A new study shows that the reversal of the Earth’s magnetic poles between 42,000 and 41,000 years ago could lead to an environmental crisis, leading to mass extinctions.This period is called Study on the visit and use of Laschamps Obtain precise carbon dating from ancient tree fossils to study its role.
The research team detailed how they created an accurate radiocarbon record at the time when the Laschamps geomagnetic reversal from the ring of New Zealand swamp kauri trees was reversed approximately 41,000 years ago.
“This record shows that the carbon-14 content in the atmosphere, which eventually reaches the highest concentration, increases significantly during the period of the weakening of the magnetic field before the polarity switch.”
The researchers also emphasized that this is a similar study to determine the link between polarity reversal and environmental changes. To conduct research, Cooper and his team used cross-sections of four ancient trees recovered from the swamps of Ngāwhā Springs in northern New Zealand and tested their carbon-14.
The research team then simulated how the changing magnetic field affects atmospheric weather patterns. Their results showed that an increase in the amount of charged particles entering the atmosphere would also lead to an increase in the production of hydrogen and nitrogen oxides in the atmosphere.
These molecules will deplete ozone and prevent stratospheric ozone from shielding the inhabitants of the earth from ultraviolet radiation. These changes will also disrupt the absorption of sunlight in different layers of the atmosphere, leading to massive cooling of the planet.
However, although this study is generally interesting and reasonable, researchers rely too much on hypotheses. It seems that they are looking for everything that happened 42,000 years ago that might be related to changes in environmental conditions.
Finally, what happened 42,000 years ago is still unknown. But this work may inspire more research to study the principles of these mass extinctions.The research was published in the journal science.
Disclaimer: This article has been updated to reflect the limitations of the research and its conclusions.