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← GeographyWhich mechanism affects regional climate when thermohaline circulation weakens in the North Atlantic?
A)Reduced poleward heat transport impacting temperatures✓
B)Increased salinity gradient triggering coastal erosion
C)Enhanced equatorial upwelling creating productive fisheries
D)Intensified ozone depletion amplifying radiative forcing
💡 Explanation
When thermohaline circulation weakens, reduced poleward heat transport occurs because the density-driven flow transporting warm surface water northward slows, altering regional energy balance and thus impacting temperatures. Therefore, decreased poleward heating results, rather than salinity changes or ozone depletion, which depend on different mechanisms.
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