As the next IPCC assessment nears, scientists use palaeoclimatic data to hone their models.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/forecasters-look-back-time
[2] http://admin.indiaenvironmentportal.org.in/category/author/jeff-tollefson
[3] http://admin.indiaenvironmentportal.org.in/category/journal/nature
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/undefined