Which process primarily regulates water temperature within an ocean gyre's core?

💡 Explanation

When shortwave radiation reaches the ocean's surface, the albedo (reflectivity) and incident angle dictates amount absorbed, driving heating because direct solar radiation dominates at the surface of the gyre core. Therefore, radiation dictates core temperature, rather than mixing, geothermal vents, or advection occurring due to separate mechanisms.

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• Which long-term geomorphic consequence primarily results when isostatic rebound occurs after glacial retreat in fjord regions?