"RHF" wrote in message
oups.com...
JEFF,

.
"Cyclical" World-Wide Climate Pattern changes are measured
in Decades and most often Hundreds of Years; and can last
for Thousands of Years or more...
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Yea I know,, that is what I was referring to.




.
The History of the Norse-Viking habitation of Greenland was
such a 'short term' Cyclical Pattern of Climate Change.
.
just my two cents worth 'jm2cw' ~ RHF
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