Which risk escalates globally during El Niño events?

💡 Explanation

El Niño diminishes trade winds preventing upwelling, which reduces nutrient flow, therefore coral bleaching increases because warmer waters stress corals, rather than increased ocean productivity which requires nutrient-rich upwelling.

• Which consequence results when excessive groundwater extraction destabilizes karst topography?
• Which outcome occurs when a barrier island migrates landward?
• Which perturbation arises during strong El Niño phases?
• Which process limits surface nitrate replenishment within subtropical gyres?
• Which outcome results when an orographic lifting near mountain streams encounters stable air mass conditions?
• Which risk increases when rapid levee construction uses poorly compacted fill material on a floodplain lacking vegetation?