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《Journal of Glaciology and Geocryology》 1986-04
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Frozen Ground in the Altay Mountains of China

Tong Boliang, Li Shude and Zhang Tingjun (Lanzhou Institute of Glaciology and Geocryology, Chinese Academy of Sciences)  
Frozen ground in the Altay Mountains of China can be divided into three zones: seasonally frozen ground, sporadic permafrost, and widespread permafrost. In seasonally frozen ground, the depth of the thawed layer is 0.8-1.0m in the peat layer, 0.9-1.6m in the loam layer, and over 1.9m in sandy gravel sediments; the mean annual ground temperature is not lower than - 1.0℃. The sporadic permafrost zone is situated between 2200 m and 2800m a.s.l. In general, permafrost islands are distributed in peat layers in marshy depressions and in caves on northfacing slopes. Some peat palsens with 1 to 2 m ice layers were found. The widespread permafrost thickness is estimated to be less than 400 m, and the mean annual ground temperature is higher than -5℃. The lower limits of the permafrost in the last glacial period and Neoglaciation were 750-900m and 400-600m respectively, lower than those at present. The permafrost in the sporadic zone was formed during the Neoglaciation, while the lower part of the permafrost layer in the widespread permafrost zone was probably formed during the last glacial period.
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【References】
Chinese Journal Full-text Database 1 Hits
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【Co-references】
Chinese Journal Full-text Database 10 Hits
1 Guo Dongxin, Wang Shading (Lanzhou Institute of Glaciology and Cryopedology, Acadcmia Sinica) Lu Guouwei (Yakeshi Forestry Survey and Design Institte, Ministry of Forestry) Dan Jingbe Li Enying ( Third Survey and Design Institute, Ministry of Railway);DIVISION OF PERMAFROST REGIONS IN DAXIAO HINGGAN LING NORTHEAST CHINA[J];Journal of Glaciology and Geocryology;1981-03
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【Secondary References】
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