Quarky Explores Istanbul
Can water flow two ways at once?
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The story
Quarky dives into the Bosphorus and finds two currents stacked like a sandwich. Lighter, less salty water slides one way on top while heavier, saltier water creeps the other way underneath, because saltier water is denser and sinks.
What you'll learn
- Salty water is denser and heavier than fresh water, so it sinks below it.
- The Bosphorus has two currents flowing in opposite directions at different depths.
- Density differences drive currents all over the world's oceans.
- Quarky takeaway: what you see on the surface is not the whole story.
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