摘要
本文系统分析了干旱,高温热浪,寒潮与极端降水等极端气候事件对陆地生态系统碳循环过程的非线性影响机制,通过整合观测数据,控制实验与模型模拟研究表明,极端气候事件不仅直接影响植被光合作用,呼吸作用与凋落物分解等碳循环关键过程,还通过改变土壤水热条件,养分有效性与微生物活性等间接调控碳循环,这些影响表现出显著的时空非线性特征,且存在多重反馈与交互作用。深入理解极端气候事件对碳循环的非线性影响对准确评估全球变暖背景下陆地生态系统碳源汇功能具有重要意义。
This article systematically analyzes the nonlinear impact mechanism of extreme climate events such as drought,heatwaves,cold waves,and extreme precipitation on the carbon cycle process of terrestrial ecosystems.By integrating observational data and controlled experiments and model simulations,this study demonstrates that extreme climate events not only directly affect key carbon cycle processes such as vegetation photosynthesis,respiration,and litter decomposition,but also indirectly regulate the carbon cycle by changing soil water and heat conditions,nutrient availability,and microbial activity.These effects exhibit significant spatiotemporal nonlinearity and multiple feedback and interaction mechanisms.A deep understanding of the nonlinear impact of extreme climate events on the carbon cycle is of great significance for accurately assessing the carbon source sink functions of terrestrial ecosystems in the context of global warming.
作者
王金芝
曹慧颖
Jinzhi Wang;Huiying Cao(Tianjin Binhai Vocational Institute of Automotive Engineering,Tianjin 300350;Tangshan Marine Vocational College,Tangshan,Hebei 063000)
关键词
极端气候事件
碳循环
非线性响应
生态系统功能
气候变化
extreme climate events
carbon cycle
nonlinear response
ecosystem functioning
climate change
作者简介
王金芝,硕士研究生,讲师,研究方向为化学与材料科学环境催化;通讯作者:曹慧颖,硕士研究生,讲师,研究方向为行政管理。
