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

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

doi:10.3390/rs13040804

Remote Sensing (Feb 2021)

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

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

Affiliations

Huaize Feng: State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, School of Natural Resources, Beijing Normal University, Beijing 100875, China
Tongren Xu: State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, School of Natural Resources, Beijing Normal University, Beijing 100875, China
Liangyun Liu: Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
Sha Zhou: Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10027, USA
Jingxue Zhao: State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, School of Natural Resources, Beijing Normal University, Beijing 100875, China
Shaomin Liu: State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, School of Natural Resources, Beijing Normal University, Beijing 100875, China
Ziwei Xu: State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, School of Natural Resources, Beijing Normal University, Beijing 100875, China
Kebiao Mao: Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Xinlei He: State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, School of Natural Resources, Beijing Normal University, Beijing 100875, China
Zhongli Zhu: State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, School of Natural Resources, Beijing Normal University, Beijing 100875, China
Linna Chai: State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, School of Natural Resources, Beijing Normal University, Beijing 100875, China

DOI: https://doi.org/10.3390/rs13040804
Journal volume & issue: Vol. 13, no. 4
p. 804

Abstract

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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.

Published in Remote Sensing

ISSN: 2072-4292 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science
Website: http://www.mdpi.com/journal/remotesensing/

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