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← GeographyWhich outcome occurs when cold fresh meltwater enters oceanic currents in polar regions?
A)Temperature stratification disruption and convection halting✓
B)Strengthened thermohaline circulation and salinity increase
C)Increased CO2 absorption from surface waters
D)Enhanced nutrient upwelling and fisheries production
💡 Explanation
The introduction of meltwater reduces surface water density because freshwater is less dense and cooler; therefore, buoyancy-driven TURNOVER slows or stops, rather than increasing, due to salinity gradients being unable to drive convection. This stratification affects nutrient distribution.
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