Temporal Variability in Gas Emissions at Bagana Volcano Revealed by Aerial, Ground, and Satellite Observations
Rattachement africain : gb, nz, pg, us, it. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Abstract Bagana is a remote, highly active volcano, located on Bougainville Island in southeastern Papua New Guinea. The volcano has exhibited sustained and prodigious sulfur dioxide gas emissions in recent decades, accompanied by frequent episodes of lava extrusion. The remote location of Bagana and its persistent activity have made it a valuable case study for satellite observations of active volcanism. This remoteness has also left many features of Bagana relatively unexplored. Here, we present the first measurements of volcanic gas composition, achieved by unoccupied aerial system (UAS) flights through the volcano's summit plume, and a payload comprising a miniaturized MultiGAS. We combine our measurements of the molar CO2/SO2 ratio in the plume with coincident remote sensing measurements (ground‐ and satellite‐based) of SO2 emission rate to compute the first estimate of CO2 flux at Bagana. We report low SO2 and CO2 fluxes at Bagana from our fieldwork in September 2019, ∼320 ± 76 td−1 and ∼320 ± 84 td−1, respectively, which we attribute to the volcano's low level of activity at the time of our visit. We use satellite observations to demonstrate that Bagana's activity and emissions behavior are highly variable and advance the argument that such variability is likely an inherent feature of many volcanoes worldwide and yet is inadequately captured by our extant volcanic gas inventories, which are often biased to sporadic measurements. We argue that there is great value in the use of UAS combined with MultiGAS‐type instruments for remote monitoring of gas emissions from other inaccessible volcanoes.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Temporal Variability in Gas Emissions at Bagana Volcano Revealed by Aerial, Ground, and Satellite Observations
- Date Crossref
- 01/06/2023
- Éditeur
- American Geophysical Union (AGU)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of Manchester Centre for Crisis Studies and Mitigation pays non établi dans la noticeUniversité ou école supérieure
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University College London Department of Earth Sciences pays non établi dans la noticeUniversité ou école supérieure
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University of Sheffield Department of Geography pays non établi dans la noticeUniversité ou école supérieure
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Victoria University of Wellington Department of Earth Sciences pays non établi dans la noticeUniversité ou école supérieure
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Papua New Guinea University of Natural Resources and Environment pays non établi dans la noticeUniversité ou école supérieure
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University of Bristol Department of Aerospace Engineering pays non établi dans la noticeUniversité ou école supérieure
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United States Geological Survey pays non établi dans la noticeOrganisme public
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University of Turin pays non établi dans la noticeUniversité ou école supérieure
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University of Palermo pays non établi dans la noticeUniversité ou école supérieure
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Istituto Nazionale di Geofisica e Vulcanologia pays non établi dans la noticeStructure de recherche
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Rabaul Volcanological Observatory Rabaul Papua New Guinea pays non établi dans la noticeInstitution
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U.S. Geological Survey (contractor) New Plymouth New Zealand pays non établi dans la noticeInstitution
Centre for Crisis Studies and Mitigation — University of Manchester, Department of Earth Sciences — University College London et Department of Geography — University of Sheffield, avec 9 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.