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@ARTICLE{Mobilia:878328,
author = {Mobilia, Mirka and Schmidt, Marius and Longobardi, Antonia},
title = {{M}odelling {A}ctual {E}vapotranspiration {S}easonal
{V}ariability by {M}eteorological {D}ata-{B}ased {M}odels},
journal = {Hydrology},
volume = {7},
number = {3},
issn = {2306-5338},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2020-02780},
pages = {50 -},
year = {2020},
abstract = {This study aims at illustrating a methodology for
predicting monthly scale actual evapotranspiration losses
only based on meteorological data, which mimics the
evapotranspiration intra-annual dynamic. For this purpose,
micrometeorological data at the Rollesbroich and Bondone
mountain sites, which are energy-limited systems, and the
Sister site, a water-limited system, have been analyzed.
Based on an observed intra-annual transition between dry and
wet states governed by a threshold value of net radiation at
each site, an approach that couples meteorological
data-based potential evapotranspiration and actual
evapotranspiration relationships has been proposed and
validated against eddy covariance measurements, and further
compared to two well-known actual evapotranspiration
prediction models, namely the advection-aridity and the
antecedent precipitation index models. The threshold
approach improves the intra-annual actual evapotranspiration
variability prediction, particularly during the wet state
periods, and especially concerning the Sister site, where
errors are almost four times smaller compared to the basic
models. To further improve the prediction within the dry
state periods, a calibration of the Priestley-Taylor
advection coefficient was necessary. This led to an error
reduction of about $80\%$ in the case of the Sister site, of
about $30\%$ in the case of Rollesbroich, and close to
$60\%$ in the case of Bondone Mountain. For cases with a
lack of measured data of net radiation and soil heat fluxes,
which are essential for the implementation of the models, an
application derived from empirical relationships is
discussed. In addition, the study assessed whether this
variation from meteorological data worsened the prediction
performances of the models.},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000580073600001},
doi = {10.3390/hydrology7030050},
url = {https://juser.fz-juelich.de/record/878328},
}