Baseline: current operational GFS (OP3T3), labeled O below

List of parameterizations that will be tested:

-   HLW hourly longwave radiation (Yutai)

-   R1LW RRTM1 longwave radiation (restructured OP3T3) (Yutai)

-   NCEP0 NCEP0 shortwave radiation (restructured OP3T3) (Yutai)

-   AERO new aerosol treatment (Yutai)

-   AERG generalized aerosol treatment (Yutai)

-   MRC maximum-random cloud overlap for SW (Yutai)

-   RSW RRTM shortwave radiation (Yutai)

-   RSW0 RRTM shortwave radiation in CTB code (Yutai)

-   N1SW NCEP1 3-band shortwave radiation (Yutai)

-   ESMF ESMF 3.0.1 (Moorthi)

-   ENTH enthalpy equation (Henry)

-   ALB MODIS albedo with diurnal correction (Helin, Fanglin, George)

-   CGW convective gravity wave drag (Ake)

-   OGW retuned mountain blocking (Jordan)

-   OGWX OGW variance range limits (Jordan)

-   OGWD OGW new datasets (Jordan)

-   PBL new PBL (Jongil)

-   MSC mass-flux shallow convection (Jongil)

-   SAS new trigger and momflux in SAS deep convection (Jongil)

-   FMM Ferrier-Moorthi microphysics (Moorthi)

-   RAS RAS deep convection (Moorthi)

-   CO2 realistic CO2 (Yutai)

-   CLDF radiative cloud fraction filtered in the vertical (Moorthi)

-   TVA non-negative vertical tracer advection (Fanglin)

-   SHC3 shallow convection up to sigma 0.7 not 700 mb (Moorthi)

-   CLDF2 radiative cloud water filtered in the vertical (Moorthi)

-   CCN cloud water normalized in cloudy part (Moorthi)

-   Z0T thermal roughness length over land same as ocean (Helin)

-   Z0TN thermal roughness length over land same as NAM (Helin)

-   GSI new GSI with FOTO and variational QC, etc. (Russ)

-   MSTR

List of inadvertent changes:

-   xSCI shallow convection turned off under inversion

-   xAERO new aerosol treatment but with a bug

-   xCRH criticial RH at 0.98 instead of operational 0.85

-   xALBO ocean albedo set to zero

-   xALBI ice albedo uses zero snow fraction

Table of experiments (Director: Moorthi; Producer: Suru; Executive
Producer: Mark)

  ----- ----- ---------------------------------------------------- ------- ---------
  Exp   Ctl   Changes w.r.t. Ctl                                   H/S/C   Status

  1     O     +HLW+xCRH                                                    done

  2     1     +ESMF+R1LW+xAERO+MRC+xSCI+SHC3                       H       done

  3     2     -xSCI                                                H       done

  4     3     -xAERO+AERO                                                  done

  5     4     +ENTH+ALB+xALBO+xALBI+RSW                                    done

  6     5     +PBL+MSC+SAS                                                 done

  7     O                                                          H,S,C   done

  8     5     -xCRH                                                H,S,C   done

  9     6     -xCRH                                                H,S,C   done

  10    9     +FMM                                                 H,S,C   done

  11    8     -xALBO                                               C       ongoing

  12    11    +OGW+CO2+CLDF                                        H,S,C   ongoing

  13    O     +ESMF+NCEP0                                          C       

  14    13    +OGW+ENTH+ALB+xALBO+CO2+CLDF+SHC3+HLW+R1LW           C       

  15    13    -NCEP0+RSW0                                          C       

  16    15    +OGW+ENTH+ALB+xALBO+CO2+CLDF+SHC3+HLW+R1LW                   

  17    12    -CLDF+AERG+OGWD+                                     C       

  18    17    +TVA                                                 C,H     

  19    18    +PBL+MSC+SAS                                         C,H     

  20    19    +FMM                                                 C       

  21    22    +CCN+RAS+FMM+ALB                                             

  22    7     +ESMF+R1LW+RSW+MRC+HLW+ENTH+OGW+OGWX+SHC3+AERG+CO2           

  23    22    +TVA                                                         

  24    22    +OGWD                                                        

  25    22    +ALB                                                         

  26    22    +CCN                                                         

  27    22    +Z0T                                                         

  28    22    +TVA+Z0T+CCN+PBL+MSC+SAS                                     

  29    28    +FMM                                                         

  30    22    +TVA+Z0T+CCN+RAS+FMM+MSC                                     

  31    22    +TVA+CCN+RAS+FMM                                             

  32    22    +GSI                                                         
  ----- ----- ---------------------------------------------------- ------- ---------

Testing strategy (data assimilation experiments spin up for 15 days)

H = High resolution (T382 noDA) forecasts

S = Spring low resolution DA+F

C = 10-year free coupled run

Phase 1.

-   Summer

    -   2 months T126L64(DA+F) 1 Jul 2005 -- 31 Aug 2005

    -   30 T382L64(noDA) 5d forecasts 1 Aug 2005 -- 30 Aug 2005 *for
        some*

-   Winter

    -   2 months T126L64(DA+F) 1 Dec 2006 -- 31 Jan 2007

    -   30 T382L64(noDA) 5d forecasts 1 Jan 2007 -- 30 Jan 2007 *for
        some*

-   Spring *for some*

    -   1 months T126L64(DA+F) 1 May 2007 -- 31 May 2007

    -   30 T382L64(noDA) 5d forecasts 1 May 2007 -- 30 May 2007 *for
        some*

-   Coupled *for some*

    -   10-year T126L64 free coupled run

Phase 2.

-   Summer

    -   4 months T382L64(DA+F) 5 Jul 2005 -- 31 Oct 2005

-   Winter

    -   2 months T382L64(DA+F) 1 Dec 2006 -- 31 Jan 2007

-   Spring

    -   2 months T382L64(DA+F) 1 May 2007 -- 30 Jun 2007

-   Coupled

    -   50-year T126L64 free coupled run

Target schedule

-   1 Jun 2007 Physics packages delivered

-   15 Sep 2007 Decide semi-frozen GFS+GSI

-   1 Dec 2007 Freeze GFS+GSI

-   1 Jan 2008 Deliver code

-   1 Apr 2008 Implement

September 13, 2007

GLOBMOB