Which risk increases when increased glacial melt leads to decreased salinity in North Atlantic gyre surface waters?

💡 Explanation

When glacial melt decreases surface salinity, reduced density contrasts decreases water sinking because density gradients drive thermohaline circulation, leading to weakening of the overall circulation pattern. Therefore thermohaline circulation weakening results, rather than intensified upwelling, sea ice expansion, or current strengthening which require salinity increases.

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