Home Top Stories Show That Reversal Of Magnetic Poles Can Lead To Severe Climate Change

Show That Reversal Of Magnetic Poles Can Lead To Severe Climate Change

- Advertisement -

Around 42,000 years ago, a reversal of the Earth’s magnetic poles caused major environmental changes, species extinction events, and long-term alterations in human behavior. These are the main conclusions of a study recently published in ‘Science’ and carried out by an international team of more than thirty researchers from institutions and universities on three continents under the direction of Alan Cooper, from the South Australian Museum in Adelaide.

The discovery was made possible thanks to the discovery of a huge 60-ton trunk of kauri (the largest tree species in New Zealand), 42,000 years old and preserved almost intact in a swamp. The tree’s rings indicate that it lived for 1,700 years and just at a time when the world, magnetically at least, was turned upside down. The information obtained from this “exceptional witness” raises important questions about the impact that pole reversals and “magnetic excursions” can have on the climate and the life forms that suffer them. “Before this work,” explains Chris Turney, one of the authors of the research, “we knew that 42,000 years ago a lot happened around the world, but we didn’t know exactly why. Now, for the first time, we have been able to accurately date what happened when the Earth’s magnetic fields were last reversed. ‘

Read More  Dragon Prince Season 4: Release Date, Cast, Plot And More Information

The magnetic field exists thanks to the flow of molten iron in the Earth’s outer core, which is prone to chaotic changes that not only weaken the field but also cause the poles to drift and sometimes completely reverse. The magnetic orientations of minerals in rocks record long-lasting reversals, but they cannot capture the details of a change that lasted only a few centuries, such as 42,000 years ago. In the geological record of our planet, there are numerous cases of magnetic inversion, episodes during which the magnetic poles ‘migrate’ from their usual positions and end up interchanging. If something like this happened today, it is quite possible that the event would wreak havoc on telecommunications networks and electronic equipment. But the environmental impact of such events was virtually unknown.

Read More  Ben Stokes's Father Died At Age 65

The most recent magnetic reversal, known as the “Laschamps excursion,” was a relatively short-lived event (less than a thousand years in total) that occurred around 41,000 years ago and offers the best opportunity we have to study the consequences of a shock. the extreme change in the earth’s magnetic field. However, and even though several palaeoenvironmental records indicate that this event coincided in time with significant changes in climate and ecology, there was not enough data so far to establish a cause-effect relationship between the two. In this study, Cooper and his colleagues present a new atmospheric radiocarbon record, but this time precisely dated thanks to the kauri rings, miraculously preserved for millennia in New Zealand wetlands. The new record allowed the researchers to align other global radiocarbon records, ordering them in time and giving them, for the first time, meaning.

Read More  'The Lord of the Rings': Viggo Mortensen doesn't know what to expect from the Amazon series

In their work, the researchers discovered a significant increase in atmospheric radiocarbon just during the period of weakening of the magnetic field strength that preceded the polarity reversal. And they showed that this weakness had important consequences. Cooper and his colleagues, indeed, found that during its less intense phase, when the Earth’s magnetic field was barely 6% of its current value, there were substantial alterations in the concentration and circulation of atmospheric ozone, which led to its turn to climate and environmental changes across the globe, including species extinction episodes, which scientists have observed in climate records from 42,000 years ago. In other words, the study shows that fluctuations in the Earth’s magnetic field can affect both temperature and air circulation on a global scale, with major changes in climate and ecology around the world.

Read More  After the end of "Celebrity Big Brother": What else is going on with Adela and Mischa?
- Advertisement -

Must Read

11sixes’ a new Jaipur based online fantasy gaming sensation shines as a ‘Bright Spark’

In this new generation of digital world, online gaming is vibrantly enriching with millions of players and crores of rupees. In this ocean of...

The Most Beautiful Employee Of The Russian Guard Was Fired After 11 Years Of Service. She Was Hounded By Envious Colleagues

In Yekaterinburg, the consideration of the claim of the former employee of the Russian Guard Anna Khramtsova against the leadership of the department began....

In Armenia, The Army Went Against Pashinyan Because Of His Words About The Iskander. The Prime Minister Has No Allies Left

The crisis of statehood in Armenia is becoming more and more threatening. The country, it would seem, is accustomed to political upheavals, the endless...

Alvaro Gurrea, The Spaniard From The Berlinale Who Learned To Make Films To Be Able To Speak

The origin of the first word is not clear. Perhaps it was the imitation of the cry of a beast or the sound emitted...

The Migration Gene That Allows The Peregrine Falcon To Remember Its Routes

Bird movements are perhaps the greatest occasions in nature. Numerous species at times travel significant distances every year looking for food and a great...