Comparison of Satellite, Model and Ground-Based Tropospheric NO2 Data within QUITSAT Project

The target of the QUITSAT pilot project, is to integrate satellite, ground-based (in-situ and remote sensing) measurements and model output in order to develop algorithms and procedures for evaluation and prediction of the air quality in Lombardia and Emilia-Romagna (Italy) regions. Presented work describes two dedicated approaches for comparison of tropospheric NO 2 vertical column in 0 ÷ 2 km layer. Some examples of ground-based DOAS (Differential Optical Absorption Spectroscopy), OMI measurements and Transport Chemical Aerosol Model (TCAM) data are presented and discussed. The obtained results are encouraging and demonstrate feasibility to provide regular information for Air Quality (AQ) assessment in target areas.