CLM45_halfco2   CLM40_halfco2
    0       1.45      1.45
    1       4.99      6.07
    2      -0.17     -0.39
    3       6.26      9.86
    4      -0.72     -0.91
    5       6.38      9.35
    6      -0.18     -0.35
    7       5.89     10.28
    8       0.24     -0.01
    9       7.49     11.35
   10      -0.17     -0.44
   11       6.87      9.34
   12      93.71     92.01