Computation and analysis of Sobol coefficients for air pollution concentrations over the territory of Bulgaria

One of the main tools for modeling air pollutions over the territory of Bulgaria is the US EPA Models-3 system. The main components of the system are MM5/WRF meteorological preprocessor, SMOKE emission preprocessor and CMAQ chemical transport model. TNO emission inventory is used as emission input. The Models-3 “Integrated Process Rate Analysis” option is applied to discriminate the role of different dynamic and chemical processes for the pollution for all SNAP categories. In this work we evaluate the influence of the different input parameters as concentration in different SNAP categories under constant meteorological conditions to the output concentrations over Bulgaria following methodology of Sobol-Saltelli. In order to obtain reliable estimates of the Sobol coefficients we perform a large of MPI jobs using the clusters in South-Eastern region. Using these coefficients we assess the relative importance of the various input parameters, and their interactions.