Which mechanism triggers coastal upwelling occurrences due to the Coriolis effect?

💡 Explanation

When wind blows parallel to a coastline in the Northern Hemisphere, the Coriolis effect deflects surface water 45° to the right, resulting in Ekman transport causing surface water divergence seaward, replaced by deep, nutrient-rich water. Therefore coastal upwelling results, rather than onshore convergence, atmospheric subsidence, or thermocline deepening that indicate downwelling.

• Which risk increases when rapidly rising floodwater overtops a natural levee along a major river?
• Which risk increases when a city's sewage pipes cross a strike-slip fault?
• Which pattern results from combined Hadley cell circulation and the Coriolis effect on global wind directions?
• Which outcome occurs when a building's foundation warms discontinuous permafrost?
• Which outcome commonly occurs from increased silt weathering in loess deposits?
• Which process limits coastal upwelling efficiency during El Niño events?