Editorial Type:
Article
Article Type:
Research Article

Modeling the Surface Energy Balance of the Core of an Old Mediterranean City: Marseille

A. Lemonsu Centre National de Recherches Météorologiques, Météo-France, Toulouse, France

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C. S. B. Grimmond Atmospheric Science Program, Department of Geography, Indiana University at Bloomington, Bloomington, Indiana

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V. Masson Centre National de Recherches Météorologiques, Météo-France, Toulouse, France

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Print Publication:
01 Feb 2004
DOI:
https://doi.org/10.1175/1520-0450(2004)043<0312:MTSEBO>2.0.CO;2
Page(s):
312–327
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Abstract

The Town Energy Balance (TEB) model, which parameterizes the local-scale energy and water exchanges between urban surfaces and the atmosphere by treating the urban area as a series of urban canyons, coupled to the Interactions between Soil, Biosphere, and Atmosphere (ISBA) scheme, was run in offline mode for Marseille, France. TEB's performance is evaluated with observations of surface temperatures and surface energy balance fluxes collected during the field experiments to constrain models of atmospheric pollution and transport of emissions (ESCOMPTE)–urban boundary layer (UBL) campaign. Particular attention was directed to the influence of different surface databases, used for input parameters, on model predictions. Comparison of simulated canyon temperatures with observations resulted in improvements to TEB parameterizations by increasing the ventilation. Evaluation of the model with wall, road, and roof surface temperatures gave good results. The model succeeds in simulating a sensible heat flux larger than heat storage, as observed. A sensitivity comparison using generic dense city parameters, derived from the Coordination of Information on the Environment (CORINE) land cover database, and those from a surface database developed specifically for the Marseille city center shows the importance of correctly documenting the urban surface. Overall, the TEB scheme is shown to be fairly robust, consistent with results from previous studies.

Corresponding author address: A. Lemonsu, Météo-France, CNRM/GMME/MC2, 42 av G. Coriolis, 31057 Toulouse Cedex, France. aude.lemonsu@cnrm.meteo.fr

Abstract

The Town Energy Balance (TEB) model, which parameterizes the local-scale energy and water exchanges between urban surfaces and the atmosphere by treating the urban area as a series of urban canyons, coupled to the Interactions between Soil, Biosphere, and Atmosphere (ISBA) scheme, was run in offline mode for Marseille, France. TEB's performance is evaluated with observations of surface temperatures and surface energy balance fluxes collected during the field experiments to constrain models of atmospheric pollution and transport of emissions (ESCOMPTE)–urban boundary layer (UBL) campaign. Particular attention was directed to the influence of different surface databases, used for input parameters, on model predictions. Comparison of simulated canyon temperatures with observations resulted in improvements to TEB parameterizations by increasing the ventilation. Evaluation of the model with wall, road, and roof surface temperatures gave good results. The model succeeds in simulating a sensible heat flux larger than heat storage, as observed. A sensitivity comparison using generic dense city parameters, derived from the Coordination of Information on the Environment (CORINE) land cover database, and those from a surface database developed specifically for the Marseille city center shows the importance of correctly documenting the urban surface. Overall, the TEB scheme is shown to be fairly robust, consistent with results from previous studies.

Corresponding author address: A. Lemonsu, Météo-France, CNRM/GMME/MC2, 42 av G. Coriolis, 31057 Toulouse Cedex, France. aude.lemonsu@cnrm.meteo.fr

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