1pctCO2   piControl
    0       1.34      0.84
    1       5.55     34.32
    2       0.81     -0.05
    3      16.22     43.13
    4       0.71     -0.06
    5      13.40     39.21
    6       0.64     -0.19
    7      19.34     36.72
    8       0.94     -0.03
    9      18.57     40.20
   10       0.94      0.05
   11      12.17     43.97
   12       8.85      8.29