It's called natural cycles I think.  Why is no one from the Climate Change community responding to geo scientists who point out the the migration of magnetic north that is objectively measurable, is the result of change in the rotation of the earth's core, and there's your culprit for climate change?  Speaking of cycles:  https://wattsupwiththat.com/2008/03/16/you-ask-i-provide-november-2nd-1922-arctic-ocean-getting-warm-seals-vanish-and-icebergs-melt/