Which biogeochemical outcome results during El Niño events?

💡 Explanation

Reduced coastal upwelling lowers primary productivity because nutrient transport stops; equatorial Walker circulation weakens, suppressing upwelling, therefore less nutrient-rich water reaches surface rather than higher productivity.

• Which consequence results when excessive irrigation saturates agricultural soils?
• Which outcome primarily results when mountain ranges disrupt atmospheric air streams?
• Which phenomenon causes melting in the mantle wedge above a subducting oceanic plate?
• Which risk increases during lahar formation near stratovolcanoes?
• Which outcome occurs when increased bioturbation affects floodplain soil?
• Which outcome occurs when meltwater influx disrupts fjordic basin ventilation?