Fig.1. bottom plot: The 10-50 Kyr BP GRIP d18O per mil density (light gray). Almost 12 Daasgard-Oeschler oscillations are visible. The red line is a 11-points low-pass filter.
top plot: S. Rahmstorf (Geophys.Res.Lett,30, No.10, 1510, 2003) fig.1 with marks for the D-O events. Note that the bottom (GRIP) plot has a different scale with respect to the above GISP2. The pdf file of fig.1 is available at my site, here.