Supernova explosions may have helped shape Earth's climate history

Jul 27, 2020
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One minor correction to the story. Carbon -14 is produced in the atmosphere by radiation of Nitrogen-14.

The story has some interesting points. Unfortunately, the precise dating of the supernovas is a major problem with this approach. It noted an increase of 3% for the period around the Vela SN.

One wonders what the range of variations in Carbon-14 increases due purely to solar "events" might be. If this 3% increase is well within the range of a solar event, it seems kind of questionable. Perhaps more data will clarify the issue.
 
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