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Permafrost Degeneration in the East of Tibetan Plateau

Zhu Linan; Wu Ziwang and Liu Yongzhi(State Key Laboratory of Frozen Soil Engineering. LIGG, CAS. 730000)  
The zoning boundaries of permafrost are theoretically determined from the relation between permafrost and modern climate in this paper. The boundary elevations are given in a profile. There are many phenomena demonstrating a commom degeneration such as buried frozen soil, pseudo-permafrost landforms variations of patchy permafrost table,multigelation, and vegetation changing in different regions. The important conclusion is that a basic trend of the permafrost changing in the plateau is degeneration.
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