Which Way Does Water Flow in the Bosphorus?

The Bosphorus, also known as the Strait of Istanbul, is a waterway that cuts through Istanbul, Turkey, connects the the Black Sea with the Sea of Marmara, and separates Europe from Asia. That’s a lot to ask of a small strait. It forms a historically important trade route for international navigation. But it’s not a river. At least, not all of it is. The water flows both north and south, depending on the depth.

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…in modern times, local boatmen know that the surface current flows south into the Sea of Marmara and thence into the Aegean/Mediterranean.  If they want to take a boat north, they can lower a bucket of rocks on a long rope to the bottom, where the northward current of seawater is located; it will carry the bucket north and thus tow their boat on the surface.

There’s a scientific explanation at Wikipedia. Read how a horrific event in history took advantage of this weird flow at TYWKIWDBI.

(Image credit: NASA Earth Observatory)

Source: neatorama

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