Editing Ocean surface acidity (pH) (section)

== Geographic / System Context ==
Ocean surface acidity is a global phenomenon affecting the uppermost layer of the world's oceans. The surface ocean interacts directly with the atmosphere, facilitating the exchange of gases such as carbon dioxide, which influences pH levels. Geographic variability in surface ocean pH arises from factors including temperature, salinity, biological activity, and regional carbon fluxes. Coastal regions, open ocean basins, and polar seas each exhibit distinct pH characteristics shaped by local and global processes.