View in EDS HTML Full Text PDF Full Text

Quantification of volcanic degassing and analysis of uncertainties using numerical modeling: the case of Stephanos crater (Nisyros Island, Greece).

Saved in:
Bibliographic Details
Title: Quantification of volcanic degassing and analysis of uncertainties using numerical modeling: the case of Stephanos crater (Nisyros Island, Greece).
Authors: Massaro, Silvia1,2 (AUTHOR) silvia.massaro@uniba.it, Tamburello, Giancarlo2 (AUTHOR), Bini, Giulio2 (AUTHOR), Costa, Antonio2 (AUTHOR), Stocchi, Manuel1 (AUTHOR), Tassi, Franco3,4 (AUTHOR), Biagi, Rebecca3 (AUTHOR), Vaselli, Orlando3,4 (AUTHOR), Chiodini, Giovanni2 (AUTHOR), Dioguardi, Fabio1,5 (AUTHOR), Selva, Jacopo6 (AUTHOR), Sandri, Laura2 (AUTHOR), Macedonio, Giovanni7 (AUTHOR), Caliro, Stefano7 (AUTHOR), Vougioukalakis, Georges8 (AUTHOR)
Source: Bulletin of Volcanology. Dec2024, Vol. 86 Issue 12, p1-17. 17p.
Subject Terms: *Volcanic gases, *Thermography, *Hydrogen sulfide, *Carbon dioxide, *Chemical reactions
Abstract: Nisyros Island (Greece) is affected by widespread gas emissions from fumarolic fields located at the bottom of hydrothermal craters in the southern part of its caldera. This morphology and the current low gas fluxes make Nisyros an ideal site for testing the limits of physics-based gas dispersal models in confined and low-emission conditions. Here, we focused our attention on the local scale volcanic gas dispersion from the Stephanos hydrothermal crater. In April 2023, a 1-week survey was carried out to measure weather data, CO2 and H2S gas fluxes, air concentrations from portable gas stations, and chemical composition of fumarolic gases and to acquire thermal images of the crater floor. These data were used as inputs and boundary conditions for numerical simulations using a DISGAS-2.6.0 model in order to quantify the present-day volcanic degassing and its associated uncertainties, accounting for the meteorological variability. Model results are provided in terms of H2S probabilistic exceedance and persistence maps, showing gas concentrations within the crater that fall below the thresholds indicated for the occurrence of serious respiratory problems. Since DISGAS-2.6.0 does not account for chemical reactions, this study represents a good opportunity to discuss the methodological limits of simulating the dispersion of H2S which is challenging due to its rapid degradation and dilution in the atmosphere. In this regard, we also provided an empirical law of the H2S depletion in low-emission conditions that takes into account the uncertainties related to the field measurements. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: enr
DbLabel: Energy & Power Source
An: 181830025
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Quantification of volcanic degassing and analysis of uncertainties using numerical modeling: the case of Stephanos crater (Nisyros Island, Greece).
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Massaro%2C+Silvia%22">Massaro, Silvia</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> silvia.massaro@uniba.it</i><br /><searchLink fieldCode="AR" term="%22Tamburello%2C+Giancarlo%22">Tamburello, Giancarlo</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bini%2C+Giulio%22">Bini, Giulio</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Costa%2C+Antonio%22">Costa, Antonio</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Stocchi%2C+Manuel%22">Stocchi, Manuel</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tassi%2C+Franco%22">Tassi, Franco</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Biagi%2C+Rebecca%22">Biagi, Rebecca</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vaselli%2C+Orlando%22">Vaselli, Orlando</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chiodini%2C+Giovanni%22">Chiodini, Giovanni</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dioguardi%2C+Fabio%22">Dioguardi, Fabio</searchLink><relatesTo>1,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Selva%2C+Jacopo%22">Selva, Jacopo</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sandri%2C+Laura%22">Sandri, Laura</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Macedonio%2C+Giovanni%22">Macedonio, Giovanni</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Caliro%2C+Stefano%22">Caliro, Stefano</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vougioukalakis%2C+Georges%22">Vougioukalakis, Georges</searchLink><relatesTo>8</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Bulletin+of+Volcanology%22">Bulletin of Volcanology</searchLink>. Dec2024, Vol. 86 Issue 12, p1-17. 17p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Volcanic+gases%22">Volcanic gases</searchLink><br />*<searchLink fieldCode="DE" term="%22Thermography%22">Thermography</searchLink><br />*<searchLink fieldCode="DE" term="%22Hydrogen+sulfide%22">Hydrogen sulfide</searchLink><br />*<searchLink fieldCode="DE" term="%22Carbon+dioxide%22">Carbon dioxide</searchLink><br />*<searchLink fieldCode="DE" term="%22Chemical+reactions%22">Chemical reactions</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Nisyros Island (Greece) is affected by widespread gas emissions from fumarolic fields located at the bottom of hydrothermal craters in the southern part of its caldera. This morphology and the current low gas fluxes make Nisyros an ideal site for testing the limits of physics-based gas dispersal models in confined and low-emission conditions. Here, we focused our attention on the local scale volcanic gas dispersion from the Stephanos hydrothermal crater. In April 2023, a 1-week survey was carried out to measure weather data, CO2 and H2S gas fluxes, air concentrations from portable gas stations, and chemical composition of fumarolic gases and to acquire thermal images of the crater floor. These data were used as inputs and boundary conditions for numerical simulations using a DISGAS-2.6.0 model in order to quantify the present-day volcanic degassing and its associated uncertainties, accounting for the meteorological variability. Model results are provided in terms of H2S probabilistic exceedance and persistence maps, showing gas concentrations within the crater that fall below the thresholds indicated for the occurrence of serious respiratory problems. Since DISGAS-2.6.0 does not account for chemical reactions, this study represents a good opportunity to discuss the methodological limits of simulating the dispersion of H2S which is challenging due to its rapid degradation and dilution in the atmosphere. In this regard, we also provided an empirical law of the H2S depletion in low-emission conditions that takes into account the uncertainties related to the field measurements. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=181830025
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s00445-024-01779-9
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 1
    Subjects:
      – SubjectFull: Volcanic gases
        Type: general
      – SubjectFull: Thermography
        Type: general
      – SubjectFull: Hydrogen sulfide
        Type: general
      – SubjectFull: Carbon dioxide
        Type: general
      – SubjectFull: Chemical reactions
        Type: general
    Titles:
      – TitleFull: Quantification of volcanic degassing and analysis of uncertainties using numerical modeling: the case of Stephanos crater (Nisyros Island, Greece).
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Massaro, Silvia
      – PersonEntity:
          Name:
            NameFull: Tamburello, Giancarlo
      – PersonEntity:
          Name:
            NameFull: Bini, Giulio
      – PersonEntity:
          Name:
            NameFull: Costa, Antonio
      – PersonEntity:
          Name:
            NameFull: Stocchi, Manuel
      – PersonEntity:
          Name:
            NameFull: Tassi, Franco
      – PersonEntity:
          Name:
            NameFull: Biagi, Rebecca
      – PersonEntity:
          Name:
            NameFull: Vaselli, Orlando
      – PersonEntity:
          Name:
            NameFull: Chiodini, Giovanni
      – PersonEntity:
          Name:
            NameFull: Dioguardi, Fabio
      – PersonEntity:
          Name:
            NameFull: Selva, Jacopo
      – PersonEntity:
          Name:
            NameFull: Sandri, Laura
      – PersonEntity:
          Name:
            NameFull: Macedonio, Giovanni
      – PersonEntity:
          Name:
            NameFull: Caliro, Stefano
      – PersonEntity:
          Name:
            NameFull: Vougioukalakis, Georges
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 12
              Text: Dec2024
              Type: published
              Y: 2024
          Identifiers:
            – Type: issn-print
              Value: 02588900
          Numbering:
            – Type: volume
              Value: 86
            – Type: issue
              Value: 12
          Titles:
            – TitleFull: Bulletin of Volcanology
              Type: main
ResultId 1