| 1 | MODULE geopotential_mod |
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| 2 | |
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| 3 | CONTAINS |
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| 4 | |
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| 5 | SUBROUTINE geopotential(f_phis,f_pks,f_pk,f_theta,f_phi) |
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| 6 | USE icosa |
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| 7 | IMPLICIT NONE |
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| 8 | TYPE(t_field), POINTER :: f_phis(:) |
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| 9 | TYPE(t_field), POINTER :: f_pks(:) |
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| 10 | TYPE(t_field), POINTER :: f_pk(:) |
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| 11 | TYPE(t_field), POINTER :: f_theta(:) |
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| 12 | TYPE(t_field), POINTER :: f_phi(:) |
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| 13 | |
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| 14 | REAL(rstd), POINTER :: phis(:) |
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| 15 | REAL(rstd), POINTER :: pks(:) |
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| 16 | REAL(rstd), POINTER :: pk(:,:) |
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| 17 | REAL(rstd), POINTER :: theta(:,:) |
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| 18 | REAL(rstd), POINTER :: phi(:,:) |
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| 19 | INTEGER :: ind |
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| 20 | |
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| 21 | DO ind=1,ndomain |
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| 22 | IF (.NOT. assigned_domain(ind)) CYCLE |
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| 23 | CALL swap_dimensions(ind) |
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| 24 | CALL swap_geometry(ind) |
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| 25 | phis=f_phis(ind) |
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| 26 | pks=f_pks(ind) |
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| 27 | pk=f_pk(ind) |
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| 28 | theta=f_theta(ind) |
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| 29 | phi=f_phi(ind) |
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| 30 | CALL compute_geopotential(phis,pks,pk,theta,phi,0) |
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| 31 | ENDDO |
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| 32 | |
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| 33 | END SUBROUTINE geopotential |
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| 34 | |
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| 35 | SUBROUTINE compute_geopotential(phis,pks,pk,theta,phi,offset) |
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| 36 | USE icosa |
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| 37 | USE omp_para |
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| 38 | IMPLICIT NONE |
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| 39 | REAL(rstd),INTENT(IN) :: phis(iim*jjm) |
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| 40 | REAL(rstd),INTENT(IN) :: pks(iim*jjm) |
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| 41 | REAL(rstd),INTENT(IN) :: pk(iim*jjm,llm) |
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| 42 | REAL(rstd),INTENT(IN) :: theta(iim*jjm,llm) |
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| 43 | REAL(rstd),INTENT(OUT) :: phi(iim*jjm,llm) |
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| 44 | INTEGER,INTENT(IN) :: offset |
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| 45 | INTEGER :: i,j,ij,l |
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| 46 | |
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| 47 | !!! Compute geopotential |
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| 48 | ! LMD-Z : dh=pi.dtheta-vdp => (1/rho) dp = pi.dtheta - d(h=pi.theta) = -dtheta.gradpi |
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| 49 | ! g.dz = -(1/rho)dp = theta.gradpi |
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| 50 | ! direct (variational) |
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| 51 | ! dz = -(1/rho.g)dp, rho = RT/p = (R/C_p).theta.pi/p |
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| 52 | |
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| 53 | ! for first layer |
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| 54 | |
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| 55 | ! flush pks, pk thetha, phis |
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| 56 | !$OMP BARRIER |
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| 57 | IF(is_omp_level_master) THEN |
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| 58 | DO j=jj_begin-offset,jj_end+offset |
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| 59 | DO i=ii_begin-offset,ii_end+offset |
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| 60 | ij=(j-1)*iim+i |
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| 61 | phi( ij,1 ) = phis( ij ) + theta(ij,1) * ( pks(ij) - pk(ij,1) ) |
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| 62 | ENDDO |
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| 63 | ENDDO |
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| 64 | |
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| 65 | ! for other layers |
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| 66 | DO l = 2, llm |
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| 67 | DO j=jj_begin-offset,jj_end+offset |
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| 68 | DO i=ii_begin-offset,ii_end+offset |
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| 69 | ij=(j-1)*iim+i |
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| 70 | phi(ij,l) = phi(ij,l-1) + 0.5 * ( theta(ij,l) + theta(ij,l-1) ) & |
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| 71 | * ( pk(ij,l-1) - pk(ij,l) ) |
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| 72 | ENDDO |
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| 73 | ENDDO |
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| 74 | ENDDO |
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| 75 | ENDIF |
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| 76 | ! flush phi |
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| 77 | !$OMP BARRIER |
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| 78 | |
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| 79 | END SUBROUTINE compute_geopotential |
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| 80 | |
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| 81 | END MODULE geopotential_mod |
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