And what, precisely, might you mean by "NATURAL"? Do you regard orbital mechanics as unnatural?
What temperature variability? What solar variability?
Do you mean a collapse of the AMOC? Would that also include a collapse of the PMOC? Think for a second. What is currently slowing and threatening to stop the overturning currents? Hint: IT ISN'T NH COOLING.
What would trigger a collapse of the overturning currents in the NH but not the SH and why would such a collapse not lead to glaciation on the Antarctic continent?
But cooling the Arctic will increase the overturning currents.
Restored by what?
How long and why?
This may well be the 8th time you've posted this you have YET to explain jack SHIT. This is nothing but an attempt to baffle us with bullshit. As I said earlier, these are all variations of "it just happens" and as far as science goes, ARE NOT WORTH SHIT.