GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 1.2 GNGTS 2024 Inverse modelling as a powerful tool for estmatng gas fow emission rate from statonary hydrothermal vents A. Semprebello 1 , G. Lazzaro* 1 , C. Caruso 1 , S. Scirè Scappuzzo 1 , S. Morici 1 , A. Gatuso 1 , M. Longo 1 1 Natonal Insttute of Geophysics and Volcanology – Palermo (INGV, Italy) Submarine hydrothermal systems emit into the sea water huge amounts of both elements and energy, in terms of gas emissions, thermal water and solid depositon. The interest of the scientfc community in these systems, classifed as extreme environments in relaton to their features (e.g. high temperature, low Ph) is increasing, especially in the last few years. However, direct measures can be challenging due to the extreme environmental conditons [Heinicke et al. 2009, Longo et al. 2021]. In this framework, passive passive hydroacoustcs may represent a sustainable and safe method for both short- and long-term monitoring, since the typical source mechanisms present in the hydrothermal felds radiate sound pressure following diferent acoustc modes directly related to ascending fuids release (Dziak et al. 2002, Dziak et al. 2012, Li et al. 2021). Partcularly, the research actvity presented here has been focused on the estmaton of the gas fow emission rate from a statonary-high fux vent (Leifer and Tang 2007) located at ~16 meters depth, inside the hydrothermal feld 2 miles East ofshore Panarea island (see Fig. 1) in the NE sector of Aeolian arc (Aeolian Island, Italy).