Figure 2 - Evaluation of CO2 forcing with reconstructed changes in temperature (
T).
From the following article
Atmospheric carbon dioxide linked with Mesozoic and early Cenozoic climate change
Benjamin J. Fletcher, Stuart J. Brentnall, Clive W. Anderson, Robert A. Berner & David J. Beerling
Nature Geoscience 1, 43 - 48 (2008) Published online: 9 December 2007
doi:10.1038/ngeo.2007.29
a,b, Absolute mean difference in 
T between proxies and 
18O records over the Mesozoic. Points represent the mean, the box the 25–75% range, and the horizontal lines across the box plot the median. Error bars represent the 10–90% range and short horizontal lines the extreme values. c,d, PDFs of the correlation between normalized T calculated from the proxy CO2 records, and 18O records. Squares indicate means, error bars and boxes, the 10–90% and 25–75% uncertainty ranges respectively.
