dominant levels for SO4

     model      dominant level

      ARQM                FT1 
    ARQM_B                PBL2
       DLR                PBL2
     DLR_B                UTLS
      GISS                FT1 
    GISS_B                FT1 
  GISS_PRE                FT1 
       KYU                PBL2
     KYU_B                PBL1
   KYU_PRE                PBL1
       LOA                PBL2
     LOA_B                PBL2
   LOA_PRE                UTLS
      LSCE                UTLS
    LSCE_B                UTLS
  LSCE_PRE                UTLS
     MATCH                FT1 
   MATCH_B                FT1 
     MOZGN                PBL2
   MOZGN_B                PBL2
   UIO_CTM                PBL2
 UIO_CTM_B                PBL2
UIO_CTM_PR                PBL2
   UIO_GCM                UTLS
 UIO_GCM_B                UTLS
UIO_GCM_PR                UTLS
      ULAQ                UTLS
    ULAQ_B                UTLS
  ULAQ_PRE                UTLS
       UMI                PBL2
     UMI_B                PBL1
   UMI_PRE                PBL1