The researchers gave a new explanation why every 100,000 years our planet lived in the Ice Age.
This mysterious phenomenon, termed the '100,000 year old problem', takes place over a million years and causes a great deal of ice in North America, Europe and Asia. So far this has not been explained by researchers.
More than a million years ago, our planet's glacier ages are every 40,000 years, and during these times there were colder summers. At a point called 'the Central Pleistocene Transformation', about a million years ago, a change occurred every 100,000 years, when the age of the glacier, which lived every 40,000 years, began to change every 100,000 years, while scientists could explain this change because the world's seasons changed predictably
According to a new study published in the journal Geology, the ocean absorbing atmospheric carbon dioxide (CO 2 ) may be responsible for this change.
Exploring the chemical components of small fossils on the ocean floor, researchers have discovered that more carbon dioxide is stored deep in the oceans during the glacial ages, which occur every 100,000 years.
This shows that at this time more carbon dioxide is being taken from the atmosphere into the ocean. As a result, the average temperature of the world falls and the northern hemisphere is covered with large ice layers.
Professor Carrie Lear from the head of the research professor at the Faculty of Earth and Ocean Sciences says: "We can think of the ocean as breathing and giving away carbon dioxide. Hence, the ice layers are drawn into the ocean from the atmosphere of the larger ocean, causing the planet to cool down. When the ice layers shrank, the oceans gave carbon dioxide to the atmosphere, causing carbon dioxide in the atmosphere to rise and cause the planet to heat up. "
"When we look at the fossils of small creatures on the ocean floor, we see that the ice sheets breathe more carbon dioxide in colder climates every 100,000 years and as the ocean recovers every 100,000 years, it shows less carbon dioxide remaining in the atmosphere."
Seaweeds play an important role in the removal of carbon dioxide from the atmosphere since they are photosynthesis and because carbon dioxide is one of the essential components of photosynthesis.
With the upward flow from the ocean floor, carbon dioxide reaches the surface and mixes with the atmosphere. However, the presence of sea ice in large quantities can prevent the release of carbon dioxide, making the ice layers larger and causing the glacial age to lengthen.
Prof. Lear "If we continue with the metaphor of carbon dioxide dioxide breathing, we can think of gigantic ice masses as a giant, sweet-brewing confection. Such a mass of ice will remain like a cover over the ocean. "
The climate of the world is now in a temperate phase between two glaciers. The end of the last glacier ended about 11,000 years ago. Since then the sea level has risen and the ice masses have been pulled up to the poles. In addition to these natural cycles, the release of carbon dioxide, which is caused by humans, is also responsible for the warming of the climate.
Science Daily. October 26, 2016.
Article : Lear, C. H., Billups, K., Rickaby, R. E., Diester-Haass, L., Mawbey, E. M., & Sosdian, S. M. (2016). Breathing more deeply: Deep ocean carbon storage during the mid-Pleistocene climate transition. Geology, 44 (12), 1035-1038.