CLM45_halfco2   CLM40_halfco2
    0       0.89      0.71
    1      10.21     18.49
    2      -0.52     -0.04
    3      20.14     32.05
    4      -0.47      0.04
    5      16.74     27.91
    6      -0.61     -0.09
    7      15.21     30.92
    8      -0.59     -0.17
    9      20.66     33.83
   10      -0.41      0.07
   11      20.60     31.87
   12       8.00      7.45