[328] | 1 | MODULE sponge_mod |
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| 2 | USE icosa |
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| 3 | |
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| 4 | PRIVATE |
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| 5 | |
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| 6 | REAL,SAVE :: tau_sponge !inverse of charactericstic relaxation time scale at the topmost layer (Hz) |
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| 7 | INTEGER,SAVE :: iflag_sponge !0 --> for no sponge |
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| 8 | !1 --> for sponge over 4 topmost layers |
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| 9 | !2 --> for sponge from top to ~1% of top layer pressure |
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| 10 | INTEGER,SAVE :: mode_sponge !1 --> u and v relax towards 0 |
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| 11 | !2 --> u and v relax towards their zonal mean |
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| 12 | !3 --> u,v and pot. temp. relax towards their zonal mean |
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| 13 | !$OMP THREADPRIVATE(tau_sponge,iflag_sponge,mode_sponge) |
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| 14 | REAL,ALLOCATABLE,SAVE :: rdamp(:) ! quenching coefficient |
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| 15 | REAL,ALLOCATABLE,SAVE:: lambda(:) ! inverse or quenching time scale (Hz) |
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| 16 | |
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| 17 | PUBLIC sponge, init_sponge, iflag_sponge |
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| 18 | |
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| 19 | CONTAINS |
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| 20 | |
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| 21 | SUBROUTINE init_sponge |
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| 22 | USE icosa |
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| 23 | USE disvert_mod |
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| 24 | USE omp_para |
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| 25 | USE mpipara, ONLY: is_mpi_master |
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| 26 | IMPLICIT NONE |
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| 27 | INTEGER :: l |
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| 28 | |
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| 29 | tau_sponge = 1.e-4 |
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| 30 | CALL getin("tau_sponge",tau_sponge) |
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| 31 | PRINT*,'tau_sponge = ',tau_sponge |
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| 32 | |
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| 33 | iflag_sponge = 0 |
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| 34 | CALL getin("iflag_sponge",iflag_sponge) |
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| 35 | PRINT*,'iflag_sponge = ',iflag_sponge |
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| 36 | |
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| 37 | mode_sponge = 1 |
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| 38 | CALL getin("mode_sponge",mode_sponge) |
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| 39 | PRINT*,'mode_sponge = ',mode_sponge |
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| 40 | |
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| 41 | IF (iflag_sponge == 0) THEN |
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| 42 | PRINT*,'init_sponge: no sponge' |
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| 43 | RETURN |
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| 44 | ENDIF |
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| 45 | |
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| 46 | !$OMP MASTER |
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| 47 | ALLOCATE(rdamp(llm)) |
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| 48 | ALLOCATE(lambda(llm)) |
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| 49 | |
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| 50 | IF (iflag_sponge == 1) THEN |
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| 51 | ! sponge quenching over the topmost 4 atmospheric layers |
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| 52 | lambda(:)=0. |
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| 53 | lambda(llm)=tau_sponge |
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| 54 | lambda(llm-1)=tau_sponge/2. |
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| 55 | lambda(llm-2)=tau_sponge/4. |
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| 56 | lambda(llm-3)=tau_sponge/8. |
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| 57 | ELSE IF (iflag_sponge == 2) THEN |
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| 58 | ! sponge quenching over topmost layers down to pressures which are |
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| 59 | ! higher than 100 times the topmost layer pressure |
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| 60 | lambda(:)=tau_sponge*max(presnivs(llm)/presnivs(:)-0.01,0.) |
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| 61 | ELSE |
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| 62 | PRINT*,'Bad selector for variable iflag_sponge : <',iflag_sponge, & |
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| 63 | '> options are 0,1,2' |
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| 64 | STOP |
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| 65 | ENDIF |
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| 66 | |
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| 67 | ! quenching coefficient rdamp(:) |
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| 68 | ! rdamp(:)=dt*lambda(:) ! Explicit Euler approx. |
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| 69 | ! rdamp(:)=1.-exp(-lambda(:)*dt) |
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| 70 | rdamp(:)=itau_dissip*lambda(:) |
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| 71 | |
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| 72 | |
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| 73 | IF (is_mpi_master) THEN |
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| 74 | PRINT*,'lambda = ' |
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| 75 | DO l=ll_begin,ll_end |
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| 76 | PRINT*,l,lambda(l) |
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| 77 | ENDDO |
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| 78 | PRINT*,'rdamp = ' |
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| 79 | DO l=ll_begin,ll_end |
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| 80 | PRINT*,l,rdamp(l) |
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| 81 | ENDDO |
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| 82 | ENDIF |
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| 83 | !$OMP END MASTER |
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| 84 | !$OMP BARRIER |
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| 85 | |
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| 86 | END SUBROUTINE init_sponge |
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| 87 | |
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| 88 | SUBROUTINE sponge(f_ue,f_due,f_theta_rhodz,f_dtheta_rhodz) |
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| 89 | USE icosa |
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| 90 | USE theta2theta_rhodz_mod |
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| 91 | USE pression_mod |
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| 92 | USE exner_mod |
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| 93 | USE geopotential_mod |
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| 94 | USE trace |
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| 95 | USE time_mod |
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| 96 | USE omp_para |
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| 97 | IMPLICIT NONE |
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| 98 | TYPE(t_field),POINTER :: f_ue(:) |
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| 99 | TYPE(t_field),POINTER :: f_due(:) |
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| 100 | TYPE(t_field),POINTER :: f_theta_rhodz(:) |
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| 101 | TYPE(t_field),POINTER :: f_dtheta_rhodz(:) |
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| 102 | |
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| 103 | REAL(rstd),POINTER :: due(:,:)!,due_sponge(:,:) |
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| 104 | REAL(rstd),POINTER :: ue(:,:) |
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| 105 | REAL(rstd),POINTER :: theta_rhodz(:,:) |
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| 106 | REAL(rstd),POINTER :: dtheta_rhodz(:,:)!,dtheta_sponge(:,:) |
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| 107 | |
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| 108 | INTEGER :: ind |
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| 109 | INTEGER :: l,ij |
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| 110 | |
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| 111 | !$OMP BARRIER |
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| 112 | |
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| 113 | CALL trace_start("sponge") |
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| 114 | |
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| 115 | IF (mode_sponge == 1) THEN |
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| 116 | DO ind=1,ndomain |
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| 117 | IF (.NOT. assigned_domain(ind)) CYCLE |
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| 118 | CALL swap_dimensions(ind) |
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| 119 | CALL swap_geometry(ind) |
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| 120 | ue=f_ue(ind) |
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| 121 | due=f_due(ind) |
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| 122 | theta_rhodz=f_theta_rhodz(ind) |
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| 123 | dtheta_rhodz=f_dtheta_rhodz(ind) |
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| 124 | |
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| 125 | DO l=ll_begin,ll_end |
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| 126 | !$SIMD |
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| 127 | DO ij=ij_begin,ij_end |
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| 128 | |
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| 129 | due(ij+u_right,l) = -rdamp(l)*ue(ij+u_right,l) |
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| 130 | due(ij+u_lup,l) = -rdamp(l)*ue(ij+u_lup,l) |
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| 131 | due(ij+u_ldown,l) = -rdamp(l)*ue(ij+u_ldown,l) |
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| 132 | |
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| 133 | dtheta_rhodz(ij,l) = 0.0 |
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| 134 | ENDDO |
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| 135 | ENDDO |
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| 136 | END DO |
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| 137 | ELSE |
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| 138 | PRINT*,'Bad selector for variable mode_sponge : <',mode_sponge, & |
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| 139 | '> options 2 and 3 not available for the moment!' |
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| 140 | STOP |
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| 141 | ENDIF |
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| 142 | |
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| 143 | CALL trace_end("sponge") |
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| 144 | |
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| 145 | !$OMP BARRIER |
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| 146 | END SUBROUTINE sponge |
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| 147 | |
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| 148 | END MODULE sponge_mod |
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