Arctic peatland response to climate change: carbon bomb or self-repair?

北极泥炭地应对气候变化：碳炸弹还是自我修复？

• 批准号: 2889787
• 金额: --
• 依托单位: Queen's University Belfast
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2889787
• 关键词: Arctic; peatland; response; climate; change

This research project will focus on changes in Arctic peatland dynamics, particularly regarding their significant carbon store, as a result of climate change and associated permafrost thaw. Permafrost peatlands contain approximately 227 Pg of carbon, equivalent to 14% of the global soil carbon store, which has been rendered effectively inert due to frozen soil conditions. However, with estimated increases in global mean surface temperatures of between 0.3 and 4.8 degrees by the end of the 21st century, which is predicted to be greater in Arctic regions, this leaves this carbon store vulnerable to repaid decomposition due to widespread permafrost thaw. This has huge implications for global warming potential as a result of increased greenhouse carbon gas fluxes (methane and carbon dioxide) to the atmosphere; which is rarely considered in current climate simulation models. Therefore, it is essential that a thorough understanding of this climate feedback system is understood.

该研究项目将着重于北极泥炭地动力学的变化，特别是由于气候变化和相关的多年冻结融化而导致其重要的碳储存。多年冻土泥炭地含有大约227 pg的碳，相当于全球土壤碳储存的14％，由于土壤条件的冷冻条件，该碳含有有效惰性。但是，到21世纪末，由于估计全球平均表面温度在0.3至4.8度之间的升高，预计在北极地区，这将使该碳储存量较大，因此由于长期鲜红色的融化而容易偿还的分解。由于温室气通量增加（甲烷和二氧化碳）对大气的增加，这对全球变暖潜力具有巨大的影响。在当前的气候模拟模型中很少考虑。因此，必须了解这种气候反馈系统的透彻理解。