最近西班牙森林的水循环变化更多是由树结构驱动的,而不是气候变化
Jesús Sánchez-Dávila1, Miquel De Cáceres1, Jordi Vayreda1
1CREAF, Bellaterra, E08193, Cerdanyola del Valles, Spain.
Journal of environmental management
|February 26, 2026
概括
森林层结构的变化显著影响水循环,增加蒸发 (绿色水) 和减少排水 (蓝色水). 森林管理,就像基底面积减少一样,可以提高蓝水的可用性.
科学领域:
- 森林生态 森林生态
- 水文学的水文学
- 气候变化科学 气候变化科学
背景情况:
- 森林水循环日益受到气候变化的影响,导致绿水 (蒸发) 和蓝水 (排水+排水) 动态发生变化.
- 森林扩张和因土地使用变化而增加的叶面积指数 (LAI) 进一步影响了水的可用性.
- 气候和树结构变化对森林水循环的综合影响在大规模上尚不清楚.
研究的目的:
- 为了建模西班牙森林水循环从1990-2020年,分析气候和森林结构的趋势.
- 评估不同森林类型和管理制度中绿色和蓝色水的变化.
- 了解气候变化对水循环变化的相对影响.
主要方法:
- 利用了来自三个调查 (1990-2020) 的国家森林库存数据.
- 模拟了地块层面的森林水循环,分析了气候和树结构趋势.
- 管理与未管理森林的水循环变化比较.
主要成果:
- 在研究期间观察到绿水的增加和蓝水的减少.
- 叶面积指数 (LAI) 的增长显示,对绿水增加的影响比气候变化更大.
- 最近降水量下降和结构变化显著减少了蓝水的可用性.
- 基底面积的减少暂时改善了蓝水产量,但随着时间的推移,LAI的恢复减少了这一效应.
结论:
- 森林群结构的变化,特别是LAI的增长,是水循环变化的关键驱动因素,与气候变化影响相当或超过.
- 森林管理策略,如基底面积减少,可以增强蓝水产量,特别是当大规模实施和维护时.
- 了解这些相互作用对于在不断变化的环境条件下区域水资源管理至关重要.
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