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OCEANOGRAPHY
Lesson 4 - Page 4

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The oceanís chemical composition changes vertically and laterally because of geological and biological parameters. Scientists use sampling equipment that monitor portions of the oceans. The oceans are vast, so it is difficult to obtain continuous data, especially with respect to depth.

Chemical composition varies depending on many factors. The gas exchange with the atmosphere, the ability of compounds and elements to dissolve, anaerobic bacteria, interaction of the ocean bottom, inflow of fresh water, freezing and melting of sea ice, and biological process all play vital roles in determining the chemistry of seawater.


Sampling for chemical analysis


Chemical analysis on shipboard lab

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