Which mechanism predominantly causes thermohaline circulation slowdown in high-latitude lakes undergoing rapid ice melt?

💡 Explanation

When freshwater is introduced from ice melt, freshwater lens formation occurs because freshwater is less dense than saltwater, creating a stable layer that inhibits vertical mixing and deepwater formation, thereby slowing thermohaline circulation. Therefore reduced convection develops, rather than albedo changes, productivity limitations, or expansion effects, all requiring alternative conditions.

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