Silicon can enter the oceans through groundwater and riverine transport. Large fluxes of groundwater input have an isotopic composition which is distinct from riverine silicon inputs. Isotopic variations in groundwater and riverine transports contribute to variations in oceanic 30Si values. Currently, there are substantial differences in the isotopic values of deep water in the world's ocean basins. Between the Atlantic and Pacific oceans, there is a deep water 30Si gradient of greater than 0.3 parts per thousand. 30Si is most commonly associated with productivity in the oceans.
silicon can enter the oceans through groundwater and riverine transport large fluxes of groundwater input have an isotopic composition which is distinct from riverine silicon inputs isotopic variations in groundwater and riverine transports contribute to variations in oceanic 30si values currently there are substantial differences in the isotopic values of deep water in the world's ocean basins between the atlantic and pacific oceans there is a deep water 30si gradient of greater than 03 parts per thousand 30si is most commonly associated with productivity in the oceans