Figure 1: The blue curve is a calculation of the maximum insolation in summer at the north pole. The ice volume data is the benthic d18O stack. In red is the Epica temperature anomaly data from Antarctica. In yellow is the Epica CO2 data and in purple their dust data. The black curve is the change in the Earth’s orbital eccentricity. The temperature, dust, and ice volume data have all been scaled for comparison purposes.