升高的CO2和气候变化对全球森林GPP的相互抑制效应2
Yongyue Ji1, Sidong Zeng1, Xin Liu1
1Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing, 400714, China.
Environmental research
|May 16, 2024
概括
增加的二氧化碳 (CO2) 驱动森林生长,但气候因素如温度和蒸汽压力不足可以抑制这种效应. 了解这些相互作用是预测气候变化下的森林生产率的关键.
科学领域:
- 生态生态学 生态生态学
- 气候科学 气候科学
- 林业 林业 林业 林业 林业
背景情况:
- 全球森林总初级生产率 (GPP) 受二氧化碳 (CO2) 施肥的影响.
- 森林 GPP 上的 CO2 和气候因素 (温度,降水,蒸汽压力赤字,辐射) 之间的相互作用尚未得到充分理解.
研究的目的:
- 检查1982年至2018年的全球森林GPP趋势.
- 调查二氧化碳和气候因素对这些趋势的影响.
- 了解二氧化碳施肥和气候变化对森林GPP的影响之间的相互作用.
主要方法:
- 使用BEPS,NIRv,FLUXCOM和修订的EC-LUE数据集 (1982-2018) 分析全球森林GPP趋势.
- 年间GPP趋势的量化和归因于CO2和气候驱动因素.
- 评估CO2和气候因素对GPP的影响的区域差异.
主要成果:
- 升高的CO2是数据集GPP趋势的主要驱动因素 (51.11%至90.37%).
- 在NIRv和修订的EC-LUE数据集中观察到CO2对GPP的积极影响下降.
- 升高的CO2和气候变化对GPP的影响之间存在抑制关系,温度和蒸汽压力赤字分别是较低和较高度的关键限制因素.
结论:
- 全球森林的 GPP 受到 CO2升高和气候变化的重大影响.
- 在CO2受精和气候变化对GPP的影响之间存在潜在的权衡或竞争.
- 森林生态系统在应对不断变化的环境条件时表现出不同的战略资源分配.
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