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Microscopic fossils allow us to know how to combat global warming

Microscopic fossils reveal how ancient global warming events, linked to volcanic activity, help to understand current climate change....
Author: Patricia Alegsa
28-08-2024 17:34







  1. The Impact of Hyperthermal Periods on Current Climate Change
  2. The Relationship between Sea Temperatures and CO2
  3. Fossils as Indicators of Climate Change
  4. Lessons for the Future



The Impact of Hyperthermal Periods on Current Climate Change



A recent study reveals that the hyperthermal periods that occurred millions of years ago, particularly during the Paleocene and Eocene, offer valuable information to understand current climate change induced by human activity.

These events, characterized by dramatic increases in global temperatures, are linked to massive volcanic eruptions that released large amounts of carbon dioxide (CO2) into the atmosphere.

This knowledge is crucial for predicting the consequences of contemporary global warming.

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The Relationship between Sea Temperatures and CO2



The research published in the journal Proceedings of the National Academy of Sciences highlights the correlation between sea temperature and CO2 levels in the atmosphere.

During the Paleocene-Eocene Thermal Maximum (PETM) and Eocene 2 (ETM-2), significant increases in global average temperature were observed, resulting in the extinction of multiple species.

This study uses foraminiferal fossils to reconstruct the climatic conditions of the time, allowing scientists to establish patterns that could be repeated in the future.


Fossils as Indicators of Climate Change



Los foraminíferos, unicellular organisms that inhabited the oceans, have been fundamental in the research of past climate.

By analyzing the boron chemistry in their shells, scientists can infer atmospheric CO2 levels from millions of years ago.

According to Dustin Harper, the lead author of the study, “measuring the boron chemistry of the shells allows us to translate those values to past sea water conditions, providing a window into Earth’s climatic history.”


Lessons for the Future




Despite current CO2 emissions being 4 to 10 times faster than those released by volcanoes in the past, the total amount of greenhouse gases generated is comparable.

Understanding hyperthermal events of the past is essential to foresee the future of the climate and prepare humanity for imminent environmental changes.

Researchers like Harper emphasize the importance of studying these periods to identify how the Earth might respond to the accelerated release of carbon, which could have significant implications for our climate change mitigation strategies.






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