The world's southernmost ocean emitted carbon dioxide into the air, resulting in an increase in CO2 that produced warmer climates. This, according to researchers, led to the emergence of human civilizations. ( Martin Fuchs )
A leak in the biological pump could have resulted in atmospheric carbon dioxide levels rising thousands of years ago, resulting in a warm, human civilization-friendly time.
An international team of researchers found that the main upwelling that takes place in the Southern Antarctic Ocean is responsible for releasing carbon dioxide into the air. This heats the planet and stabilizes the planet 1
The results reveal new insights into climate change research and its effects on ocean circulation and carbon dioxide prediction
Southern ocean releases CO2
On a large geological scale, the world's oceans are the largest Storage for carbon dioxide. However, a team of geologists at Princeton University and the Max Planck Institute for Chemistry in Mainz has found that parts of the ocean allow carbon dioxide to escape into the atmosphere.
Experts have long suggested theories for a carbon dioxide increase. This led to the emergence of human civilizations, but could not provide direct evidence.
In a recent work published in Nature Geoscience Princeton Professor of Geological and Geophysical Science, Daniel Sigman, said activity in the depths of the world's southernmost ocean could have led to civilization ,
The researchers say that the cold deep waters of the Southern Ocean rise to the surface, causing a leak in the biological pump that dissipates more carbon dioxide into the atmosphere. This resulted in a warmer and more stable climate during the Holocene, a geological period that occurred 10,000 years ago until the Industrial Revolution.
"This process allows some of this deeply stored carbon dioxide to penetrate back into the atmosphere," says Sigman. "We essentially drill holes in the membrane of the biological pump."
What made the Holocene stable?
Phytoplankton, which grows in the oceans and sinks to the bottom, pumps carbon dioxide into the deeper waters. The scientists call this the biological pump, which is best known in the oceans in the lower latitudes.
However, the biological pump weakens closer to the poles. In the South Ocean, the pump has a huge leak that released significant amounts of carbon dioxide into the air during the Holocene.
Experts have long known that the Holocene was crucial to human civilization. The period is one of the rare interglacials, an interval between the ice ages of the last millions of years.
Unlike other interglacials, however, the Holocene was unusually stable. Glaciers retreated and formed a huge land area for human settlements. The increase in carbon dioxide in the atmosphere also enriched agriculture and enabled people to abandon their hunting habits and live in more permanent areas.
The carbon dioxide content during the Holocene increased by 20 parts per million from 260 to 280 ppm. By comparison, the current atmospheric carbon dioxide level is 400 ppm, an excessive increase due to the burning of fossil fuels.
It's unclear what caused the boosting wave in the Southern Ocean, but researchers believe that this was caused by changes in the east-waving winds around the Antarctic
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