model which will be used as basis for the CAFE baseline
scenario and for the integrated assessment modelling is designed to
work on 50 * 50 km grid. Although this scale is considered to be
adequate for regional scale pollution, it does not give appropriate
answers to local problems, mainly in urban areas. It will be
necessary to better understand the links between the regional and
the local (urban) situation of air quality.
In order to address this problem, Joint
Research Centre, EMEP, EUROTRAC and IIASA
launched a research exercise on modelling and urban scale, called
Delta" in association with eight volunteer cities.
The RAINS model has been extended to also assess air pollution
in the urban background through the CITY DELTA II project led by
IIASA. The final report of
the CITY DELTA II project gives the details on how the methodology
of parameterisation of air pollution in the urban background has
Other urban scale projects are currently developed and could be
used in the framework of the CAFE programme, such as INTEGAIRE
launched by EUROCITIES.