Quantification of CH4 loss and transport in dissolved plumes of the Santa Barbara Channel, California

► Methane transport and loss terms estimated in dissolved methane plumes. ► We measured methane concentrations, oxidation rates, and current velocity. ► We quantified methane advection and turbulent diffusion as transport terms. ► We quantified sea-air transfer and microbial oxidation as loss terms of methane. ► The fate of methane was modeled suggesting microbial oxidation is the major sink.