Versions Compared

Old Version 37

changes.mady.by.user Unknown User (nagc)

Saved on

compared with

New Version 38

changes.mady.by.user Unknown User (nagc)

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

  • Increase the precipitation auto conversion rate - what impact does this have?

    Expand
    titleHow to change the code (click here to expand…)

    Edit the source code to increase the auto conversion rate by 20%

    File: ifs/phys_ec/sucldp.F90, change:

    Code Block
    line 123: RKCONV=1._JPRB/6000._JPRB   ! 1/autoconversion time scale (s)

    to:

    Code Block
    line 123: ! RKCONV=1._JPRB/6000._JPRB   ! 1/autoconversion time scale (s)
line 124: RKCONV=1.2_JPRB/6000._JPRB    ! default scaled by 20%: 1/autoconversion time scale (s)

  • Change the surface transfer coefficient in the turbulence scheme

    Expand

    Reduce the coefficient by 20%.

    Alter surf/module/surfexcdriver_ctl_mod.F90 from :

    Code Block
    line 671:  DO JL=KIDIA,KFDIA
line 672:    IF (JTILE == IFRMAX(JL)) THEN 
line 673:      PKHLEV(JL)=ZKHLEV(JL)
line 674:    ENDIF
line 675:  ENDDO

    to:

    Code Block
    line 671:  DO JL=KIDIA,KFDIA
line 672:    IF (JTILE == IFRMAX(JL)) THEN 
line 673:      PKHLEV(JL)=ZKHLEV(JL)
line 674:    ENDIF
line 675:    !  reduce surface transfer coeff by 20% in turbulence scheme
line 676:    !  for stockholm MSc course experiments
line 677:    ZCFMTI(JL,JTILE)=0.8_JPRB*ZCFMTI(JL,JTILE)
line 678677:  ENDDO

  • Reduce (halve) the asymptotic mixing length scale (K)

    Expand
    titleHow to change the model code (click here to expand)

    For this change, two files need to be edited:

    Code Block
    titleifs/phys_ec/suvdf.F90
     line 53: RLAM   = 75.0_jprb  !! 150._JPRB: reduce to 75m

    and:

    Code Block
    titleifs/phys_ec/vdfexcu.F90
     ZKLEN     = 75.0_jprb  !! 150.0_JPRB     ! asymptotic K length scale troposphere - Reduce to 75m

...