What brings greater concentrations of dissolved nutrients to the ocean surface?

Answer: Upwelling

Explanation:

Upwelling is a process of movement of dense, cold and nutrient rich water from the bottom of the ocean to the surface layers due to wind currents. This process replaces the warm and nutrient deficient water from the surface.

This process is useful for the growth of phytoplanktons and other sea plants growing in the surface layer of oceanic water.