[4351] | 1 | MODULE dynstcor |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE dynstcor *** |
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| 4 | !! Ocean dynamics: Stokes-Coriolis effect. |
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| 5 | !! |
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| 6 | !!====================================================================== |
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| 7 | !! History : 0.1 ! 2012-10 (Oyvind Breivik) |
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| 8 | !!---------------------------------------------------------------------- |
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| 9 | !! dyn_stcor : Add the Stokes-Coriolis forcing to the momentum equation |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | USE oce ! ocean dynamics and tracers |
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| 12 | USE dom_oce ! ocean space and time domain |
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| 13 | USE in_out_manager ! I/O manager |
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| 14 | USE lib_mpp ! distributed memory computing |
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| 15 | USE prtctl ! Print control |
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| 16 | USE phycst |
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| 17 | USE lbclnk |
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| 18 | USE wrk_nemo ! Memory Allocation |
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| 19 | USE sbcmod ! Access to ln_stcor (sbc_oce) and wave parameters (sbc_wave) |
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| 20 | USE sbcwave_ecmwf ! Wave module |
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| 21 | |
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| 22 | IMPLICIT NONE |
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| 23 | |
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| 24 | REAL(wp) :: rn_deptmaxstcor = 150.0_wp ! maximum depth [m] to be affected by Stokes-Coriolis effect |
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| 25 | !PRIVATE |
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| 26 | |
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| 27 | !! * Routine accessibility |
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| 28 | PUBLIC dyn_stcor ! routine called by step.F90 |
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| 29 | |
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| 30 | !! * Shared module variables |
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| 31 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: ustc, vstc ! Stokes-Coriolis u and v |
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| 32 | |
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| 33 | !! * Module variables |
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| 34 | |
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| 35 | !! * Substitutions |
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| 36 | # include "vectopt_loop_substitute.h90" |
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| 37 | # include "domzgr_substitute.h90" |
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| 38 | !!---------------------------------------------------------------------- |
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| 39 | !! OPA 9.0 , implemented by Bedford Institute of Oceanography |
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| 40 | !!---------------------------------------------------------------------- |
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| 41 | |
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| 42 | CONTAINS |
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| 43 | |
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| 44 | INTEGER FUNCTION dynstcor_alloc() |
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| 45 | !!---------------------------------------------------------------------- |
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| 46 | !! *** ROUTINE dynstcor_alloc *** |
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| 47 | !! |
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| 48 | !! History : 1.0 ! 2012-10 (Oyvind Breivik) |
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| 49 | !!---------------------------------------------------------------------- |
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| 50 | ALLOCATE( ustc(jpi,jpj,jpk) , vstc(jpi,jpj,jpk) , STAT=dynstcor_alloc ) |
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| 51 | ! |
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| 52 | IF( dynstcor_alloc /= 0 ) CALL ctl_warn('dynstcor_alloc: array allocate failed.') |
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| 53 | END FUNCTION dynstcor_alloc |
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| 54 | |
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| 55 | SUBROUTINE dyn_stcor( kt ) |
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| 56 | !!---------------------------------------------------------------------- |
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| 57 | !! *** ROUTINE dyn_stcor *** |
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| 58 | !! |
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| 59 | !! ** Purpose: Add Stokes-Coriolis forcing to horizontal momentum equation. |
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| 60 | !! |
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| 61 | !! ** History: 0.1 ! 2012-10 oyvind.breivik@ecmwf.int |
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| 62 | !!---------------------------------------------------------------------- |
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| 63 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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| 64 | !! |
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| 65 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 66 | REAL(wp) :: ztransp, zsp0, zk, zfac |
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| 67 | REAL(wp) :: zus, zvs |
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| 68 | ! |
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| 69 | |
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| 70 | ! Allocation at first time step. |
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| 71 | |
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| 72 | IF ( kt == nit000 ) THEN |
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| 73 | IF( dynstcor_alloc() /= 0 ) CALL ctl_stop('dyn_stcor: array allocate failed.') |
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| 74 | ENDIF |
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| 75 | |
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| 76 | !!---------------------------------------------------------------------- |
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| 77 | ! |
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| 78 | ! Update velocity tendencies ua, va by adding the Stokes-Coriolis velocities ustc, vstc |
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| 79 | ! |
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| 80 | DO jk = 1, jpk |
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| 81 | DO jj = 1, jpj |
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| 82 | DO ji = 1, jpi |
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| 83 | ! Skip deep levels where the Stokes-Coriolis effect is negligible |
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| 84 | IF (fsdept(ji,jj,jk) <= rn_deptmaxstcor) THEN |
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| 85 | ! Stokes transport speed estimated from Hs and Tmean |
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| 86 | ztransp = 2.0_wp*rpi*swh_wavepar(ji,jj)**2.0_wp/(16.0_wp*MAX(mwp_wavepar(ji,jj),0.0000001_wp)) |
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| 87 | |
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| 88 | ! Stokes surface speed |
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| 89 | zsp0 = SQRT(ust_wavepar(ji,jj)**2 + vst_wavepar(ji,jj)**2) |
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| 90 | |
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| 91 | ! Wavenumber scale |
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| 92 | zk = ABS(zsp0)/MAX(ABS(5.97_wp*ztransp),0.0000001_wp) |
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| 93 | |
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| 94 | ! Depth attenuation |
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| 95 | zfac = EXP(-2.0_wp*zk*fsdept(ji,jj,jk))/(1.0_wp+8.0_wp*zk*fsdept(ji,jj,jk)) |
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| 96 | |
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| 97 | ! The Stokes-Coriolis forcing |
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| 98 | zus = ff(ji,jj)*vst_wavepar(ji,jj)*zfac |
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| 99 | zvs = -ff(ji,jj)*ust_wavepar(ji,jj)*zfac |
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| 100 | |
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| 101 | ! Store arrays of tendencies for diagnostics output |
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| 102 | ! This may be removed later for efficiency |
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| 103 | ustc(ji,jj,jk) = zus |
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| 104 | vstc(ji,jj,jk) = zvs |
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| 105 | |
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| 106 | ua(ji,jj,jk) = ua(ji,jj,jk) + zus * umask(ji,jj,jk) |
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| 107 | va(ji,jj,jk) = va(ji,jj,jk) + zvs * vmask(ji,jj,jk) |
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| 108 | ENDIF |
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| 109 | ENDDO |
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| 110 | ENDDO |
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| 111 | ENDDO |
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| 112 | ! |
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| 113 | END SUBROUTINE dyn_stcor |
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| 114 | |
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| 115 | |
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| 116 | END MODULE dynstcor |
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