Which process primarily drives thermohaline circulation in the ocean during winter?

💡 Explanation

When surface water cools in winter, its density increases because cold water molecules pack more closely, causing dense water to sink and drive thermohaline circulation. Therefore increased density is the primary driver, rather than solar radiation, reduced wind, or coastal upwelling which require different drivers related to insolation heating, momentum transfer, or bathymetry.

• Which outcome arises when freeze-thaw cycles erode granite cirques?
• Which risk increases on gentle slopes underlain by permafrost undergoing active solifluction?
• What primary outcome arises from increased coastal sandstone erosion due to intensified wave action?
• Which outcome commonly occurs as rising sea temperatures change thermal stratification near island coasts?
• Which pattern results from combined Hadley cell circulation and the Coriolis effect on global wind directions?
• Which outcome occurs when a proglacial lake rapidly drains due to ice dam collapse?