Zhu et al. (2026) Reduced glacier mass loss rates on the southern Tibetan Plateau during a global warming hiatus

Identification

• Journal: Global and Planetary Change
• Year: 2026
• Date: 2026-04-08
• Authors: Meilin Zhu, Sheng Wang, Xuelin Gao, Shihang Bai, Fengying Zhang, Fei ZHU, Huabiao Zhao
• DOI: 10.1016/j.gloplacha.2026.105476

Research Groups

• Center for the Pan-Third Pole Environment, Lanzhou University, Lanzhou, China
• College of Geography Science, Shanxi Normal University, Taiyuan, China
• Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences (CAS), Beijing, China
• College of Surveying and Geo-Informatics, Tongji University, Shanghai, China
• College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, China
• College of Atmospheric Sciences, Lanzhou University, Lanzhou, China
• Ngari Station for Desert Environment Observation and Research, Institute of Tibetan Plateau Research, CAS, Xizang, China

Short Summary

This study investigates the mechanism behind a reduced glacier mass loss rate on the southern Tibetan Plateau during 1996–2008, a period overlapping with the global warming hiatus. It finds that increased ablation-season precipitation and cloud cover, linked to specific atmospheric circulation patterns, drove this slowdown by reducing incoming shortwave radiation and increasing surface albedo.

Objective

• To investigate the mechanism driving the "glacier mass loss rate slowdown" observed on the southern Tibetan Plateau during the 1990s–2000s, a period coinciding with the global warming hiatus, and to understand how internal climate variability modulates long-term glacier evolution.

Study Configuration

• Spatial Scale: Southern Tibetan Plateau (specifically south-central TP, with regional coherence confirmed across multiple glaciers on the southern TP).
• Temporal Scale: 1960–2019 for interdecadal components analysis; pronounced slowdown identified during 1996–2008; comparison period 1980–2019.

Methodology and Data

• Models used: Nine-year Gaussian filtering method (for isolating interdecadal components of glacier mass balance).
• Data sources: Reconstructed glacier mass balance data; long-term mass balance records from multiple glaciers.

Main Results

• Interdecadal variability accounts for 31.3% of the total glacier mass balance variance.
• This interdecadal variability is primarily controlled by ablation-season (June–September) air temperature and precipitation.
• A significant reduction in glacier mass loss occurred during 1996–2008, with the mean mass balance being 240 mm water equivalent per year (w.e. a⁻¹) above the 1980–2019 average.
• This slowdown was driven by a 23.6 mm increase in ablation-season precipitation and a 0.02 increase in cloud cover.
• These climatic changes collectively reduced incoming shortwave radiation by 3 W m⁻² and increased surface albedo by 0.04, leading to enhanced snowfall and suppressed melting.
• The mass loss slowdown is a regionally coherent phenomenon across the southern Tibetan Plateau.
• The observed climatic anomalies are linked to a concurrent positive phase of the Atlantic Multidecadal Oscillation, an intensified Indian summer monsoon, and a negative phase of the Interdecadal Pacific Oscillation.

Contributions

• Provides a novel method for extracting interannual and interdecadal components of glacier mass balance.
• Enhances the understanding of how internal climate variability influences long-term glacier evolution on the Tibetan Plateau.
• Identifies specific climatic drivers and large-scale atmospheric circulation patterns responsible for the observed glacier mass loss slowdown on the southern Tibetan Plateau during the global warming hiatus period.

Funding

• [No specific funding information was provided in the text.]

Citation

@article{Zhu2026Reduced,
  author = {Zhu, Meilin and Wang, Sheng and Gao, Xuelin and Bai, Shihang and Zhang, Fengying and ZHU, Fei and Zhao, Huabiao},
  title = {Reduced glacier mass loss rates on the southern Tibetan Plateau during a global warming hiatus},
  journal = {Global and Planetary Change},
  year = {2026},
  doi = {10.1016/j.gloplacha.2026.105476},
  url = {https://doi.org/10.1016/j.gloplacha.2026.105476}
}