Modeling Transpiration with Sun-Induced Chlorophyll Fluorescence Observations via Carbon-Water Coupling Methods

文献类型： 外文期刊

第一作者： Feng, Huaize

作者： Feng, Huaize;Xu, Tongren;Zhao, Jingxue;Liu, Shaomin;Xu, Ziwei;He, Xinlei;Zhu, Zhongli;Chai, Linna;Liu, Liangyun;Zhou, Sha;Mao, Kebiao

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关键词： transpiration; sun-induced chlorophyll fluorescence; water-use efficiency; stomatal conductance

期刊名称：REMOTE SENSING （ 影响因子：4.848； 五年影响因子：5.353 ）

ISSN：

年卷期： 2021 年 13 卷 4 期

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收录情况： SCI

摘要： Successfully applied in the carbon research area, sun-induced chlorophyll fluorescence (SIF) has raised the interest of researchers from the water research domain. However, current works focused on the empirical relationship between SIF and plant transpiration (T), while the mechanistic linkage between them has not been fully explored. Two mechanism methods were developed to estimate T via SIF, namely the water-use efficiency (WUE) method and conductance method based on the carbon-water coupling framework. The T estimated by these two methods was compared with T partitioned from eddy covariance instrument measured evapotranspiration at four different sites. Both methods showed good performance at the hourly (R-2 = 0.57 for the WUE method and 0.67 for the conductance method) and daily scales (R-2 = 0.67 for the WUE method and 0.78 for the conductance method). The developed mechanism methods provide theoretical support and have a great potential basis for deriving ecosystem T by satellite SIF observations.

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