Recent Water Constraints Mediate the Dominance of Climate and Atmospheric CO2 on Vegetation Growth Across China
文献类型: 外文期刊
作者: Song, Yang;Penuelas, Josep;Ciais, Philippe;Wang, Songhan;Zhang, Yao;Gentine, Pierre;McCabe, Matthew F.;Wang, Lixin;Li, Xing;Li, Fei;Wang, Xiaoping;Jin, Zhenong;Wu, Chaoyang;Jin, Xiuliang
作者机构:
关键词: water availability;vegetation growth;climate change;carbon dioxide fertilization effect;greening trend;drought
期刊名称: EARTHS FUTURE
ISSN:
年卷期: 2024 年 12 卷 6 期
页码:
收录情况: SCIE(2024版)
摘要: China's vegetation growth has shown a broad increase under climate change and human activities over the past few decades. At the same time, changes in vegetation water demand, terrestrial water availability, and climatic factors are expected to lead to increasing water constraints on vegetation growth. However, whether water constraints have influenced climate change-driven vegetation greening trends remains unclear. In this study, we provide a comprehensive assessment of recent water constraints and their implications for vegetation growth in China between 1982 and 2015. To do this, we analyze the spatiotemporal patterns of the relationship between vegetation growth and water availability to reveal recent water constraints hidden within China's vegetation greening. Further analysis shows that climate and atmospheric CO2 have exerted varying levels of importance in regulating vegetation growth across different water constraints. With increasing water constraints, more regions become climate-dominated and fewer become CO2-dominated. Overall, our findings highlight that water constraints can mediate the dominance of climate and atmospheric CO2 on vegetation growth. This will help decision-makers recognize the uncertainty of sustainable vegetation greening trends.
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