Global Monitoring of Volcanic SO2 Degassing Using Sentinel-5 Precursor Tropomi
De Smedt, I.
Van Roozendael, M.
Earth and related Environmental sciences
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We present here the TROPOMI SO 2 product, which is publicly available since April 2018. We describe the capabilities and limitations of the product for the monitoring of volcanic SO 2 degassing. With several examples, we illustrate the benefit of a small satellite pixel of 3.5 x 5.5 km 2 . Owing to its improved detection limit, the data can be used to generate time series of SO 2 mass over number of volcanoes, with a large range of SO 2 emissions. We use Nyiragongo as a show case and correlate the SO 2 mass data with lava lake level estimates and local measurements of the seismicity. This paper also presents on-going developments to further improve the performance of the product for weak SO 2 loadings using a new algorithm, COBRA.
CitationTheys, N.; Brenot, H.; De Smedt, I.; Lerot, C.; Hedelt, P.; Loyola, D.; Vlietinck, J.; Yu, H.; Smets, B.; Kervyn, F.; Barrière, J.; Oth, A.; D'Orcyc, N.; Van Roozendael, M. (2021). Global Monitoring of Volcanic SO2 Degassing Using Sentinel-5 Precursor Tropomi. , 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 11-16 July 2021, Brussels, Belgium, 1911-1914, DOI: 10.1109/IGARSS47720.2021.9554664.