Version 2 of the global catalogue of large anthropogenic and volcanic SO₂ sources and emissions derived from satellite measurements

Abstract. Sulfur dioxide (SO2) measurements from the Ozone Monitoring Instrument (OMI), Mapping and Profiler Suite (OMPS), TROPOspheric (TROPOMI) satellite spectrometers were used to update extend previously developed global catalogue of large SO2 emission sources. This version 2 covers period 2005–2021 includes a total 759 continuously emitting point sources releasing about 10 kt yr−1 more than 4000 SO2, that have been identified grouped by country primary source origin: volcanoes (106 sources); power plants (477); smelters (74); related oil gas industry (102). There are several major improvements compared original catalogue: it combines emissions estimates three instruments instead just OMI, uses new OMI OMPS dataset, updated consistent site-specific air mass factors (AMFs) calculate vertical column densities (VCDs). The newest TROPOMI data processed with Covariance-Based Retrieval Algorithm (COBRA), in catalogue, can detect as low 8 (in 2018–2021) 30 limit for OMI. In general, there is an overall agreement within ±12 % estimated regions. For individual sources, spread larger: annual agree ±13 50 cases ±28 90 cases. calculated weighted average using inverse-variance weighting method. OMPS, contribute 7 %, 5 88 average, respectively, small (<30 yr−1) 33 20 47 (>300 show approximate decline between 2005 2021, although relatively stable during last 3 years. has posted at NASA monitoring website (https://doi.org/10.5067/MEASURES/SO2/DATA406, Fioletov et al., 2022).