Which circulation change reduces surface nutrient availability during El Niño?

💡 Explanation

Diminished trade winds during El Niño suppress upwelling: this mechanism reduces the transport of nutrient-rich deep water to ocean surface, because coastal upwelling is reduced. Therefore nutrient availability decreases at surface rather than increasing via mixing or wind.

• Which process increases surface clay accumulation following dust deposition?
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• Which effect amplifies hurricane spin in the Northern Hemisphere?
• Which global wind pattern results because persistent high-pressure zones descend?
• Which mechanism causes increased bank erosion in areas near alluvial gold mining operations?
• Which feedback loop slows permafrost thaw within cirques?