Title: Modeling the energy balance in Marseille: Sensitivity to roughness length parameterizations and thermal admittance
Authors: Demuzere, Matthias ×
De Ridder, Koen
Van Lipzig, Nicole #
Issue Date: 30-Aug-2008
Publisher: Amer geophysical union
Series Title: Journal of geophysical research-atmospheres vol:113 issue:D16120 pages:1-19
Abstract: During the ESCOMPTE campaign (Experience sur Site pour COntraindre les Modeles de Pollution atmospherique et de Transport d'Emissions), a 4-day intensive observation period was selected to evaluate the Advanced Regional Prediction System (ARPS), a nonhydrostatic meteorological mesoscale model that was optimized with a parameterization for thermal roughness length to better represent urban surfaces. The evaluation shows that the ARPS model is able to correctly reproduce temperature, wind speed, and direction for one urban and two rural measurements stations. Furthermore, simulated heat fluxes show good agreement compared to the observations, although simulated sensible heat fluxes were initially too low for the urban stations. In order to improve the latter, different roughness length parameterization schemes were tested, combined with various thermal admittance values. This sensitivity study showed that the Zilitinkevich scheme combined with and intermediate value of thermal admittance performs best.
ISSN: 0148-0227
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Geography & Tourism
× corresponding author
# (joint) last author

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