The importance of meteorological scales to forecast air pollution scenarios on coastal complex terrain

[摘要] Some of the meteorological approaches commonly considered in urban airpollution models do not take into account the importance of the smallerscales in the meteorology of complex-terrain coastal sites. The aim of thiswork is to estimate the impact of using the proper meteorological scaleswhen simulating the behaviour of the pollutant concentrations emitted in thelower layers over coastal complex terrain areas. The availability ofexperimental measurements of a power plant plume near the Castellónconurbation (on the Spanish Mediterranean coast) has allowed us to use thisplume as a tracer of opportunity of the lower atmosphere to check theresults of a simulation exercise using the RAMS mesoscale model coupled tothe HYPACT particle model. The results obtained show that in acomplex-terrain coastal site, because of the strong effect of themeteorological interactions between the different scales on the integraladvection and the turbulent dispersion of pollutants, using an inadequatescale to solve the meteorology can result in a very big gap in thesimulation of lower-layer pollutant behaviour at urban scales.

[学科分类] 大气科学