How Thawing Permafrost on the Tibetan Plateau Affects Climate
Author Information
Author(s): Yan Xinwei, Zhang Xu, Liu Bo, Mithan Huw T., Hellstrom John, Nuber Sophie, Drysdale Russell, Wu Junjie, Lin Fangyuan, Zhao Ning, Zhang Yuao, Kang Wengang, Liu Jianbao
Primary Institution: College of Urban and Environmental Sciences, Peking University, Beijing, China
Hypothesis
The study investigates how millennial-scale climate variability influences the timing of permafrost thawing on the Tibetan Plateau compared to circumarctic regions.
Conclusion
The Tibetan Plateau permafrost generally thaws earlier during weak monsoon intervals, which may contribute to increases in atmospheric CO2 during deglaciations.
Supporting Evidence
- Permafrost on the Tibetan Plateau contains a significant amount of soil-organic carbon.
- The study reconstructs permafrost thawing history using speleothem growth data.
- Thawing patterns on the Tibetan Plateau differ from those in circumarctic regions.
- Millennial-scale climate variability influences the timing of permafrost thawing.
- Thawing permafrost can release greenhouse gases, contributing to climate change.
Takeaway
When the weather gets warmer, the frozen ground on the Tibetan Plateau starts to melt earlier than in other cold places, which can release gases that make the Earth warmer.
Methodology
The study used speleothem growth phases to reconstruct the permafrost thawing history over the last 500,000 years on the Tibetan Plateau.
Limitations
The study relies on limited proxies and may not fully capture the complexity of permafrost dynamics across different regions.
Digital Object Identifier (DOI)
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