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This is the definition of gyre: a giant circular ocean current.
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A gyre is not just any circular ocean current; it is specifically a massive and rotating system of ocean currents that often spans vast distances. These gyres are driven by powerful forces such as the Earth's rotation, wind patterns, and the distribution of temperature and salinity in the water. The circular motion of a gyre is often likened to that of a whirlpool, with water moving in a continuous loop. These currents not only play a crucial role in redistributing heat and nutrients, but they also have a significant impact on global climate patterns and the distribution of marine organisms. Overall, a gyre can be considered as a dynamic and complex oceanic phenomenon that shapes the movement and interactions of both seawater and marine life on a large scale.