| 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 | ! Bugfix: Initial density rho is calculated |
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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 124 2007-10-19 15:47:46Z letzel $ |
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| 11 | ! |
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| 12 | ! 97 2007-06-21 08:23:15Z raasch |
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| 13 | ! Initial revision |
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| 14 | ! |
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| 15 | ! Description: |
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| 16 | ! ------------ |
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| 17 | ! Initialization of quantities needed for the ocean version |
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| 18 | !------------------------------------------------------------------------------! |
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| 19 | |
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| 20 | USE arrays_3d |
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| 21 | USE control_parameters |
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| 22 | USE eqn_state_seawater_mod |
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| 23 | USE grid_variables |
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| 24 | USE indices |
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| 25 | |
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| 26 | IMPLICIT NONE |
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| 27 | |
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| 28 | INTEGER :: k |
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| 29 | |
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| 30 | REAL :: sa_l, pt_l, rho_l |
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| 31 | |
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| 32 | ALLOCATE( hyp(nzb:nzt+1) ) |
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| 33 | |
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| 34 | ! |
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| 35 | !-- Set water density near the ocean surface |
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| 36 | rho_surface = 1027.62 |
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| 37 | |
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| 38 | ! |
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| 39 | !-- Calculate initial vertical profile of hydrostatic pressure (in Pa) |
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| 40 | !-- and the reference density (used later in buoyancy term) |
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| 41 | hyp(nzt+1) = surface_pressure * 100.0 |
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| 42 | |
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| 43 | hyp(nzt) = hyp(nzt+1) + rho_surface * g * 0.5 * dzu(nzt+1) |
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| 44 | rho_reference = rho_surface * 0.5 * dzu(nzt+1) |
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| 45 | |
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| 46 | DO k = nzt-1, 0, -1 |
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| 47 | |
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| 48 | sa_l = 0.5 * ( sa_init(k) + sa_init(k+1) ) |
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| 49 | pt_l = 0.5 * ( pt_init(k) + pt_init(k+1) ) |
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| 50 | |
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| 51 | rho_l = eqn_state_seawater_func( hyp(k+1), pt_l, sa_l ) |
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| 52 | |
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| 53 | hyp(k) = hyp(k+1) + rho_l * g * dzu(k+1) |
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| 54 | rho_reference = rho_reference + rho_l * dzu(k+1) |
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| 55 | |
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| 56 | ENDDO |
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| 57 | |
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| 58 | rho_reference = rho_reference / ( zw(nzt) - zu(nzb) ) |
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| 59 | |
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| 60 | ! |
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| 61 | !-- Calculate the reference potential density |
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| 62 | prho_reference = 0.0 |
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| 63 | DO k = 0, nzt |
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| 64 | |
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| 65 | sa_l = 0.5 * ( sa_init(k) + sa_init(k+1) ) |
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| 66 | pt_l = 0.5 * ( pt_init(k) + pt_init(k+1) ) |
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| 67 | |
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| 68 | prho_reference = prho_reference + dzu(k+1) * & |
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| 69 | eqn_state_seawater_func( hyp(0), pt_l, sa_l ) |
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| 70 | |
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| 71 | ENDDO |
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| 72 | |
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| 73 | prho_reference = prho_reference / ( zu(nzt) - zu(nzb) ) |
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| 74 | |
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| 75 | ! |
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| 76 | !-- Calculate the initial potential density, based on the initial |
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| 77 | !-- temperature and salinity profile |
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| 78 | CALL eqn_state_seawater |
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| 79 | |
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| 80 | |
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| 81 | END SUBROUTINE init_ocean |
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