What causes upwelling

Upwelling occurs when winds blowing across the ocean surface push water away from an area and subsurface water rises up to replace the diverging surface water. Major upwelling areas along the world's coasts are highlighted in red.

Explanation:

Upwelling occurs when winds blowing across the ocean surface push water away from an area and subsurface water rises up to replace the diverging surface water. Major upwelling areas along the world's coasts are highlighted in red.

Explanation:

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