Tibetan Plateau Ground Ice Thickens Despite Warming
Research published in Science Advances in July 2026 links rising precipitation to ice gains across more than a third of plateau permafrost.
Updated on Nov. 4, 2026 in Environmental
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Researchers at Peking University found that shallow ground ice has increased across the Tibetan Plateau over the past 20 years, affecting more than a third of the plateau's permafrost. The study, published in Science Advances in July 2026, is research-stage evidence drawn from satellite data and 369 boreholes.
Why it matters
The plateau is warming at about twice the global average, yet the findings show ground ice thickening in parts of the region, a result that complicates simple assumptions about permafrost loss. The researchers attribute the gain mainly to rising precipitation that infiltrated the active layer and refroze.
The study reconstructed 40 years of near-surface ground ice variation using satellite observations and borehole records, with a machine learning and permafrost modelling approach. Its central figures are a 60 per cent rise in precipitation since 2000 and ice gains across more than a third of plateau permafrost, but the stability consequences of that gain are unresolved.
The players
Peking University
A leading Chinese university whose research team conducted the Tibetan Plateau ground ice study.
Science Advances
The peer-reviewed journal in which the ground ice study was published.
The details
Permafrost is ground that stays frozen year-round, and the active layer is the upper portion that thaws each summer. The team combined satellite data with observations from 369 boreholes, which are narrow holes drilled into the ground for measurement, and used machine learning to reconstruct how water content changed down to 3.2 metres between 1979 and 2018. Extra precipitation seeped to the base of the active layer and refroze in the permanently sub-zero ground, adding to the ice.
Timeline
1979–2018: period of reconstructed water content changes.
July 2026: study published in Science Advances.
The Tech Race
Gansu research team increased glacier ice thickness by 10cm using thermal-insulating reflective fabric, a separate Chinese Academy of Sciences effort in Sichuan that has covered part of a glacier with reflective nanofilm each year since 2022. The glacier-protection method is not applicable to all glaciers, and researchers project it could extend that glacier's lifespan by at least three to four times.
The findings bear on infrastructure and land use across the plateau, where permafrost stability affects the ground beneath roads and buildings. Practical consequences for residents or industries have not been established, and the study is research-stage.
The takeaway
The finding that ground ice can thicken even as the plateau warms suggests permafrost change will not be uniform. Watch for follow-up research on whether the ice gain persists and how it affects permafrost stability.
Further reading
Explore more reporting in our Environmental section for context on how warming and precipitation are reshaping landscapes.
Source note: This article includes information reported by South China Morning Post.
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