Nitrogen dioxide over Bucharest

Measurements taken during the Aromat campaign over Bucharest, Romania show nitrogen dioxide levels over the city. The red areas indicate high concentrations and blue low concentrations. The data were acquired by the airborne AirMap instrument and the ground-based ‘MobileDOAS’ sensor. These simultaneous observations will be used to investigate the consistency between the different measuring techniques. The campaign supports the development of ESA’s Sentinel-5 Precursor mission.