Enter a term in the search box to find its definition.
Settings
Use the controls in the far right panel to increase or decrease the number of terms automatically displayed (or to completely turn that feature off).
Term Lookup
Settings
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.
"It's like when I see that the warmest period ever was in the '30s during -- and there were much lower CO2 levels. And then, as the glaciers retreat, there are big forests that we realize in the Middle Ages it was warmer than it was now."