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| Titel |
Tunable diode laser measurements of hydrothermal/volcanic CO2 and implications for the global CO2 budget |
| VerfasserIn |
M. Pedone, A. Aiuppa, G. Giudice, F. Grassa, V. Francofonte, B. Bergsson, E. Ilyinskaya |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 5, no. 2 ; Nr. 5, no. 2 (2014-12-02), S.1209-1221 |
| Datensatznummer |
250115353
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| Publikation (Nr.) |
 copernicus.org/se-5-1209-2014.pdf |
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| Zusammenfassung |
| Quantifying the CO2 flux sustained by low-temperature fumarolic fields
in hydrothermal/volcanic environments has remained a challenge, to date.
Here, we explored the potential of a commercial infrared tunable laser unit
for quantifying such fumarolic volcanic/hydrothermal CO2 fluxes. Our
field tests were conducted between April 2013 and March 2014 at Nea Kameni
(Santorini, Greece), Hekla and Krýsuvík (Iceland) and Vulcano
(Aeolian Islands, Italy). At these sites, the tunable laser was used to
measure the path-integrated CO2 mixing ratios along cross sections of
the fumaroles' atmospheric plumes. By using a tomographic post-processing
routine, we then obtained, for each manifestation, the contour maps of
CO2 mixing ratios in the plumes and, from their integration, the
CO2 fluxes. The calculated CO2 fluxes range from low
(5.7 ± 0.9 t d−1; Krýsuvík) to moderate
(524 ± 108 t d−1; La Fossa crater, Vulcano). Overall, we suggest
that the cumulative CO2 contribution from weakly degassing volcanoes in
the hydrothermal stage of activity may be significant at the global scale. |
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