At the beginning of the Holocene period after the crustal displacement of 13,500 BP there was a brief period of climate amelioration as the climate warmed up, then, regressed back into ice age conditions for a period of some 1,500 years, finally warming up considerably and spelling the end of the last ice ice age, with the cold giving way to warmth. So, what really happened? What were the reasons for this climate aberration?
At the end of an ice age there is an interval called the Interstadial period. During this period the Glacial Epoch makes its final advance then retreats for good as the Earth’s orbit around the sun changes from that of a circular pattern to an elliptical one, this is combined with the shifting crust that propelled areas of the ice sheet into warm temperate zones and an overall gradual change in Earth’s obliquity, ie, Earth’s angle of ecliptic. Global warming then gradually took place, which, by the way, was a good thing back then, but not when pushed to the extremes of today by over-population and over-industrialization. Naturally, Earth’s climate fluctuated from cold to warm to cold, and then, finally, to warm once more. Changing from a cold and dry climate to a warm and wet one, and the oscillations this implies to reach its final homeostasis. Hence, the reason it is called an Interstadial period. . .