Ancient warming periods named, but not ice cycles

 It is my controversial contention that we have 'ice cycles' with a regular period of 300 years, give or take a factor of two.  More speculative is that we are now entering one.  These ice cycles just kill off civilizations that depended on the warmth continuing forever, just like current religious inclinations.

We do not have ice advances for every ice cycle because that depends on isostatic uplift (land bouncing up and down), on a 10,000 year cycle.  If the land is up, like 5,000 years from now, we get a strong ice cycle, and then an 'ice lock', which is snow all year round on the highlands.  This starts the ice advance.

Of course, there are endless infinitely more complex reasons that cannot be measured by physics.  You know what I think of those, but they have a lot of influencer support.

It looks like the influencers have decided to reinvent the wheel.  I hope they get lots of money for it.  Looking things up we have the Roman warm period.

Then we have the medieval warm period which did great things for the Vikings.

But the only cold period that has a name is the Little Ice Age.  The other cold periods were dark ages for civilization, and nobody wants to mention those.  There may be other smaller cycles that nobody talks about.  These are all ocean cycles, that are measurable.  I hope somebody does that one day.

ps those guys looking at iceberg rocks could have gone deeper and mapped all the cycles.  But to do so gets them in the cross-hairs of religious fanatics.  There was another great physics paper that mapped cycles and physics-modelled them from first principles.  They concluded that all temperature swings are caused by the oceans, but they had to write in "of course we know that this warming is carbon".  That was to save themselves, but I don't think it worked because I've never heard of them again.

ps Mayan civilization also destroyed by religion and cold.  They cut down all the forests to make religious white plaster, and were assured they would never need firewood, because it would always be warmer.  Then came the cold.  Standard explanation is ecological disaster because of no jungle, but I know they froze to death.  We almost did the same with natgas.