Which outcome occurs when coastal upwelling weakens during ENSO?

💡 Explanation

Reduced upwelling sharply limits nutrient transport to surface waters because nutrient cycling depends on wind-driven replacement. Therefore, primary productivity falls dramatically near the coast, rather than deep-water salinity changes, erosion lessening, or halted thermocline dynamics dominating.

• Which outcome occurs when a river's levees erode?
• Which risk predominates slope failure in mountainous regions with thawing permafrost?
• Which mechanism accelerates stream erosion as a result of increased glacial meltwater discharge?
• Which risk increases when rapidly rising floodwater overtops a natural levee along a major river?
• Which process causes seismic amplification when shear waves encounter a sedimentary basin bounded by a fault?
• Which consequence results when levees fail catastrophically during exceptional flooding on an alluvial plain containing a major river?