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Detecting the interactions between vegetation greenness and drought globally

文献类型：期刊论文

作者Li, Ziwei1,2; Sun, Fubao1,2; Wang, Hong2; Wang, Tingting2; Feng, Yao2
刊名ATMOSPHERIC RESEARCH
出版日期2024-07-01
卷号304页码:107409
关键词Drought Drought index Vegetation greenness LAI Interaction Granger causality
DOI10.1016/j.atmosres.2024.107409
产权排序1
文献子类Article
英文摘要Drought changes can profoundly influence vegetation growth while vegetation, in turn, may impact drought by modulating water and energy exchanges between the land and atmosphere. Previous studies have primarily focused on the unidirectional effects of drought on vegetation dynamics. However, the impacts of vegetation on drought and their bidirectional dependencies have remained underexplored. In this study, we employ the Leaf Area Index (LAI) and two drought indices (the Standardized Precipitation Index, SPI, and, the Standardized Precipitation Evapotranspiration Index, SPEI) to investigate the interaction between vegetation greenness and drought globally over the period 2001 to 2020. The results demonstrate a statistically significant and consistent trend between LAI and SPI (SPEI) in 66.9% (54.01%) of global vegetated lands. SPI commonly displays a 2month delayed response to LAI, whereas SPEI shows no evident lag, implying a more rapid response of SPEI to LAI compared to SPI. A substantial proportion of global vegetated areas, around 66% for LAI-SPI and 52% for LAI-SPEI, exhibit a significant positive relationship. The Granger causality test reveals a bidirectional causal relationship between vegetation greenness and drought across approximately 20% of global vegetated areas. Vegetation greenness is identified as the Granger cause of SPI (SPEI) in >60% (30%) of global vegetated lands, providing statistical observational evidence indicating that vegetation can influence drought in many regions within terrestrial ecosystems. Interestingly, the ratio of areas where LAI serves as the Granger cause of SPI is more extensive than the corresponding ratio where SPI is identified as the Granger cause of LAI, a pattern opposite to that observed with SPEI. Overall, our investigation into the interactions between vegetation greenness and drought holds significance for enhancing our understanding of land -atmosphere interplays in the context of climate change and contributes to advancing sustainable development for ecosystem services.
WOS关键词CLIMATE-CHANGE ; ELEVATED CO2 ; PLANT-RESPONSES ; PHOTOSYNTHESIS ; SENSITIVITY ; SEVERITY ; IMPACTS ; FORESTS ; HEAT
WOS研究方向Meteorology & Atmospheric Sciences
WOS记录号WOS:001231890700001
出版者ELSEVIER SCIENCE INC
源URL[http://ir.igsnrr.ac.cn/handle/311030/205298]  
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Li, Ziwei
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Li, Ziwei,Sun, Fubao,Wang, Hong,et al. Detecting the interactions between vegetation greenness and drought globally[J]. ATMOSPHERIC RESEARCH,2024,304:107409.
APA Li, Ziwei,Sun, Fubao,Wang, Hong,Wang, Tingting,&Feng, Yao.(2024).Detecting the interactions between vegetation greenness and drought globally.ATMOSPHERIC RESEARCH,304,107409.
MLA Li, Ziwei,et al."Detecting the interactions between vegetation greenness and drought globally".ATMOSPHERIC RESEARCH 304(2024):107409.

入库方式： OAI收割

来源：地理科学与资源研究所

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