CLM5_halfco2   CLM50_halfco2_AD
    0       1.11      1.10
    1       2.94      5.19
    2      -0.93     -0.93
    3      10.50     12.80
    4      -0.81     -0.79
    5       9.08      9.05
    6      -0.98     -0.96
    7       8.30     10.43
    8      -1.06     -1.09
    9      12.43     12.76
   10      -0.87     -0.89
   11      11.15     13.18
   12      10.06     11.96