Table 1 Unconstrained (prior) and constrained (after constraint) cumulative Southern Ocean Cant uptake (petagrams of C) in CMIP5 and CMIP6*.

SimulationsPriorAfter constraint
CMIP6
  Historical
    1850–200549 ± 555 ± 3
    1850–201458 ± 665 ± 4
  SSP1–2.6
    1850–2100134 ± 13158 ± 6
    2015–210078 ± 1096 ± 4
  SSP2-4.5
    1850–2100173 ± 16200 ± 8
    2015–2100117 ± 12138 ± 6
  SSP5-8.5
    1850–2100245 ± 28278 ± 13
    2015–2100187 ± 22214 ± 11
CMIP5
  Historical
    1850-200551 ± 553 ± 4
  RCP2.6
    1850–2100138 ± 10142 ± 6
    2006–210086 ± 888 ± 7
  RCP4.5
    1850–2100174 ± 15183 ± 7
    2006–2100122 ± 12129 ± 7
  RCP8.5
    1850–2100241 ± 24253 ± 9
    2006–2100190 ± 21200 ± 10

*Not all models were available for all future scenarios so that historical and future estimates do not always add up exactly to the estimates of the full period.

†GFDL-ESM2M and GFDL-ESM2G simulations started in 1861.