| Studies on frozen ground of China |
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| 作者姓名： | ZHAO Lin CHENG Guodong DING Yongjian |
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| 作者单位： | Cold and Arid Regions Environmental and Engineering Research Institute，Lanzhou 730000，China |
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| 基金项目： | Knowledge Innovation Project of CAS，No.KZCX1-SW-04，No.KZCX3-SW-339-3，National Natural Science Foundation of China，No.40371026 |
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| 摘 要： | 1ThestatusoffrozengroundinChinaBased on previous studies, Zhou and Guo (1982) summarized the distribution characteristics of permafrost in China and indicated that the permafrost area in China is about 215×104 km2, in which about 163.4×104 km2 is on the Tibetan Plateau. After mapping and zonation of frozen ground in 1983, Xu and Wang suggested that the areas of permafrost, seasonally frozen ground and temporal frozen ground in China were 206.8×104 km2, 513.7×104 km2 and 229.1×104 km2 …
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| 收稿时间： | 10 July 2004 |
| 修稿时间： | 15 September 2004 |
Studies on frozen ground of China |
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| ZHAO Lin,CHENG Guodong,DING Yongjian.Studies on frozen ground of China[J].Journal of Geographical Sciences,2004,14(4):411-416. |
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| Authors: | ZHAO Lin CHENG Guodong DING Yongjian |
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| Institution: | (1) Cold and Arid Regions Environmental and Engineering Research Institute, 730000 Lanzhou, China |
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| Abstract: | Permafrost in China includes high latitude permafrost in northeastern China, alpine permafrost in northwestern China and high plateau permafrost on the Tibetan Plateau. The high altitude permafrost is about 92% of the total permafrost area in China. The south boundary or lower limit of the seasonally frozen ground is defined in accordance with the 0 oC isothermal line of mean air temperature in January, which is roughly corresponding to the line extending from the Qinling Mountains to the Huaihe River in the east and to the southeast boundary of the Tibetan Plateau in the west. Seasonal frozen ground occurs in large parts of the territory in northern China, including Northeast, North, Northwest China and the Tibetan Plateau except for permafrost regions, and accounting for about 55% of the land area of China. The southern limit of short-term frozen ground generally swings south and north along the 25o northern latitude line, occurring in the wet and warm subtropic monsoon climatic zone. Its area is less than 20% of the land area of China. |
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| Keywords: | permafrost frozen ground China |
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