“There is no evidence of increased extinction rates associated with any of the past reversals,” the announcer for PBS Space Time video assures us.
Really!??
Oh, “there may be higher incidences of cancers and other mutations from more high-energy particles reaching the ground,” he continues. “And probably we’ll need to get much better at shielding satellites from the solar wind.”
Higher incidences of cancer and other mutations, but no evidence of increased extinction rates?
The short answer I get from this video about whether or not Earth’s magnetic field is preparing to flip is, “Well, maybe.” How’s that for a scientific answer?
However, the video does provide some insights that I have referred to in both Not by Fire but by Ice and Magnetic Reversals and Evolutionary Leaps.
Our magnetic field is currently undergoing rapid changes, possibly signalling the imminent flipping of its polarity, the video says. The north pole may become the south, and the south the north.
The earth’s magnetic north pole is currently moving around 60 km (37 miles) per year, around 5 degrees south of the geographic pole, leaving Canadian territory and heading toward Siberia.
The good news (I guess) is that Earth’s magnetic field will probably hold out for at least our lifetimes… and perhaps for generations to come.
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February 17, 2020 at 12:53PM
Iowa Climate Science Education 