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《Journal of Glaciology and Geocryology》 2018-02
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Temporal and spatial variations of the maximum frozen depth of seasonally frozen soil in Tibet from 1990 to 2014

GAO Siru;ZENG Wenzhao;WU Qingbai;JIANG Guanli;ZHANG Zhongqiong;State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences;No .915 Hydrogeological and Engineering Geological Team,Sichuan Bureau of Geology and Mineral Resources;  
The maximum frozen depth is the major index of the change in seasonally frozen soil. It is also an important parameter for the engineering design,construction and operation in seasonal frozen soil regions. The maximum frozen depth of seasonal frozen soil in Tibet from 1990 to 2014 were calculated by Stefan' s method.The temporal and spatial variations of the maximum frozen depth were analyzed. The results indicated that the spatial distribution of the maximum frozen depth in Tibet had the characteristics of vertical zonality,latitude zonality and regional regularity,which had basically decreased from northwest to southeast from 1990 to 2014. In the context of global warming,the maximum frozen depth had decreased from 1990 to 2014. The maximum frozen depth had a negative correlation with the annual mean temperature and annual precipitation; the maximum frost depth decreased with the increase of annual mean temperature and annual precipitation. Beside,the response of maximum frozen depth to annual mean temperature was more significant than that to annual precipitation.
【Fund】: 西藏自治区项目“冻土地质灾害调查与防治技术研究”;; 中国科学院STS项目(HHS-TSS-STS-1502);中国科学院西北生态环境资源研究院青年人才成长基金(51Y651K31);; 国家自然科学基金项目(41330634;41601073);; 冻土工程国家重点实验室自主研究课题(SKLFSE-ZQ-36)资助
【CateGory Index】: P642.14
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