In about twelve years, the Earth's climate will be similar to that of the middle Pleiocene, a period in which the beginning can be traced More than 3 million years, According to a new study by American and British scientists.
In particular, the paper warns that if humanity does not reduce greenhouse gas emissions by 2150, the climate on Earth can be compared to that of the Eocene period, 50 million years ago, when the temperature was It was 13 degrees higher and there was hardly any ice.
"We are moving towards very dramatic changes in a very short period of time, Trend reversal "He warns Johnson, a professor of geography at the University of Wisconsin at Madison, in the United States. If we think about the future in terms of the past, we will turn Unresolved territory For human society, "he adds.
Rise of 13 degrees to 2150?
The researchers examined the similarities between Future climate projections Which were exposed in the fifth report of the Intergovernmental Panel on Climate Change and various periods of geological history, such as the early Eocene, the Middle Pliocene, the last interglacial (129,000-116,000 years ago), the Middle Holocene (6,000 years ago), the pre- (Before 1850 CE) and the beginning of the twentieth century.
They are also used in a representative concentration track 8.5. (RCP8.5), representing a future climate scenario in which We do not facilitate emissions Of greenhouse gases, and RCP4.5, a scenario in which humanity moderately reduces greenhouse gas emissions.
Both Earth's climate projections are more similar to the Pliocene medium In 2030 (Under RCP8.5) Or in 2040 (Under RCP4.5). However, in a longer period of time and in the RCP8.5 scenario, the weather continues to warm up until it begins to resemble Oceanic in 2100,Achieve greater similarity with this period for the year 2150.
The Pleiocene had temperatures 1.8 and 3.6 degrees Higher than now, while during Eocene temperatures were averaging Up to 13 degrees higher. Scientists also point out that all species on the planet had ancestors who survived the Eocene and Pleiocene, although it remains to be seen whether humans and plants and animals would fit in with these rapid changes.