I have no training in any of the sciences.However,I’ve read more than once that the earth’s orbit around the sun has inconsistencies (at least small ones).If that is,in fact,true it’s easy even for an amateur like myself to see how such fluctuations might effect earth temperatures.
There’s been a suggestion that the orbits of the gas giants — Jupiter, Saturn & Neptune — have an affect on sun-spot activity and the solar-cycles both long & short.
Shhh!
Don’t tell the Religious Order of the Climatinites.
They get mighty angry when proved that they worship a false god.
A short video (about 10 min):
https://www.youtube.com/watch?v=82p-DYgGFjI
Lots of information, but it also puts a lot in perspective.
I believe this 10 min. film would take a full semester in most high school physics classes.
Regards,
HLB