[8059] | 1 | MODULE tradwl |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE tradwl *** |
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| 4 | !! Ocean physics: solar radiation penetration in the top ocean levels |
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| 5 | !!====================================================================== |
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| 6 | !! History : POLCOMS ! 1996-10 (J. Holt) Original code |
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| 7 | !! NEMO 3.2 ! 2010-03 (E. O'Dea) Import to Nemo for use in Shelf Model |
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| 8 | !!---------------------------------------------------------------------- |
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| 9 | |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | !! tra_dwl : trend due to the solar radiation penetration |
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| 12 | !! tra_dwl_init : solar radiation penetration initialization |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | USE oce ! ocean dynamics and active tracers |
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| 15 | USE dom_oce ! ocean space and time domain |
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| 16 | USE sbc_oce ! surface boundary condition: ocean |
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| 17 | USE trc_oce ! share SMS/Ocean variables |
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| 18 | USE trd_oce ! trends: ocean variables |
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| 19 | USE trdtra ! ocean active tracers trends |
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| 20 | USE in_out_manager ! I/O manager |
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| 21 | USE phycst ! physical constants |
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| 22 | USE prtctl ! Print control |
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| 23 | USE iom ! I/O manager |
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| 24 | USE fldread ! read input fields |
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| 25 | |
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| 26 | IMPLICIT NONE |
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| 27 | PRIVATE |
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| 28 | |
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| 29 | PUBLIC tra_dwl ! routine called by step.F90 (ln_tradwl=T) |
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| 30 | |
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| 31 | ! !!* Namelist namtra_qsr: penetrative solar radiation |
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| 32 | LOGICAL , PUBLIC :: ln_tradwl = .TRUE. ! light absorption (dwl) flag |
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| 33 | LOGICAL , PUBLIC :: ln_vary_lambda = .TRUE. ! vary Lambda or not flag |
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| 34 | |
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| 35 | !! * Substitutions |
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| 36 | # include "domzgr_substitute.h90" |
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| 37 | # include "vectopt_loop_substitute.h90" |
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| 38 | !!---------------------------------------------------------------------- |
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| 39 | !! NEMO/OPA 3.2 , LOCEAN-IPSL (2009) |
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| 40 | !! $Id$ |
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| 41 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 42 | !!---------------------------------------------------------------------- |
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| 43 | |
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| 44 | CONTAINS |
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| 45 | |
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| 46 | SUBROUTINE tra_dwl( kt ) |
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| 47 | !!---------------------------------------------------------------------- |
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| 48 | !! *** ROUTINE tra_qsr *** |
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| 49 | !! |
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| 50 | !! ** Purpose : Compute the temperature trend due to the solar radiation |
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| 51 | !! penetration and add it to the general temperature trend. |
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| 52 | !! |
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| 53 | !! ** Method : The profile of the solar radiation within the ocean is defined |
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| 54 | !! |
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| 55 | !! Jason Holt Oct 96 |
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| 56 | !! |
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| 57 | !! Calculates change in temperature due to penetrating |
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| 58 | !! radiation, with cooling at the surface layer |
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| 59 | !! |
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| 60 | !! rad=rad0*exp(lambda*z) |
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| 61 | !! |
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| 62 | !! Heat input into box is between z=K and z=K+1 is RAD(K)-RAD(K+1) |
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| 63 | !! |
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| 64 | !! |
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| 65 | !! ** Action : - update ta with the penetrative solar radiation trend |
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| 66 | !! - save the trend in ttrd ('key_trdtra') |
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| 67 | !! |
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| 68 | !!---------------------------------------------------------------------- |
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| 69 | USE oce, ONLY : ztrdt => ua ! use ua as 3D workspace |
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| 70 | USE oce, ONLY : ztrds => va ! use va as 3D workspace |
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| 71 | !! |
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| 72 | INTEGER, INTENT(in) :: kt ! ocean time-step |
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| 73 | !! |
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| 74 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 75 | INTEGER :: irgb ! temporary integers |
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| 76 | REAL(wp) :: zchl, zcoef, zsi0r ! temporary scalars |
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| 77 | REAL(wp) :: zc0, zc1, zc2, zc3 ! - - |
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| 78 | REAL(wp), DIMENSION(jpi,jpj) :: zekb, zekg, zekr ! 2D workspace |
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| 79 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: ze0, ze1 , ze2, ze3, zea ! 3D workspace |
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| 80 | !!---------------------------------------------------------------------- |
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| 81 | !! HERE GO VARIABLES USED IN POLCOMS CLEAN UP LATER |
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| 82 | |
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| 83 | integer i,j,k |
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| 84 | ! real*8 dtmp(n-1) |
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| 85 | real*8 dtmp(jpkm1) |
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| 86 | real*8 z1,z2,Rad0,Rad1,Rad2,rD,SurfOut,cp |
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| 87 | logical first |
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| 88 | save first |
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| 89 | data first/.true./ |
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| 90 | !!--------------------------End of POLCOMS variables Note instead of using saves |
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| 91 | !!--------------------------Could shift this into initial code |
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| 92 | |
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| 93 | IF( kt == nit000 ) THEN |
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| 94 | IF(lwp) WRITE(numout,*) |
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| 95 | IF(lwp) WRITE(numout,*) 'tra_dwl : penetration of the surface solar radiation' |
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| 96 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
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| 97 | CALL tra_dwl_init |
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| 98 | IF( .NOT.ln_tradwl ) RETURN |
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| 99 | ENDIF |
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| 100 | |
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| 101 | IF( l_trdtra ) THEN ! Save ta and sa trends |
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| 102 | ztrdt(:,:,:) = tsa(:,:,:,jp_tem) |
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| 103 | ztrds(:,:,:) = 0.e0 |
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| 104 | ENDIF |
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| 105 | !-------------------------------------------------------------------- |
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| 106 | ! Set transmissivity |
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| 107 | !-------------------------------------------------------------------- |
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| 108 | ! |
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| 109 | ! Normal value |
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| 110 | ! |
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| 111 | !--------------------------------------------------------------------------- |
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| 112 | ! |
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| 113 | ! Convert Heat fluxes to units used in POL subroutine dwl |
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| 114 | ! |
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| 115 | !--------------------------------------------------------------------------- |
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| 116 | cp=3986.0d0 |
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| 117 | |
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| 118 | DO jj = 2, jpj |
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| 119 | DO ji = fs_2, fs_jpim1 |
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| 120 | qsr(ji,jj) = qsr(ji,jj) * (r1_rau0_rcp) |
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| 121 | ENDDO !ji |
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| 122 | ENDDO !jj |
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| 123 | !-------------------------------------------------------------------------------- |
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| 124 | if ( first ) then |
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| 125 | rlambda2(:,:) = 0.0 |
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| 126 | first=.false. |
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| 127 | if ( ln_vary_lambda ) then |
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| 128 | ! do j=1,jesub ! Original Polcoms style Loop |
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| 129 | ! do i=1,iesub ! Original Polcoms style Loop |
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| 130 | |
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| 131 | do jj=2,jpjm1 |
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| 132 | do ji = fs_2, fs_jpim1 ! vector opt. |
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| 133 | |
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| 134 | ! if(ipexb(i,j).ne. 0) then (Mask, use Tmask instead) |
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| 135 | |
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| 136 | rlambda2(ji,jj)=-0.033*log(hbatt(ji,jj))+0.2583 ! JIAs formula |
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| 137 | rlambda2(ji,jj)=max(0.05,rlambda2(ji,jj)) ! limit in deep water |
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| 138 | enddo ! ji |
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| 139 | enddo ! jj |
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| 140 | rlambda = 0.0 |
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| 141 | else |
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| 142 | rLambda=0.154 |
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| 143 | endif ! If vary lambda |
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| 144 | endif ! If first |
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| 145 | |
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| 146 | ! do j=1,jesub ! Original Polcoms Style Loop |
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| 147 | ! do i=1,iesub ! Original Polcoms Style Loop |
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| 148 | do jk=2,jpk |
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| 149 | DO jj=2,jpjm1 |
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| 150 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 151 | |
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| 152 | !-------------------------------------------------------------------- |
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| 153 | ! Calculate change in temperature |
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| 154 | !-------------------------------------------------------------------- |
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| 155 | ! |
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| 156 | ! rad0 = hfl_in(i,j) ! change hfl_in to qsr I assume |
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| 157 | |
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| 158 | rad0 = qsr(ji,jj) |
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| 159 | rD = rLambda2(ji,jj) +rLambda ! Transmissivity to be used here |
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| 160 | ! if rlambda 0 then rlambda2 not zer and vica versa |
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| 161 | |
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| 162 | z2=gdepw_0(ji,jj,jk-1) ! grid box is from z=z1 to z=z2 |
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| 163 | z1=gdepw_0(ji,jj,jk) |
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| 164 | |
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| 165 | Rad2=Rad0*(exp(-z2*rD)) ! radiation entering box |
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| 166 | Rad1=Rad0*(exp(-z1*rD)) ! radiation leaving box |
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| 167 | |
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| 168 | |
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| 169 | dtmp(jk)=1.0/(e3t_0(ji,jj,jk))*(Rad2-Rad1) !change in temperature |
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| 170 | tsa(ji,jj,jk,jp_tem) = tsa(ji,jj,jk,jp_tem) + dtmp(jk) |
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| 171 | enddo ! ji |
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| 172 | enddo ! jj |
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| 173 | enddo !jk |
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| 174 | |
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| 175 | |
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| 176 | IF( l_trdtra ) THEN ! qsr tracers trends saved for diagnostics |
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| 177 | ztrdt(:,:,:) = tsa(:,:,:,jp_tem) - ztrdt(:,:,:) |
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| 178 | !CEODCALL trd_mod( ztrdt, ztrds, jptra_trd_qsr, 'TRA', kt ) |
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| 179 | ENDIF |
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| 180 | ! ! print mean trends (used for debugging) |
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| 181 | IF(ln_ctl) CALL prt_ctl( tab3d_1=tsa(:,:,:,jp_tem), clinfo1=' qsr - Ta: ', mask1=tmask, clinfo3='tra-ta' ) |
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| 182 | ! |
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| 183 | END SUBROUTINE tra_dwl |
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| 184 | |
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| 185 | |
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| 186 | SUBROUTINE tra_dwl_init |
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| 187 | !!---------------------------------------------------------------------- |
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| 188 | !! *** ROUTINE tra_dwl_init *** |
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| 189 | !! |
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| 190 | !! ** Purpose : Initialization for the penetrative solar radiation for Downwell routine |
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| 191 | !! |
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| 192 | !! ** Method : The profile of solar radiation within the ocean is set |
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| 193 | !! from two length scale of penetration (rn_si0,rn_si1) and a ratio |
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| 194 | !! (rn_abs). These parameters are read in the namtra_qsr namelist. The |
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| 195 | !! default values correspond to clear water (type I in Jerlov' |
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| 196 | !! (1968) classification. |
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| 197 | !! called by tra_qsr at the first timestep (nit000) |
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| 198 | !! |
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| 199 | !! ** Action : - initialize rn_si0, rn_si1 and rn_abs |
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| 200 | !! |
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| 201 | !! Reference : Jerlov, N. G., 1968 Optical Oceanography, Elsevier, 194pp. |
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| 202 | !!---------------------------------------------------------------------- |
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| 203 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 204 | INTEGER :: ios ! Local integer output status for namelist read |
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| 205 | INTEGER :: irgb, ierror ! temporary integer |
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| 206 | INTEGER :: ioptio, nqsr ! temporary integer |
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| 207 | REAL(wp) :: zc0 , zc1 ! temporary scalars |
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| 208 | REAL(wp) :: zc2 , zc3 , zchl ! - - |
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| 209 | REAL(wp) :: zsi0r, zsi1r, zcoef ! - - |
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| 210 | REAL(wp), DIMENSION(jpi,jpj) :: zekb, zekg, zekr ! 2D workspace |
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| 211 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: ze0 , ze1 , ze2 , ze3 , zea ! 3D workspace |
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| 212 | !! |
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| 213 | CHARACTER(len=100) :: cn_dir ! Root directory for location of ssr files |
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| 214 | TYPE(FLD_N) :: sn_chl ! informations about the chlorofyl field to be read |
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| 215 | NAMELIST/namtra_dwl/ ln_tradwl, ln_vary_lambda |
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| 216 | !!---------------------------------------------------------------------- |
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| 217 | |
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| 218 | REWIND( numnam_ref ) ! Read Namelist namtra_dwl in reference namelist : |
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| 219 | READ ( numnam_ref, namtra_dwl, IOSTAT = ios, ERR = 901) |
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| 220 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namtra_qsr in reference namelist', lwp ) |
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| 221 | |
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| 222 | REWIND( numnam_cfg ) ! Read Namelist namtra_dwl in configuration namelist : |
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| 223 | READ ( numnam_cfg, namtra_dwl, IOSTAT = ios, ERR = 902) |
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| 224 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namtra_qsr in configuration namelist', lwp ) |
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| 225 | ! |
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| 226 | IF(lwp) THEN ! control print |
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| 227 | WRITE(numout,*) |
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| 228 | WRITE(numout,*) 'tra_dwl_init : ' |
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| 229 | WRITE(numout,*) '~~~~~~~~~~~~' |
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| 230 | WRITE(numout,*) ' Namelist namtra_dwl : set the parameter of penetration' |
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| 231 | WRITE(numout,*) ' Light penetration (T) or not (F) ln_tradwl = ', ln_tradwl |
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| 232 | WRITE(numout,*) ' Vary Lambda (T) or not (F)) ln_vary_lambda = ', ln_vary_lambda |
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| 233 | ENDIF |
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| 234 | |
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| 235 | END SUBROUTINE tra_dwl_init |
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| 236 | |
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| 237 | !!====================================================================== |
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| 238 | END MODULE tradwl |
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