eTheses Repository - University of Birmingham

Table 6.4: Summary of simulations which form the DENSITY series of model runs
Series name
DENSITY SERIES
6.1.5 Model configuration for the scenarios
Simulation
name Description Density factor
urban90% 0.9
urban80% For all grid cells the urban land 0.8
urban70% cover fraction is reduced by 0.7
urban60% multiplying it with the density 0.6
urban50% factor (see column to the right for 0.5
urban40% the density factor for each run). 0.4
urban30%
0.3
In order to better isolate the effects of the land cover change all model runs were performed
with the same model configuration, initial conditions and boundary conditions. As
discussed all urban characteristics such as building heights, street widths, surface albedo
and emissivity were kept constant. The meteorological conditions used for the series of
runs were those for a case study (6 th -7 th August 1998) for which the combined
METRAS+BEP model performance was evaluated in Chapter 5. These were summertime
anti-cyclonic conditions and part of an extended period of strong UHI conditions, clear
skies and low winds.
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