The first hourly volcanic SO2 column density retrieval from Geostationary Environment Monitoring Spectrometer (GEMS) of geostationary UV-Vis hyperspectral sensor and its application to volcanic studies
Abstract
This present study shows, for the first time, hourly volcanic SO2 column density variations over Asia using the Geostationary Environmental Monitoring Spectrometer (GEMS) onboard the Geostationary Korea Multi Purpose Satellite-2B (GEO-KOMPSAT-2B) satellite launched in February 2020. We were able to carry out estimations of transport path and speed, and altitude of volcanic SO2 plume emitted from Mt.Etna, Italy and Nishinoshima, Japan. Long range transported SO2 flow rates were also estimated over receptor areas such as Beijing for Mt.Etna volcanic plume and northern Philippine for that of Nishinoshima. A Similar study was conducted for SO2 emitted from Taal, Philippine. Before the eruption, Taal volcanic SO2 plumes, which were found to present within PBL, were transported mostly less than 100 km in various azimuth directions. Gradual increase in SO2 column densities was observed for about two months before a volcanic eruption from Taal. It implies that it might be possible to warn a volcanic eruption in advance which is subject to further investigation. GEMS can be further utilized for an improvement in prediction accuracy of SO2 plume transport using chemical transport model due to the availability of hourly volcanic SO2 height information.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2021
- Bibcode:
- 2021AGUFM.A15B1616P