Which process drives the circulation of nutrients in deep ocean layers?

💡 Explanation

When surface water increases in density due to cooling or increased salinity, thermohaline overturning occurs because gravity pulls this denser water downwards, driving deep ocean circulation and the redistribution of nutrients. Therefore, thermohaline overturning results, rather than upwelling, wind, or tidal mixing which are primarily surface processes.

• Which risk increases when a large dam is constructed across a strike-slip fault like the San Andreas Transform?
• Which outcome occurs when a river levee is rapidly saturated during an extreme flood event exceeding design capacity?
• Which risk increases when a road embankment is constructed on discontinuous permafrost terrain?
• Which effect primarily drives airflow deflection in upper-level jet streams within Hadley cells?
• Which process contributes to the formation of thermohaline stratification in deep lakes during winter?
• Which effect occurs when increased meltwater influx disrupts thermohaline circulation within North Atlantic gyres?