A global catalogue of large SO 2 sources and emissions derived from theOzone Monitoring Instrument

摘要: Abstract. Sulfur dioxide (SO2) measurements from the Ozone Monitoring Instrument (OMI) satellite sensor processed with new principal component analysis (PCA) algorithm were used to detect large point emission sources or clusters of sources. The total 491 continuously emitting releasing about 30 kt yr−1 more than 4000 kt yr−1 SO2 per year have been identified and grouped by country primary source origin: volcanoes (76 sources); power plants (297); smelters (53); related oil gas industry (65). using different methods, including through OMI themselves applied a detection algorithm, their evolution during 2005–2014 period was traced estimating annual emissions each source. For volcanic sources, study focused on continuous degassing, explosive eruptions excluded. Emissions degassing measured, many for first time, collectively they account 30 % estimated measurements, but that fraction has increased in recent years given cumulative global are declining while remained nearly constant. Anthropogenic USA declined 80 % over as did western central Europe, whereas India doubled, other SO2-emitting regions (South Africa, Russia, Mexico, Middle East) fairly In total, OMI-based estimates half reported anthropogenic emissions; remaining is likely less not detected OMI.