Earth Sciences Forum

Andre

Deuterium Excess is discussed in detail here

Masson-Delmotte et al 2005. Science 1 July 2005: Vol. 309. no. 5731, pp. 118 - 121, reconstruct the deuterium excess of the late Pleistocene in the GRIP ice cores. I made a comparison with the d18O and found this:

and

I observe that under normal conditions in the ligh blue areas in the first graph, there is no particular correlation between deuterium excess and d18O. However during the Dansgaard Oeschger events as well as the Bolling Allerod / Younger dryas intervals (yellow first graph), a suddenly a strong correlation shows up, all with about the same trend as well.

Whatever the reason but this strongly suggest that the physics behind both type of events are identical, hence whatever caused the onset and termination of the Dansgaard Oeschger events also seems to have caused the Bolling Allerod - younger Dryas transition.

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