Figure in PDF Insolation in this graph is the mean of the two data sets; April-May-June mean at 60^o North and Octobe-November-December mean at 60^o South. Both insolation and temperature data are anomalies relative to past 425 kyrs. You can see fairly good correlation between the insolation and the Antarctic temperature.

Acknowledgement: The data sets were created by Dr. Gary Russell of NASA Goddard Institute for Space Studies.