剖析中国潜在植被水利用效率的特征和驱动因素
Rui Kong1, Bin Zhu2, Zengxin Zhang3
1State Key Laboratory of Hydrology-Water Resources and Hydraulics Engineering, College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China; Institute of Water Sciences, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China.
The Science of the total environment
|September 11, 2024
概括
中国的植被恢复提高了用水效率 (WUE),正常化差异植被指数 (NDVI) 是一个关键驱动因素. 诸如降水 (PRE) 和蒸汽压力赤字 (VPD) 等区域气候因素也在不同区域显著影响WUE.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 气候变化研究 气候变化研究
背景情况:
- 中国大规模的植被绿化影响了全球植被动态.
- 这种恢复对用水效率 (WUE) 的具体影响尚未完全理解.
研究的目的:
- 调查1982年至2019年中国潜在植被WUE的驱动因素.
- 量化植被恢复和气候因素对WUE变化的贡献.
主要方法:
- 使用了隆德-波茨坦-耶纳 (LPJ) 全球动态植被模型.
- 使用地质探测器和结构方程建模 (SEM) 来分析驱动因素.
- 评估了中国各地潜在的植被恢复和WUE增强.
主要成果:
- 正常化差异植被指数 (NDVI) 解释了超过40%的潜在植被 WUE 变化,超过了气候因素.
- 干旱/半干旱地区的降雨量 (PRE),NDVI和蒸汽压力不足 (VPD) 显著;温度 (TEM) 主导湿地区.
- NDVI对WUE产生了最强的直接积极影响; VPD和PRE对WUE产生了最强的直接积极影响; VPD和PRE对WUE产生了最强的直接积极影响.
结论:
- 植被恢复通常会增强潜在的WUE,但区域差异是由PRE,TEM和VPD塑造的.
- 植被恢复和WUE增强的巨大潜力存在,特别是在洛斯高原,内蒙古高原和新疆北部.
- 了解这些复杂的相互作用对于优化生态恢复策略和水资源管理至关重要.
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