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Declining Contribution of Plant Physiological Effects to Global Drought Characteristics With Rising CO2 Using State-of-the-Art Earth System Models

文献类型：期刊论文

作者Li, Ziwei1; Sun, Fubao1,2; Wang, Hong1; Wang, Tingting1
刊名EARTHS FUTURE
出版日期2025-06-01
卷号13期号:6页码:e2024EF005548
关键词drought characteristics plant physiological effects vegetation impacts elevated CO2 Earth system models meteorological drought
DOI10.1029/2024EF005548
产权排序1
文献子类Article
英文摘要Vegetation physiology responses to rising atmospheric CO2 can alter the global hydrological cycle, thereby influencing drought occurrence. It has long been controversial and poorly understood how vegetation physiological effects influence meteorological drought characteristics with increasing CO2. To investigate that, we employ multiple CO2 sensitivity experiments of the state-of-the-art Earth System Models (ESMs) in the Coupled Model Intercomparison Project Phase 6 (CMIP6). We quantify drought characteristics in response to rising CO2 using two drought indices: the Standardized Precipitation Index (SPI) and the Standardized Precipitation Evapotranspiration Index (SPEI), with SPEI calculated using both the Penman-Monteith method (SPEI_PM) and energy-only method (SPEI_Rn). Our findings reveal that plant physiological effects can robustly induce more intense, frequent, and prolonged droughts under elevated CO2 levels. Spatially, drought intensity as measured by SPI, SPEI_PM, and SPEI_Rn, resulting from CO2 physiological forcing, is projected to increase over 61%, 69%, and 78% of global terrestrial areas, respectively. Notably, we found that the contribution of plant physiological effects (beta(PHY)) to drought characteristics, including intensity, frequency, and duration, exhibits a significant and spatially extensive declining trend with rising CO2 across most land areas. This declining trend is robustly depicted in both the multi-model mean and individual models. Vegetation coverage plays an important role in the spatial pattern of beta(PHY). CO2 physiological forcing therefore exerts greater impacts in the tropics, particularly over tropical forests. Our results demonstrate that drought characteristics are expected to become less dependent on plant physiological effects with increasing CO2, a consideration essential for accurate drought projections.
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WOS关键词WATER-USE EFFICIENCY ; CARBON-DIOXIDE ; ELEVATED CO2 ; CLIMATE ; LAND ; CIRCULATION ; VEGETATION ; IMPACT ; FERTILIZATION ; PRODUCTIVITY
WOS研究方向Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:001510894900001
出版者AMER GEOPHYSICAL UNION
源URL[http://ir.igsnrr.ac.cn/handle/311030/214672]  
专题陆地水循环及地表过程院重点实验室_外文论文
通讯作者Sun, Fubao
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China;
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Ziwei,Sun, Fubao,Wang, Hong,et al. Declining Contribution of Plant Physiological Effects to Global Drought Characteristics With Rising CO2 Using State-of-the-Art Earth System Models[J]. EARTHS FUTURE,2025,13(6):e2024EF005548.
APA Li, Ziwei,Sun, Fubao,Wang, Hong,&Wang, Tingting.(2025).Declining Contribution of Plant Physiological Effects to Global Drought Characteristics With Rising CO2 Using State-of-the-Art Earth System Models.EARTHS FUTURE,13(6),e2024EF005548.
MLA Li, Ziwei,et al."Declining Contribution of Plant Physiological Effects to Global Drought Characteristics With Rising CO2 Using State-of-the-Art Earth System Models".EARTHS FUTURE 13.6(2025):e2024EF005548.

入库方式： OAI收割

来源：地理科学与资源研究所

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