKK0905) the National Natural Science Foundation of China(41571064) the Research Project of the State Key Laboratory of Frozen Soils Engineering(SKLFSE-ZT-202208,SKLFSE-ZY-20) 

主　　题：Permafrost table depth Permafrost temperature Permafrost degradation Qinghai-Tibet Highway Qinghai-Tibet Plateau 

摘      要：Permafrost degradation significantly affects engineering infrastructure,hydrologic processes,landscape and geomorphic processes,ecosystems and carbon cycling in cold *** permafrost degradation along the Qinghai–Tibet Highway(QTH)on the Qinghai–Tibet Plateau,China,introduces an adverse effect on the deformation of the highway *** present,observation of a long series of ground temperatures is *** 1995 to 2020,a monitoring system of ground temperature in 10 natural sites along QTH was built and *** temperatures at different depths were continuously observed *** this study,permafrost changes along QTH were quantitatively investigated based on these *** main results showed that both the permafrost table depth(PTD)and ground temperature at different depths exhibited an increasing trend from 1995 to 2020 with widespread spatiotemporal *** higher the annual mean and range of PTD were,the higher the increase rate in *** increase rates in PTDs in the warm permafrost regions were 6.18 cm per year larger than those in the cold ***,the increase rates in ground temperature decreased with the increase in depth at each *** different depths,the smaller the mean annual ground temperature(MAGT)was,the larger the increase rate in the permafrost *** larger the range of ground temperatures was,the bigger the increase rate in the permafrost *** a depth of 6.0 m,the increase rate in the ground temperature in cold permafrost regions was twice that in warm permafrost *** on the magnitudes and differences in permafrost degradation along QTH is necessary for the design of effective adaption strategies for engineering construction and environment protection in permafrost regions under climatic warming.