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Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside
Published on: July 3, 2016
Abrupt permafrost thaw drives exceptional carbon release across the Tibetan Plateau
Yunjie Jia1, Chunling Zhang1, Mei Mu1,2
1Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Observation and research station on Eco-Environment of Frozen Ground in the Qilian Mountains, Lanzhou University, Lanzhou, China.
Abstract:
Climate warming is accelerating abrupt permafrost thaw, driving substantial carbon emissions. Retrogressive thaw slumps (RTSs) represent the most severe instance of abrupt permafrost thaw, yet their carbon emissions remain poorly quantified due to limited observations. Here, by synthesizing 4728 RTS incidents and 1862 in-situ CO2 and CH4 measurements from RTS-affected zones across the Tibetan Plateau, we estimate that the area of RTS susceptibility will expand by 17-19% by 2100 relative to 2022, driven primarily by precipitation changes. Compared to control areas, the ecosystem respiration rate in collapsed areas decreases by 14.4%, while CH4 release rate increases by 20.0%. The combined CO2 and CH4 release associated with RTS expansion increased 1.1-fold between 2016 and 2022. Under the intermediate Shared Socioeconomic Pathways scenario, carbon emissions from RTS-susceptible areas are projected to surge 2.7-fold by 2100. These findings highlight that abrupt thaw strengthens permafrost carbon-climate feedback in high-altitude regions, underscoring the urgent need for targeted permafrost protection strategies to achieve carbon neutrality goals.
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