2024/01/24 by Giancarlo Tamburello, Dmitri Rouwet, César Andrade +2
Earth and Planetary Sciences · Environmental Science · #Atmospheric and Environmental Gas Dynamics #CO2 Sequestration and Geologic Interactions #Ocean Acidification Effects and Responses
paper · doi:10.1016/j.jvolgeores.2024.108012
openalex publication_date 2024/01/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
We here present a 3D mapping of the dissolved CO 2 at Lagoa das Furnas (São Miguel Island, Azores) obtained with an infrared-based probe that measures the partial pressure of CO₂ gas dissolved in liquids, and a multi-parametric probe to measure pH, ORP, conductivity, dissolved O 2 , and temperature. We interpolated the dissolved CO 2 at different depths and around the lake to calculate the total mass of CO 2 dissolved as CO 2 (aq) (109–176 tons). We identified different plumes of dissolved CO 2 that spatially correspond to previously detected shallow anomalies of the diffusive CO 2 degassing at the water-air (interface) and hydroacoustic signatures of the bubbling activity. Our result represents the first direct quantification of the total dissolved CO 2 in a volcanic lake, opening new perspectives for volcanic lake monitoring and related hazard assessment. • Heterogeneous distribution of dissolved CO 2 in volcanic lakes. • Measuring multiple vertical profiles of dissolved CO 2 and water physicochemical parameters. • Interpolating dissolved CO 2 measurements to obtain a 3d reconstruction of the CO 2 content. • Identifying areas with higher CO 2 emissions from the lake bottom and gas plumes.