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Diverse responses of canopy conductance to heatwaves

文献类型：期刊论文

作者Wang, Longhao3; Zhang, Yongqiang; Ma, Ning; Song, Peilin1; Tian, Jing; Zhang, Xuanze; Xu, Zhenwu3
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2023-05-15
卷号335页码:109453
关键词Climate change Heatwave Vegetation canopy Ecosystem resilience Canopy conductance
ISSN号0168-1923
DOI10.1016/j.agrformet.2023.109453
文献子类Article
英文摘要Heatwaves have increased significantly in recent decades, seriously affecting the biosphere. The vegetation canopy is altered by heatwaves through high temperatures and water deficit, adversely affecting the ecosystem's health. However, how the canopy resilience of different ecosystems responding to heatwaves behaves remains less understood. Canopy conductance (Gc) couples the carbon and water cycles and is often used as a proxy for vegetation activity. Here we used eddy-covariance (EC) flux observations and a diagnostic evapotranspiration model to deduce daily canopy conductance inversely. Total 16 flux sites from 2003 to 2014 were used to explore the changes in canopy conductance during heatwaves across multiple ecosystems. Our results showed that the frequency of heatwaves increased significantly in almost all EC sites, and the average heatwave trend was 0.4 d yr-1 (p < 0.05). Wetlands had the best resilience to heatwaves, as indicated by the Gc decreasing by 4.6% during heatwaves. For forest ecosystems, the Gc of evergreen broadleaf forests decreased by 29.3% during heatwaves, meaning they showed the best resilience to drought. This is followed by the deciduous broadleaf forests and evergreen needleleaf forests, whose Gc decreased by 50.7% and 46.3%, respectively. The above re-sults suggest that the resilience of different ecosystems appears diverse during heatwaves. The wetter the ecosystem, the more resistant it is to heatwaves. This study highlights the distinct responses of ecosystems to heatwaves, facilitating our understanding of the influences heatwaves have on terrestrial ecosystems.
学科主题Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS关键词TERRESTRIAL CARBON-CYCLE ; CLIMATE EXTREMES ; HEAT WAVES ; ECOSYSTEM PRODUCTIVITY ; TREE MORTALITY ; DROUGHT ; EVAPOTRANSPIRATION ; IMPACTS ; WATER ; SENSITIVITY
语种英语
出版者ELSEVIER
源URL[http://ir.igsnrr.ac.cn/handle/311030/193428]  
专题陆地水循环及地表过程院重点实验室_外文论文
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Xi An Jiao Tong Univ, Sch Elect Sci & Engn, Xian 710049, Peoples R China
3.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		 Wang, Longhao,Zhang, Yongqiang,Ma, Ning,et al. Diverse responses of canopy conductance to heatwaves[J]. AGRICULTURAL AND FOREST METEOROLOGY,2023,335:109453.
APA Wang, Longhao.,Zhang, Yongqiang.,Ma, Ning.,Song, Peilin.,Tian, Jing.,...&Xu, Zhenwu.(2023).Diverse responses of canopy conductance to heatwaves.AGRICULTURAL AND FOREST METEOROLOGY,335,109453.
MLA Wang, Longhao,et al."Diverse responses of canopy conductance to heatwaves".AGRICULTURAL AND FOREST METEOROLOGY 335(2023):109453.

入库方式： OAI收割

来源：地理科学与资源研究所

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