Question

Deep-ocean currents are driven by differences in the

• A. water temperature
• B. water type
• C. water concentration
• D. water source

Hint:

• Deep-ocean currents are driven by thermohaline circulation.
• "Thermo" refers to temperature, and "haline" refers to salinity.
• Differences in water temperature and salinity cause differences in water density.
• Denser water (cold and/or salty) sinks and flows along the ocean bottom, while less dense water rises. This creates the deep-ocean currents.
• Polar regions are key areas for the formation of dense deep water.

Answer 1

The Correct Option is A

Deep-ocean currents, also known as thermohaline circulation, are primarily driven by differences in water temperature and salinity. This phenomenon is part of the global ocean conveyor belt, which plays a crucial role in regulating the Earth's climate. Let's explore how water temperature influences these currents:

• Water Temperature: Temperature differences lead to variations in water density. Colder water is denser than warmer water, causing it to sink. This sinking motion is a key driver of deep-ocean currents. As the cold, dense water moves along the ocean floor, it pushes warmer, less dense water upwards, creating a continuous flow and circulation pattern.

Therefore, water temperature is the correct factor influencing deep-ocean currents, as it directly affects water density and the movement of oceanic waters across the globe.