The Caspian Sea has been starting to start anew for 9 meters or more this century

Imagine that you are looking at the sea from the ocean. The 100 meters of barren sand in front of you looks like a beach with soft waves at the other end of the low tide and still no tide.

This is what we found when we visited the small port of Liman on the Caspian Sea coast of Azerbaijan. The Caspian is actually a lake, it is the largest in the world and it is falling sharply on its water level which is going to accelerate. At the end of the century will be the Caspian Sea Nine meters to 18 meters below. It is deeper than most houses.

This means that the lake will lose at least 25 percent of its previous size and reveal 93,000 square kilometers of dry land. If that new land were a country, it would be the size of Portugal.

The Caspian is about the borders of five countries and the size of Germany or Japan. Rener Lesniewski / Shutterstock

As we have found ourselves New research, This crisis could be the result of a waterfall several hundred kilometers east of the Aral Sea. The Caspian surface is already compressed 7 cm per year, Is likely to increase a trend.

In five years it is about 40 centimeters less than it is today and in ten years it may be about one meter less. Towards the end of the century, the world’s maritime countries are rising one meter or more above sea level. The Caspian Sea faces a drop of that size – stay alone for a decade.

Climate change is the culprit. The waters of the Caspian Sea are isolated and its surface is about 28 meters below the surface of the Earth’s oceans. Its level is how much water is flowing from the rivers, most of the powerful Volga is flowing north, how much rain is falling and how much evaporation is happening.

At the turn of the century, the Volga and other northern rivers still exist. However, an increase in temperature of about 3 to 4 K in this region will lead to evaporation. With roof.

Despite the crisis of the past, the misery of the future

The Caspian Sea has a history of violent ups and downs. The walls of the ancient city of Durbant on the banks of the river Caucasus in Russia testify to the depth of the sea in the Middle Ages. The Caspian was about 100 meters down about 10,000 meters ago. A few thousand years ago it was about 50 meters higher than it is today and it also spread to the Black Sea.

Map of the depths of the Caspian Sea: The red and yellow regions may disappear completely. Allahdadi et al (2004)

Yet the people living on the shore were able to overcome the waves. No human infrastructure was on the verge of collapsing, and many animal species moved above and below sea level, as they have for the past 2 million or more years. But this Time is different. This degradation will affect the unique and already stressful animal and plant life of the Caspians along the coast as well as human society.

In some areas, the beach is expected to recede hundreds of meters a year. Can you imagine the rapid construction of new hills and shelters? As soon as these are ready, the sea will move one kilometer or ten kilometers further. Coastal pruning will land soon. Today’s beaches will pick up sand stuck in yesterday’s barren plains.

The drop will also affect lower rivers and deltas around the Caspian Sea. Once the watermelon and paddy cultivation continues, the fertile land will become very dry.

Unique Caspian life endangered

The city of Ramsar on the coast of Iran has given a name Global Wetlands Convention. But as the sea recedes, the city is becoming landlocked and the surrounding wetlands will be destroyed even after decades.

A Turkmen stamp with a seal
Officially listed as endangered, Caspian seals have declined by more than 90% in the last century. Trishan pull / shutterstock

The shallow “shelves” of the northern and eastern Caspians provide staple food for fish and birds, yet the entire northern and eastern shelves will be transformed into arid wastelands. It will destroy fish species, Caspian seals and unique mollusks and crustacean species compared to the sea.

These Caspian inhabitants have already suffered badly in the last century Pollution, prey and invasive species. About 99 percent of the Caspian seal molasses grows in the winter snows of the northern Caspian. Yet the snow of winter and indeed the whole of the northern Caspian will disappear.

Deeply biodiversity hotspots remain 50 m and 150 m Rising temperatures and submerged nutrients in deeper and deeper channels will affect rivers. This will reduce oxygen levels and the development of habitatally dead areas could affect the remaining refugees of the Caspian species. A real ecology around the corner.

1995 and today showing the map of the Limon coastline of Azerbaijan.
Caspian beach has already been renovated. Frank Wessling / Google Earth, Author provided

The situation screams for action, but the possibilities are limited. The main driver of the climate situation is the Caspian crisis, with global CO2 levels rising only at the global disposal. In the Soviet era, it was proposed to deal with the narrow Aral Sea before large-scale water flows from Siberian rivers. But so much work – in the case of the Caspian Sea, A canal from the Black Sea Can be considered – bring huge environmental and geopolitical risks.

Yet steps are needed to protect the unique flora and fauna of the Caspian Sea and the livelihoods of the people around it. The small port of Limon gets stuck away from the sea every year. If no action is taken, it will be left alone in many ways.Gossip

Frank WeslingNaturalis Biodiversity Center, Veteran Researcher University of Utrecht And Matthew Lattuda, PhD Candidates, Department of Animal Environment and Systems, Jetsen University

Reprinted from this article Gossip Under the Creative Commons license. Then Original article.

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