Which process drives the global thermohaline circulation in Earth's oceans?

💡 Explanation

When water masses vary in density due to temperature and salinity, convection occurs because denser water sinks and less dense water rises, driving a global circulation pattern. Therefore density differences are the cause, rather than wind, tides, or seismic activity influencing currents in this context.

• Which atmospheric phenomenon results when Coriolis force deflects geostrophic winds around a high-pressure system at altitude?
• Which effect primarily governs sediment transport direction during glacial retreat?
• Which phenomenon frequently results when tectonic plates slide past each other along a transform fault?
• Which risk increases when rapid snowmelt significantly raises water levels against a levee system protecting a floodplain?
• Which mechanism limits biological productivity in stagnant, deep ocean basins cut off from surface circulation?
• Which process causes a deep-water trench where an oceanic plate subducts under a continental plate?