太阳辐射的差异驱动了石,太阳和阴影的叶子,碳汇的贡献转移
Jinjun Du1,2,3, Luhua Wu4,5,6,7,8,9, Heng Wei1,2,3
1School of Economics and Management, Tongren University, Tongren, 554300, China.
Carbon balance and management
|January 28, 2026
概括
全球变暖影响阳光和阴影叶的光合作用,阴影叶越来越多地导致陆地碳汇. 减少的太阳辐射推动了这些变化,影响了整个生态系统的碳吸收和全球碳中和目标.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 生态系统科学 生态系统科学
背景情况:
- 全球变暖导致太阳和阴影叶之间的光合作用反应差异.
- 我们对这些差异如何影响碳汇潜力和潜在机制的理解有限.
- 需要系统地阐明气候变化对陆地碳动态的影响.
研究的目的:
- 揭示中国南部陆地生态系统中碳沉积的时空动力学和驱动机制.
- 量化气候变化对碳汇变化的相对贡献.
- 调查阳光和阴影叶子总初级生产率 (GPP) 在碳捕获中的不同作用.
主要方法:
- 使用了三个碳汇指标:GPP,太阳叶GPP (GPPsun) 和阴影叶GPP (GPPshade).
- 应用了林德曼-梅伦达-金 (LMG) 模型来评估气候变化贡献.
- 分析了2001-2020年的数据,以确定趋势和驱动因素.
主要成果:
- GPP,GPPsun和GPPshade显示增加但波动的趋势;GPPshade在近一半的研究区域增长速度快于GPPsun.
- 阴影叶GPP对碳汇的贡献要大得多 (1.79倍),而不是阳光叶GPP,其比例稳步增加.
- 减少的太阳辐射是主要的驱动因素,显著影响了GPPshade比GPPsun更多,导致碳汇动态的重组.
结论:
- 影子叶的碳沉积潜力越来越占主导地位,这是由于太阳辐射的下降,尽管太阳叶GPP的抑制.
- 这种阴影叶子主导地位的转变重组了陆地生态系统的碳汇动态.
- 这些发现为增强陆地碳汇和推进全球碳中和目标提供了理论支持.
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