Which mechanism reduces surface salinity in North Atlantic Deep Water formation zones?

💡 Explanation

When glacial meltwater discharge increases, freshwater input overrides saline conditions because freshwater is less dense, inhibiting deep water convection and stratification processes. Increased glacial meltwater runoff therefore reduces surface salinity, rather than evaporation, venting, or deposition which increase salinity or introduce different chemicals altogether.

• Which risk increases when an oxbow lake forms close to agricultural land?
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