This is easily shown from the 74 Jupiter-Saturn conjunctions in the period:
1 J-S = 19.865036 sidereal years = 19.865036*365.25636 days = 7255.8307
(7255.8307*74) / 365.259636 (anomalistic year) = 1469.99945 (1470)
So Earth reaches its perihelion with the Sun exactly 1470 times per 74 J-S.
Both numbers are even, so why is the Dansgaard-Oeschger event not at half the period?
The short answer is: Neptune.
View original post 307 more words
Climate Collections 