植被覆盖的变化作为全球叶面积指数动态的日益增长的驱动因素
Dashan Wang1,2,3, Alan D Ziegler4, Joseph Holden5
1State Key Laboratory of Soil Pollution Control and Safety, Southern University of Science and Technology, Shenzhen, China.
Nature communications
|October 20, 2025
概括
植被覆盖面的变化对全球叶面积指数 (LAI) 的趋势产生了重大影响,自20世纪80年代以来,LAI增加了18.1%. 北半球的森林再生推动了这一点,而南半球的森林砍伐部分抵消了这一点.
科学领域:
- 地球系统科学 地球系统科学
- 全球生态学全球生态学
- 气候变化研究 气候变化研究
背景情况:
- 全球叶面积指数 (LAI) 在过去的四十年中一直在增加,这表明碳捕获的增强和气候减缓的潜力.
- 讨论了植被覆盖变化 (再造林和砍伐森林) 在推动 LAI 动态和生态系统与气候相互作用方面的确切作用.
研究的目的:
- 开发一个数据驱动的框架来量化植被覆盖变化对LAI动态的贡献.
- 评估植被覆盖变化对观察到的LAI趋势的空间和时间贡献.
主要方法:
- 利用数据驱动的框架整合了基于卫星的观测.
- 量化了植被覆盖变化对全球土地面积的LAI动态的影响.
- 自20世纪80年代以来,分析了森林再生和森林砍伐对LAI趋势的贡献.
主要成果:
- 植被覆盖的变化占自20世纪80年代以来观察到的全球LAI增加的18.1%±5.9%.
- 北半球增加的树木覆盖有显著的贡献 (33.8%±3.6%),部分抵消了南半球森林砍伐 (-15.7%±3.1%).
- 森林再生的影响在中国和欧洲最为明显;然而,森林砍伐对热带地区的LAI的负面影响更为敏感.
结论:
- 植被覆盖的变化是全球LAI动态的一个重要驱动因素,其影响力越来越大.
- 这些发现对预测未来的LAI轨迹和为气候缓解政策提供信息有重大影响.
- 对生态系统与气候相互作用的准确建模需要更好地整合植被覆盖的变化影响.
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