CO2 concentration derived usind Zachos data Time(MyBP) CO2(ppm) .2500 157.5 .7500 160.1 1.2500 171.7 1.7500 175.2 2.2500 180.8 2.7500 191.6 3.2500 206.6 3.7500 212.4 4.2500 216.2 4.7500 212.9 5.2500 223.1 5.7500 215.1 6.2500 222.4 6.7500 225.9 7.2500 225.7 7.7500 227.3 8.2500 223.6 8.7500 226.9 9.2500 227.2 9.7500 232.3 10.2500 236.2 10.7500 242.5 11.2500 243.1 11.7500 247.2 12.2500 253.0 12.7500 255.3 13.2500 272.5 13.7500 276.6 14.2500 302.3 14.7500 314.8 15.2500 318.4 15.7500 309.1 16.2500 306.1 16.7500 299.3 17.2500 272.8 17.7500 274.9 18.2500 279.9 18.7500 273.5 19.2500 264.7 19.7500 278.7 20.2500 292.4 20.7500 281.1 21.2500 287.6 21.7500 304.6 22.2500 290.2 22.7500 276.1 23.2500 282.0 23.7500 301.8 24.2500 317.5 24.7500 316.3 25.2500 314.5 25.7500 294.5 26.2500 296.7 26.7500 276.7 27.2500 260.1 27.7500 252.2 28.2500 257.1 28.7500 259.9 29.2500 263.0 29.7500 268.8 30.2500 257.8 30.7500 253.3 31.2500 262.8 31.7500 266.5 32.2500 261.1 32.7500 256.3 33.2500 239.8 33.7500 300.6 34.2500 324.5 34.7500 333.2 35.0000 332.5