for scene 55 of the video " The Incredible Experience vs Ice Age - part 1" by Rolf Witzsche
here for a larger image
In the big Greenland ice cores
"In the big Greenland ice cores you have evidence measured for you, of large, steeply rising climate oscillations from deep glacial conditions all the way to near interglacial conditions and then back again, occurring in intervals of 1470 years, called the Dansgaard Oeschger Oscillation. Some of these oscillations were up to 40 times larger than the cooling had been, that had been experienced during the Little Ice Age in the late 1600s, that had devastating effects for many people."
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.