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← GeographyWhich outcome results when thermohaline circulation weakens near the Greenland ice sheet melt?
A)Strengthened ocean currents in tropics
B)Increased North Atlantic sea ice extent✓
C)Accelerated deep ocean nutrient cycling
D)More intense El Niño events offshore
💡 Explanation
When thermohaline circulation weakens, decreased density differences reduce the North Atlantic overturning because freshwater input from melting ice slows down the sinking of cold, saline water. Therefore, increased North Atlantic sea ice occurs, rather than strengthened tropical currents, deeper nutrient cycling, or El Niño intensification which require different ocean-atmosphere interaction scenarios.
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