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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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HESS | Articles | Volume 23, issue 1
Hydrol. Earth Syst. Sci., 23, 515–535, 2019
https://doi.org/10.5194/hess-23-515-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: Linking landscape organisation and hydrological functioning:...

Hydrol. Earth Syst. Sci., 23, 515–535, 2019
https://doi.org/10.5194/hess-23-515-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 28 Jan 2019

Research article | 28 Jan 2019

Using phase lags to evaluate model biases in simulating the diurnal cycle of evapotranspiration: a case study in Luxembourg

Maik Renner et al.

Data sets

Surface energy balance observations at a grassland site in Luxembourg H.-D. Wizemann, I. Trebs, and V. Wulfmeyer https://doi.org/10.5880/fidgeo.2018.024

Surface energy balance at a grassland site in Luxembourg modelled by three structurally different evapotranspiration schemes. M. Renner, H.-D. Wizemann, C. Brenner, K. Mallick, I. Trebs, V. Wulfmeyer, K. Schulz, and A. Kleidon https://doi.org/10.5880/fidgeo.2018.019

Model code and software

Phaselag: R package to compute the phase lag between two variables M. Renner https://doi.org/10.5281/zenodo.2540534

R script to reproduce phase lag analysis of the diurnal cycle of evapotranspiration M. Renner https://doi.org/10.5281/zenodo.2540690

ClaireBrenner/pyTSEB_Renner_et_al2018: OSEB/TSEB code for Renner et al. 2019 C. Brenner https://doi.org/10.5281/zenodo.2541157

R: A Language and Environment for Statistical Computing R Core Team https://www.R-project.org/

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Short summary
We estimate the phase lag of surface states and heat fluxes to incoming solar radiation at the sub-daily timescale. While evapotranspiration reveals a minor phase lag, the vapor pressure deficit used as input by Penman–Monteith approaches shows a large phase lag. The surface-to-air temperature gradient used by energy balance residual approaches shows a small phase shift in agreement with the sensible heat flux and thus explains the better correlation of these models at the sub-daily timescale.
We estimate the phase lag of surface states and heat fluxes to incoming solar radiation at the...
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