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1) 10Be data from the GISP2 ice core, Greenland 2) 10Be and petrographic data from cores in the N Atlantic and 3) 14C data from stalagmites from a cave in Oman.
Individually, these are complex tales to tell and I will only give very brief and simplified descriptions.
Figure 1 Time once again is passing from right to left. We start at 40,000 y because that is where the 10Be data begins.I am an isotope geochemist but since this is a vast area of complex science I cannot claim to be an expert in every sphere.I once ran one the largest commercial radiogenic isotope labs in the world.The original post on the GSL 2010 statement and 2013 addendum is at the following link: The Geological Society of London’s Statement on Climate Change The GSL 2013 addendum is at the following link: An addendum to the Statement on Climate Change: Evidence from the Geological Record [Inset image at top, an Inuit canoe that was paddled into the estuary of the river Don, Aberdeen by an Inuit, year 1728.Extensive sea ice and northerly winds must have played a role in the common visits of Inuit to Scottish shores at these times.
Be is an alkaline earth element and when it forms it falls to the ground in rain and snow.