As methane has 21 times the global warming potential as the same mass of carbon dioxide, it is important to determine the physical processes which contribute to the upward flux to the atmosphere from methane-containing submarine seeps. The Black Sea’s contribution to the global methane flux is a growing concern, it is important to properly understand the relevant transport mechanisms in thewater column. Subsurface methane is released into thewater column in the Black Sea from destabilizing methane hydrates and active seep areas.Vertical methane transport can occur due to bubble transport, methane-induced bubble plumes and turbulent diffusion. The combination of modeling and analysis reveals that advective methane transport to the surface from plumes and gas bubbles is very low, and only occurs in very shallow sites (<200 m). Furthermore, the low turbulent diffusion coefficient and the relatively high methane oxidation rates are important processes that hinder high methane contributions to the atmosphere.