On Estimating Chemical Discharge into the World Ocean with Groundwater

A quantitative estimate is made for the first time for the role of some chemicals discharged with groundwater into seas and oceans in the formation of hydrochemical regime in the coastal zone. The estimate is based on the regional and global regularities in the formation and distribution of submarine groundwater discharge into seas and oceans. A concept is proposed regarding the existence of geochemical and biological barriers on the submarine groundwater–seawater interface, which cause significant transformation and losses of many chemical elements.