Numeric simulation of permafrost degradation in the eastern Tibetan Plateau

Dongqing Li, Jin Chen, Qingzhou Meng, Dengke Liu, Jianhong Fang and Jiankun Liu

Permafrost and Periglacial Processes, 2008, vol. 19, issue 1, 93-99

Abstract: Rates of permafrost degradation at both the permafrost table and the base of permafrost were simulated using a prescribed rate of increase in mean annual air temperatures of 0.04°C/a for a site in continuous permafrost near Changshitou Mountain, eastern Tibetan Plateau. The results indicate that over 110 years, the permafrost table descends from a depth of 1.20 m to 1.48 m, and that the base of permafrost rises from the initial value of 55.0 m to 15.2 m. The predicted rate of basal permafrost degradation in low moisture content bedrock reaches a peak of 0.58 m/a after 60 years, assuming a constant thermal gradient at the base of 0.018°C/m. The permafrost is persistent due to the ice‐rich nature of the near‐surface soil layers. Copyright © 2008 John Wiley & Sons, Ltd.

Date: 2008
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Persistent link: https://EconPapers.repec.org/RePEc:wly:perpro:v:19:y:2008:i:1:p:93-99

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