Which risk significantly increases when coastal upwelling stalls?

💡 Explanation

An upwelling stall limits nutrient dispersal, leading to concentrated nutrients and therefore phytoplankton blooms that can become dangerously toxic, because nutrient dispersal stops by Ekman transport. Consequences occur locally, specifically harmful algal bloom intensification in coastal regions, rather than the glacial melting or thermohaline alterations.

• Which risk increases adjacent to a river reach where artificial levees have been recently constructed?
• Which mechanism limits the depth of wind-driven oceanic circulation?
• Which mechanism increases desertification when the Hadley cell expands due to global warming?
• Which risk increases when coastal afforestation near mobile dunes is conducted without permeability planning?
• Which mechanism causes an avulsion event when a river's levee system is overwhelmed by sediment deposition?
• Which outcome is primarily caused when differential heating establishes atmospheric cells near the equator?