| 1 | MODULE zoom |
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| 2 | |
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| 3 | USE utils |
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| 4 | |
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| 5 | CONTAINS |
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| 6 | |
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| 7 | SUBROUTINE dtacof_zoom( presto, mask) |
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| 8 | !!---------------------------------------------------------------------- |
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| 9 | !! *** ROUTINE dtacof_zoom *** |
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| 10 | !! |
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| 11 | !! ** Purpose : Compute the damping coefficient for zoom domain |
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| 12 | !! |
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| 13 | !! ** Method : - set along closed boundary due to zoom a damping over |
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| 14 | !! 6 points with a max time scale of 5 days. |
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| 15 | !! - ORCA arctic/antarctic zoom: set the damping along |
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| 16 | !! south/north boundary over a latitude strip. |
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| 17 | !! |
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| 18 | !! ** Action : - resto, the damping coeff. for T and S |
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| 19 | !!---------------------------------------------------------------------- |
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| 20 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: presto ! restoring coeff. (s-1) |
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| 21 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: mask ! restoring coeff. (s-1) |
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| 22 | ! |
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| 23 | INTEGER :: ji, jj, jn ! dummy loop indices |
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| 24 | REAL(wp) :: zlat, zlat0, zlat1, zlat2, z1_5d ! local scalar |
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| 25 | REAL(wp), DIMENSION(6) :: zfact ! 1Dworkspace |
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| 26 | |
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| 27 | !Namelist variables |
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| 28 | LOGICAL :: lzoom_w, lzoom_e, lzoom_n, lzoom_s |
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| 29 | NAMELIST/nam_zoom_dmp/lzoom_n,lzoom_e,lzoom_w,lzoom_s |
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| 30 | !!---------------------------------------------------------------------- |
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| 31 | |
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| 32 | ! Read namelist |
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| 33 | OPEN( UNIT=numnam, FILE='namelist', FORM='FORMATTED', STATUS='OLD' ) |
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| 34 | READ( numnam, nam_dmp_create ) |
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| 35 | CLOSE( numnam ) |
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| 36 | |
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| 37 | zfact(1) = 1._wp |
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| 38 | zfact(2) = 1._wp |
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| 39 | zfact(3) = 11._wp / 12._wp |
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| 40 | zfact(4) = 8._wp / 12._wp |
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| 41 | zfact(5) = 4._wp / 12._wp |
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| 42 | zfact(6) = 1._wp / 12._wp |
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| 43 | zfact(:) = zfact(:) / ( 5._wp * rday ) ! 5 days max restoring time scale |
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| 44 | |
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| 45 | presto(:,:) = 0._wp |
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| 46 | |
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| 47 | ! damping along the forced closed boundary over 6 grid-points |
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| 48 | DO jn = 1, 6 |
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| 49 | IF( lzoom_w ) presto( jn, : ) = zfact(jn) ! west closed |
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| 50 | IF( lzoom_s ) presto( : , jn ) = zfact(jn) ! south closed |
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| 51 | IF( lzoom_e ) presto( jpi+1-jn , : ) = zfact(jn) ! east closed |
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| 52 | IF( lzoom_n ) presto( : , jpj+1-jn ) = zfact(jn) ! north closed |
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| 53 | END DO |
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| 54 | |
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| 55 | ! ! ==================================================== |
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| 56 | IF( cp_cfz == "arctic" .OR. cp_cfz == "antarctic" ) THEN ! ORCA configuration : arctic or antarctic zoom |
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| 57 | ! ! ==================================================== |
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| 58 | WRITE(numout,*) |
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| 59 | IF(cp_cfz == "arctic" ) WRITE(numout,*) ' dtacof_zoom : ORCA Arctic zoom' |
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| 60 | IF(cp_cfz == "antarctic" ) WRITE(numout,*) ' dtacof_zoom : ORCA Antarctic zoom' |
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| 61 | WRITE(numout,*) |
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| 62 | ! |
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| 63 | ! ! Initialization : |
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| 64 | presto(:,:) = 0._wp |
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| 65 | zlat0 = 10._wp ! zlat0 : latitude strip where resto decreases |
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| 66 | zlat1 = 30._wp ! zlat1 : resto = 1 before zlat1 |
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| 67 | zlat2 = zlat1 + zlat0 ! zlat2 : resto decreases from 1 to 0 between zlat1 and zlat2 |
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| 68 | z1_5d = 1._wp / ( 5._wp * rday ) ! z1_5d : 1 / 5days |
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| 69 | |
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| 70 | DO jj = 1, jpj |
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| 71 | DO ji = 1, jpi |
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| 72 | zlat = ABS( gphit(ji,jj) ) |
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| 73 | IF( zlat1 <= zlat .AND. zlat <= zlat2 ) THEN |
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| 74 | presto(ji,jj) = 0.5_wp * z1_5d * ( 1._wp - COS( rpi*(zlat2-zlat)/zlat0 ) ) |
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| 75 | ELSEIF( zlat < zlat1 ) THEN |
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| 76 | presto(ji,jj) = z1_5d |
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| 77 | ENDIF |
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| 78 | END DO |
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| 79 | END DO |
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| 80 | ! |
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| 81 | ENDIF |
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| 82 | ! ! Mask resto array |
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| 83 | presto(:,:) = presto(:,:) * mask(:,:) |
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| 84 | |
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| 85 | END SUBROUTINE dtacof_zoom |
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| 86 | |
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| 87 | END MODULE zoom |
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