Scientists surprised by world's 'great journey' of water

Researchers have learned how many years water from one place on Earth travels through the world's ocean basins. Nearly half the water in the Atlantic Ocean spends 1,000 years in the Pacific Ocean, and the entire "great journey," which also includes visits to the Indian and Southern Oceans, lasts nearly 3,000 years. Only after that does the water return back to the Atlantic.
Depending on the depth of the traveling waters and other factors, some of the water may return faster - after about 300 years, one-third returns.

"The Great Journey" of water has been studied in more detail by ocean scientists at the University of California, San Diego. Their study is the first to trace the trajectories of water using vast amounts of real data using computer simulations.

The journey of water over 2,800 years

Specifically, the ocean model includes more than one billion pieces of data from various sources, whether satellites or robotic free-floating floats. 
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Water is not only inextricably linked to the emergence of life on Earth, but also provided the conditions for its evolution. After all, about three billion years, life existed and evolved exclusively in the oceans, which would not have been, if the planet is not more or less stable climate. Moreover, even small amounts of water in the Earth's interior soften the rocks, a necessary condition for plate tectonics, which in turn is responsible for the shape of continents and oceans, earthquakes and volcanic activity-all of which have shaped our Earth. Despite the large role of water in the evolution of life and non-life on Earth, it is still not entirely clear where on Earth so much water comes from.

In the first few tens of millions of years of Earth's evolution, there was no place for liquid water on its surface. According to one hypothesis, water could have been brought to us by comets, but the isotopic composition of Earth and comet water is different. Another hypothesis says that water was released from the Earth's interior. But then the question arises how the primordial ocean could survive the turbulent first tens of millions of years in the history of the Earth, when it was incandescent, subjected to massive bombardment by asteroids and even collided with an ancient protoplanet. All these cataclysms should have melted the top few hundred kilometers of the Earth's crust and evaporated water from the surface of the planet forever.

But if water did hide somewhere deep inside the Earth, there must be a chemical substance capable of holding water molecules at high temperature and tremendous pressure for millions of years for a long time. And then release it in a calmer era.