Which ocean outcome results during intense El Niño?

💡 Explanation

El Niño causes suppression of normal coastal upwelling via changes in trade winds and ocean temperature gradients; therefore, nutrient-rich cold water ceases to rise, rather than the intensification of the thermohaline cycle, which is related to density gradients and deep water formation.

• Which mechanism increases lahar hazard during and after stratovolcano eruption sequences?
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• Which risk increases substantially for older unreinforced masonry buildings during an earthquake?
• Which outcome occurs when groundwater depletion lowers the potentiometric surface in soluble bedrock?
• Which outcome is initiated when excessive pyroclastic material accumulates?
• Which mechanism explains stream channel pattern changes when base level significantly drops due to rapid tectonic uplift?