Modeling transpiration with sun-induced chlorophyll fluorescence via water use efficiency and stomatal conductance

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Authors

Huaize Feng, Tongren Xu, Jingxue Zhao, Xinlei He, Shaomin Liu

Abstract

Successfully applied in the carbon research area, sun-induced chlorophyll fluorescence (SIF) has raised the interest of researchers from the water research domain. However, the mechanism between SIF emitted by plants and transpiration (T) has not been fully explored. To improve the understanding of the relationship between SIF and T, we developed two SIF-T models, the WUE model and the conductance model, based on carbon-water coupling framework. Hourly data were used to build and validate the models we developed. Correlation analysis shows that the T modeled by our model outperforms the traditional empirical linear model with higher R2 and lower RMSE. The models we built further show the potential and mechanism in estimating water flux by SIF.

DOI

https://doi.org/10.31223/X5T017

Subjects

Earth Sciences, Hydrology

Keywords

Latent heat flux, Sun-induced chlorophyll fluorescence (SIF), Transpiration, Water-use efficiency, Stomatal conductance, Gross primary production (GPP)

Dates

Published: 2020-10-25 07:04

Last Updated: 2020-10-26 15:32

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License

CC BY Attribution 4.0 International

Additional Metadata

Data Availability (Reason not available):
refer to corresponding paper in reference

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