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.
Definition of interpretation. 1  1 : the act or the result of interpreting : explanation. 2  2 : a particular adaptation or version of a work, method, or style. 3  3 : a teaching technique that combines factual with stimulating explanatory information natural history interpretation program.