The bipolar see-saw hypothesis provides an explanation for why temperature shifts in the two hemispheres were out of phase at certain times. The hypothesis has now passed a test of one of its predictions.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/southern-see-saw-seen
[2] http://admin.indiaenvironmentportal.org.in/category/author/jeffrey-p-severinghaus
[3] http://admin.indiaenvironmentportal.org.in/category/journal/nature
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oceans-and-seas
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-atlantic-ocean
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-science