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在中国池中加剧甲排放:变暖,环保和深度变化的相互作用

Mingquan Lv¹, Ping Huang¹, Xin Gao¹

¹Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, China.

|April 8, 2025

概括

来自池的全球甲排放量由于变暖和营养丰富而大幅增加. 这项研究模拟了中国的池甲 (CH4) 排放,显示1960年至2020年的排放量增加了9倍,突出了迫切的减缓需求.

科学领域:

环境科学环境科学
气候变化研究气候变化研究
地质化学地质化学

背景情况:

池是全球甲 (CH4) 排放的重要来源.
准确估计历史和未来的池CH4排放是具有挑战性的,因为环境变化,如肥沃化,浅,和全球变暖.

研究的目的:

确定池CH4排放的主要驱动因素.
开发基于过程的预测模型,用于空间显式估计池CH4排放.
分析1960年至2020年间中国池CH4排放的趋势和贡献因素.

主要方法:

综合了674个关于CH4排放率的观察结果.
开发了一个基于过程的模型,包括温度依赖,深度,营养水平和池面积.
应用该模型用于从1960年到2020年在中国的池CH4排放的空间显式估计.

主要成果:

池CH4排放强烈依赖温度 (激活能量为0.834 eV),而激发性排放显示出更高的灵敏度.
度和水深是总CH4流量的关键预测指标.
中国池的CH4排放量从1960年 (0.16 Tg年−1) 到2020年 (1.53 Tg年−1) 增加了九倍,主要是由于变暖,营养丰富,浅化和池扩张.

结论:

池在全球甲排放中发挥着越来越重要的作用.
一半的排放发生在夏季,沸占总排放量的66%.
为了可持续的池管理,需要采取紧急缓解措施,包括减少营养负载和定期疏.

关键词:

甲沸的沸过程富含营养的营养丰富剂小水体是小型的水体.在空间上是显式的.温度的依赖性温度的依赖性

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