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  1. 防災科研関係論文

Diffuse volcanic gas emission and thermal energy release from the summit crater of Pico do Fogo, Cape Verde

https://nied-repo.bosai.go.jp/records/4168
https://nied-repo.bosai.go.jp/records/4168
8f1d733a-1d44-4aaa-8c4d-5ef568884b1e
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Diffuse volcanic gas emission and thermal energy release from the summit crater of Pico do Fogo, Cape Verde
言語
言語 eng
著者 Samara M. Dionis

× Samara M. Dionis

en Samara M. Dionis

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Gladys Melian

× Gladys Melian

en Gladys Melian

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Fatima Rodriguez

× Fatima Rodriguez

en Fatima Rodriguez

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Pedro A. Hernandez

× Pedro A. Hernandez

en Pedro A. Hernandez

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Eleazar Padron

× Eleazar Padron

en Eleazar Padron

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Nemesio M. Perez

× Nemesio M. Perez

en Nemesio M. Perez

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Jose Barrancos

× Jose Barrancos

en Jose Barrancos

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German Padilla

× German Padilla

en German Padilla

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Hirochika Sumino

× Hirochika Sumino

en Hirochika Sumino

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Paulo Fernandes

× Paulo Fernandes

en Paulo Fernandes

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Zuleyka Bandomo

× Zuleyka Bandomo

en Zuleyka Bandomo

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Sonia Silva

× Sonia Silva

en Sonia Silva

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Jose M. Pereira

× Jose M. Pereira

en Jose M. Pereira

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Helio Semedo

× Helio Semedo

en Helio Semedo

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抄録
内容記述タイプ Other
内容記述 We report the first detailed study of diffuse emission of carbon dioxide (CO2), hydrogen sulfide (H2S), helium (He), and hydrogen (H-2) from the summit crater of Pico do Fogo volcano, Cape Verde. Diffuse CO2, H2S, He, and H-2 gas fluxes were measured at 57 sampling sites and ranged up to 12,800, 13, 1, and 6 g m(-2) day(-1), respectively. Soil temperature measurements at each sampling site were used to evaluate the heat flux. Most of the summit crater shows relatively high CO2 efflux, with highest values close to the fumarolic area, suggesting a structural control of the degassing process. In contrast, H2S effluxes were negligible or very low at the summit crater, except close to the fumarolic area where anomalously high CO2 efflux and soil temperatures were also measured. We estimate total CO2, H2S, He, and H-2 diffuse gas fluxes of 219 t day(-1), 25, 4, and 33 kg day(-1), respectively. Based on a H2O/CO2 mass ratio of 1.52 measured at the fumaroles, we estimate a diffuse steam flux from the summit crater of approximately 330 t day(-1). The enthalpy of this steam is equivalent to a heat flux of about 10.3 MW. The diffuse gas emission and thermal energy released from the summit crater of Pico do Fogo volcano are comparable to those observed at other volcanoes. Sustained surveillance of Pico do Fogo using these methods will be valuable for monitoring the activity of one of the most active volcanoes in the Atlantic Ocean.
言語 en
書誌情報 en : BULLETIN OF VOLCANOLOGY

巻 77, 号 2, p. 10
出版者
言語 en
出版者 SPRINGER
ISSN
収録物識別子タイプ EISSN
収録物識別子 1432-0819
DOI
関連識別子 10.1007/s00445-014-0897-4
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