Oceanography is the study of the salt water bodies around the globe.

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It is first looked at in the aspect of pysical oceanography. This consists of studying the movement of water masses due to their relative physical properties like temperature and density. It also looks at the effect physical principles on the water masses and currents such as the coriolis force, vorticity, Ekman transport as well as the impact caused by the geometry of the sea floor.

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The second aspect of oceanography is to study its chemistry. This section looks at the chemical exchanges between seawater and the athmosphere (CO2 for example), the sea floor as well as the chemical variations brought by sediment discharge, volcanism and biological and human input.

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The last aspect of this domain is to look at the biology. It studies how life has affected the ocean and vice versa. There are already plenty of examples ranging from life altering the chemistry of the water (O2 depletion, nutrient consumption and transport, CO2 to O2 converstion, alkalinity variations...) and many more are het co come.

Understanding the ocean and its complexe nature allows to better understand the human impact and thus preserve and expoit sea ressources responsably.