abrupt4xCO2   piControl
    0       7.53      2.31
    1       2.52     96.33
    2       7.20      0.71
    3       2.27     96.42
    4       7.61      0.52
    5       6.30     92.40
    6       6.72      0.52
    7       2.99     95.71
    8       7.25      0.63
    9       1.57     97.13
   10       7.07      1.01
   11       2.79     95.91
   12      82.06     84.69