[1682] | 1 | !> @file init_ocean.f90 |
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[2000] | 2 | !------------------------------------------------------------------------------! |
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[1036] | 3 | ! This file is part of PALM. |
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| 4 | ! |
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[2000] | 5 | ! PALM is free software: you can redistribute it and/or modify it under the |
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| 6 | ! terms of the GNU General Public License as published by the Free Software |
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| 7 | ! Foundation, either version 3 of the License, or (at your option) any later |
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| 8 | ! version. |
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[1036] | 9 | ! |
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| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 13 | ! |
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| 14 | ! You should have received a copy of the GNU General Public License along with |
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| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | ! |
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[2101] | 17 | ! Copyright 1997-2017 Leibniz Universitaet Hannover |
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[2000] | 18 | !------------------------------------------------------------------------------! |
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[1036] | 19 | ! |
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[484] | 20 | ! Current revisions: |
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[95] | 21 | ! ----------------- |
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[2194] | 22 | ! bugfix: density is now used in single-value reference state instead of |
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| 23 | ! potential density |
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[1354] | 24 | ! |
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[1321] | 25 | ! Former revisions: |
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| 26 | ! ------------------ |
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| 27 | ! $Id: init_ocean.f90 2194 2017-03-23 08:03:04Z raasch $ |
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| 28 | ! |
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[2032] | 29 | ! 2031 2016-10-21 15:11:58Z knoop |
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| 30 | ! renamed variable rho_init to rho_ocean_init |
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| 31 | ! |
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[2001] | 32 | ! 2000 2016-08-20 18:09:15Z knoop |
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| 33 | ! Forced header and separation lines into 80 columns |
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| 34 | ! |
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[1683] | 35 | ! 1682 2015-10-07 23:56:08Z knoop |
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| 36 | ! Code annotations made doxygen readable |
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| 37 | ! |
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[1354] | 38 | ! 1353 2014-04-08 15:21:23Z heinze |
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| 39 | ! REAL constants provided with KIND-attribute |
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| 40 | ! |
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[1323] | 41 | ! 1322 2014-03-20 16:38:49Z raasch |
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| 42 | ! REAL constants defined as wp_kind |
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| 43 | ! |
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[1321] | 44 | ! 1320 2014-03-20 08:40:49Z raasch |
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[1320] | 45 | ! ONLY-attribute added to USE-statements, |
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| 46 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 47 | ! kinds are defined in new module kinds, |
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| 48 | ! revision history before 2012 removed, |
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| 49 | ! comment fields (!:) to be used for variable explanations added to |
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| 50 | ! all variable declaration statements |
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[95] | 51 | ! |
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[1182] | 52 | ! 1179 2013-06-14 05:57:58Z raasch |
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| 53 | ! Initial density profile is stored in array hom |
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| 54 | ! |
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[1037] | 55 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 56 | ! code put under GPL (PALM 3.9) |
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| 57 | ! |
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[98] | 58 | ! 97 2007-06-21 08:23:15Z raasch |
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| 59 | ! Initial revision |
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[95] | 60 | ! |
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| 61 | ! Description: |
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| 62 | ! ------------ |
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[1682] | 63 | !> Initialization of quantities needed for the ocean version |
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[95] | 64 | !------------------------------------------------------------------------------! |
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[1682] | 65 | SUBROUTINE init_ocean |
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| 66 | |
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[95] | 67 | |
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[1320] | 68 | USE arrays_3d, & |
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| 69 | ONLY: dzu, hyp, pt_init, ref_state, sa_init, zu, zw |
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| 70 | |
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| 71 | USE control_parameters, & |
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| 72 | ONLY: g, prho_reference, rho_surface, rho_reference, & |
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| 73 | surface_pressure, use_single_reference_value |
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| 74 | |
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| 75 | USE eqn_state_seawater_mod, & |
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| 76 | ONLY: eqn_state_seawater, eqn_state_seawater_func |
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| 77 | |
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| 78 | USE indices, & |
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| 79 | ONLY: nzb, nzt |
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| 80 | |
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| 81 | USE kinds |
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| 82 | |
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[1179] | 83 | USE pegrid |
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[95] | 84 | |
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[1320] | 85 | USE statistics, & |
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| 86 | ONLY: hom, statistic_regions |
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| 87 | |
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[95] | 88 | IMPLICIT NONE |
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| 89 | |
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[1682] | 90 | INTEGER(iwp) :: k !< |
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| 91 | INTEGER(iwp) :: n !< |
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[95] | 92 | |
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[1682] | 93 | REAL(wp) :: pt_l !< |
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| 94 | REAL(wp) :: sa_l !< |
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[95] | 95 | |
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[2031] | 96 | REAL(wp), DIMENSION(nzb:nzt+1) :: rho_ocean_init !< |
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[336] | 97 | |
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[95] | 98 | ALLOCATE( hyp(nzb:nzt+1) ) |
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| 99 | |
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| 100 | ! |
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| 101 | !-- Set water density near the ocean surface |
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[1353] | 102 | rho_surface = 1027.62_wp |
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[95] | 103 | |
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| 104 | ! |
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| 105 | !-- Calculate initial vertical profile of hydrostatic pressure (in Pa) |
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[96] | 106 | !-- and the reference density (used later in buoyancy term) |
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[388] | 107 | !-- First step: Calculate pressure using reference density |
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[1322] | 108 | hyp(nzt+1) = surface_pressure * 100.0_wp |
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[95] | 109 | |
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[1353] | 110 | hyp(nzt) = hyp(nzt+1) + rho_surface * g * 0.5_wp * dzu(nzt+1) |
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[2031] | 111 | rho_ocean_init(nzt) = rho_surface |
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[95] | 112 | |
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[366] | 113 | DO k = nzt-1, 1, -1 |
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[336] | 114 | hyp(k) = hyp(k+1) + rho_surface * g * dzu(k) |
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| 115 | ENDDO |
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[366] | 116 | hyp(0) = hyp(1) + rho_surface * g * dzu(1) |
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[95] | 117 | |
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[388] | 118 | ! |
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| 119 | !-- Second step: Iteratively calculate in situ density (based on presssure) |
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| 120 | !-- and pressure (based on in situ density) |
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[336] | 121 | DO n = 1, 5 |
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[95] | 122 | |
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[1353] | 123 | rho_reference = rho_surface * 0.5_wp * dzu(nzt+1) |
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[95] | 124 | |
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[336] | 125 | DO k = nzt-1, 0, -1 |
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| 126 | |
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[1353] | 127 | sa_l = 0.5_wp * ( sa_init(k) + sa_init(k+1) ) |
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| 128 | pt_l = 0.5_wp * ( pt_init(k) + pt_init(k+1) ) |
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[336] | 129 | |
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[2031] | 130 | rho_ocean_init(k) = eqn_state_seawater_func( hyp(k), pt_l, sa_l ) |
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[336] | 131 | |
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[2031] | 132 | rho_reference = rho_reference + rho_ocean_init(k) * dzu(k+1) |
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[336] | 133 | |
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| 134 | ENDDO |
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| 135 | |
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| 136 | rho_reference = rho_reference / ( zw(nzt) - zu(nzb) ) |
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| 137 | |
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| 138 | DO k = nzt-1, 0, -1 |
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[2031] | 139 | hyp(k) = hyp(k+1) + g * 0.5_wp * ( rho_ocean_init(k) + rho_ocean_init(k+1 ) ) * & |
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[336] | 140 | dzu(k+1) |
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| 141 | ENDDO |
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| 142 | |
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[95] | 143 | ENDDO |
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| 144 | |
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[97] | 145 | ! |
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| 146 | !-- Calculate the reference potential density |
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[1353] | 147 | prho_reference = 0.0_wp |
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[97] | 148 | DO k = 0, nzt |
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[96] | 149 | |
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[1353] | 150 | sa_l = 0.5_wp * ( sa_init(k) + sa_init(k+1) ) |
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| 151 | pt_l = 0.5_wp * ( pt_init(k) + pt_init(k+1) ) |
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[97] | 152 | |
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| 153 | prho_reference = prho_reference + dzu(k+1) * & |
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[1320] | 154 | eqn_state_seawater_func( 0.0_wp, pt_l, sa_l ) |
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[97] | 155 | |
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| 156 | ENDDO |
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| 157 | |
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| 158 | prho_reference = prho_reference / ( zu(nzt) - zu(nzb) ) |
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| 159 | |
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[124] | 160 | ! |
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[388] | 161 | !-- Calculate the 3d array of initial in situ and potential density, |
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| 162 | !-- based on the initial temperature and salinity profile |
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[124] | 163 | CALL eqn_state_seawater |
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[97] | 164 | |
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[1179] | 165 | ! |
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| 166 | !-- Store initial density profile |
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[2031] | 167 | hom(:,1,77,:) = SPREAD( rho_ocean_init(:), 2, statistic_regions+1 ) |
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[124] | 168 | |
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[1179] | 169 | ! |
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| 170 | !-- Set the reference state to be used in the buoyancy terms |
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| 171 | IF ( use_single_reference_value ) THEN |
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[2194] | 172 | ref_state(:) = rho_reference |
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[1179] | 173 | ELSE |
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[2031] | 174 | ref_state(:) = rho_ocean_init(:) |
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[1179] | 175 | ENDIF |
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| 176 | |
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| 177 | |
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[95] | 178 | END SUBROUTINE init_ocean |
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