Which outcome results when freshwater lenses disrupt oceanic gyre rotation?

💡 Explanation

Reduced gyre rotation reduces surface water divergence; this suppresses upwelling because Ekman transport is weakened; therefore, fewer nutrients reach the surface, rather than enhanced processes which require stronger currents or vertical mixing.

• Which risk increases when increased glacial melt leads to decreased salinity in North Atlantic gyre surface waters?
• Which consequence results when eolian transport bypasses a small upwind island?
• Which consequence results when a subducting oceanic plate experiences dehydration?
• Which risk increases when freeze-thaw weakens slope supports?
• Which outcome develops when longshore currents encounter a headland?
• Which phenomenon diminishes the Coriolis effect at low latitudes near the equator?