UV-Visible DOAS Research

The UV-Vis DOAS group

The DOAS group concentrates on atmospheric chemistry related research, based on observations performed using the so-called Differential Optical Absorption Spectroscopy (DOAS) technique. Retrieval algorithms applied to ground-based and satellite instruments are developed and used to monitor the atmospheric concentration of a number of important trace gases like O₃, NO₂, BrO, OClO, HCHO, SO₂, CHOCHO, etc. These activities are performed in the context of the BIRA-IASB contribution to international ground-based networks (e.g. the NDACC) and to European atmospheric chemistry satellite missions like ERS-2/GOME, SCIAMACHY and GOME-2.

The group is lead by Dr. Michel Van Roozendael. See the members of our group here

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 S5PVAL-BE campaign

For validation of the recently launched Sentinel-5 Precursor (S-5P) / TROPOMI mission, the S5PVAL-BE campaign took place from 26 to 29 June, 2019 over Antwerp and Brussels, Belgium, with a focus on mapping of the horizontal distribution of tropospheric nitrogen dioxide (NO₂). In total four mapping flights, coinciding with the S-5P overpass time, took place on four consecutive, cloud-free days with the APEX imaging spectrometer. The analysis of the gathered data will focus on the assessment of the TROPOMI tropospheric NO₂ product over polluted regions as well as on the TROPOMI sub-pixel NO₂ variability and the impact of spatial smoothing of the signal.

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