数字农科院2.0

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

文献类型： 外文期刊

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

作者机构：

关键词： Stomatal conductance; Sun‐induced chlorophyll fluorescence; Transpiration; Water‐use efficiency

期刊名称： Remote Sensing

ISSN： 2072-4292

年卷期： 2021 年 13 卷 4 期

页码：

收录情况： JCR（2021版） ; EI（2021版）

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 (R2 = 0.57 for the WUE method and 0.67 for the conductance method) and daily scales (R2 = 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. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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