2011-12-15: Phd defense of Tim Vlemmix
The thesis describes a method to measure columns and simplified profiles of tropospheric nitrogen dioxide (NO2) with a MAX-DOAS instrument (see photo). The MAX-DOAS instrument was placed on the roof of the KNMI building for 14 months, which yielded a unique set of observations. The data were compared with the NO2-lidar from the RIVM, satellite observations from the OMI-instrument and the air-quality model Lotos-Euros. The comparisons showed that MAX-DOAS measurements are very suitable for validation purposes. The observations can be done automatically, and because of the low costs this type of instrument is very suitable for a (European) network.