Retrieved sulfur dioxide column amounts and heights from the IASI instrument (9-30 April 2021) v1.0

This dataset contains retrievals of sulfur dioxide (SO2) from the Infrared Atmospheric Sounding Interferometer (IASI) on the MetOp platforms. This is a global dataset for 9-30th April 2021 which includes plumes from La Soufrière (St Vincent), Sabancaya (Peru) and Sangay (Ecuador). Two retrieval schemes have been used: (1) Walker et al. (2011,2012) linear retrieval which flags pixels containing SO2 and (2) Carboni et al. (2012,2016) iterative retrieval which quantifies information about the SO2 including the column amount, height and the associated errors. The retrieved outputs are provided for individual IASI orbits. This dataset was used to study the large plume of SO2 from the April 2021 eruption of La Soufrière on St Vincent in the Eastern Caribbean. The data has been produced by the Earth Observation Data Group at the University of Oxford, as part of the NERC Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics (COMET).