JJ Fanagh

JJ Fanagh

Posted on 10/19/2008

Photo taken on October 18, 2008

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sea level
climate change
Younger Dryas
© Michael Billingsley
Michael Billingsley
JJ Fanagh

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Prominent Cooling Spells - Holocene

Prominent Cooling Spells - Holocene
This Global Warming Art based chart shows several prominent cooling interruptions in an otherwise steep warming and thawing (ocean-filling) trend between approx. 20k years BP and 7k years BP. The earlier of the two cooling bands most likely corresponds with the climate disruption caused by what is now called the "Younger Dryas Extinction Event" (a meteor/comet explosion 200 miles over North America).

The second cooling event, which also lasted almost 1000 years beginning about 11,800 years ago, may have had a similar cause. A southern hemisphere ocean-floor crater in the Indian Ocean and another near Australia may tie to that event. The earth has been struck by meteors and comets with enough frequency to warrant frequent climate "reversals" in human memory.

In addition, I've marked the smaller events of the Storegga Slide in the North Atlantic, and the cooling/glacier re-freezing event of the combined Santorini and Hekla eruptions of 1645 and 1159 BCE (which caused an approx. 400 year hiatus in ocean rise, in fact an ocean-level dropping with the re-growth of glaciers). ©M. Billingsley ISHA