The Earth has already experienced a sharp rise in temperatures during global warming

Scientists are interested in how periods of sharp warming and cooling of the climate on Earth affected

fluctuations in temperatures in subsequent eras. This is necessary in order to understand how the current global warming will affect the planet's climate in the long term.

The authors of the new work have collected information aboutsedimentary rocks that accumulated at the bottom of the oceans in the past several tens of millions of years, and measured the proportion of carbon and oxygen isotopes in their different layers in order to understand at what temperature these deposits appeared.

Based on these data, the scientists found out how much the temperatures increased and decreased after each episode of a sharp cold snap or warming of the climate, and compared these data with each other.

The northern polar cap may disappear inthe coming decades and centuries. Our observations and calculations show that this will make the planet's climate much more vulnerable to extremely long episodes of sharp temperature rises, the analogues of which we found in the recent geological past of the Earth.

Konstantin Arnscheidt, noted one of the study authors

Based on the results of the work, the authors found that in the past, most often there was a sharp rise in temperature: it increased the likelihood of additional bursts of global warming.

The authors suggest that such undulatingclimate changes were caused by changes in the nature of the Earth's orbit and various biological processes, for example, the decomposition of organic matter in thawed permafrost, which provoked previous episodes of temperature increases.

The authors noted that the progression of current global warming will entail a repeat of similar temperature extremes in the future.

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