Editing Downwelling (section)

=== Buoyancy ===
[[Buoyancy]]-forced downwelling, often termed [[convection]], is the deepening of a water parcel due to a change in the density of that parcel. Density changes in the surface ocean are primarily the result of [[evaporation]], [[precipitation]], heating, cooling, or the introduction and mixing of an alternate water or salinity source, such as river input or [[brine rejection]]. Notably, convection is the driving force behind [[Thermohaline circulation|global thermohaline circulation]]. For a water parcel to move downward, the density of that parcel must increase; therefore, evaporation, cooling, and brine rejection are the processes that control buoyancy-forced downwelling.<ref name="Elsevier, AP-2011">{{Cite book |title=Descriptive physical oceanography: an introduction |date=2011 |publisher=Elsevier, AP |isbn=978-0-7506-4552-2 |editor-last=Talley |editor-first=Lynne D. |edition=6th |location=Amsterdam Heidelberg |editor-last2=Pickard |editor-first2=George L. |editor-last3=Emery |editor-first3=William J. |editor-last4=Swift |editor-first4=James H.}}</ref>