Extinction level event? 42,000 years ago Earths magnetic field shrank to nothing

Don’t look now, it’s a climate disaster of massive proportions and it has nothing to do with CO2.

Scientists have just discovered a wild era 42,000 years ago — where the Earth’s magnetic field practically disappeared. They’ve called it the Adams Event (after Douglas Adams of Hitchhikers Guide fame).

This was hidden previously, just before the Laschamp Excursion which we’ve known about since 1969. That event happened about 41,000 years ago – during which the Earth’s magnetic field briefly flipped. It was a pretty big deal in itself. For 800 years the field strength fell to 28% of it’s current strength and was reversed North-to-south. Due to the weak magnetic field, cosmic rays zinged further into the atmosphere and created a layer of enriched beryllium 10 and carbon 14 which remains to this day in a thin slice around the world buried under all the layers of dirt that came after it.

The giant kauri tree log preserved in Ngāwhā, New Zealand, was alive during the Adams Event. Photo: Nelson Parker https://ift.tt/37zT46d

Extraordinarily, during all this, one giant Kauri tree managed to live for more than 1,700 years. It lived and died in New Zealand, and people got […]

via JoNova

https://ift.tt/3pDW4oA

February 21, 2021 at 12:25PM

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