Which risk increases when deep ocean upwelling stagnates?

💡 Explanation

Coastal desertification increases because phytoplankton depend on upwelling for nutrients; a stagnation interrupts the nutrient transport via **convection**, which is essential for sustaining marine ecosystems, therefore damaging coastal regions rather than increasing circulation.

• Which risk significantly increases when coastal upwelling currents weaken during an El Niño event?
• Which process drives the formation of island arcs at subduction zones experiencing volatile flux?
• Which phenomenon causes increased soil acidity due to mineral depletion?
• Which consequence results when a breakwater disrupts longshore drift?
• Which outcome occurs when extensive loess deposits erode?
• Which outcome results in Arctic streams when permafrost degradation occurs?