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SOLWEIG - The new model for calculating the mean radiant temperature

Conference contribution
Authors Fredrik Lindberg
Sofia Thorsson
Published in The Seventh International Conference on Urban Climate
Publication year 2009
Published at Department of Earth Sciences
Language en
Keywords Tmrt, Digital Elevation Models (DEM), vegetation, Graphical User Interface (GUI)
Subject categories Climate Research


The new radiation model, SOLWEIG (SOlar and LongWave Environmental Irradiance Geometry-model), which simulates three-dimensional daytime short-wave and long-wave radiation fluxes as well as mean radiant temperature (Tmrt) in complex urban settings is presented in this paper. It is a grid based, non-stationary model that is able to compute spatial variations of radiation fluxes and Tmrt on very large model domains and on various temporal scales. The first version of the SOLWEIG model (1.0) uses built structures for representing urban geometry. In the second version (2.0) a vegetation scheme that is able to account for the radiative properties of trees and bushes which affects the outcome of the radiation fluxes and hence Tmrt will be included. Work on setting up a user-friendly interface for model runs is also demonstrated.

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