Which cascading effect occurs when the Walker circulation weakens during an El Niño event across pacific ocean?

💡 Explanation

When Walker circulation weakens due El Niño, upwelling of nutrient-rich waters diminishes because reduced trade winds lessen the vertical mixing, thus reducing nutrient availability in surface seawater. Therefore reduced nutrient availability, instead of enhance upwelling or reducing themocline, happens, because upwelling depends on wind driven mixing.

• Which climatic response increases when weakened trade winds reduce upwelling during an El Niño event?
• Which outcome occurs when a mid-latitude cyclone intensifies, disrupting normal Hadley cell circulation?
• Which effect rapidly decreases when salinity stratification weakens in North Atlantic circulation?
• Which effect contributes to desert formation along the western coasts of continents associated with strong subtropical gyres?
• Which mechanism disrupts marine ecosystem nutrient cycling given increased Arctic glacial meltwater inflow?
• Which mechanism causes descending air in Hadley cells to create desert regions around 30 degrees latitude?