According tomedia reports, it is well known that the current concentration of carbon dioxide in the atmosphere is the highest in a long time. According to a new study of fossil plant materials, today’s atmospheric carbon dioxide concentrations are higher than the previous record of 23 million years and have never soared so fast.
Recently, the concentration of carbon dioxide in our atmosphere has been at a high rate. In 2016, Antarctica became the last region on Earth with a concentration of more than 400 ppm. In May 2019, data from the Monaroa Observatory in Hawaii revealed a record carbon dioxide concentration of 415.26 ppm. At present, this concentration is the highest in human history.
Higher carbon dioxide concentrations are linked to climate change and all possible damage. Long-term studies have shown that since the beginning of the 19th century, carbon dioxide concentrations have risen sharply — and “happened” around the industrial revolution. Our direct records date back hundreds of years, but before that, the situation has become blurred. The ice core sidonted gave us a glimpse of what was 2.7 million years ago — unfortunately, it was found that the concentration was less than 300 ppm.
In the new study, researchers at Louisiana State University looked further afield, extending the time to 23 million years ago. The team achieved this by studying the fossil remains of ancient plants. As plants grow, they absorb carbon dioxide from the atmosphere, and their tissues retain certain stable carbon isotopes — especially carbon-12 and carbon-13. When these plants become fossilized, scientists can study the levels of these isotopes and determine the amount of carbon dioxide that plants grow.
Using this method, the researchers found that most of the carbon dioxide concentrations fluctuated between 230 ppm and 350 ppm over the course of 23 million years. This is far below the modern level. The team also found no dramatic increases during this period as the climbs we are experiencing now. To make matters worse, the most dramatic warming events in the past 23 million years have been associated with a relatively small increase in carbon dioxide concentrations. This includes the mid-New World, which occurred between 15 and 17 million years ago, and the mid-New World, which occurred 3 to 5 million years ago.
The new study is further evidence of the seriousness of the challenges facing humanity today.
The study was published in the journal Geology.