The sudden event of 8200 years ago is likely another volcanic event or possibly caused by the emptying of Lake Agassiz. I really do not like to blame any variation on the Sun. Our sun is variable but of a low amplitude and otherwise super stable. It is a long shot explanation that has to be matched by equal events elsewhere outside the Northern Hemisphere.
GIANT OF GEOLOGY/GLACIOLOGY CHRISTIAN SCHLÜCHTER THROWS CO2 CLIMATE SCIENCE INTO DISARRAY
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