This situation has had a serious impact on the Earth's climate: the ozone layer has been depleted, and the tropics have experienced
For the first time in history, we were able to accurately date the time and environmental impact of the last magnetic pole switch.
Chris Turney, Professor, UNSW Science and co-author of the study
The discovery was made possible by the ancientsNew Zealand cowrie trees, which have been stored in sediments for more than 40 thousand years. By examining the rings of these trees, scientists were able to date a spike in radiocarbon levels in the atmosphere caused by the collapse of the Earth's magnetic field.
Approximately 42 thousandyears, the poles of the earth were completely reversed, the strength of the magnetic field dropped to 6% of its present strength. The ionized air, without encountering any more obstacles, warmed up the ozone layer. This triggered a wave of climate change around the world.
Such environmental changes forced the first humans to seek additional shelter.This may explain the sudden appearance of rock art around the world around the world, about 42,000 years ago.years ago.
Over the past 170 years, the Earth's magnetic field has weakened by about 9%, the magnetic north pole is rapidly shifting across the northern hemisphere.
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