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<p>Retrogressive thaw slumps (RTSs) are significant thermokarst features in alpine permafrost environments of Arctic regions and the Tibetan Plateau (QTP), China. These formations contribute substantially to freeze-thaw erosion and organic carbon release, affecting regional ecological dynamics. Despite their importance, geophysical evidence of freeze-thaw erosion in RTS development areas remains limited due to challenging access and insufficient multi-methodological analyses. This study presents a high-resolution geophysical investigation of RTS development in the Beiluhe River Basin, QTP. Using a multi-methodological approach, we quantitatively assess freeze-thaw erosion processes by characterizing lithostratigraphy, ground ice distribution, hydrogeological properties, and deformation patterns across the RTS. Our findings reveal that freeze-thaw processes and lateral thermal erosion from the headwall create significant heterogeneity in soil hydraulic properties along the development direction, with an estimated total volume change of approximately 13,139 m³ in the studied area. These insights illuminate the complex freeze-thaw processes driving RTS development and their ecological implications across the QTP.</p>

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Assessment of freeze-thaw erosion by retrogressive thaw slump on the Qinghai-Tibet Plateau combined with geophysical methods

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月11日

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  • Chenglong Jiao,
  • Fujun Niu,
  • Peifeng He,
  • Jing Luo,
  • Fan Yu

摘要

Retrogressive thaw slumps (RTSs) are significant thermokarst features in alpine permafrost environments of Arctic regions and the Tibetan Plateau (QTP), China. These formations contribute substantially to freeze-thaw erosion and organic carbon release, affecting regional ecological dynamics. Despite their importance, geophysical evidence of freeze-thaw erosion in RTS development areas remains limited due to challenging access and insufficient multi-methodological analyses. This study presents a high-resolution geophysical investigation of RTS development in the Beiluhe River Basin, QTP. Using a multi-methodological approach, we quantitatively assess freeze-thaw erosion processes by characterizing lithostratigraphy, ground ice distribution, hydrogeological properties, and deformation patterns across the RTS. Our findings reveal that freeze-thaw processes and lateral thermal erosion from the headwall create significant heterogeneity in soil hydraulic properties along the development direction, with an estimated total volume change of approximately 13,139 m³ in the studied area. These insights illuminate the complex freeze-thaw processes driving RTS development and their ecological implications across the QTP.