Influence of WRF Parameterization on Coupled Air Quality Modeling Systems

Abstract

This study presents the continuation and exploration of the research by application of regional and high resolution air quality (AQ) models. Separate ‘offline’ (WRF—CAMx) and ‘online’ (WRF Chem) coupling modeling systems were used to evaluate the contribution of the local anthropogenic sources over the Republic of Croatia. Within the research with the NWP WRF model, various tests were made with the implementation of the new, improved mixing length scale in MYJ PBL scheme. Default and modified setup of the NWP WRF model was tested on different ABL stability conditions and coupled with AQ models. Experiments with different AQ models also encompassed different time periods with relatively high concentrations in rural and urban areas. Using complex atmospheric chemistry models it was possible to analyze the main processes contributing to the relatively high concentration on regional and local scale and to compare the performance of two different coupling modeling systems.