We, the people, officially entering upon unexplored territory.
At approximately 2.5 million years our species never lived in this kind of atmosphere of the Earth.
New research on the ancient soil now confirmed that the level of carbon dioxide in the past 60 years is the highest that we have ever experienced in the history of mankind.
In the past 60 years, the findings show that our planet for the first time reached 415 ppm in 2.5 million years. –
According to this survey, the first Homo erectus, which dates back 2.1 to 1.8 million years, until 1965, the man lived in an environment with low levels of carbon dioxide – said the geo-scholar Jige Zhang of Texas A & M University.
– This environment with high levels of carbon dioxide not only an experiment on the climate and the natural environment, but also an experiment for us.
To understand where we are going, we first need to know where we were.
The study of climate in the past can help us to provide a certain perspective and to navigate the uncertain future, said Zhang.
Since capturing small bubbles of air, ice cores often used by climate scientists as a record of historical levels of CO2 in the atmosphere of our planet.
But these samples are old hundreds of thousands of years, not millions. To dive deeper into the history of the country, Zhang and his colleagues turned to the soil.
As a natural part of the carbon cycle on Earth, when formed creates soil carbonates, and these tiny traces may be useful as indicators of past climates.
Analyzing carbonate in fossil soils of Loes Plateau in China, the team was able to reconstruct CO2 levels millions of years ago.
– The earliest identified dust on the plateau before 22 million years ago – says Zhang. The results of the plateau coincide with other estimates. However, Zhang and his team are unhappy.
They plan to refine their techniques for analyzing soil to improve their estimates, potentially using the technique on soils 23 million years old.
– The past is the key to our future.
The country has a long history and many things have changed. Paleoklimata is important for us to learn about the past and perhaps anticipate the future – says Zhang.