ESTIMATION OF SURFACE SOIL HEAT FLUX IN PERMAFROST IN QINGHAI-TIBET PLATEAU

Li Xiao; Zhao Lin; Li Yan; Li Xiangfei; Zhao Jianting; Xiao Minxuan

doi:10.19912/j.0254-0096.tynxb.2023-1596

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (2) : 124-134. DOI: 10.19912/j.0254-0096.tynxb.2023-1596

ESTIMATION OF SURFACE SOIL HEAT FLUX IN PERMAFROST IN QINGHAI-TIBET PLATEAU

Li Xiao, Zhao Lin, Li Yan, Li Xiangfei, Zhao Jianting, Xiao Minxuan

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Abstract

The ground heat fluxes at two observation sites, TGL and XDT, in the permafrost zone of the Qinghai-Tibet Plateau from 2010 to 2012 are estimated based on the half-order method using observations combined with remotely sensed data, and compared and analyzed with “observations” （the ground heat flux is calculated from the observations of the soil heat flux at depth of 10 cm and the soil temperature at depth of 5 cm） and the three remote sensing estimation methods （GLEAM, PM-RS, and the combined method）. The results show that 1） the G₀ estimated by the half-order method is in good agreement with the observed G0, and the estimation accuracy is high; 2） the half-order method performs better than the GLEAM, PM-RS and the combined methods, with the R of the estimated G0 for the two sites of 0.85 and 0.81, respectively, and the Bias of

Key words

permafrost / geothermal energy / heat flux / half-order method / Qinghai-Tibet Plateau

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Li Xiao, Zhao Lin, Li Yan, Li Xiangfei, Zhao Jianting, Xiao Minxuan. ESTIMATION OF SURFACE SOIL HEAT FLUX IN PERMAFROST IN QINGHAI-TIBET PLATEAU[J]. Acta Energiae Solaris Sinica. 2025, 46(2): 124-134 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1596

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