These terms are the condition for which that code number is to be used. The terms may be synonyms of the code title, or, in the case of other specified codes, the terms are a list of the various conditions assigned to that code.
Physical oceanography, or marine physics, studies the ocean's physical attributes including temperature-salinity structure, mixing, surface waves, internal waves, surface tides, internal tides, and currents.
An ocean (from Ancient Greek á½ ÎºÎµÎ±Î½ÏÏ, transc. OkeanÃ³s, the sea of classical antiquity) is a body of saline water that composes much of a planet's hydrosphere. On Earth, an ocean is one of the major conventional divisions of the World Ocean, which covers almost 71% of its surface. These are, in descending order by area, the Pacific, Atlantic, Indian, Southern (Antarctic), and Arctic Oceans.