The quantification of the physical oceanographic, biological, and geochemical processes maintaining the supersaturation of methane in the surface ocean off southern California were addressed. Data were obtained in the laboratory and at sea during twelve cruises off southern California over a period of 37 months. The magnitude of methane concentrations in southern California waters and its variability across space and time was consistent with the proximity of hydrocarbon seeps to regions of physical mixing and stirring. In vitro production of CH;The flux of CH... |