Zhao et al. (2026) Westerly induced precipitation increase drives near-surface ground ice gain on the Tibetan Plateau despite warming

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Science Advances
• Year: 2026
• Date: 2026-07-23
• Authors: Yi Zhao, Dongfeng Li, Jan Nitzbon, Zhuotong Nan, Young-Chul Song, Xie Hu, Youhua Ran, Rui Deng, Yingzhong Luo, Yiyi Li
• DOI: 10.1126/sciadv.aed1105

Research Groups

• Key Laboratory of Cryosphere and Deep Space Exploration, Chinese Academy of Sciences
• State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University
• Institute for Climate and Application Research, Chinese Academy of Sciences

Short Summary

This study investigates the anomalous increase in ground ice at the active layer bottom on the Tibetan Plateau despite climate warming, identifying strengthened westerlies as a driving mechanism. The findings highlight that rapid precipitation increase can locally outweigh temperature in driving cryosphere evolution.

Objective

• Investigate the mechanisms behind local accumulation of ground ice under global warming conditions

Study Configuration

• Spatial Scale: The study focuses on the interior Tibetan Plateau, covering 35% of the plateau's permafrost area.
• Temporal Scale: The analysis spans multiple years, with a focus on recent field evidence and climate trends.

Methodology and Data

• Models used: A physics-based permafrost model was employed to simulate ground ice dynamics.
• Data sources: Borehole ground ice observations, satellite-based ground deformation data, and climate reanalysis products were utilized.

Main Results

• Anomalous increase in ground ice at the active layer bottom on the Tibetan Plateau despite climate warming.
• Strengthened westerlies enhance precipitation, supplying additional soil moisture that refreezes and drives this unexpected ice gain.
• Freeze-thaw process associated with accumulated ice amplifies ground deformation, destabilizing permafrost landscapes.

Contributions

• This study provides new insights into the complex interactions between climate change, precipitation patterns, and cryosphere evolution on the Tibetan Plateau.
• The findings highlight the importance of considering local-scale processes in understanding global climate trends.

Funding

• National Natural Science Foundation of China (Grant No. 42161148004)
• Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA19050101)

Citation

@article{Zhao2026Westerly,
  author = {Zhao, Yi and Li, Dongfeng and Nitzbon, Jan and Nan, Zhuotong and Song, Young-Chul and Hu, Xie and Ran, Youhua and Tian, Shang and Deng, Rui and Luo, Yingzhong and Li, Yiyi},
  title = {Westerly induced precipitation increase drives near-surface ground ice gain on the Tibetan Plateau despite warming},
  journal = {Science Advances},
  year = {2026},
  doi = {10.1126/sciadv.aed1105},
  url = {https://doi.org/10.1126/sciadv.aed1105}
}