P6.3
Radiative simulation of an urban site in Marsella with the Solene model
PAPER WITHDRAWN
Dominique Groleau, Laboratoire CERMA, Nantes, France; and M. Robitu
In the frame of the ESCOMPTE/PNTS program carried in France jointly by several research teams in order to better understand the structure of the urban layer and to develop convenient climatic urban models, numerical simulation tools are used to improve the analysis of the collected data (remote detection, measures, photos) and to determine better interaction between meteorological data and urban characteristics. Ground models such as LUMPS, SM2_U or TEB evaluate the surface fluxes, with help of algorithms that combine ground parameters with aero and thermo-dynamical variables, enabling to study an entire city. The SOLENE model works at a more limited scale, that one of an urban street or a quarter, but morphology of the buildings and surface characteristics of roofs, walls and ground, and to some extent vegetation (trees) are take into account to simulate more precisely solar and thermal exchanges.
So, this SOLENE thermal-radiative model was implemented on a small quarter of Marsella (called Prefecture), for which number of interesting measures sets are available in order, firstly to evaluate the Solene model, adjusting calculations procedures if necessary, and secondly to correlate simulated surface temperatures with obtained measures and observed data during the campaign. The final objective is to be able to appreciate the impact of the urban fabric (shape, density, color, structure, inertia…) on the climatic environment and to propose realistic correlation to introduce into meso-scale models.
The object of this poster is to present succinctly the Solene model and its use in this correlation operation. Calculation procedures about solar net flux, sky view factor, wall model, radiative exchange and surface temperature determination will be briefly exposed. Some results applied to the numerical geometric model of the quarter and obtained from a collected meteorological data of the Escompte campaign will be finally discussed in the light of hypothesis or assumptions of simulations.
Poster Session 6, Urban Radiation and energy exchanges
Wednesday, 22 May 2002, 3:00 PM-3:00 PM
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