for scene 21 of the video " The Ice Age: 6-in-1 Flank" by Rolf Witzsche - Ice Age Ahead not Global
here for a larger image
Proxy is measured in Beryllium-10 isotope ratios
The other proxy is measured in Beryllium-10 isotope ratios. And the third proxy is measured in sunspot numbers.
Each of these proxies reflect the intensity of solar activity in historic time.
Index - Previous
Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.