Which process significantly weakens the Atlantic Meridional Overturning Circulation (AMOC) when Arctic ice melt accelerates?

💡 Explanation

When Arctic ice melt accelerates, increased freshwater input reduces the surface water density because freshwater is less dense than saltwater, hindering the sinking of cold, saline water in the North Atlantic that drives the AMOC. Therefore reduced density weakens the MOC, rather than albedo influencing solar absorption, methane release decreasing, or wave energy dissipation which influences climate or atmospheric pressure.

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