黄河源区多年冻土温度及厚度研究新进展  

New Progress on Permafrost Temperature and Thickness in the Source Area of the Huanghe River

作　　者：罗栋梁[1] 金会军[1] 林琳[1] 何瑞霞[1] 杨思忠[1] 常晓丽[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000

出　　处：《地理科学》2012年第7期898-904,共7页Scientia Geographica Sinica

基　　金：国家自然科学基金委创新群体项目(41121061)资助

摘　　要：利用新布设的冻土孔及原有冻土资料,分析黄河源区冻土温度和厚度的空间分布。源区实测多年冻土年均地温最低为-1.81℃,冻土最厚74 m,均位于巴颜喀拉山北坡的查拉坪。214国道（K445-K604段）沿线多为高温多年冻土（年均地温〉-1℃）,但巴山北坡海拔4 520 m、布青山海拔4 300 m以上,年均地温低于-0.5℃。巴山北坡海拔4 610 m、布青山海拔4 420 m以上,年均地温低于-1℃。巴山北坡海拔每升高100 m,年均地温减少0.47-0.75℃,冻土厚度增加16-25 m;纬度向北增加1°,年均地温减少0.85℃,冻土厚度增加20-30 m。Based on data and information from newly set-up and original permafrost boreholes, the permafrost temperature and thickness in the Source Area of the Huanghe River were analyzed. The lowest permafrost tem- perature at depth of zero annual amplitude （DZZA） （so-called the MAGT） in-situ is -1.81℃, and deepest per- mafrost is 74 m, both are located on the north slope of the Bayan Har Mountains. Most permafrost along the National Highway No.214 （K445-K604） is warm permafrost （with the MAGT〉-1 ℃）. However, with altitude higher than 4 520 m in the north slope of the Bayan Har Mountains, and higher than 4 300 m in the Buqing Mountains, the MAGT is lower than -0.5℃. With altitude higher than 4 610 m in the north slope of the Bayan Har Mountains, and higher than 4 420 rn in the Buqing Mountains, the MAGT is lower than - 1 ~C. In the Bay- an Har Mountains, the MAGT decreases with altitude at rates of 0.47-0.75℃/100 m, and permafrost thickness increase 16-25 m/100 m. Besides, the MAGT decreases with latitude at rates of 0.85℃ and permafrost thick- ness increase about 20-30 m per degree.

关 键 词：多年冻土 黄河源区 214国道 年均地温 冻土厚度 

分 类 号：P642.14[天文地球—工程地质学]