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@ARTICLE{DeCannire:903179,
author = {De Cannière, S. and Herbst, Michael and Vereecken, H. and
Defourny, P. and Jonard, F.},
title = {{C}onstraining water limitation of photosynthesis in a crop
growth model with sun-induced chlorophyll fluorescence},
journal = {Remote sensing of environment},
volume = {267},
issn = {0034-4257},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2021-04899},
pages = {112722 -},
year = {2021},
abstract = {Water fulfils key roles in maintaining a plant's biological
activity. Water shortage induces stomatal closure, causing a
reduction in photosynthesis and transpiration rates.
Sun-induced chlorophyll fluorescence (SIF) emission is
sensitive to subtle, stress-induced variations in
non-photochemical quenching and in photosynthetic electron
transport, caused by e.g., a fluctuation in the water
availability. Based on this sensitivity, a framework for
calibrating a water stress function in a crop growth model
using ground-based SIF observations is proposed. SIF time
series are simulated by coupling the AgroC crop growth model
to the Soil Canopy Observations Photosynthesis Energy
(SCOPE) model. This allowed parametrizing the water stress
function in the AgroC crop growth model, resulting in
improved estimates of actual evapotranspiration and net
ecosystem exchange over a sugar beet stand during stressed
periods. The improvement in the estimation of the water and
carbon fluxes by AgroC during the summer months highlights
the ability of canopyscale SIF observations to serve as a
remote sensing metric to indicate the intensity of a stress
condition. We argue that our framework, linking SIF emission
to stress functions, can be used to extract information
concerning drought stress from the Fluorescence Explorer
(FLEX) satellite, scheduled for launch in 2024.},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {2173 - Agro-biogeosystems: controls, feedbacks and impact
(POF4-217)},
pid = {G:(DE-HGF)POF4-2173},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000708537500003},
doi = {10.1016/j.rse.2021.112722},
url = {https://juser.fz-juelich.de/record/903179},
}