| 1 | SUBROUTINE init_ocean |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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| 4 | ! Actual revisions: |
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| 5 | ! ----------------- |
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| 6 | ! |
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| 7 | ! |
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| 8 | ! Former revisions: |
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| 9 | ! ------------------ |
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| 10 | ! $Id: init_ocean.f90 336 2009-06-10 11:19:35Z heinze $ |
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| 11 | ! |
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| 12 | ! 124 2007-10-19 15:47:46Z raasch |
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| 13 | ! Bugfix: Initial density rho is calculated |
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| 14 | ! |
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| 15 | ! 97 2007-06-21 08:23:15Z raasch |
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| 16 | ! Initial revision |
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| 17 | ! |
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| 18 | ! Description: |
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| 19 | ! ------------ |
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| 20 | ! Initialization of quantities needed for the ocean version |
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| 21 | !------------------------------------------------------------------------------! |
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| 22 | |
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| 23 | USE arrays_3d |
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| 24 | USE control_parameters |
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| 25 | USE eqn_state_seawater_mod |
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| 26 | USE pegrid |
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| 27 | USE grid_variables |
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| 28 | USE indices |
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| 29 | |
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| 30 | IMPLICIT NONE |
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| 31 | |
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| 32 | INTEGER :: k, n |
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| 33 | |
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| 34 | REAL :: sa_l, pt_l, rho_l |
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| 35 | |
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| 36 | REAL, DIMENSION(nzb:nzt+1) :: rho_init |
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| 37 | |
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| 38 | ALLOCATE( hyp(nzb:nzt+1) ) |
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| 39 | |
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| 40 | ! |
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| 41 | !-- Set water density near the ocean surface |
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| 42 | rho_surface = 1027.62 |
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| 43 | |
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| 44 | ! |
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| 45 | !-- Calculate initial vertical profile of hydrostatic pressure (in Pa) |
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| 46 | !-- and the reference density (used later in buoyancy term) |
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| 47 | hyp(nzt+1) = surface_pressure * 100.0 |
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| 48 | |
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| 49 | hyp(nzt) = hyp(nzt+1) + rho_surface * g * 0.5 * dzu(nzt+1) |
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| 50 | rho_init(nzt) = rho_surface |
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| 51 | |
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| 52 | DO k = nzt-1, 0, -1 |
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| 53 | hyp(k) = hyp(k+1) + rho_surface * g * dzu(k) |
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| 54 | ENDDO |
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| 55 | |
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| 56 | IF ( myid == 0 ) THEN |
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| 57 | print*,'hydro pres using rho_surface' |
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| 58 | DO k = nzt+1, 0, -1 |
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| 59 | print*, 'k = ', k, ' hyp = ', hyp(k) |
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| 60 | ENDDO |
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| 61 | print*, ' ' |
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| 62 | ENDIF |
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| 63 | |
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| 64 | DO n = 1, 5 |
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| 65 | |
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| 66 | rho_reference = rho_surface * 0.5 * dzu(nzt+1) |
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| 67 | |
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| 68 | DO k = nzt-1, 0, -1 |
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| 69 | |
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| 70 | sa_l = 0.5 * ( sa_init(k) + sa_init(k+1) ) |
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| 71 | pt_l = 0.5 * ( pt_init(k) + pt_init(k+1) ) |
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| 72 | |
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| 73 | rho_init(k) = eqn_state_seawater_func( hyp(k), pt_l, sa_l ) |
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| 74 | |
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| 75 | rho_reference = rho_reference + rho_init(k) * dzu(k+1) |
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| 76 | |
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| 77 | ENDDO |
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| 78 | |
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| 79 | rho_reference = rho_reference / ( zw(nzt) - zu(nzb) ) |
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| 80 | |
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| 81 | DO k = nzt-1, 0, -1 |
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| 82 | hyp(k) = hyp(k+1) + g * 0.5 * ( rho_init(k) + rho_init(k+1 ) ) * & |
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| 83 | dzu(k+1) |
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| 84 | ENDDO |
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| 85 | |
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| 86 | IF ( myid == 0 ) THEN |
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| 87 | print*,'hydro pres / rho n = ', n |
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| 88 | DO k = nzt+1, 0, -1 |
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| 89 | print*, 'k = ', k, ' hyp = ', hyp(k), ' rho = ', rho_init(k) |
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| 90 | ENDDO |
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| 91 | print*, ' ' |
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| 92 | ENDIF |
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| 93 | |
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| 94 | ENDDO |
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| 95 | |
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| 96 | ! |
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| 97 | !-- Calculate the reference potential density |
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| 98 | prho_reference = 0.0 |
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| 99 | DO k = 0, nzt |
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| 100 | |
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| 101 | sa_l = 0.5 * ( sa_init(k) + sa_init(k+1) ) |
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| 102 | pt_l = 0.5 * ( pt_init(k) + pt_init(k+1) ) |
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| 103 | |
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| 104 | prho_reference = prho_reference + dzu(k+1) * & |
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| 105 | eqn_state_seawater_func( 0.0, pt_l, sa_l ) |
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| 106 | |
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| 107 | ENDDO |
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| 108 | |
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| 109 | prho_reference = prho_reference / ( zu(nzt) - zu(nzb) ) |
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| 110 | |
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| 111 | ! |
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| 112 | !-- Calculate the initial potential density, based on the initial |
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| 113 | !-- temperature and salinity profile |
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| 114 | CALL eqn_state_seawater |
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| 115 | |
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| 116 | |
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| 117 | END SUBROUTINE init_ocean |
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