Which effect results when an El Niño event suppresses upwelling along the Peruvian coast?

💡 Explanation

When El Niño suppresses coastal upwelling, the nutrient supply diminishes because the thermocline deepens, reducing the flow of deep, nutrient-rich water to the surface promoting phytoplankton growth and oxygen production. Therefore, oxygen depletion and mortality result, rather than increased productivity, fog formation, or strengthened trade winds which require different oceanic conditions.

• Which outcome results when interseismic stress exceeds frictional strength along a subduction zone megathrust fault?
• Which risk increases when thawing permafrost destabilizes infrastructure foundations?
• Which mechanism causes rapid stream incision following an earthquake along a strike-slip fault?
• Which atmospheric process is directly driven by differential heating between equator and poles?
• Which mechanism causes increased stream meandering along coastlines during periods of rising sea level?
• Which mechanism causes intense focused precipitation as an atmospheric river interacts with coastal mountain ranges?