Why is the Black Sea, an inland sea, called the Black Sea?

In the middle of the Eurasian continent there is a sea called the Black Sea, and many people in the world even call this sea the most terrifying ocean, because it is very closed and there is a lack of oxygen. But the waters of this sea are so clear that many people wonder why it was named the Black Sea. In fact, the name of the Black Sea is also taken according to the color of this sea, which means that the overall color of the Black Sea is black, although the water above is very clear, but the bottom of the sea is black, and when you look down from the sky, it is also black.

The Black Sea seems to be a sea blessed by the heavens, and the annual precipitation is very high, which means that the salt content of the surface of the sea is very low. There is actually a connection between the Black Sea and the Mediterranean Sea, and there is a small mouth called the Turkish Strait. Because the distance of this strait is relatively narrow, about 700 meters wide and about 33 meters deep, it is difficult to replace a large amount of seawater in the Black Sea.

As a result, the surface of the Black Sea and the deep layers of the sea water have a very large difference in salinity, the water above flows very fast, while the water at the bottom flows more slowly, becoming a double sea. <>

The Black Sea is almost completely isolated from the outside world below 200 meters, and oxygen is blocked, so the Black Sea is very oxygen-deficient. There are a lot of sulfidating bacteria near the Black Sea, which break down organic matter on the ocean floor and turn it into hydrogen sulfide. The color of hydrogen sulfide is black, and when it is mixed with the sediment on the seabed, the Black Sea will be black as a whole.

Maybe many people don't know what hydrogen sulfide is, hydrogen sulfide tastes like eggs, smells like rotten, and also smells like rotten meat, and hydrogen sulfide is toxic and explosive. In other words, the Black Sea below 150 meters is full of toxic gases, so there is no trace of life near the Black Sea, but there are many anaerobic bacteria. The hydrogen sulfide here is very unfriendly to any living being, as long as it is inhaled by humans or in contact with **, it will be poisoned, and then humans will have consciousness disorders or internal organ problems, and their lives will be in danger for about half an hour.

Although the Black Sea is terrifying, it is not absolute, it is deserted, and many people still visit the coast every year.

Because this is a very scary ocean, although the sea water is crystal clear, but the annual precipitation of this ocean is very large, resulting in a very low salt content of the surface seawater, resulting in a density leap layer, these sea areas have been in a state of lack of oxygen, and there are many dangerous things in the sea area.

The reason why the Black Sea is called the Black Sea is because the name of the Black Sea first came from ancient Greece, and the Greeks believed that the Black Sea was the "center of world civilization", so it was called the Dark and Dull Sea in Greek, and the subsequent nomads also followed the name of the Black Sea; Nowadays, it is also believed that the Black Sea got its name from the dark and stormy water. ”

Although the surface of the Black Sea is clear, the bottom is actually black, so everyone calls it the Black Sea.

Black SeaIt is a double-layered sea, and the upper water mostly comes fromDanubeThe infusion of river water such as the Don River, and the deep water is born in the sea basin of the ancient Mediterranean, so the salinity is very high and the density is very high, which makes it difficult for the upper and lower water bodies to communicate thoroughly.

The Black Sea was originally a basin of the ancient Mediterranean, but later it was gradually separated from the open sea through crustal changes, and finally formed an inland sea.

Freshwater in the upper part of the Black Sea comes mainly from the Danube, plus precipitation.

This creates an upper freshwater layer with a lower salinity content. Because of the low salinity of the surface layer, a fault is formed with the seabed, also known as the density leap layer, which seriously blocks the water exchange between the upper and lower layers, and there is no oxygen without exchange, and the bottom of the sea is dead silent.

Marine resources

The Black Sea covers an area of 420,300 km and is 1,180 km long from east to west from the Crimean peninsula.

The southern rim to the southern coast of the Black Sea, the Black Sea Mountains, and the western shore to the Bosphorus.

The nearby mountains are slightly flat, with the Eastranja Mountains to the southwest, the Danube Delta to the north, the low-lying coast to the northwest and north, and the Crimean Mountains to the south.

Coastal continental shelf.

The area only accounts for 25% of the entire water area, and the area of the forest occupies 25% of the entire water area of Ludumu through the continental slope to the submarine basin. The basin has a flat bottom and gradually deepens towards the center, reaching a maximum depth of more than 2,200 meters.

Black SeaIt is a double-layered deep water due to the origin of the ancient Mediterranean Sea basin.

The Black Sea is a double-layered sea, and most of the upper water comes from the Danube.

The infusion of river water such as the Don River, and the deep water is born in the sea basin of the ancient Mediterranean, so the salinity is very high and the density is very high, which makes it difficult for the upper and lower water bodies to communicate thoroughly. The Black Sea was originally a basin in the ancient Mediterranean, but was gradually separated from the open sea after the earth's crust was turned into a potato, and finally formed an inland sea.

Features of the Black Sea:The Black Sea is one of the deepest inland seas in the world. The Black Sea itself is very deep, and the water flowing from rivers and the Mediterranean Sea from the Black Sea is less salinity and therefore lighter, and they float on waters with high salinity.

In this way, there is no communication between deep and shallow water, and there is a dead silence on the seabed.

Not only is it dead silent, it's also very dark. Because of the lack of oxygen in the deep seawater, it becomes an anaerobic bacteria.

of the world. Anaerobic bacteria work diligently in the deep sea, releasing large amounts of hydrogen sulfide.

The gas, the highly toxic sulfur hydrogen that not only kills all marine life, but also makes the water black.

Be.

The Black Sea is an inland sea between Europe and Asia, with an area of about 10,000 square kilometers overflowing from the narrow Bosphorus Strait.

The Black Sea is connected to the Mediterranean Sea by the Turkish Strait. The Danube and Dnieper, important rivers that flow into the Black Sea, are coastal countries such as Turkey, Bulgaria, Romania, Ukraine, Russia and Georgia.

Important coastal cities include Sochi, Istanbul, Burgas, Varna, Constanta, Turkia, Odessa, Sevastopol, Batumi, etc.

The Black Sea is one of the deepest inland seas in the world.

The Black Sea itself is deep, and the water flowing from rivers and the Mediterranean Sea from the Black Sea has a relatively low salinity and is therefore lighter, floating on waters with high salinity.

The junction of two layers of water is located between 100 and 150 meters deep, and it takes thousands of years for the two layers of water to fully communicate with each other.

A river found on the bottom of the Black Sea is locally 35 meters (115 feet) deep and 804 meters (half a mile) wide.

Researchers at the University of Leeds, who used a remotely operated submarine to scan the seabed near Turkey, noted that the river is 350 times larger than the Thames and carries high concentrations of salt water and sediment.

It is the only active underground river discovered so far, with highly saline water overflowing from the Mediterranean Sea through the Persphorus into the Black Sea (with lower salinity).

The "Black Sea" was named because it looked so black.

If you're lucky enough to sit down on a boat and swim on the Black Sea, and you're not seeing blue waters, you're just black ones, why is that? The name "Black Sea" is derived from ancient Greek explorers who felt that the Black Sea waters were darker than those of the Mediterranean.

The Black Sea is a deep-sea system with a large total area and insufficient oxygen. The Black Sea itself is very deep, and the water pumped from rivers and the Mediterranean Sea is less salinity and therefore lighter, and they float on waters with high salinity. There is no communication between the deep and shallow waters.

The confluence of the double layer of water sits in the middle of the deepest depths of 100 to 150 meters.

It takes thousands of years for the middle of the double layer of water to communicate completely. The O2 used to decompose and dissolve the remains of creatures in the deep sea is not replaced. In this severe oxygen deficiency, only anaerobic microorganisms can survive.

Their basal metabolism releases carbon dioxide and harmful hydrogen sulfide (H2S). All other creatures actually live in water at depths of 200 meters1.

In fact, this is also due to the unique geography of the Black Sea. Although the waters of the Black Sea are very wide, there is only one place where it comes out of the Mediterranean Sea, which is known as the Turkish Strait. The Turkish Straits are very narrow, with the thinnest area being only 700 meters wide and the shallower part being only 33 meters deep.

Such a narrow strait has prevented the exchange of seawater in the Black Sea, and it is impossible to obtain many exchanges at once.

In addition, the relative density of the surface of the Black Sea is small due to the addition of many freshwater rivers such as the Don River, the Dnieper River, and the Danube, while the deep seawater is harmed by high salinity seawater, and the relative density is higher. In this way, the relative density of the seawater is small at the top and large at the bottom, which makes the seawater lie quietly and remain motionless for the next 200 meters, completely blocking it from the outside, and there is no abundant O2 at all.

Under the extreme lack of oxygen in the seawater, the vulcanized rubber bacteria in the water gradually become active, dissolving many substances in the deep sea and producing hydrogen sulfide. Eventually, more and more hydrogen sulfide stained the sludge of the deep sea black. The water you see is black.

However, if we scoop a scoop of seawater at sea level, we will find that the water is not dark. This also leads to a unique scenery of the Black Sea with a black face instead of a black heart.

It's not that the water is very black, but from the outside, the water in this place is black, so it is called so, and the location of the Black Sea is in the southeast of Europe.

Because the Black Sea looks like a black patch, it is named the Black Sea; Its water is darker; The North Sea is an intercontinental sea in southeastern Europe and the peninsula of Asia Minor in Asia.

Yes, it is located on the dividing line between Asia and Europe, and the geographical location here is very special, and the oxygen concentration here is not enough, so this situation occurs.

Black SeaIt is a double-layered deep sea due to the origin of the waterAncient Mediterraneanof the sea basin. The Black Sea was originally a basin of the ancient Mediterranean, but after crustal changes, it was gradually separated from the open sea, and finally formed oneInland Sea

Since the salinity of the Black Sea is less than that of the Mediterranean, there is a special phenomenon of water exchange, that is, the surface of the 10 20 m water flows to the Mediterranean Sea and the bottom water flows to the Black Sea. The strait is navigable all year round.

Hydrological characteristics. The Black Sea region receives 600,800 mm of annual precipitation and is home to runoff from some of Europe's larger rivers, with an average annual inflow of 35.5 billion cubic metres (including the Danube).

60%), the sum of these freshwater amounts far exceeds the evaporation of the sea surface, desalination of the salinity of the surface seawater, resulting in an average salinity of only 12 22. The salinity of the surface layer is small, and a density leap layer is formed between the upper and lower water layers, which seriously prevents the exchange of the upper and lower water layers, and the deep sea water is seriously hypoxic.

After anaerobic bacteria.

The sulfate in seawater decomposes to form highly toxic hydrogen sulfide.

etc., toxic to fish. The Black Sea is also the only double-layered sea on Earth. A large number of sturgeon are produced on the surface of the upper Black Sea.

Mackerel and anchovies. By the late 20th century, industrial and municipal waste brought by the Danube, Niper and other rivers that emptied into the Black Sea increased the pollution layer of the sea and reduced the number of fish in the sea.

The Black Sea is an inland sea.

The Black Sea is an inland sea between Europe and Asia, which is inland, and its waters are overflowed by the narrow Bospro Strait and cover an area of about 10,000 square kilometers.

The Black Sea is connected to the Mediterranean Sea by the Turkish Strait. Important rivers that flow into the Black Sea, the Danube and the Dnieper. The coastal states are Turkey, Bulgaria, Romania, Ukraine, Russia and Georgia.

Sea quality characteristics of the Black Sea:

The Black Sea is one of the deepest inland seas in the world. The Black Sea itself is deep, and the water flowing from rivers and the Mediterranean Sea from the Black Sea is less salinity and therefore lighter, and they float on waters with high salinity. In this way, there is no communication between deep and shallow water.

The junction of the two layers of water lies between 100 and 150 meters deep. It takes thousands of years for two layers of water to communicate with each other thoroughly.

The oxygen consumed by the decay and decomposition of the corpses of organisms on the seabed is not replenished. In this severely hypoxic environment, only anaerobic microorganisms can survive. Their metabolism releases carbon dioxide and toxic hydrogen sulfide.

Other creatures can actually only survive in water at depths of more than 200 meters.