Synoptic analysis of a decade of daily measurements of SO 2 emission in the troposphere from volcanoes of the global ground-based Network for Observation of Volcanic and Atmospheric Change
Rattachement africain : se, pe, sg, de, cl, co, it, gb, gt, mx, fr, id, ec, us, sv, ni, République démocratique du Congo. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Volcanic plumes are common and far-reaching manifestations of volcanic activity during and between eruptions. Observations of the rate of emission and composition of volcanic plumes are essential to recognize and, in some cases, predict the state of volcanic activity. Measurements of the size and location of the plumes are important to assess the impact of the emission from sporadic or localized events to persistent or widespread processes of climatic and environmental importance. These observations provide information on volatile budgets on Earth, chemical evolution of magmas, and atmospheric circulation and dynamics. Space-based observations during the last decades have given us a global view of Earth's volcanic emission, particularly of sulfur dioxide (SO 2 ). Although none of the satellite missions were intended to be used for measurement of volcanic gas emission, specially adapted algorithms have produced time-averaged global emission budgets. These have confirmed that tropospheric plumes, produced from persistent degassing of weak sources, dominate the total emission of volcanic SO 2 . Although space-based observations have provided this global insight into some aspects of Earth's volcanism, it still has important limitations. The magnitude and short-term variability of lower-atmosphere emissions, historically less accessible from space, remain largely uncertain. Operational monitoring of volcanic plumes, at scales relevant for adequate surveillance, has been facilitated through the use of ground-based scanning differential optical absorption spectrometer (ScanDOAS) instruments since the beginning of this century, largely due to the coordinated effort of the Network for Observation of Volcanic and Atmospheric Change (NOVAC). In this study, we present a compilation of results of homogenized post-analysis of measurements of SO 2 flux and plume parameters obtained during the period March 2005 to January 2017 of 32 volcanoes in NOVAC. This inventory opens a window into the short-term emission patterns of a diverse set of volcanoes in terms of magma composition, geographical location, magnitude of emission, and style of eruptive activity. We find that passive volcanic degassing is by no means a stationary process in time and that large sub-daily variability is observed in the flux of volcanic gases, which has implications for emission budgets produced using short-term, sporadic observations. The use of a standard evaluation method allows for intercomparison between different volcanoes and between ground- and space-based measurements of the same volcanoes. The emission of several weakly degassing volcanoes, undetected by satellites, is presented for the first time. We also compare our results with those reported in the literature, providing ranges of variability in emission not accessible in the past. The open-access data repository introduced in this article will enable further exploitation of this unique dataset, with a focus on volcanological research, risk assessment, satellite-sensor validation, and improved quantification of the prevalent tropospheric component of global volcanic emission. Datasets for each volcano are made available at https://novac.chalmers.se (last access: 1 October 2020) under the CC-BY 4 license or through the DOI (digital object identifier) links provided in Table 1.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Synoptic analysis of a decade of daily measurements of SO <sub>2</sub> emission in the troposphere from volcanoes of the global ground-based Network for Observation of Volcanic and Atmospheric Change
- Date Crossref
- 22/03/2021
- Éditeur
- Copernicus GmbH
- 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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Chalmers University of Technology Department of Space pays non établi dans la noticeUniversité ou école supérieure
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Instituto Geológico Minero y Metalúrgico pays non établi dans la noticeOrganisme public
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Nanyang Technological University Earth Observatory of Singapore (EOS) pays non établi dans la noticeUniversité ou école supérieure
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Earth Observatory of Singapore pays non établi dans la noticeStructure de recherche
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Heidelberg University Institute of Environmental Physics pays non établi dans la noticeUniversité ou école supérieure
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Servicio Nacional de Geologia y Mineria pays non établi dans la noticeOrganisme public
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Colombian Geological Survey pays non établi dans la noticeOrganisme public
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Istituto Nazionale di Geofisica e Vulcanologia pays non établi dans la noticeStructure de recherche
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University of Manchester now at: Department of Earth and Environmental Sciences pays non établi dans la noticeUniversité ou école supérieure
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National Institute for Seismology pays non établi dans la noticeInstitution
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Universidad Nacional Autónoma de México pays non établi dans la noticeUniversité ou école supérieure
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Institut de physique du globe de Paris pays non établi dans la noticeStructure de recherche
Department of Space — Chalmers University of Technology, Instituto Geológico Minero y Metalúrgico et Earth Observatory of Singapore (EOS) — Nanyang Technological University, avec 9 autres affiliations. Pays d’affiliation : République démocratique du Congo.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.