Because salinity (in concert with temperature) affects the density of seawater, it can play a role in its vertical stratification. Essentially, lower salinity water (= lower density) floats on top of higher salinity water (= higher density).
Alternative definition, a choice limited to one of two or more possibilities, as of things, propositions, or courses of action, the selection of which precludes any other possibility: You have the alternative of riding or walking. See more.
Collins Concise English Dictionary Â© HarperCollins Publishers:: explanation /ËÉksplÉËneÉªÊÉn/ n the act or process of explaining a statement or occurrence that explains a clarification of disputed terms or points; reconciliation. 1  the act or process of explaining. 2  a statement or occurrence that explains.