Article Dans Une Revue Journal of Quantitative Spectroscopy and Radiative Transfer Année : 2024

Impact of spectral coupling between urban atmosphere and sky boundary conditions in a street canyon

Résumé

Most radiative transfer models developed for the analysis of urban configurations consider a transparent urban atmosphere and gray sky conditions. The aim of the present work is to investigate these assumptions, focusing on the longwave domain. For this purpose, reference Line-by-Line Monte-Carlo calculations are first performed. A more efficient radiative transfer model based on the Finite Volume Method and SLW modeling is also developed to treat several street canyon configurations. The aspect ratio of the street canyon, a parameter frequently encountered in urban scenarios, is considered for the analysis. It is shown that, in most cases, real urban problems need to take into account a non-gray participating atmosphere within the streets, together with its spectral coupling with the non-gray sky downward radiation, to provide accurate net fluxes on urban surfaces and volumetric radiative powers in the urban atmosphere.

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Dates et versions

hal-04653014 , version 1 (25-07-2024)

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Félix Schmitt, Mathieu Galtier, Lucie Merlier, Étienne Vergnault, Frédéric André. Impact of spectral coupling between urban atmosphere and sky boundary conditions in a street canyon. Journal of Quantitative Spectroscopy and Radiative Transfer, 2024, 326, pp.109107. ⟨10.1016/j.jqsrt.2024.109107⟩. ⟨hal-04653014⟩
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