Continuous in situ measurements of volcanic gases with a diode-laser-based spectrometer: CO<sub>2 </sub>and H<sub>2</sub>O concentration and soil degassing at Vulcano (Aeolian islands: Italy)
<p>Abstract</p> <p>We report on a continuous-measurement campaign carried out in Vulcano (Aeolian islands, Sicily), devoted to the simultaneous monitoring of CO<sub>2 </sub>and H<sub>2</sub>O concentrations. The measurements were performed with an absorption...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2007-04-01
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| Series: | Geochemical Transactions |
| Online Access: | http://www.geochemicaltransactions.com/content/8/1/5 |
| _version_ | 1818568886938763264 |
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| author | De Natale Paolo Somma Renato Rocco Alessandra Gagliardi Gianluca De Rosa Maurizio De Natale Giuseppe |
| author_facet | De Natale Paolo Somma Renato Rocco Alessandra Gagliardi Gianluca De Rosa Maurizio De Natale Giuseppe |
| author_sort | De Natale Paolo |
| collection | DOAJ |
| description | <p>Abstract</p> <p>We report on a continuous-measurement campaign carried out in Vulcano (Aeolian islands, Sicily), devoted to the simultaneous monitoring of CO<sub>2 </sub>and H<sub>2</sub>O concentrations. The measurements were performed with an absorption spectrometer based on a semiconductor laser source emitting around a 2-<it>μ</it>m wavelength. The emitted radiation was selectively absorbed by two molecular ro-vibrational transitions specific of the investigated species. Data for CO<sub>2 </sub>and H<sub>2</sub>O concentrations, and CO<sub>2 </sub>soil diffusive flux using an accumulation chamber configuration, were collected at several interesting sampling points on the island (Porto Levante beach- PLB, Fossa Grande Crater – FOG- and Valley of Palizzi, PAL). CO<sub>2</sub>/H<sub>2</sub>O values, measured on the ground, are very similar (around 0.019 (± 0.006)) and comparable to the previous discrete detected values of 0.213 (Fumarole F5-La Fossa crater rim) and 0.012 (Fumarole VFS – Baia Levante beach) obtaid during the 1977–1993 heating phase of the crater fumaroles.</p> <p>In this work much more homogeneous values are found in different points of the three sites investigated. The field work, although carried out in a limited time window (25th–28th August 2004), pointed out the new apparatus is suitable for continuous gas monitoring of the two species and their ratios, which are important geochemical indicators of volcanic activity, for which other reliable continuous monitoring systems are not yet available.</p> |
| first_indexed | 2024-12-14T06:40:57Z |
| format | Article |
| id | doaj.art-725af3bb49994b9a9eef2c85ad34c427 |
| institution | Directory Open Access Journal |
| issn | 1467-4866 |
| language | English |
| last_indexed | 2024-12-14T06:40:57Z |
| publishDate | 2007-04-01 |
| publisher | BMC |
| record_format | Article |
| series | Geochemical Transactions |
| spelling | doaj.art-725af3bb49994b9a9eef2c85ad34c4272022-12-21T23:13:13ZengBMCGeochemical Transactions1467-48662007-04-0181510.1186/1467-4866-8-5Continuous in situ measurements of volcanic gases with a diode-laser-based spectrometer: CO<sub>2 </sub>and H<sub>2</sub>O concentration and soil degassing at Vulcano (Aeolian islands: Italy)De Natale PaoloSomma RenatoRocco AlessandraGagliardi GianlucaDe Rosa MaurizioDe Natale Giuseppe<p>Abstract</p> <p>We report on a continuous-measurement campaign carried out in Vulcano (Aeolian islands, Sicily), devoted to the simultaneous monitoring of CO<sub>2 </sub>and H<sub>2</sub>O concentrations. The measurements were performed with an absorption spectrometer based on a semiconductor laser source emitting around a 2-<it>μ</it>m wavelength. The emitted radiation was selectively absorbed by two molecular ro-vibrational transitions specific of the investigated species. Data for CO<sub>2 </sub>and H<sub>2</sub>O concentrations, and CO<sub>2 </sub>soil diffusive flux using an accumulation chamber configuration, were collected at several interesting sampling points on the island (Porto Levante beach- PLB, Fossa Grande Crater – FOG- and Valley of Palizzi, PAL). CO<sub>2</sub>/H<sub>2</sub>O values, measured on the ground, are very similar (around 0.019 (± 0.006)) and comparable to the previous discrete detected values of 0.213 (Fumarole F5-La Fossa crater rim) and 0.012 (Fumarole VFS – Baia Levante beach) obtaid during the 1977–1993 heating phase of the crater fumaroles.</p> <p>In this work much more homogeneous values are found in different points of the three sites investigated. The field work, although carried out in a limited time window (25th–28th August 2004), pointed out the new apparatus is suitable for continuous gas monitoring of the two species and their ratios, which are important geochemical indicators of volcanic activity, for which other reliable continuous monitoring systems are not yet available.</p>http://www.geochemicaltransactions.com/content/8/1/5 |
| spellingShingle | De Natale Paolo Somma Renato Rocco Alessandra Gagliardi Gianluca De Rosa Maurizio De Natale Giuseppe Continuous in situ measurements of volcanic gases with a diode-laser-based spectrometer: CO<sub>2 </sub>and H<sub>2</sub>O concentration and soil degassing at Vulcano (Aeolian islands: Italy) Geochemical Transactions |
| title | Continuous in situ measurements of volcanic gases with a diode-laser-based spectrometer: CO<sub>2 </sub>and H<sub>2</sub>O concentration and soil degassing at Vulcano (Aeolian islands: Italy) |
| title_full | Continuous in situ measurements of volcanic gases with a diode-laser-based spectrometer: CO<sub>2 </sub>and H<sub>2</sub>O concentration and soil degassing at Vulcano (Aeolian islands: Italy) |
| title_fullStr | Continuous in situ measurements of volcanic gases with a diode-laser-based spectrometer: CO<sub>2 </sub>and H<sub>2</sub>O concentration and soil degassing at Vulcano (Aeolian islands: Italy) |
| title_full_unstemmed | Continuous in situ measurements of volcanic gases with a diode-laser-based spectrometer: CO<sub>2 </sub>and H<sub>2</sub>O concentration and soil degassing at Vulcano (Aeolian islands: Italy) |
| title_short | Continuous in situ measurements of volcanic gases with a diode-laser-based spectrometer: CO<sub>2 </sub>and H<sub>2</sub>O concentration and soil degassing at Vulcano (Aeolian islands: Italy) |
| title_sort | continuous in situ measurements of volcanic gases with a diode laser based spectrometer co sub 2 sub and h sub 2 sub o concentration and soil degassing at vulcano aeolian islands italy |
| url | http://www.geochemicaltransactions.com/content/8/1/5 |
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