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@ARTICLE{Weihermller:891376,
author = {Weihermüller, Lutz and Lehmann, Peter and Herbst, Michael
and Rahmati, Mehdi and Verhoef, Anne and Or, Dani and
Jacques, Diederick and Vereecken, Harry},
title = {{C}hoice of {P}edotransfer {F}unctions {M}atters when
{S}imulating {S}oil {W}ater {B}alance {F}luxes},
journal = {Journal of advances in modeling earth systems},
volume = {13},
number = {3},
issn = {1942-2466},
address = {Fort Collins, Colo.},
reportid = {FZJ-2021-01465},
pages = {e2020MS002404},
year = {2021},
abstract = {Modeling of the land surface water‐, energy‐, and
carbon balance provides insight into the behavior of the
Earth System, under current and future conditions.
Currently, there exists a substantial variability between
model outputs, for a range of model types, whereby
differences between model input parameters could be an
important reason. For large‐scale land surface,
hydrological, and crop models, soil hydraulic properties
(SHP) are required as inputs, which are estimated from
pedotransfer functions (PTFs). To analyze the functional
sensitivity of widely used PTFs, the water fluxes for
different scenarios using HYDRUS‐1D were simulated and
predictions compared. The results showed that using
different PTFs causes substantial variability in predicted
fluxes. In addition, an in‐depth analysis of the soil SHPs
and derived soil characteristics was performed to analyze
why the SHPs estimated from the different PTFs cause the
model to behave differently.The results obtained provide
guidelines for the selection of PTFs in large scale models.
The model performance in terms of numerical stability,
time‐integrated behavior of cumulative fluxes, as well as
instantaneous fluxes was evaluated, in order to compare the
suitability of the PTFs. Based on this, the Rosetta,
Wösten, and Tóth PTF seem to be the most robust PTFs for
the Mualem van Genuchten SHPs and the PTF of Cosby for the
Brooks Corey functions. Based on our findings, we strongly
recommend to harmonize the PTFs used in model
inter‐comparison studies to avoid artifacts originating
from the choice of PTF rather from different model
structures.},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {217 - Für eine nachhaltige Bio-Ökonomie – von
Ressourcen zu Produkten (POF4-217)},
pid = {G:(DE-HGF)POF4-217},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000635263700006},
doi = {10.1029/2020MS002404},
url = {https://juser.fz-juelich.de/record/891376},
}