Not by Fire but by Ice


Discover What Killed the Dinosaurs . . . and Why it Could Soon Kill Us


Link between magnetic reversals and

catastrophic climate change

Correlation at both the K-T boundary and the PETM

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29 Jan 10 - Two Asian scientists, Youn Soo Lee and Kazuto Kodama, have discovered a short magnetic reversal event at the Paleocene-Eocene thermal maximum (PETM), a time of cataclysmic global warming about 55 million years ago.

The Paleocene-Eocene thermal maximum was the most severe global climate change in the Cenozoic Era, say Lee and Kodama.  "Global-scale catastrophic ocean-atmospheric changes violently occurred at the onset of the PETM."

This discovery suggests "a possible coupling" between magnetic reversals and abrupt catastrophic climate change, they continue, "a possible correlation between a cataclysmic climate event and a geomagnetic reversal event."

They then go out on a limb, proposing that this reversal was not only linked to the PETM, but that the PETM "facilitated the reversal" - that catastrophic global warming actually triggered the reversal.  

The Paleocene-Eocene magnetic reversal, which has been confirmed in both hemispheres, was a very short event, only 53 thousand years.

                          A similar event at the K-T boundary

Several detailed magnetostratigraphic studies have also revealed a short polarity reversal at the K-T boundary (when the dinosaurs went extinct), the two scientists report. "These short reversals, found in both the catastrophic PETM and K-T events, suggest a strong possibility that Earth's magnetic field can be influenced by such catastrophic events."

"Sudden catastrophic changes in Earth's rotation rate may drive unusual geomagnetic perturbations, possibly leading to a geomagnetic reversals."

          I think they have it backwards. I think magnetic reversals trigger
          climate change, not the other way around (as you already know if
          you've read "Not by Fire but by Ice"). They have cause and effect

          Either way, this discovery validates my contention that there is
          indeed a correlation between magnetic reversals and climate.

See entire article:
Thanks to Bob Beaver and Boxwell Hawkins for this link

Youn Soo Lee and Kazuto Kodama

Youn Soo Lee is with the Geological Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 305-350, Korea

Kazuto Kodama is with the Kochi Core Center, Kochi University, Kochi 783-8502, Japan




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