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在挪威北极区进行的受控泥炭地再湿实验的碳动态

Michael A H Bekken¹, Astrid Vatne¹, Poul Larsen²

¹Department of Geosciences, University of Oslo, Oslo, Norway.

Scientific reports

|December 17, 2025

概括

泥炭地重新湿增加了二氧化碳和甲流. 贝叶斯增量回归树 (BART) 建模量化了这些温室气体排放量,显示在排水后的泥炭地重新被灌后,温室气体排放量显著增加.

科学领域:

环境科学环境科学
生态生态学生态生态学
气候科学气候科学

背景情况:

枯竭的泥炭地是温室气体的重要来源.
重灌是一种恢复泥炭地生态系统和缓解气候变化的共同策略.
了解重新湿对二氧化碳 (CO2) 和甲 (CH4) 流量的影响对于气候建模至关重要.

研究的目的:

为了量化泥炭地重新湿对二氧化碳和CH4流量的影响,使用旋共变率.
应用贝叶斯增量回归树 (BART) 模型来估计年度流量余额和反事实场景.
评估重新湿对挪威泥炭地温室气体排放的短期影响.

主要方法:

对挪威东南部两个相邻的排水泥地进行了受控实验.
自2019年以来,Eddy共变技术用于持续监测CO2和CH4流量.
贝叶斯增量回归树 (BART) 模型利用九个环境变量和流量数据进行年度流量平衡估计和反事实分析.

主要成果:

对照部位 (排水) 的平均年流量为17.3 ± 10 g CO2-C m−2 yr−1和4.6 ± 0.1 g CH4-C m−2 yr−1.1.
经过重新排水后,处理场所的年流量增加了:第一年增加了53.3 ± 13 g CO2-C m−2 yr−1,第二年增加了41.2 ± 18 g CO2-C m−2 yr−1.
巴特反事实建模估计,在两年内,重新加湿将累积流量增加了80.3 ± 49 g CO2-C m−2和3.4 ± 0.47 g CH4-C m−2.

结论:

泥炭土重灌使二氧化碳和CH4流量发生了重大变化,导致短期内排放量增加.
在估计重新加湿对温室气体平衡的反事实影响时,BART建模被证明是有效的.
持续监测至关重要,因为泥炭地生态系统在重新湿后适应改变的水文条件.

关键词:

埃迪的共变性埃迪共变性温室气体流动的温室气体流动挪威挪威挪威挪威挪威皮特兰德地区的泥炭地重新灌湿是什么意思地球上的碳循环.

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