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The mean annual temperature at the top of permafrost, the TTOP model, and the effect of unfrozen water

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  • D. W. Riseborough

Abstract

The effect of unfrozen water content on the thermal properties of the ground is discussed in the context of the TTOP model. In soils with a significant freezing characteristic the ratio of unfrozen and frozen conductivities is not single‐valued, which is an assumption of the TTOP model. Numerical simulations of the thermal regime for a range of fine‐grained soils are used to determine the effect of variable soil conductivity on the temperature at the top of permafrost. Results show that the temperature dependent conductivity function can be used with a temperature based on the surface freezing index to estimate an appropriate single value of the frozen conductivity for use in the TTOP model. Copyright © 2002 John Wiley & Sons, Ltd.

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  • D. W. Riseborough, 2002. "The mean annual temperature at the top of permafrost, the TTOP model, and the effect of unfrozen water," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 13(2), pages 137-143, April.
    • Handle: RePEc:wly:perpro:v:13:y:2002:i:2:p:137-143
    DOI: 10.1002/ppp.418
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    Cited by:

    1. Jianan Hu & Shuping Zhao & Zhuotong Nan & Xiaobo Wu & Xuehui Sun & Guodong Cheng, 2020. "An effective approach for mapping permafrost in a large area using subregion maps and satellite data," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 31(4), pages 548-560, October.
    2. Wei Shan & Chengcheng Zhang & Ying Guo & Lisha Qiu & Zhichao Xu & Yan Wang, 2022. "Spatial Distribution and Variation Characteristics of Permafrost Temperature in Northeast China," Sustainability, MDPI, vol. 14(13), pages 1-16, July.

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