Which mechanism causes increased coastal desertification when a major ocean gyre weakens?

💡 Explanation

When a gyre weakens, it reduces upwelling because decreased rotational forces diminish wind-driven surface water divergence, which normally brings cold, nutrient-rich water to the surface that stabilizes local climate. Therefore reduced cold water upwelling results, rather than saline intrusion, subsidence, or sediment transport which are dependent upon other processes.

• Which outcome occurs when differential stress exceeds the static friction across a fault plane at depth?
• Which process drives the formation of an arête between two cirques after glacial retreat?
• Which outcome commonly results following extensive groin construction inhibiting longshore sediment transport near barrier islands?
• Which process explains stratovolcano eruptions after extended repose periods due to magma evolution?
• Which long-term outcome results when glacial melt decreases the settling velocity in meltwater streams?
• Which outcome occurs when the Juan de Fuca plate heavily subducts under North America?