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Methods of acoustic gas flux inversion—Investigation into the initial amplitude of bubble excitation

par Roche, Ben John ;White, Paul R.;Bull, Jonathan M.;Leighton, Timothy G.;Li, Jianghui;Christie, Colin;Fone, Joseph
Référence The Journal of the Acoustical Society of America, 152, 2, page (799-806)
Publication Publié, 2022-08-01

Article révisé par les pairs

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Résumé :

Passive acoustic inversion techniques for measuring gas flux into the water column have the potential to be a powerful tool for the long-term monitoring and quantification of natural marine seeps and anthropogenic emissions. Prior inversion techniques have had limited precision due to lack of constraints on the initial amplitude of a bubble's excitation following its release into the water column (Rε0i). Rε0i is determined by observing the acoustic signal of bubbles released from sediment in a controlled experiment and its use is demonstrated by quantifying the flux from a volcanic CO2 seep offshore Panarea (Italy), improving the precision by 78%.