Which mechanism reduces surface salinity in high-latitude oceans when warming temperatures accelerate glacial meltwater outflow?

💡 Explanation

When glacial meltwater increases, low-salinity water forms a density gradient at the surface suppressing mixing because freshwater is less dense than saltwater, inhibiting deep water formation. Therefore, density stratification impedes vertical mixing, rather than increased salinity, intensified downwelling, or stronger thermohaline circulation which require cooling or salinity changes.

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