[News] Scientists explain why Earth's magnetic north is shifting toward Siberia

[Jultxxxyes]

A 'battle' between two lobes of different magnetic force near the Earth's core would be behind the accelerated motion of the magnetic pole.

 

It is known that the Earth's magnetic north after being close to Canada for hundreds of years began to move rapidly towards the Siberia region since the beginning of the century, but the explanations for this phenomenon have not been clear to date.

In order to discover what causes the displacement of the magnetic field, a team of researchers from the University of Leeds (United Kingdom) and the Technical University of Denmark analyzed 20 years of satellite data and found that a competition between two lobes of different strength Magnetic near the Earth's core is probably behind the pole's motion, according to a recent study published in the journal Nature Geoscience.

The pole has been inexorably displaced towards Russia since the first measurements made in 1831 at its location in the Canadian Arctic. It has been accelerating its speed between 1990 and 2005 to its current speed of 50 and 60 kilometers per year, according to researchers Philip Livermore, Matthew Bayliff and Christopher Finlay in their report.

 

Scientists consider that the path of the magnetic pole is clearly related to two anomalies called negative magnetic fluxes. One of them is deep in Canada and the other is below Siberia. They explain that these large lobes of magnetism grow and shrink over time, having a profound effect on the magnetic field that we perceive on the surface.

It has weakened

According to the researchers, between 1970 and 1999 changes in the interactions between the flowing mantle and the core of our planet caused the area below Canada to lengthen, thus reducing the strength of the magnetic field it generates.

"Historically, the Canadian patch has won the battle and that is why magnetic north has focused on Canada," Livermore explained during an interview with BBC Radio 4. "But in recent decades, the Canadian patch has weakened and the Siberian patch has slightly strengthened, and that explains why the pole has suddenly moved from its historical position, "added the specialist.

According to the scientists, it is clear that the pole will continue to move, however it cannot be predicted with pressure for how long and where it will stop, says the Science Alert portal. They also argue that there is still much that is unknown about the mechanism that works inside the planet and that only the development of more models like this gives the hope of one day predicting where the Earth's poles will end in the future.

Edited May 17, 2020 by YaKuZa--BoSs
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