Science · 6 pages · 12 min
Density drives the slow deep flow, while the wind drives the faster currents at the surface.
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Thermohaline circulation is the deep, slow movement of seawater driven by differences in density, which come from temperature and salinity. A surface current is the faster flow of the upper ocean driven mainly by the wind, and the two connect without being the same machine. The opening covers density from temperature and salt, wind gyres in the upper ocean, and why the Gulf Stream is not only density.
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