Question

modeling and simulating the effects of prevailing winds
homework
(amplify 3.2 x 3.3)
reading: \deep ocean currents: driven by density\
directions: you have learned a lot about how wind and energy affect ocean currents. to learn
more about ocean currents, read and annotate the article \deep ocean currents: driven by
density.\ then, answer the questions below.

1. what causes the movement of deep ocean currents?

1. how does water sink to the bottom of the ocean and then rise to the surface again?

1. what is the global conveyor belt and why is it important?

1. what does density have to do with ocean water becoming salty ?

Explanation:

These questions are about deep ocean currents, which falls under the subfield of Geography (a subfield of Natural Science) as it deals with oceanic processes and Earth's physical systems. To answer, we rely on knowledge of oceanography:

1. Deep ocean currents are caused by differences in water density (due to temperature and salinity variations), known as thermohaline circulation.
2. Water sinks when it becomes denser (colder, saltier) and rises when less dense (warmer, less salty) due to density-driven convection.
3. The global conveyor belt is a large - scale ocean circulation driven by density, distributing heat, nutrients, and regulating climate.
4. Saltier water is denser (since salt adds mass), so salinity increases density, driving deep - water movement.

Answer:

s:

1. The movement of deep ocean currents is caused by differences in water density, which result from variations in temperature (thermo -) and salinity (haline), a process known as thermohaline circulation.
2. Water sinks to the bottom of the ocean when it becomes denser (usually due to being colder and saltier, for example, in polar regions where water freezes and leaves salt behind, increasing salinity). It rises to the surface again when it becomes less dense, often due to being warmed or diluted by freshwater input (like from rivers or melting ice), causing a convection - like process driven by density differences.
3. The global conveyor belt is a large - scale, slow - moving ocean circulation system driven by density differences (thermohaline circulation). It is important because it helps distribute heat around the globe, influences climate patterns, transports nutrients for marine ecosystems, and regulates the Earth's climate system by moving warm water from the equator towards the poles and cold water from the poles towards the equator.
4. When ocean water becomes saltier, its density increases (because dissolved salts add mass to the water without a proportional increase in volume). Higher - density water is more likely to sink, which is a key factor in driving deep - ocean currents (thermohaline circulation). So, salinity (and the resulting density changes) is a major driver of deep - ocean current movement, and the process of water becoming salty contributes to the density differences that power these currents.