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1.3.4.3 Urban Parameterization and Experimental Setup
Cities affect the boundary layer properties thus having direct influence on the
meteorological conditions and therefore on the climate. The urban surface is covered
by large number of artificial object with complex 3 dimensional structure and considerable vertical size. Specific characteristics in urban morphology can be involved
in complicated physical processes such as increased momentum drag, radiation
trapping between buildings (effect of vertical surfaces), and heat conduction by the
artificial surfaces. There had been many field measurements in cities that found
characteristic features of mean flow, turbulence and thermal structures in the urban
boundary layer (e.g. Allwine et al. 2002; Rotach et al. 2005).
Fig. 1.11 The validation of model mean temperature in terms of the difference of the ERA-Interim
driven simulation against E-OBS data, for temperature and individual seasons
J. Fallmann et al.
1.3.4.3 Urban Parameterization and Experimental Setup
Cities affect the boundary layer properties thus having direct influence on the
meteorological conditions and therefore on the climate. The urban surface is covered
by large number of artificial object with complex 3 dimensional structure and considerable vertical size. Specific characteristics in urban morphology can be involved
in complicated physical processes such as increased momentum drag, radiation
trapping between buildings (effect of vertical surfaces), and heat conduction by the
artificial surfaces. There had been many field measurements in cities that found
characteristic features of mean flow, turbulence and thermal structures in the urban
boundary layer (e.g. Allwine et al. 2002; Rotach et al. 2005).
Fig. 1.11 The validation of model mean temperature in terms of the difference of the ERA-Interim
driven simulation against E-OBS data, for temperature and individual seasons
J. Fallmann et al.