iFigure 2. As for Figure 1, but comparing June 65N insolation anomaly with the time rate of change of global ice volume (dV/dt). The SPECMAP record has zero lag and HW04 record is lagged by only 1 kyr, in order to show the maximum lag correlation with the insolation time series of “0.8 and “0.4, respectively. Autocorrelation estimates suggest that the SPECMAP and HW04 time series of dV/dt have 106 and 123 degrees of freedom respectively. Therefore, in both cases the correlations are significant at well above the 99% confidence level. If the HW04 record is smoothed in the same manner as SPECMAP (using a ninepoint Gaussian filter [Imbrie et al., 1984]), the maximum lag correlation does not increase. Convention for units is as for Figure 1
Tallbloke's Talkshop 
