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oapen-20.500.12657-492772021-11-23T13:49:46Z Chapter The Emissions of the Tagoro Submarine Volcano (Canary Islands, Atlantic Ocean): Effects on the Physical and Chemical Properties of the Seawater Santana-Casiano, Juana Magdalena González-Dávila, Melchor Fraile-Nuez, Eugenio submarine volcano, CO2, acidification, fertilization, pH, ferrous iron, redox potential bic Book Industry Communication::R Earth sciences, geography, environment, planning::RB Earth sciences::RBC Volcanology & seismology This chapter presents the changes and evolution of the physical and chemical properties of the seawater south of the El Hierro Island (Canary archipelago, Atlantic Ocean) as a consequence of the emissions of the Tagoro submarine volcano, over a 6 year study from 2011 to 2016. Since the eruption, a series of oceanographic studies have been carried out in the area focusing on the evolution of the redox potential and the pH, two master variables that control the chemical equilibrium in sea water. The changes experienced by the carbon dioxide system, the variations in the concentration of Fe(II) and their correlation with the decrease in the pH during the evolution of the volcano, from the beginning of the eruptive stage to the post-eruptive phase, are discussed. The increased TDFe(II) concentrations and the low associated pHT values have controlled the occurrence of an important fertilization event in the sea water around the volcano at the Island of El Hierro, providing optimal conditions for the regeneration of the area. The sites like the Tagoro submarine volcano, in its degasification stage, provide an excellent opportunity to study the carbonate system in a high CO2 world, the volcanic contribution to the global volcanic carbon flux and the potential environmental impact of these emissions on the surrounding ocean and the ecosystem. 2021-06-02T10:11:12Z 2021-06-02T10:11:12Z 2018 chapter ONIX_20210602_10.5772/intechopen.70422_391 https://library.oapen.org/handle/20.500.12657/49277 eng application/pdf n/a 56670.pdf InTechOpen 10.5772/intechopen.70422 10.5772/intechopen.70422 09f6769d-48ed-467d-b150-4cf2680656a1 FP7-ENV-2010 264879 open access
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This chapter presents the changes and evolution of the physical and chemical properties of the seawater south of the El Hierro Island (Canary archipelago, Atlantic Ocean) as a consequence of the emissions of the Tagoro submarine volcano, over a 6 year study from 2011 to 2016. Since the eruption, a series of oceanographic studies have been carried out in the area focusing on the evolution of the redox potential and the pH, two master variables that control the chemical equilibrium in sea water. The changes experienced by the carbon dioxide system, the variations in the concentration of Fe(II) and their correlation with the decrease in the pH during the evolution of the volcano, from the beginning of the eruptive stage to the post-eruptive phase, are discussed. The increased TDFe(II) concentrations and the low associated pHT values have controlled the occurrence of an important fertilization event in the sea water around the volcano at the Island of El Hierro, providing optimal conditions for the regeneration of the area. The sites like the Tagoro submarine volcano, in its degasification stage, provide an excellent opportunity to study the carbonate system in a high CO2 world, the volcanic contribution to the global volcanic carbon flux and the potential environmental impact of these emissions on the surrounding ocean and the ecosystem.
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