CO2 budget from a 3D chemical tomography of a degassing volcanic lake (Lagoa das Furnas, Sao Miguel, Azores)

被引：0

作者：

Tamburello, Giancarlo ^{[1
]}

Rouwet, Dmitri ^{[1
]}

Andrade, Cesar ^{[2
]}

Viveiros, Fatima ^{[2
,3
]}

Cruz, J. Virgilio ^{[2
,3
]}

机构：

[1] Ist Nazl Geofis & Vulcanol, Sez Bologna, Viale Berti Pichat 6-2, Bologna, Italy

[2] Univ Acores, IVAR Inst Invest Vulcanol & Avaliacao Riscos, Rua Mae Deus,Edificio Complexo Cientif,3 Andar Ala, P-9500321 Ponta Delgada, Portugal

[3] Univ Acores, FCT Fac Ciencias & Tecnol, Ponta Delgada, Portugal

来源：

JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH | 2024年 / 447卷

关键词：

Volcanic lake; Dissolved CO 2; Chemical tomography; CO; 2; budget; Volcanic hazard; ORGANIC-MATTER; CRATER LAKES; EMISSION; ISLAND; DEGRADATION; INSIGHTS; MONOUN; FLUX; NYOS;

D O I：

10.1016/j.jvolgeores.2024.108012

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We here present a 3D mapping of the dissolved CO2 at Lagoa das Furnas (Sa similar to o Miguel Island, Azores) obtained with an infrared -based probe that measures the partial pressure of CO2 gas dissolved in liquids, and a multiparametric probe to measure pH, ORP, conductivity, dissolved O2, and temperature. We interpolated the dissolved CO2 at different depths and around the lake to calculate the total mass of CO2 dissolved as CO2 (aq) (109-176 tons). We identified different plumes of dissolved CO2 that spatially correspond to previously detected shallow anomalies of the diffusive CO2 degassing at the water-air (interface) and hydroacoustic signatures of the bubbling activity. Our result represents the first direct quantification of the total dissolved CO2 in a volcanic lake, opening new perspectives for volcanic lake monitoring and related hazard assessment.

引用

页数：8