Comments by "mpetersen6" (@mpetersen6) on "What Milankovitch Cycles Will Do To Earth" video.

While the Milankovich Cycles certainly have a major effect on whether or not the Earth slips into a Glacial Period there is another factor that needs to be addressed. The arrangement of the Earth's tectonic plates and the continental landmasses have a major effect. The way they effect this is how they shape the global ocean currents. It is thought that the rise of the southern part of Central America shutting off of the circulation between the Pacific and Atlantic Basins is what tripped the Northern Hemisphere into the current Glacial Age 2.5 million years ago. The Southern Hemisphere has been in a Glacial Age for around 30 million years when South America seperated from Antarctica and the circum polar current became established. This shut off the transfer of warmer water to the higher latitudes surrounding Antarctica. There also has to be cyclical pattern in the shift between known warm and cold periods. These are periods that are far too short to be the result of orbital or axial changes. These almost have to be related to changes in Solar output.
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