Unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground-based Fourier transform infrared spectroscopy
<p>We developed an optimal-estimation algorithm to simultaneously retrieve, for the first time, coexisting volcanic gaseous <span class="inline-formula">SO<sub>2</sub></span> and sulfate aerosols (SA) from ground-based Fourier transform infrared (FTIR) observ...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2019-10-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/12/5381/2019/amt-12-5381-2019.pdf |
| _version_ | 1819040460432211968 |
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| author | P. Sellitto H. Guermazi H. Guermazi H. Guermazi E. Carboni E. Carboni E. Carboni R. Siddans M. Burton |
| author_facet | P. Sellitto H. Guermazi H. Guermazi H. Guermazi E. Carboni E. Carboni E. Carboni R. Siddans M. Burton |
| author_sort | P. Sellitto |
| collection | DOAJ |
| description | <p>We developed an optimal-estimation algorithm to simultaneously retrieve, for the first time, coexisting volcanic gaseous <span class="inline-formula">SO<sub>2</sub></span> and sulfate aerosols (SA) from ground-based Fourier transform infrared (FTIR) observations. These effluents, both linked to magmatic degassing process and subsequent atmospheric evolution processes, have overlapping spectral signatures leading to mutual potential interferences when retrieving one species without considering the other. We show that significant overestimations may be introduced in <span class="inline-formula">SO<sub>2</sub></span> retrievals if the radiative impact of coexistent SA is not accounted for, which may have impacted existing <span class="inline-formula">SO<sub>2</sub></span> long-term series, e.g. from satellite platforms. The method was applied to proximal observations at Masaya volcano, where <span class="inline-formula">SO<sub>2</sub></span> and SA concentrations, and SA acidity, were retrieved. A gas-to-particle sulfur partitioning of 400 and a strong SA acidity (sulfuric acid concentration: 65 %) were found, consistent with past in situ observations at this volcano. This method is easily exportable to other volcanoes to monitor magma extraction processes and the atmospheric sulfur cycle in the case of ash-free plumes.</p> |
| first_indexed | 2024-12-21T09:09:27Z |
| format | Article |
| id | doaj.art-3a0ca4d1e9d24d57a0ad97006e93933a |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-12-21T09:09:27Z |
| publishDate | 2019-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-3a0ca4d1e9d24d57a0ad97006e93933a2022-12-21T19:09:16ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482019-10-01125381538910.5194/amt-12-5381-2019Unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground-based Fourier transform infrared spectroscopyP. Sellitto0H. Guermazi1H. Guermazi2H. Guermazi3E. Carboni4E. Carboni5E. Carboni6R. Siddans7M. Burton8Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583, Université Paris-Est Créteil, Université de Paris, Institut Pierre Simon Laplace, Créteil, FranceLaboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583, Université Paris-Est Créteil, Université de Paris, Institut Pierre Simon Laplace, Créteil, FranceLaboratoire de Météorologie Dynamique, UMR CNRS 8539, École Normale Supérieure, PSL Research University, École Polytechnique, Sorbonne Universités, École des Ponts PARISTECH, Institut Pierre Simon Laplace, Paris, FranceNational School of Engineers of Sfax, Water, Energy and Environment Laboratory L3E, University of Sfax, Sfax, TunisiaCOMET, Atmospheric, Oceanic and Planetary Physics, University of Oxford, Clarendon Laboratory, Oxford, UKUK Research and Innovation, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton, UKNERC, National Centre for Earth Observation (NCEO), University of Leicester, Leicester, UKUK Research and Innovation, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton, UKSchool of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, UK<p>We developed an optimal-estimation algorithm to simultaneously retrieve, for the first time, coexisting volcanic gaseous <span class="inline-formula">SO<sub>2</sub></span> and sulfate aerosols (SA) from ground-based Fourier transform infrared (FTIR) observations. These effluents, both linked to magmatic degassing process and subsequent atmospheric evolution processes, have overlapping spectral signatures leading to mutual potential interferences when retrieving one species without considering the other. We show that significant overestimations may be introduced in <span class="inline-formula">SO<sub>2</sub></span> retrievals if the radiative impact of coexistent SA is not accounted for, which may have impacted existing <span class="inline-formula">SO<sub>2</sub></span> long-term series, e.g. from satellite platforms. The method was applied to proximal observations at Masaya volcano, where <span class="inline-formula">SO<sub>2</sub></span> and SA concentrations, and SA acidity, were retrieved. A gas-to-particle sulfur partitioning of 400 and a strong SA acidity (sulfuric acid concentration: 65 %) were found, consistent with past in situ observations at this volcano. This method is easily exportable to other volcanoes to monitor magma extraction processes and the atmospheric sulfur cycle in the case of ash-free plumes.</p>https://www.atmos-meas-tech.net/12/5381/2019/amt-12-5381-2019.pdf |
| spellingShingle | P. Sellitto H. Guermazi H. Guermazi H. Guermazi E. Carboni E. Carboni E. Carboni R. Siddans M. Burton Unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground-based Fourier transform infrared spectroscopy Atmospheric Measurement Techniques |
| title | Unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground-based Fourier transform infrared spectroscopy |
| title_full | Unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground-based Fourier transform infrared spectroscopy |
| title_fullStr | Unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground-based Fourier transform infrared spectroscopy |
| title_full_unstemmed | Unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground-based Fourier transform infrared spectroscopy |
| title_short | Unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground-based Fourier transform infrared spectroscopy |
| title_sort | unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground based fourier transform infrared spectroscopy |
| url | https://www.atmos-meas-tech.net/12/5381/2019/amt-12-5381-2019.pdf |
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