Which mechanism causes thermohaline circulation slowdown in a freshwater glacial lake emptying into the North Atlantic?

💡 Explanation

When a large freshwater lake empties into the North Atlantic, dilution of surface water occurs because the influx of freshwater drastically lowers the density of the seawater, inhibiting the sinking of cold, salty water which drives thermohaline circulation. Therefore, limited sinking results, rather than convection, mixing, or sea ice impacts, which involve altered salinity or stratification conditions.

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