Which oxygen level results when intensified upwelling occurs?

💡 Explanation

Upwelling brings nutrient-rich but oxygen-depleted water to the surface; thus, decreased surface oxygen occurs because it displaces oxygenated surface waters through advection. This reduces surface oxygen rather than increasing it. Therefore, the concentration reduces, rather than remaining stable.

• Which topographic outcome results when aeolian deflation dominates?
• Which consequence results when crustal divergence is restricted?
• Which outcome typically occurs when a transform plate boundary impedes subduction?
• What occurs to local ocean temperature when a prolonged period of decreased trade winds weakens coastal upwelling?
• Which effect results when lithospheric plates shift along a transform boundary?
• Which weather pattern results at locations where the descending air of a Hadley cell dominates?