Which shift results when El Niño reduces upwelling?

💡 Explanation

Biological productivity suffers during ENSO events; nutrient upwelling diminishes due to weakening trade winds and thermocline suppression. This initiates nutrient depletion, so therefore marine productivity sharply declines because fewer nutrients reach the surface, rather than uniformity or sea-level change.

• Which outcome results when vegetation cover declines in arid regions?
• Which landform results in cooler regions when lava highly enriched with silica reaches the surface?
• Which outcome occurs when sediment load overwhelms a delta's outflow to a lake?
• Which outcome is caused when excessive freshwater influx weakens ocean gyre downwelling?
• Which process causes increased flood risk when increased impermeable coverage occurs on an alluvial fan?
• Which landscape feature primarily results due to solifluction processes in regions with permafrost?