CO2 Proxy data set from Royer et al 2007

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Carbon dioxide proxy data set for the Phanerozoic (co2proxy_2007.dat) used by

Royer, D. L., R. A. Berner, and J. Park, Climate sensitivity constrained by carbon dioxide concentrations over the last 420 million years, Nature, v446, 530-532, 2007.

data compilation described in

Royer DL. 2006. CO2-forced climate thresholds during the Phanerozoic. Geochimica et Cosmochimica Acta, 70: 5665-5675.