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Alternative Ocean and Ice Initial Conditions for the CCSM

Alternative Ocean and Ice Initial Conditions for the CCSM. Can simple initial conditions be used?. How does the spin-up change?. Initial Conditions.

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Alternative Ocean and Ice Initial Conditions for the CCSM

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  1. Alternative Ocean and Ice Initial Conditions for the CCSM Can simple initial conditions be used? How does the spin-up change?

  2. Initial Conditions “…. We now try to address why the CSM1 has achieved this success. We believe there is a two-part answer: the first is the state-of-the-art component models, and thesecond is the spin-up procedure used. ….” Boville and Gent (1998) CSM1 Ocean Ice CCSM January-Mean Levitus/Poles Mysterious 1000y Zonal- and Time-Mean Levitus/Poles Mysterious 50y OZM/IM Zonal- and Time-Mean Levitus/Poles Zero 150y OZM/I0

  3. NH Ice Volume, Snow Volume, and Ice Area OZM/IM CCSM OZM/IM OZM/I0

  4. Sea Surface Temperature CCSM OZM/IM OZM/IM - CCSM OZM/IM – OZM/I0

  5. Arctic Sea Surface Salinity CCSM OZM/IM CCSM OZM/IM - CCSM OZM/IM – OZM/I0

  6. Sea Surface Height OZM/IM OZM/IM - CCSM OZM/IM – OZM/I0

  7. Ice Volume, Snow Volume, and Ice Area NH SH OZM/I0 CCSM

  8. SH Ice Area SH Ice Thickness OZM/I0 CCSM OZM/I0 CCSM OZM/I0 - CCSM OZM/I0 - CCSM

  9. Ocean Time Series Global-mean Potential Temp ACC Transport OZM/I0 CCSM OZM/I0 - CCSM OZM/I0 - CCSM

  10. Sea Surface Temperature CCSM OZM/I0

  11. Salinity at 100m CCSM OZM/I0

  12. Barotropic Streamfunction CCSM OZM/I0 OZM/I0 - CCSM

  13. CONCLUSIONS • Simple initial conditions can be used • Ice model spin-up is similar • Ocean has to go through its time scales

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