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American Focus > Blog > Tech and Science > Earth’s ancient ‘greenhouse’ conditions were hotter than thought
Tech and Science

Earth’s ancient ‘greenhouse’ conditions were hotter than thought

Last updated: September 19, 2024 3:01 pm
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Earth’s ancient ‘greenhouse’ conditions were hotter than thought
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The Phanerozoic Eon, spanning over the past 541 million years, has seen significant fluctuations in Earth’s temperatures. Previous reconstructions based on computer simulations have reported a range of temperatures from 14° C to 26° C during this period. Surprisingly, these temperature shifts closely align with changes in atmospheric carbon dioxide levels, surpassing the influence of other factors such as variations in solar irradiance.

In a recent study conducted by researchers at the Smithsonian National Museum of Natural History, a new timeline for the Phanerozoic Eon was established. However, a puzzling inconsistency arose when comparing temperature estimates from various methods. It was discovered that previous reconstructions consistently underestimated the warmth of past periods, particularly in Earth’s tropics.

These new reconstructions not only shed light on past climate conditions but also provide context for the current global warming trend. With the planet’s average temperature currently standing at around 15° C, it is considered to be in a relatively cooler icehouse state. Despite this, the rapid pace of human-induced climate change remains a pressing concern.

Paleoclimatologist Emily Judd emphasizes the urgency of addressing climate change, highlighting the importance of considering the rate at which CO2 levels and temperatures are changing. While Earth’s ecosystems have shown resilience to gradual shifts, abrupt changes pose a significant threat to biodiversity, including human populations.

The rapid warming observed in the past 2,000 years raises concerns about the ability of organisms, including humans, to adapt to such swift environmental shifts. As creatures adapted to colder conditions and residing primarily at sea level, humans face challenges in coping with the escalating impacts of climate change.

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In conclusion, the study of Earth’s past temperatures offers valuable insights into the dynamics of climate change and underscores the need for proactive measures to mitigate its consequences. By understanding the lessons of the past, we can better prepare for the challenges of the future and strive towards a more sustainable coexistence with our planet.

TAGGED:AncientConditionsEarthsGreenhousehotterthought
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