[17] | 1 | MODULE advect_tracer_mod |
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[19] | 2 | USE icosa |
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[138] | 3 | IMPLICIT NONE |
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[17] | 4 | PRIVATE |
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[22] | 5 | |
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| 6 | TYPE(t_field),POINTER :: f_normal(:) |
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| 7 | TYPE(t_field),POINTER :: f_tangent(:) |
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| 8 | TYPE(t_field),POINTER :: f_gradq3d(:) |
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[137] | 9 | TYPE(t_field),POINTER :: f_cc(:) ! starting point of backward-trajectory (Miura approach) |
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[22] | 10 | |
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[136] | 11 | REAL(rstd), PARAMETER :: pente_max=2.0 ! for vlz |
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| 12 | |
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| 13 | PUBLIC init_advect_tracer, advect_tracer |
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| 14 | |
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[17] | 15 | CONTAINS |
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[22] | 16 | |
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[98] | 17 | SUBROUTINE init_advect_tracer |
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[22] | 18 | USE advect_mod |
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| 19 | REAL(rstd),POINTER :: tangent(:,:) |
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| 20 | REAL(rstd),POINTER :: normal(:,:) |
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[23] | 21 | INTEGER :: ind |
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[22] | 22 | |
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[138] | 23 | CALL allocate_field(f_normal,field_u,type_real,3, name='normal') |
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| 24 | CALL allocate_field(f_tangent,field_u,type_real,3, name='tangent') |
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| 25 | CALL allocate_field(f_gradq3d,field_t,type_real,llm,3, name='gradq3d') |
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| 26 | CALL allocate_field(f_cc,field_u,type_real,llm,3, name='cc') |
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[22] | 27 | |
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| 28 | DO ind=1,ndomain |
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| 29 | CALL swap_dimensions(ind) |
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| 30 | CALL swap_geometry(ind) |
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| 31 | normal=f_normal(ind) |
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| 32 | tangent=f_tangent(ind) |
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| 33 | CALL init_advect(normal,tangent) |
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| 34 | END DO |
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| 35 | |
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[17] | 36 | END SUBROUTINE init_advect_tracer |
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[22] | 37 | |
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[136] | 38 | SUBROUTINE advect_tracer(f_hfluxt, f_wfluxt,f_u, f_q,f_rhodz) |
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[22] | 39 | USE advect_mod |
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[136] | 40 | USE mpipara |
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[22] | 41 | IMPLICIT NONE |
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[17] | 42 | |
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[136] | 43 | TYPE(t_field),POINTER :: f_hfluxt(:) ! time-integrated horizontal mass flux |
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| 44 | TYPE(t_field),POINTER :: f_wfluxt(:) ! time-integrated vertical mass flux |
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| 45 | TYPE(t_field),POINTER :: f_u(:) ! velocity (for back-trajectories) |
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| 46 | TYPE(t_field),POINTER :: f_q(:) ! tracer |
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| 47 | TYPE(t_field),POINTER :: f_rhodz(:) ! mass field at beginning of macro time step |
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[17] | 48 | |
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[138] | 49 | REAL(rstd),POINTER :: q(:,:,:), normal(:,:), tangent(:,:), gradq3d(:,:,:), cc(:,:,:) |
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[136] | 50 | REAL(rstd),POINTER :: hfluxt(:,:), wfluxt(:,:) |
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| 51 | REAL(rstd),POINTER :: rhodz(:,:), u(:,:) |
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[138] | 52 | INTEGER :: ind,k |
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[17] | 53 | |
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[136] | 54 | CALL transfert_request(f_u,req_e1) |
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[138] | 55 | ! CALL transfert_request(f_hfluxt,req_e1) ! BUG : This (unnecessary) transfer makes the computation go wrong |
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| 56 | CALL transfert_request(f_wfluxt,req_i1) |
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[136] | 57 | CALL transfert_request(f_q,req_i1) |
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[138] | 58 | CALL transfert_request(f_rhodz,req_i1) |
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[136] | 59 | |
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| 60 | IF (is_mpi_root) PRINT *, 'Advection scheme' |
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[17] | 61 | |
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[138] | 62 | ! DO ind=1,ndomain |
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| 63 | ! CALL swap_dimensions(ind) |
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| 64 | ! CALL swap_geometry(ind) |
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| 65 | ! normal = f_normal(ind) |
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| 66 | ! tangent = f_tangent(ind) |
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| 67 | ! cc = f_cc(ind) |
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| 68 | ! u = f_u(ind) |
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| 69 | ! q = f_q(ind) |
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| 70 | ! rhodz = f_rhodz(ind) |
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| 71 | ! hfluxt = f_hfluxt(ind) |
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| 72 | ! wfluxt = f_wfluxt(ind) |
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| 73 | ! gradq3d = f_gradq3d(ind) |
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| 74 | ! |
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| 75 | ! ! 1/2 vertical transport |
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| 76 | ! DO k = 1, nqtot |
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| 77 | ! CALL vlz(k==nqtot,0.5, wfluxt,rhodz,q(:,:,k)) |
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| 78 | ! END DO |
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| 79 | ! |
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| 80 | ! ! horizontal transport |
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| 81 | ! CALL compute_backward_traj(tangent,normal,u,0.5*dt*itau_adv, cc) |
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| 82 | ! DO k = 1,nqtot |
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| 83 | ! CALL compute_gradq3d(q(:,:,k),gradq3d) |
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| 84 | ! CALL compute_advect_horiz(k==nqtot,hfluxt,cc,gradq3d, rhodz,q(:,:,k)) |
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| 85 | ! END DO |
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| 86 | ! |
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| 87 | ! ! 1/2 vertical transport |
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| 88 | ! DO k = 1,nqtot |
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| 89 | ! CALL vlz(k==nqtot, 0.5,wfluxt,rhodz, q(:,:,k)) |
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| 90 | ! END DO |
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| 91 | ! END DO |
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| 92 | |
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| 93 | ! 1/2 vertical transport + back-trajectories |
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[22] | 94 | DO ind=1,ndomain |
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[17] | 95 | CALL swap_dimensions(ind) |
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| 96 | CALL swap_geometry(ind) |
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[138] | 97 | normal = f_normal(ind) |
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| 98 | tangent = f_tangent(ind) |
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| 99 | cc = f_cc(ind) |
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| 100 | u = f_u(ind) |
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[136] | 101 | q = f_q(ind) |
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| 102 | rhodz = f_rhodz(ind) |
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| 103 | wfluxt = f_wfluxt(ind) |
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[138] | 104 | DO k = 1, nqtot |
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| 105 | CALL vlz(k==nqtot,0.5, wfluxt,rhodz,q(:,:,k)) |
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| 106 | END DO |
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| 107 | CALL compute_backward_traj(tangent,normal,u,0.5*dt*itau_adv, cc) |
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[22] | 108 | END DO |
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[17] | 109 | |
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[138] | 110 | CALL transfert_request(f_q,req_i1) ! necessary ? |
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| 111 | CALL transfert_request(f_rhodz,req_i1) ! necessary ? |
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[17] | 112 | |
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[138] | 113 | ! horizontal transport - split in two to place transfer of gradq3d |
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[17] | 114 | |
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[136] | 115 | DO k = 1, nqtot |
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[138] | 116 | DO ind=1,ndomain |
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| 117 | CALL swap_dimensions(ind) |
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| 118 | CALL swap_geometry(ind) |
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| 119 | q = f_q(ind) |
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| 120 | gradq3d = f_gradq3d(ind) |
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| 121 | CALL compute_gradq3d(q(:,:,k),gradq3d) |
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| 122 | END DO |
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[17] | 123 | |
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[138] | 124 | CALL transfert_request(f_gradq3d,req_i1) |
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[17] | 125 | |
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[138] | 126 | DO ind=1,ndomain |
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| 127 | CALL swap_dimensions(ind) |
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| 128 | CALL swap_geometry(ind) |
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| 129 | cc = f_cc(ind) |
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| 130 | q = f_q(ind) |
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| 131 | rhodz = f_rhodz(ind) |
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| 132 | hfluxt = f_hfluxt(ind) |
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| 133 | gradq3d = f_gradq3d(ind) |
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| 134 | CALL compute_advect_horiz(k==nqtot,hfluxt,cc,gradq3d, rhodz,q(:,:,k)) |
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| 135 | END DO |
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| 136 | END DO |
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| 137 | |
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| 138 | CALL transfert_request(f_q,req_i1) ! necessary ? |
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| 139 | CALL transfert_request(f_rhodz,req_i1) ! necessary ? |
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| 140 | |
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[136] | 141 | ! 1/2 vertical transport |
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[138] | 142 | DO ind=1,ndomain |
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| 143 | CALL swap_dimensions(ind) |
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| 144 | CALL swap_geometry(ind) |
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| 145 | q = f_q(ind) |
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| 146 | rhodz = f_rhodz(ind) |
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| 147 | wfluxt = f_wfluxt(ind) |
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| 148 | DO k = 1,nqtot |
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| 149 | CALL vlz(k==nqtot, 0.5,wfluxt,rhodz, q(:,:,k)) |
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| 150 | END DO |
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[136] | 151 | END DO |
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[138] | 152 | |
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| 153 | END SUBROUTINE advect_tracer |
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| 154 | |
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[136] | 155 | SUBROUTINE vlz(update_mass, fac,wfluxt,mass, q) |
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| 156 | ! |
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| 157 | ! Auteurs: P.Le Van, F.Hourdin, F.Forget, T. Dubos |
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| 158 | ! |
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| 159 | ! ******************************************************************** |
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| 160 | ! Update tracers using vertical mass flux only |
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| 161 | ! Van Leer scheme with minmod limiter |
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| 162 | ! wfluxt >0 for upward transport |
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| 163 | ! ******************************************************************** |
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[22] | 164 | IMPLICIT NONE |
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[136] | 165 | LOGICAL, INTENT(IN) :: update_mass |
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| 166 | REAL(rstd), INTENT(IN) :: fac, wfluxt(iim*jjm,llm+1) ! vertical mass flux |
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| 167 | REAL(rstd), INTENT(INOUT) :: mass(iim*jjm,llm) |
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| 168 | REAL(rstd), INTENT(INOUT) :: q(iim*jjm,llm) |
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[22] | 169 | |
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[136] | 170 | REAL(rstd) :: dq(iim*jjm,llm), & ! increase of q |
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| 171 | dzqw(iim*jjm,llm), & ! vertical finite difference of q |
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| 172 | adzqw(iim*jjm,llm), & ! abs(dzqw) |
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| 173 | dzq(iim*jjm,llm), & ! limited slope of q |
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| 174 | wq(iim*jjm,llm+1) ! time-integrated flux of q |
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| 175 | REAL(rstd) :: dzqmax, newmass, sigw, qq, w |
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| 176 | INTEGER :: i,ij,l,j |
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[22] | 177 | |
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[136] | 178 | ! finite difference of q |
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[22] | 179 | DO l=2,llm |
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[138] | 180 | DO j=jj_begin-1,jj_end+1 |
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| 181 | DO i=ii_begin-1,ii_end+1 |
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[22] | 182 | ij=(j-1)*iim+i |
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[136] | 183 | dzqw(ij,l)=q(ij,l)-q(ij,l-1) |
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[22] | 184 | adzqw(ij,l)=abs(dzqw(ij,l)) |
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| 185 | ENDDO |
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| 186 | ENDDO |
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| 187 | ENDDO |
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| 188 | |
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[136] | 189 | ! minmod-limited slope of q |
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| 190 | ! dzq = slope*dz, i.e. the reconstructed q varies by dzq inside level l |
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[22] | 191 | DO l=2,llm-1 |
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[138] | 192 | DO j=jj_begin-1,jj_end+1 |
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| 193 | DO i=ii_begin-1,ii_end+1 |
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[22] | 194 | ij=(j-1)*iim+i |
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| 195 | IF(dzqw(ij,l)*dzqw(ij,l+1).gt.0.) THEN |
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[136] | 196 | dzq(ij,l) = 0.5*( dzqw(ij,l)+dzqw(ij,l+1) ) |
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| 197 | dzqmax = pente_max * min( adzqw(ij,l),adzqw(ij,l+1) ) |
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| 198 | dzq(ij,l) = sign( min(abs(dzq(ij,l)),dzqmax) , dzq(ij,l) ) ! NB : sign(a,b)=a*sign(b) |
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[22] | 199 | ELSE |
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[17] | 200 | dzq(ij,l)=0. |
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[22] | 201 | ENDIF |
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| 202 | ENDDO |
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| 203 | ENDDO |
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| 204 | ENDDO |
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[17] | 205 | |
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[136] | 206 | ! 0 slope in top and bottom layers |
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[138] | 207 | DO j=jj_begin-1,jj_end+1 |
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| 208 | DO i=ii_begin-1,ii_end+1 |
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[136] | 209 | ij=(j-1)*iim+i |
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| 210 | dzq(ij,1)=0. |
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| 211 | dzq(ij,llm)=0. |
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[22] | 212 | ENDDO |
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| 213 | ENDDO |
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[17] | 214 | |
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[136] | 215 | ! sigw = fraction of mass that leaves level l/l+1 |
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| 216 | ! then amount of q leaving level l/l+1 = wq = w * qq |
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[22] | 217 | DO l = 1,llm-1 |
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[138] | 218 | DO j=jj_begin-1,jj_end+1 |
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| 219 | DO i=ii_begin-1,ii_end+1 |
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[17] | 220 | ij=(j-1)*iim+i |
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[138] | 221 | w = fac*wfluxt(ij,l+1) |
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| 222 | IF(w>0.) THEN ! upward transport, upwind side is at level l |
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| 223 | sigw = w/mass(ij,l) |
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| 224 | qq = q(ij,l)+0.5*(1.-sigw)*dzq(ij,l) ! qq = q if sigw=1 , qq = q+dzq/2 if sigw=0 |
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| 225 | ELSE ! downward transport, upwind side is at level l+1 |
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[136] | 226 | sigw = w/mass(ij,l+1) |
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[138] | 227 | qq = q(ij,l+1)-0.5*(1.+sigw)*dzq(ij,l+1) ! qq = q if sigw=-1 , qq = q-dzq/2 if sigw=0 |
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[22] | 228 | ENDIF |
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[138] | 229 | wq(ij,l+1) = w*qq |
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[22] | 230 | ENDDO |
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| 231 | ENDDO |
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| 232 | END DO |
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[136] | 233 | ! wq = 0 at top and bottom |
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[138] | 234 | DO j=jj_begin-1,jj_end+1 |
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| 235 | DO i=ii_begin-1,ii_end+1 |
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[22] | 236 | ij=(j-1)*iim+i |
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| 237 | wq(ij,llm+1)=0. |
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| 238 | wq(ij,1)=0. |
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| 239 | ENDDO |
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| 240 | END DO |
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[17] | 241 | |
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[136] | 242 | ! update q, mass is updated only after all q's have been updated |
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[22] | 243 | DO l=1,llm |
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[138] | 244 | DO j=jj_begin-1,jj_end+1 |
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| 245 | DO i=ii_begin-1,ii_end+1 |
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[17] | 246 | ij=(j-1)*iim+i |
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[136] | 247 | newmass = mass(ij,l) + fac*(wfluxt(ij,l)-wfluxt(ij,l+1)) |
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| 248 | q(ij,l) = ( q(ij,l)*mass(ij,l) + wq(ij,l)-wq(ij,l+1) ) / newmass |
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| 249 | IF(update_mass) mass(ij,l)=newmass |
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[22] | 250 | ENDDO |
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| 251 | ENDDO |
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| 252 | END DO |
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[136] | 253 | |
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[22] | 254 | END SUBROUTINE vlz |
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[17] | 255 | |
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| 256 | END MODULE advect_tracer_mod |
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