Which process drives thermohaline circulation in deep glacial lakes during winter stratification?

💡 Explanation

When surface water approaches freezing, density increases because colder water is denser than warmer water, causing it to sink to the hypolimnion, driving thermohaline circulation. Therefore, surface water freezing density increase results, rather than epilimnion absorption, hypolimnion mixing or the rare metalimnion effect, which all depend on different temperature-density relationships.

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