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Scientists: The plague changed the Earth's atmosphere several centuries ago

2024-03-11 11:18:43Lifestyle SHKRUAR NGA REDAKSIA VOX

Scientists: The plague changed the Earth's atmosphere several centuries ago

Scientists have discovered a strange link in Antarctic ice between atmospheric carbon dioxide levels and past global pandemics that have lasted for centuries. Accordingly, ancient ice hides air bubbles that, like time capsules, contain tiny samples of gases from the atmosphere from thousands or even millions of years ago.

The best data for the last 2000 years come from two ice cores (Law Dome and WAIS Divide) that have had a major impact on climate modeling and carbon cycle analysis. About 2,000 years ago, great empires began to rise, Vesuvius erupted, and people were at war across Europe. Later, diseases such as plague and syphilis raged for centuries, decimating the human population.

Analyzes of the Law Dome and WAIS Divide ice cores show similar results, although there are some differences in their measurements of atmospheric CO2. For example, the Law Dome shows a rapid decline in CO2 levels over a 90-year period that culminated in 1610, after the effects of first contact between the Old and New Worlds, when many natives died of diseases brought to the Americas by Christopher Columbus.

The number of people in the area fell sharply, communities left previously inhabited areas, vegetation began to flourish again, and newly formed forests absorbed large amounts of CO2 from the atmosphere.

To examine these differences in more detail, British Antarctic paleoclimatologist Amy King and her colleagues measured CO2 levels in a separate ice core (Skytrain Ice Rise), drilled in 2018-2019, from the edge of the West Antarctic Ice Sheet. .

They analyzed parts of the Skytrain from a depth of 83.2 to 104 meters in order to get a picture of the gases created between 1454 and 1688. The results showed that CO2 levels actually fell during that period, possibly due to changes in large in the human population and the vegetation of the earth. However, even this decline was more gradual than that of the core of the Dome of the Law.

The study, titled "Ice Core CO2 Reconciliation and Land Use Change After New World-Old World Contact," was published in the journal Nature Communications.


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