Passive UV remote sensing of volcanic sulphur and halogen emissions (Ph.D. Project)
Jonas will present his PhD work which was conducted at the Norwegian Institute for Air Research (NILU). In his PhD, he concentrates on optical remote sensing measurements of volcanic gas emissions. The used measurement techniques are based on the absorption of ultraviolet solar radiation due to gases in the emission plumes. The focus is on measurements of sulphur dioxide (SO2) and reactive halogen species such as bromine or chlorine oxides (e.g. BrO, OClO). Furthermore, a considerable part of his work is related to improvements in the required data analysis, for instance, measuring velocity fields in the emission plumes based on imagery data using motion estimation (optical flow) algorithms. The latter is of central relevance for the quantification of total emission-fluxes of the emitted gases.