This emphasizes that over the last 5 million years, we've also seen an increase in the size of the fluctuations of global ice volume. (tamino.wordpress.com)
These records provide both a direct measure of sea level and an indirect measure of global ice volume. (britannica.com)
If one takes the simple view that deglaciation is forced by only global ice volume change and greenhouse feedbacks, then one would be forced to conclude that Antarctic temperature change led all of its forcings! (realclimate.org)