Submitted as: model evaluation paper 22 Sep 2020
Submitted as: model evaluation paper | 22 Sep 2020
Modeling of land-surface interactions in the PALM model system 6.0: Land surface model description, first evaluation, and sensitivity to model parameters
- 1Leibniz University Hannover, Institute of Meteorology and Climatology, Hannover, Germany
- 2University of Bergen, Geophysical Institute, Bergen, Norway
- 1Leibniz University Hannover, Institute of Meteorology and Climatology, Hannover, Germany
- 2University of Bergen, Geophysical Institute, Bergen, Norway
Abstract. In this paper the land-surface model embedded in the PALM model system is described and evaluated against in-situ measurement data in Cabauw. For this, two consecutive clear-sky days are simulated and the components of surface energy balance, as well as near-surface potential temperature, humidity and horizontal wind speed are compared against observation data. For the simulated period, components of the energy balance agree well during day- and nighttime, and also the daytime Bowen ratio agrees fairly well compared to the observations. Although the model simulates a significantly more stably-stratified nocturnal boundary layer compared to the observation, near-surface potential temperature and humidity agree fairly well during day. Moreover, we performed a sensitivity study in order to investigate how much the model results depend on land-surface and soil specifications, as well as atmospheric initial conditions. By this, we find that a false estimation of the leaf area index, the albedo, or the initial humidity causes a serious misrepresentation of the daytime turbulent sensible and latent heat fluxes. During night, the boundary-layer characteristics are mostly affected by grid size, surface roughness, and the applied radiation schemes.
Katrin Frieda Gehrke et al.


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RC1: 'review-gmd-2020-197', Anonymous Referee #1, 09 Nov 2020
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RC2: 'Review of Gehrke, et al.', Anonymous Referee #2, 03 Dec 2020
Katrin Frieda Gehrke et al.
Data sets
Modeling of land-surface interactions in the PALM model system 6.0: Land surface model description, first evaluation, and sensitivity to model parameters Katrin Frieda Gehrke, Matthias Sühring, and Björn Maronga https://doi.org/10.25835/0005529
Model code and software
Modeling of land-surface interactions in the PALM model system 6.0: Land surface model description, first evaluation, and sensitivity to model parameters Katrin Frieda Gehrke, Matthias Sühring, and Björn Maronga https://doi.org/10.25835/0005529
Katrin Frieda Gehrke et al.
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