Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ 42,000-year-old tree, captured evidence of the reversal of the Earth’s magnetic field

42,000-year-old tree, captured evidence of the reversal of the Earth’s magnetic field



A few years ago, workers digging to build a power plant in New Zealand discovered a 60-ton trunk of cowrie wood, and now, according to researchers, it has filmed the latest collapse of The Earth’s magnetic field.

tree of the earth's magnetic fieldScienceMag

The massive trunk, which actually belongs to one of the largest tree species in the country, is said to be about 42,000 years old and has been preserved in wet muddy ground ̵

1; its rings have been covered for 1,700 years, showing a chaotic timeline, world magnetic field is turned upside down.

The radiocarbon levels in this massive piece of wood show a jump in radiation from space as The Earth’s magnetic field which protected him weakly, and the pillars actually turned, according to researchers.

They say that by modeling the effect of this radiation on the Earth’s atmosphere, the Earth’s climate has changed dramatically for some time, which could be responsible for the extinction of large mammals. from Australia and Neanderthals in Europe.

More surprisingly, the study tells in detail the story of the timing and magnitude of this pole exchange, while being the first to make a credible case (albeit speculative), arguing that reversal could affect the global climate.

In case you didn’t know The Earth’s magnetic field is formed due to the flow of molten iron in the outer core of the earth’s crust, which is also susceptible to chaotic swings which are known to not only weaken the field, but can also cause the poles to move and turn completely.

It is known that the magnetic orientation of minerals in rocks leaves traces of long-term reversals, but the same cannot be said of inversions that last only a few hundred years, such as about 42,000 years ago. However, radioactive carbon-14 can detect these brief fluctuations. The isotope is created when cosmic rays from space pass through a magnetic field and hit the atmosphere.

It is also ingested by living things on the planet, including trees. The team used the help of radiocarbon to present the aforementioned cowrie wood using accurate but rather raw recordings of radiocarbon caves from China. After measuring the finer changes in carbon-14 in tree rings, they tracked how its growth varied at 40-year intervals as magnetic fields decreased and increased.

Spikes in radiocarbon suggest that the magnetic field weakened by 6 percent of its current strength about 41,500 years ago. During this time, the poles overturn and the field regains some strength, but then breaks and returns about 500 years later.

wood of the earth's magnetic fieldNASA

Researchers also claim that at that time the shield of cosmic rays on our planet was not functional, but on our Sun. Examining hints of ice cores, researchers speculate that the sun was experiencing episodes of low-magnetic activity at the time – called high minima – which they said would destroy today’s energy grids and create auroras in the subtropics due to ionizing the atmosphere.

The implementation of a climate model further suggests that such an attack by cosmic rays would destroy the ozone layer, reducing the heat it would otherwise capture from ultraviolet rays, while causing changes in high-altitude cooling, altering wind currents and causing catastrophic changes on the Earth’s surface. , with colder America and warmer Europe.




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