It is proposed that each AGCM group participating in this intercomparison makes two kinds of simulations; The one in the long term simulation which is very similar with AMIPII experiment and the other is a set of ensemble for 1997-8 El Nino. The details are as follows:

1.Long term simulation

   1)Observed SST run (just the extension of AMIPII integration)

    -simulation period: 1 January 1997-31 August 1998

    -SST and Sea ice: AMIPII monthly mean sea surface temperatures and sea ice for the AMIPII period (January 1979-February 1996) and OISST (NCEP) afterward. Use the sea ice climatological cycle from AMIPII afterward.

    -Other conditions: Same as AMIPII

   2)Climatological SST run

    -simulation period : Same as the observed SST run

    -SST and sea ice : Climatological cycle obtained from AMIPII boundary

2.A set of ensemble experiment for 1997-98 El-Nino

    -Simulation period: 1 September 1996-31 August 1998

    -SST and  sea ice: weekly OISST (NCEP) and monthly sea ice climatology.
    The weekly SST is made based on the AMIP SST climatology and OISST anomaly. Sea ice monthly climatology is used from AMIPII.

    -Other conditions: Same as AMIPII

    -10 Simulations with same boundary conditions but with different initial condition.

    -Initial condition: Taken from the long term AMIPII run (1 September 1996, 1995, 1994,......)

 The main subject of this project is the GCM intercomparison of  1997-98 El-Nino based on 10 ensemble runs. The weekly SST data for boundary condition, detailed diagnostics, and the requested output list are given below.








Output List (MS word file)

Boundary Conditions  -from Jan. 1995 to Sep. 1999

    - SST : OISST anomaly + AMIP2 SST climatology

    - Sea Ice : AMIP2 Sea Ice climatology



For more information on the data, visit PCMDI