[888] | 1 | MODULE sbcblk_core |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE sbcblk_core *** |
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| 4 | !! Ocean forcing: momentum, heat and freshwater flux formulation |
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| 5 | !!===================================================================== |
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[1482] | 6 | !! History : 1.0 ! 2004-08 (U. Schweckendiek) Original code |
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| 7 | !! 2.0 ! 2005-04 (L. Brodeau, A.M. Treguier) additions: |
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| 8 | !! - new bulk routine for efficiency |
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| 9 | !! - WINDS ARE NOW ASSUMED TO BE AT T POINTS in input files !!!! |
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| 10 | !! - file names and file characteristics in namelist |
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| 11 | !! - Implement reading of 6-hourly fields |
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| 12 | !! 3.0 ! 2006-06 (G. Madec) sbc rewritting |
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[2715] | 13 | !! - ! 2006-12 (L. Brodeau) Original code for TURB_CORE_2Z |
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[1482] | 14 | !! 3.2 ! 2009-04 (B. Lemaire) Introduce iom_put |
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[2528] | 15 | !! 3.3 ! 2010-10 (S. Masson) add diurnal cycle |
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[3294] | 16 | !! 3.4 ! 2011-11 (C. Harris) Fill arrays required by CICE |
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[888] | 17 | !!---------------------------------------------------------------------- |
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| 18 | |
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| 19 | !!---------------------------------------------------------------------- |
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| 20 | !! sbc_blk_core : bulk formulation as ocean surface boundary condition |
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| 21 | !! (forced mode, CORE bulk formulea) |
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| 22 | !! blk_oce_core : ocean: computes momentum, heat and freshwater fluxes |
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| 23 | !! blk_ice_core : ice : computes momentum, heat and freshwater fluxes |
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| 24 | !! turb_core : computes the CORE turbulent transfer coefficients |
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| 25 | !!---------------------------------------------------------------------- |
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| 26 | USE oce ! ocean dynamics and tracers |
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| 27 | USE dom_oce ! ocean space and time domain |
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| 28 | USE phycst ! physical constants |
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| 29 | USE fldread ! read input fields |
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| 30 | USE sbc_oce ! Surface boundary condition: ocean fields |
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[3680] | 31 | USE cyclone ! Cyclone 10m wind form trac of cyclone centres |
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[2528] | 32 | USE sbcdcy ! surface boundary condition: diurnal cycle |
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[888] | 33 | USE iom ! I/O manager library |
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| 34 | USE in_out_manager ! I/O manager |
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| 35 | USE lib_mpp ! distribued memory computing library |
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[3294] | 36 | USE wrk_nemo ! work arrays |
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| 37 | USE timing ! Timing |
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[888] | 38 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 39 | USE prtctl ! Print control |
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[3294] | 40 | USE sbcwave,ONLY : cdn_wave !wave module |
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| 41 | #if defined key_lim3 || defined key_cice |
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[1465] | 42 | USE sbc_ice ! Surface boundary condition: ice fields |
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[905] | 43 | #endif |
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[888] | 44 | |
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| 45 | IMPLICIT NONE |
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| 46 | PRIVATE |
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| 47 | |
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[2715] | 48 | PUBLIC sbc_blk_core ! routine called in sbcmod module |
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| 49 | PUBLIC blk_ice_core ! routine called in sbc_ice_lim module |
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[3294] | 50 | PUBLIC turb_core_2z ! routine calles in sbcblk_mfs module |
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[2715] | 51 | |
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[1705] | 52 | INTEGER , PARAMETER :: jpfld = 9 ! maximum number of files to read |
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[888] | 53 | INTEGER , PARAMETER :: jp_wndi = 1 ! index of 10m wind velocity (i-component) (m/s) at T-point |
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| 54 | INTEGER , PARAMETER :: jp_wndj = 2 ! index of 10m wind velocity (j-component) (m/s) at T-point |
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[3625] | 55 | INTEGER , PARAMETER :: jp_humi = 3 ! index of specific humidity ( % ) |
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[888] | 56 | INTEGER , PARAMETER :: jp_qsr = 4 ! index of solar heat (W/m2) |
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| 57 | INTEGER , PARAMETER :: jp_qlw = 5 ! index of Long wave (W/m2) |
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| 58 | INTEGER , PARAMETER :: jp_tair = 6 ! index of 10m air temperature (Kelvin) |
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| 59 | INTEGER , PARAMETER :: jp_prec = 7 ! index of total precipitation (rain+snow) (Kg/m2/s) |
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| 60 | INTEGER , PARAMETER :: jp_snow = 8 ! index of snow (solid prcipitation) (kg/m2/s) |
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[1705] | 61 | INTEGER , PARAMETER :: jp_tdif = 9 ! index of tau diff associated to HF tau (N/m2) at T-point |
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[2715] | 62 | |
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[888] | 63 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf ! structure of input fields (file informations, fields read) |
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| 64 | |
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[1601] | 65 | ! !!! CORE bulk parameters |
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[888] | 66 | REAL(wp), PARAMETER :: rhoa = 1.22 ! air density |
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| 67 | REAL(wp), PARAMETER :: cpa = 1000.5 ! specific heat of air |
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| 68 | REAL(wp), PARAMETER :: Lv = 2.5e6 ! latent heat of vaporization |
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| 69 | REAL(wp), PARAMETER :: Ls = 2.839e6 ! latent heat of sublimation |
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| 70 | REAL(wp), PARAMETER :: Stef = 5.67e-8 ! Stefan Boltzmann constant |
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| 71 | REAL(wp), PARAMETER :: Cice = 1.63e-3 ! transfer coefficient over ice |
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[3625] | 72 | REAL(wp), PARAMETER :: albo = 0.066 ! ocean albedo assumed to be constant |
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[888] | 73 | |
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[2528] | 74 | ! !!* Namelist namsbc_core : CORE bulk parameters |
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| 75 | LOGICAL :: ln_2m = .FALSE. ! logical flag for height of air temp. and hum |
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| 76 | LOGICAL :: ln_taudif = .FALSE. ! logical flag to use the "mean of stress module - module of mean stress" data |
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| 77 | REAL(wp) :: rn_pfac = 1. ! multiplication factor for precipitation |
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[888] | 78 | |
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| 79 | !! * Substitutions |
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| 80 | # include "domzgr_substitute.h90" |
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| 81 | # include "vectopt_loop_substitute.h90" |
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| 82 | !!---------------------------------------------------------------------- |
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[2528] | 83 | !! NEMO/OPA 3.3 , NEMO-consortium (2010) |
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[1156] | 84 | !! $Id$ |
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[2528] | 85 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[888] | 86 | !!---------------------------------------------------------------------- |
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| 87 | CONTAINS |
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| 88 | |
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| 89 | SUBROUTINE sbc_blk_core( kt ) |
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| 90 | !!--------------------------------------------------------------------- |
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| 91 | !! *** ROUTINE sbc_blk_core *** |
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| 92 | !! |
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| 93 | !! ** Purpose : provide at each time step the surface ocean fluxes |
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| 94 | !! (momentum, heat, freshwater and runoff) |
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| 95 | !! |
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[1695] | 96 | !! ** Method : (1) READ each fluxes in NetCDF files: |
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| 97 | !! the 10m wind velocity (i-component) (m/s) at T-point |
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| 98 | !! the 10m wind velocity (j-component) (m/s) at T-point |
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[3625] | 99 | !! the 10m or 2m specific humidity ( % ) |
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[1695] | 100 | !! the solar heat (W/m2) |
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| 101 | !! the Long wave (W/m2) |
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[3625] | 102 | !! the 10m or 2m air temperature (Kelvin) |
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[1695] | 103 | !! the total precipitation (rain+snow) (Kg/m2/s) |
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| 104 | !! the snow (solid prcipitation) (kg/m2/s) |
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[3625] | 105 | !! the tau diff associated to HF tau (N/m2) at T-point (ln_taudif=T) |
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[1695] | 106 | !! (2) CALL blk_oce_core |
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[888] | 107 | !! |
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| 108 | !! C A U T I O N : never mask the surface stress fields |
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[3625] | 109 | !! the stress is assumed to be in the (i,j) mesh referential |
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[888] | 110 | !! |
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| 111 | !! ** Action : defined at each time-step at the air-sea interface |
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[1695] | 112 | !! - utau, vtau i- and j-component of the wind stress |
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[3625] | 113 | !! - taum, wndm wind stress and 10m wind modules at T-point |
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| 114 | !! - qns, qsr non-solar and solar heat fluxes |
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| 115 | !! - emp upward mass flux (evapo. - precip.) |
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| 116 | !! - sfx salt flux due to freezing/melting (non-zero only if ice is present) |
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| 117 | !! (set in limsbc(_2).F90) |
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[888] | 118 | !!---------------------------------------------------------------------- |
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[2715] | 119 | INTEGER, INTENT(in) :: kt ! ocean time step |
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[888] | 120 | !! |
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| 121 | INTEGER :: ierror ! return error code |
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[1200] | 122 | INTEGER :: ifpr ! dummy loop indice |
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[1705] | 123 | INTEGER :: jfld ! dummy loop arguments |
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[888] | 124 | !! |
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| 125 | CHARACTER(len=100) :: cn_dir ! Root directory for location of core files |
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| 126 | TYPE(FLD_N), DIMENSION(jpfld) :: slf_i ! array of namelist informations on the fields to read |
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[3625] | 127 | TYPE(FLD_N) :: sn_wndi, sn_wndj, sn_humi, sn_qsr ! informations about the fields to be read |
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| 128 | TYPE(FLD_N) :: sn_qlw , sn_tair, sn_prec, sn_snow, sn_tdif ! - - |
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[1705] | 129 | NAMELIST/namsbc_core/ cn_dir , ln_2m , ln_taudif, rn_pfac, & |
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| 130 | & sn_wndi, sn_wndj, sn_humi , sn_qsr , & |
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| 131 | & sn_qlw , sn_tair, sn_prec , sn_snow, sn_tdif |
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[888] | 132 | !!--------------------------------------------------------------------- |
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| 133 | |
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| 134 | ! ! ====================== ! |
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| 135 | IF( kt == nit000 ) THEN ! First call kt=nit000 ! |
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| 136 | ! ! ====================== ! |
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| 137 | ! set file information (default values) |
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| 138 | cn_dir = './' ! directory in which the model is executed |
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[1601] | 139 | ! |
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[888] | 140 | ! (NB: frequency positive => hours, negative => months) |
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[2528] | 141 | ! ! file ! frequency ! variable ! time intep ! clim ! 'yearly' or ! weights ! rotation ! |
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| 142 | ! ! name ! (hours) ! name ! (T/F) ! (T/F) ! 'monthly' ! filename ! pairs ! |
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| 143 | sn_wndi = FLD_N( 'uwnd10m', 24 , 'u_10' , .false. , .false. , 'yearly' , '' , '' ) |
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| 144 | sn_wndj = FLD_N( 'vwnd10m', 24 , 'v_10' , .false. , .false. , 'yearly' , '' , '' ) |
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| 145 | sn_qsr = FLD_N( 'qsw' , 24 , 'qsw' , .false. , .false. , 'yearly' , '' , '' ) |
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| 146 | sn_qlw = FLD_N( 'qlw' , 24 , 'qlw' , .false. , .false. , 'yearly' , '' , '' ) |
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| 147 | sn_tair = FLD_N( 'tair10m', 24 , 't_10' , .false. , .false. , 'yearly' , '' , '' ) |
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| 148 | sn_humi = FLD_N( 'humi10m', 24 , 'q_10' , .false. , .false. , 'yearly' , '' , '' ) |
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| 149 | sn_prec = FLD_N( 'precip' , -1 , 'precip' , .true. , .false. , 'yearly' , '' , '' ) |
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| 150 | sn_snow = FLD_N( 'snow' , -1 , 'snow' , .true. , .false. , 'yearly' , '' , '' ) |
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| 151 | sn_tdif = FLD_N( 'taudif' , 24 , 'taudif' , .true. , .false. , 'yearly' , '' , '' ) |
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[1601] | 152 | ! |
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[2528] | 153 | REWIND( numnam ) ! read in namlist namsbc_core |
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[888] | 154 | READ ( numnam, namsbc_core ) |
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[2528] | 155 | ! ! check: do we plan to use ln_dm2dc with non-daily forcing? |
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| 156 | IF( ln_dm2dc .AND. sn_qsr%nfreqh /= 24 ) & |
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| 157 | & CALL ctl_stop( 'sbc_blk_core: ln_dm2dc can be activated only with daily short-wave forcing' ) |
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| 158 | IF( ln_dm2dc .AND. sn_qsr%ln_tint ) THEN |
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| 159 | CALL ctl_warn( 'sbc_blk_core: ln_dm2dc is taking care of the temporal interpolation of daily qsr', & |
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| 160 | & ' ==> We force time interpolation = .false. for qsr' ) |
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| 161 | sn_qsr%ln_tint = .false. |
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| 162 | ENDIF |
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| 163 | ! ! store namelist information in an array |
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[888] | 164 | slf_i(jp_wndi) = sn_wndi ; slf_i(jp_wndj) = sn_wndj |
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| 165 | slf_i(jp_qsr ) = sn_qsr ; slf_i(jp_qlw ) = sn_qlw |
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| 166 | slf_i(jp_tair) = sn_tair ; slf_i(jp_humi) = sn_humi |
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| 167 | slf_i(jp_prec) = sn_prec ; slf_i(jp_snow) = sn_snow |
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[1705] | 168 | slf_i(jp_tdif) = sn_tdif |
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[2528] | 169 | ! |
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| 170 | lhftau = ln_taudif ! do we use HF tau information? |
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[1705] | 171 | jfld = jpfld - COUNT( (/.NOT. lhftau/) ) |
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| 172 | ! |
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[2528] | 173 | ALLOCATE( sf(jfld), STAT=ierror ) ! set sf structure |
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[2715] | 174 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_blk_core: unable to allocate sf structure' ) |
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[1705] | 175 | DO ifpr= 1, jfld |
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[2528] | 176 | ALLOCATE( sf(ifpr)%fnow(jpi,jpj,1) ) |
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[2715] | 177 | IF( slf_i(ifpr)%ln_tint ) ALLOCATE( sf(ifpr)%fdta(jpi,jpj,1,2) ) |
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[1200] | 178 | END DO |
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[2528] | 179 | ! ! fill sf with slf_i and control print |
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| 180 | CALL fld_fill( sf, slf_i, cn_dir, 'sbc_blk_core', 'flux formulation for ocean surface boundary condition', 'namsbc_core' ) |
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[1601] | 181 | ! |
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[3625] | 182 | sfx(:,:) = 0._wp ! salt flux; zero unless ice is present (computed in limsbc(_2).F90) |
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| 183 | ! |
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[888] | 184 | ENDIF |
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| 185 | |
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[3625] | 186 | CALL fld_read( kt, nn_fsbc, sf ) ! input fields provided at the current time-step |
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[888] | 187 | |
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[3625] | 188 | ! ! compute the surface ocean fluxes using CORE bulk formulea |
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[3680] | 189 | IF( MOD( kt - 1, nn_fsbc ) == 0 ) CALL blk_oce_core( kt, sf, sst_m, ssu_m, ssv_m ) |
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[3294] | 190 | |
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| 191 | #if defined key_cice |
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| 192 | IF( MOD( kt - 1, nn_fsbc ) == 0 ) THEN |
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| 193 | qlw_ice(:,:,1) = sf(jp_qlw)%fnow(:,:,1) |
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| 194 | qsr_ice(:,:,1) = sf(jp_qsr)%fnow(:,:,1) |
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| 195 | tatm_ice(:,:) = sf(jp_tair)%fnow(:,:,1) |
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| 196 | qatm_ice(:,:) = sf(jp_humi)%fnow(:,:,1) |
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| 197 | tprecip(:,:) = sf(jp_prec)%fnow(:,:,1) * rn_pfac |
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| 198 | sprecip(:,:) = sf(jp_snow)%fnow(:,:,1) * rn_pfac |
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| 199 | wndi_ice(:,:) = sf(jp_wndi)%fnow(:,:,1) |
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| 200 | wndj_ice(:,:) = sf(jp_wndj)%fnow(:,:,1) |
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| 201 | ENDIF |
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| 202 | #endif |
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[2528] | 203 | ! |
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[888] | 204 | END SUBROUTINE sbc_blk_core |
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| 205 | |
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| 206 | |
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[3680] | 207 | SUBROUTINE blk_oce_core( kt, sf, pst, pu, pv ) |
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[888] | 208 | !!--------------------------------------------------------------------- |
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| 209 | !! *** ROUTINE blk_core *** |
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| 210 | !! |
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| 211 | !! ** Purpose : provide the momentum, heat and freshwater fluxes at |
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| 212 | !! the ocean surface at each time step |
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| 213 | !! |
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| 214 | !! ** Method : CORE bulk formulea for the ocean using atmospheric |
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| 215 | !! fields read in sbc_read |
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| 216 | !! |
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| 217 | !! ** Outputs : - utau : i-component of the stress at U-point (N/m2) |
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| 218 | !! - vtau : j-component of the stress at V-point (N/m2) |
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[1695] | 219 | !! - taum : Wind stress module at T-point (N/m2) |
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| 220 | !! - wndm : Wind speed module at T-point (m/s) |
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[888] | 221 | !! - qsr : Solar heat flux over the ocean (W/m2) |
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| 222 | !! - qns : Non Solar heat flux over the ocean (W/m2) |
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| 223 | !! - evap : Evaporation over the ocean (kg/m2/s) |
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[3625] | 224 | !! - emp : evaporation minus precipitation (kg/m2/s) |
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[1242] | 225 | !! |
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| 226 | !! ** Nota : sf has to be a dummy argument for AGRIF on NEC |
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[888] | 227 | !!--------------------------------------------------------------------- |
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[3680] | 228 | INTEGER , INTENT(in ) :: kt ! time step index |
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| 229 | TYPE(fld), INTENT(inout), DIMENSION(:) :: sf ! input data |
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| 230 | REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pst ! surface temperature [Celcius] |
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| 231 | REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pu ! surface current at U-point (i-component) [m/s] |
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| 232 | REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pv ! surface current at V-point (j-component) [m/s] |
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[2715] | 233 | ! |
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| 234 | INTEGER :: ji, jj ! dummy loop indices |
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| 235 | REAL(wp) :: zcoef_qsatw, zztmp ! local variable |
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[3294] | 236 | REAL(wp), DIMENSION(:,:), POINTER :: zwnd_i, zwnd_j ! wind speed components at T-point |
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| 237 | REAL(wp), DIMENSION(:,:), POINTER :: zqsatw ! specific humidity at pst |
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| 238 | REAL(wp), DIMENSION(:,:), POINTER :: zqlw, zqsb ! long wave and sensible heat fluxes |
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| 239 | REAL(wp), DIMENSION(:,:), POINTER :: zqla, zevap ! latent heat fluxes and evaporation |
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| 240 | REAL(wp), DIMENSION(:,:), POINTER :: Cd ! transfer coefficient for momentum (tau) |
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| 241 | REAL(wp), DIMENSION(:,:), POINTER :: Ch ! transfer coefficient for sensible heat (Q_sens) |
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| 242 | REAL(wp), DIMENSION(:,:), POINTER :: Ce ! tansfert coefficient for evaporation (Q_lat) |
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| 243 | REAL(wp), DIMENSION(:,:), POINTER :: zst ! surface temperature in Kelvin |
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| 244 | REAL(wp), DIMENSION(:,:), POINTER :: zt_zu ! air temperature at wind speed height |
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| 245 | REAL(wp), DIMENSION(:,:), POINTER :: zq_zu ! air spec. hum. at wind speed height |
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[888] | 246 | !!--------------------------------------------------------------------- |
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[2715] | 247 | ! |
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[3294] | 248 | IF( nn_timing == 1 ) CALL timing_start('blk_oce_core') |
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| 249 | ! |
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| 250 | CALL wrk_alloc( jpi,jpj, zwnd_i, zwnd_j, zqsatw, zqlw, zqsb, zqla, zevap ) |
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| 251 | CALL wrk_alloc( jpi,jpj, Cd, Ch, Ce, zst, zt_zu, zq_zu ) |
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| 252 | ! |
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[888] | 253 | ! local scalars ( place there for vector optimisation purposes) |
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| 254 | zcoef_qsatw = 0.98 * 640380. / rhoa |
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| 255 | |
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[3625] | 256 | zst(:,:) = pst(:,:) + rt0 ! convert SST from Celcius to Kelvin (and set minimum value far above 0 K) |
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[888] | 257 | |
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| 258 | ! ----------------------------------------------------------------------------- ! |
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| 259 | ! 0 Wind components and module at T-point relative to the moving ocean ! |
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| 260 | ! ----------------------------------------------------------------------------- ! |
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[1000] | 261 | |
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[888] | 262 | ! ... components ( U10m - U_oce ) at T-point (unmasked) |
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| 263 | zwnd_i(:,:) = 0.e0 |
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| 264 | zwnd_j(:,:) = 0.e0 |
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[3680] | 265 | #if defined key_cyclone |
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| 266 | # if defined key_vectopt_loop |
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| 267 | !CDIR COLLAPSE |
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| 268 | # endif |
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| 269 | CALL wnd_cyc( kt, zwnd_i, zwnd_j ) ! add Manu ! |
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| 270 | DO jj = 2, jpjm1 |
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| 271 | DO ji = fs_2, fs_jpim1 ! vect. opt. |
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| 272 | sf(jp_wndi)%fnow(ji,jj,1) = sf(jp_wndi)%fnow(ji,jj,1) + zwnd_i(ji,jj) |
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| 273 | sf(jp_wndj)%fnow(ji,jj,1) = sf(jp_wndj)%fnow(ji,jj,1) + zwnd_j(ji,jj) |
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| 274 | END DO |
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| 275 | END DO |
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| 276 | #endif |
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[888] | 277 | #if defined key_vectopt_loop |
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| 278 | !CDIR COLLAPSE |
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| 279 | #endif |
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| 280 | DO jj = 2, jpjm1 |
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| 281 | DO ji = fs_2, fs_jpim1 ! vect. opt. |
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[2528] | 282 | zwnd_i(ji,jj) = ( sf(jp_wndi)%fnow(ji,jj,1) - 0.5 * ( pu(ji-1,jj ) + pu(ji,jj) ) ) |
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| 283 | zwnd_j(ji,jj) = ( sf(jp_wndj)%fnow(ji,jj,1) - 0.5 * ( pv(ji ,jj-1) + pv(ji,jj) ) ) |
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[888] | 284 | END DO |
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| 285 | END DO |
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| 286 | CALL lbc_lnk( zwnd_i(:,:) , 'T', -1. ) |
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| 287 | CALL lbc_lnk( zwnd_j(:,:) , 'T', -1. ) |
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| 288 | ! ... scalar wind ( = | U10m - U_oce | ) at T-point (masked) |
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| 289 | !CDIR NOVERRCHK |
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| 290 | !CDIR COLLAPSE |
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[1025] | 291 | wndm(:,:) = SQRT( zwnd_i(:,:) * zwnd_i(:,:) & |
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| 292 | & + zwnd_j(:,:) * zwnd_j(:,:) ) * tmask(:,:,1) |
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[888] | 293 | |
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| 294 | ! ----------------------------------------------------------------------------- ! |
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| 295 | ! I Radiative FLUXES ! |
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| 296 | ! ----------------------------------------------------------------------------- ! |
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| 297 | |
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[2528] | 298 | ! ocean albedo assumed to be constant + modify now Qsr to include the diurnal cycle ! Short Wave |
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| 299 | zztmp = 1. - albo |
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| 300 | IF( ln_dm2dc ) THEN ; qsr(:,:) = zztmp * sbc_dcy( sf(jp_qsr)%fnow(:,:,1) ) * tmask(:,:,1) |
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| 301 | ELSE ; qsr(:,:) = zztmp * sf(jp_qsr)%fnow(:,:,1) * tmask(:,:,1) |
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| 302 | ENDIF |
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[888] | 303 | !CDIR COLLAPSE |
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[2528] | 304 | zqlw(:,:) = ( sf(jp_qlw)%fnow(:,:,1) - Stef * zst(:,:)*zst(:,:)*zst(:,:)*zst(:,:) ) * tmask(:,:,1) ! Long Wave |
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[888] | 305 | ! ----------------------------------------------------------------------------- ! |
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| 306 | ! II Turbulent FLUXES ! |
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| 307 | ! ----------------------------------------------------------------------------- ! |
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| 308 | |
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| 309 | ! ... specific humidity at SST and IST |
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| 310 | !CDIR NOVERRCHK |
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| 311 | !CDIR COLLAPSE |
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| 312 | zqsatw(:,:) = zcoef_qsatw * EXP( -5107.4 / zst(:,:) ) |
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| 313 | |
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| 314 | ! ... NCAR Bulk formulae, computation of Cd, Ch, Ce at T-point : |
---|
| 315 | IF( ln_2m ) THEN |
---|
| 316 | !! If air temp. and spec. hum. are given at different height (2m) than wind (10m) : |
---|
[1025] | 317 | CALL TURB_CORE_2Z(2.,10., zst , sf(jp_tair)%fnow, & |
---|
| 318 | & zqsatw, sf(jp_humi)%fnow, wndm, & |
---|
| 319 | & Cd , Ch , Ce , & |
---|
| 320 | & zt_zu , zq_zu ) |
---|
[888] | 321 | ELSE |
---|
| 322 | !! If air temp. and spec. hum. are given at same height than wind (10m) : |
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| 323 | !gm bug? at the compiling phase, add a copy in temporary arrays... ==> check perf |
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[1025] | 324 | ! CALL TURB_CORE_1Z( 10., zst (:,:), sf(jp_tair)%fnow(:,:), & |
---|
| 325 | ! & zqsatw(:,:), sf(jp_humi)%fnow(:,:), wndm(:,:), & |
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| 326 | ! & Cd (:,:), Ch (:,:), Ce (:,:) ) |
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[888] | 327 | !gm bug |
---|
[2715] | 328 | ! ARPDBG - this won't compile with gfortran. Fix but check performance |
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| 329 | ! as per comment above. |
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| 330 | CALL TURB_CORE_1Z( 10., zst , sf(jp_tair)%fnow(:,:,1), & |
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| 331 | & zqsatw, sf(jp_humi)%fnow(:,:,1), wndm, & |
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[1025] | 332 | & Cd , Ch , Ce ) |
---|
[888] | 333 | ENDIF |
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| 334 | |
---|
[1695] | 335 | ! ... tau module, i and j component |
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| 336 | DO jj = 1, jpj |
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| 337 | DO ji = 1, jpi |
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| 338 | zztmp = rhoa * wndm(ji,jj) * Cd(ji,jj) |
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| 339 | taum (ji,jj) = zztmp * wndm (ji,jj) |
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| 340 | zwnd_i(ji,jj) = zztmp * zwnd_i(ji,jj) |
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| 341 | zwnd_j(ji,jj) = zztmp * zwnd_j(ji,jj) |
---|
| 342 | END DO |
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| 343 | END DO |
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[1705] | 344 | |
---|
| 345 | ! ... add the HF tau contribution to the wind stress module? |
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| 346 | IF( lhftau ) THEN |
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| 347 | !CDIR COLLAPSE |
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[2528] | 348 | taum(:,:) = taum(:,:) + sf(jp_tdif)%fnow(:,:,1) |
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[1705] | 349 | ENDIF |
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| 350 | CALL iom_put( "taum_oce", taum ) ! output wind stress module |
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| 351 | |
---|
[888] | 352 | ! ... utau, vtau at U- and V_points, resp. |
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| 353 | ! Note the use of 0.5*(2-umask) in order to unmask the stress along coastlines |
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| 354 | DO jj = 1, jpjm1 |
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| 355 | DO ji = 1, fs_jpim1 |
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| 356 | utau(ji,jj) = 0.5 * ( 2. - umask(ji,jj,1) ) * ( zwnd_i(ji,jj) + zwnd_i(ji+1,jj ) ) |
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| 357 | vtau(ji,jj) = 0.5 * ( 2. - vmask(ji,jj,1) ) * ( zwnd_j(ji,jj) + zwnd_j(ji ,jj+1) ) |
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| 358 | END DO |
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| 359 | END DO |
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| 360 | CALL lbc_lnk( utau(:,:), 'U', -1. ) |
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| 361 | CALL lbc_lnk( vtau(:,:), 'V', -1. ) |
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| 362 | |
---|
| 363 | ! Turbulent fluxes over ocean |
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| 364 | ! ----------------------------- |
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| 365 | IF( ln_2m ) THEN |
---|
| 366 | ! Values of temp. and hum. adjusted to 10m must be used instead of 2m values |
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[1025] | 367 | zevap(:,:) = MAX( 0.e0, rhoa *Ce(:,:)*( zqsatw(:,:) - zq_zu(:,:) ) * wndm(:,:) ) ! Evaporation |
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| 368 | zqsb (:,:) = rhoa*cpa*Ch(:,:)*( zst (:,:) - zt_zu(:,:) ) * wndm(:,:) ! Sensible Heat |
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[888] | 369 | ELSE |
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| 370 | !CDIR COLLAPSE |
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[2528] | 371 | zevap(:,:) = MAX( 0.e0, rhoa *Ce(:,:)*( zqsatw(:,:) - sf(jp_humi)%fnow(:,:,1) ) * wndm(:,:) ) ! Evaporation |
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[888] | 372 | !CDIR COLLAPSE |
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[2528] | 373 | zqsb (:,:) = rhoa*cpa*Ch(:,:)*( zst (:,:) - sf(jp_tair)%fnow(:,:,1) ) * wndm(:,:) ! Sensible Heat |
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[888] | 374 | ENDIF |
---|
| 375 | !CDIR COLLAPSE |
---|
| 376 | zqla (:,:) = Lv * zevap(:,:) ! Latent Heat |
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| 377 | |
---|
| 378 | IF(ln_ctl) THEN |
---|
[1025] | 379 | CALL prt_ctl( tab2d_1=zqla , clinfo1=' blk_oce_core: zqla : ', tab2d_2=Ce , clinfo2=' Ce : ' ) |
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| 380 | CALL prt_ctl( tab2d_1=zqsb , clinfo1=' blk_oce_core: zqsb : ', tab2d_2=Ch , clinfo2=' Ch : ' ) |
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| 381 | CALL prt_ctl( tab2d_1=zqlw , clinfo1=' blk_oce_core: zqlw : ', tab2d_2=qsr, clinfo2=' qsr : ' ) |
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| 382 | CALL prt_ctl( tab2d_1=zqsatw, clinfo1=' blk_oce_core: zqsatw : ', tab2d_2=zst, clinfo2=' zst : ' ) |
---|
| 383 | CALL prt_ctl( tab2d_1=utau , clinfo1=' blk_oce_core: utau : ', mask1=umask, & |
---|
| 384 | & tab2d_2=vtau , clinfo2= ' vtau : ' , mask2=vmask ) |
---|
| 385 | CALL prt_ctl( tab2d_1=wndm , clinfo1=' blk_oce_core: wndm : ') |
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| 386 | CALL prt_ctl( tab2d_1=zst , clinfo1=' blk_oce_core: zst : ') |
---|
[888] | 387 | ENDIF |
---|
| 388 | |
---|
| 389 | ! ----------------------------------------------------------------------------- ! |
---|
| 390 | ! III Total FLUXES ! |
---|
| 391 | ! ----------------------------------------------------------------------------- ! |
---|
| 392 | |
---|
| 393 | !CDIR COLLAPSE |
---|
[3625] | 394 | emp (:,:) = ( zevap(:,:) & ! mass flux (evap. - precip.) |
---|
| 395 | & - sf(jp_prec)%fnow(:,:,1) * rn_pfac ) * tmask(:,:,1) |
---|
[888] | 396 | !CDIR COLLAPSE |
---|
[3625] | 397 | qns(:,:) = zqlw(:,:) - zqsb(:,:) - zqla(:,:) & ! Downward Non Solar flux |
---|
| 398 | & - sf(jp_snow)%fnow(:,:,1) * lfus & ! remove latent melting heat for solid precip |
---|
| 399 | & - zevap(:,:) * pst(:,:) * rcp & ! remove evap heat content at SST |
---|
| 400 | & + ( sf(jp_prec)%fnow(:,:,1) - sf(jp_snow)%fnow(:,:,1) ) & ! add liquid precip heat content at Tair |
---|
| 401 | & * ( sf(jp_tair)%fnow(:,:,1) - rt0 ) * rcp & |
---|
| 402 | & + sf(jp_snow)%fnow(:,:,1) & ! add solid precip heat content at min(Tair,Tsnow) |
---|
| 403 | & * ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic |
---|
[888] | 404 | ! |
---|
[1482] | 405 | CALL iom_put( "qlw_oce", zqlw ) ! output downward longwave heat over the ocean |
---|
| 406 | CALL iom_put( "qsb_oce", - zqsb ) ! output downward sensible heat over the ocean |
---|
| 407 | CALL iom_put( "qla_oce", - zqla ) ! output downward latent heat over the ocean |
---|
[3625] | 408 | CALL iom_put( "qhc_oce", qns-zqlw+zqsb+zqla ) ! output downward heat content of E-P over the ocean |
---|
[1482] | 409 | CALL iom_put( "qns_oce", qns ) ! output downward non solar heat over the ocean |
---|
| 410 | ! |
---|
| 411 | IF(ln_ctl) THEN |
---|
| 412 | CALL prt_ctl(tab2d_1=zqsb , clinfo1=' blk_oce_core: zqsb : ', tab2d_2=zqlw , clinfo2=' zqlw : ') |
---|
| 413 | CALL prt_ctl(tab2d_1=zqla , clinfo1=' blk_oce_core: zqla : ', tab2d_2=qsr , clinfo2=' qsr : ') |
---|
| 414 | CALL prt_ctl(tab2d_1=pst , clinfo1=' blk_oce_core: pst : ', tab2d_2=emp , clinfo2=' emp : ') |
---|
| 415 | CALL prt_ctl(tab2d_1=utau , clinfo1=' blk_oce_core: utau : ', mask1=umask, & |
---|
| 416 | & tab2d_2=vtau , clinfo2= ' vtau : ' , mask2=vmask ) |
---|
| 417 | ENDIF |
---|
| 418 | ! |
---|
[3294] | 419 | CALL wrk_dealloc( jpi,jpj, zwnd_i, zwnd_j, zqsatw, zqlw, zqsb, zqla, zevap ) |
---|
| 420 | CALL wrk_dealloc( jpi,jpj, Cd, Ch, Ce, zst, zt_zu, zq_zu ) |
---|
[2715] | 421 | ! |
---|
[3294] | 422 | IF( nn_timing == 1 ) CALL timing_stop('blk_oce_core') |
---|
| 423 | ! |
---|
[888] | 424 | END SUBROUTINE blk_oce_core |
---|
| 425 | |
---|
| 426 | |
---|
| 427 | SUBROUTINE blk_ice_core( pst , pui , pvi , palb , & |
---|
| 428 | & p_taui, p_tauj, p_qns , p_qsr, & |
---|
| 429 | & p_qla , p_dqns, p_dqla, & |
---|
| 430 | & p_tpr , p_spr , & |
---|
[1270] | 431 | & p_fr1 , p_fr2 , cd_grid, pdim ) |
---|
[888] | 432 | !!--------------------------------------------------------------------- |
---|
| 433 | !! *** ROUTINE blk_ice_core *** |
---|
| 434 | !! |
---|
| 435 | !! ** Purpose : provide the surface boundary condition over sea-ice |
---|
| 436 | !! |
---|
| 437 | !! ** Method : compute momentum, heat and freshwater exchanged |
---|
| 438 | !! between atmosphere and sea-ice using CORE bulk |
---|
| 439 | !! formulea, ice variables and read atmmospheric fields. |
---|
| 440 | !! NB: ice drag coefficient is assumed to be a constant |
---|
| 441 | !! |
---|
| 442 | !! caution : the net upward water flux has with mm/day unit |
---|
| 443 | !!--------------------------------------------------------------------- |
---|
[2715] | 444 | REAL(wp), DIMENSION(:,:,:), INTENT(in ) :: pst ! ice surface temperature (>0, =rt0 over land) [Kelvin] |
---|
| 445 | REAL(wp), DIMENSION(:,:) , INTENT(in ) :: pui ! ice surface velocity (i- and i- components [m/s] |
---|
| 446 | REAL(wp), DIMENSION(:,:) , INTENT(in ) :: pvi ! at I-point (B-grid) or U & V-point (C-grid) |
---|
| 447 | REAL(wp), DIMENSION(:,:,:), INTENT(in ) :: palb ! ice albedo (clear sky) (alb_ice_cs) [%] |
---|
| 448 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_taui ! i- & j-components of surface ice stress [N/m2] |
---|
| 449 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_tauj ! at I-point (B-grid) or U & V-point (C-grid) |
---|
| 450 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qns ! non solar heat flux over ice (T-point) [W/m2] |
---|
| 451 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qsr ! solar heat flux over ice (T-point) [W/m2] |
---|
| 452 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qla ! latent heat flux over ice (T-point) [W/m2] |
---|
| 453 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_dqns ! non solar heat sensistivity (T-point) [W/m2] |
---|
| 454 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_dqla ! latent heat sensistivity (T-point) [W/m2] |
---|
| 455 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_tpr ! total precipitation (T-point) [Kg/m2/s] |
---|
| 456 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_spr ! solid precipitation (T-point) [Kg/m2/s] |
---|
| 457 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_fr1 ! 1sr fraction of qsr penetration in ice (T-point) [%] |
---|
| 458 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_fr2 ! 2nd fraction of qsr penetration in ice (T-point) [%] |
---|
| 459 | CHARACTER(len=1) , INTENT(in ) :: cd_grid ! ice grid ( C or B-grid) |
---|
| 460 | INTEGER , INTENT(in ) :: pdim ! number of ice categories |
---|
| 461 | !! |
---|
[888] | 462 | INTEGER :: ji, jj, jl ! dummy loop indices |
---|
| 463 | INTEGER :: ijpl ! number of ice categories (size of 3rd dim of input arrays) |
---|
| 464 | REAL(wp) :: zst2, zst3 |
---|
| 465 | REAL(wp) :: zcoef_wnorm, zcoef_wnorm2, zcoef_dqlw, zcoef_dqla, zcoef_dqsb |
---|
[2528] | 466 | REAL(wp) :: zztmp ! temporary variable |
---|
[888] | 467 | REAL(wp) :: zcoef_frca ! fractional cloud amount |
---|
| 468 | REAL(wp) :: zwnorm_f, zwndi_f , zwndj_f ! relative wind module and components at F-point |
---|
| 469 | REAL(wp) :: zwndi_t , zwndj_t ! relative wind components at T-point |
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[2715] | 470 | !! |
---|
[3294] | 471 | REAL(wp), DIMENSION(:,:) , POINTER :: z_wnds_t ! wind speed ( = | U10m - U_ice | ) at T-point |
---|
[2715] | 472 | REAL(wp), DIMENSION(:,:,:), POINTER :: z_qlw ! long wave heat flux over ice |
---|
| 473 | REAL(wp), DIMENSION(:,:,:), POINTER :: z_qsb ! sensible heat flux over ice |
---|
| 474 | REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqlw ! long wave heat sensitivity over ice |
---|
| 475 | REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqsb ! sensible heat sensitivity over ice |
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[888] | 476 | !!--------------------------------------------------------------------- |
---|
[3294] | 477 | ! |
---|
| 478 | IF( nn_timing == 1 ) CALL timing_start('blk_ice_core') |
---|
| 479 | ! |
---|
| 480 | CALL wrk_alloc( jpi,jpj, z_wnds_t ) |
---|
| 481 | CALL wrk_alloc( jpi,jpj,pdim, z_qlw, z_qsb, z_dqlw, z_dqsb ) |
---|
[888] | 482 | |
---|
[1270] | 483 | ijpl = pdim ! number of ice categories |
---|
[888] | 484 | |
---|
| 485 | ! local scalars ( place there for vector optimisation purposes) |
---|
[2528] | 486 | zcoef_wnorm = rhoa * Cice |
---|
[888] | 487 | zcoef_wnorm2 = rhoa * Cice * 0.5 |
---|
[2528] | 488 | zcoef_dqlw = 4.0 * 0.95 * Stef |
---|
| 489 | zcoef_dqla = -Ls * Cice * 11637800. * (-5897.8) |
---|
| 490 | zcoef_dqsb = rhoa * cpa * Cice |
---|
| 491 | zcoef_frca = 1.0 - 0.3 |
---|
[888] | 492 | |
---|
| 493 | !!gm brutal.... |
---|
| 494 | z_wnds_t(:,:) = 0.e0 |
---|
| 495 | p_taui (:,:) = 0.e0 |
---|
| 496 | p_tauj (:,:) = 0.e0 |
---|
| 497 | !!gm end |
---|
| 498 | |
---|
[2777] | 499 | #if defined key_lim3 |
---|
| 500 | tatm_ice(:,:) = sf(jp_tair)%fnow(:,:,1) ! LIM3: make Tair available in sea-ice. WARNING allocated after call to ice_init |
---|
| 501 | #endif |
---|
[888] | 502 | ! ----------------------------------------------------------------------------- ! |
---|
| 503 | ! Wind components and module relative to the moving ocean ( U10m - U_ice ) ! |
---|
| 504 | ! ----------------------------------------------------------------------------- ! |
---|
| 505 | SELECT CASE( cd_grid ) |
---|
[2528] | 506 | CASE( 'I' ) ! B-grid ice dynamics : I-point (i.e. F-point with sea-ice indexation) |
---|
[888] | 507 | ! and scalar wind at T-point ( = | U10m - U_ice | ) (masked) |
---|
| 508 | !CDIR NOVERRCHK |
---|
| 509 | DO jj = 2, jpjm1 |
---|
[2528] | 510 | DO ji = 2, jpim1 ! B grid : NO vector opt |
---|
[888] | 511 | ! ... scalar wind at I-point (fld being at T-point) |
---|
[2528] | 512 | zwndi_f = 0.25 * ( sf(jp_wndi)%fnow(ji-1,jj ,1) + sf(jp_wndi)%fnow(ji ,jj ,1) & |
---|
| 513 | & + sf(jp_wndi)%fnow(ji-1,jj-1,1) + sf(jp_wndi)%fnow(ji ,jj-1,1) ) - pui(ji,jj) |
---|
| 514 | zwndj_f = 0.25 * ( sf(jp_wndj)%fnow(ji-1,jj ,1) + sf(jp_wndj)%fnow(ji ,jj ,1) & |
---|
| 515 | & + sf(jp_wndj)%fnow(ji-1,jj-1,1) + sf(jp_wndj)%fnow(ji ,jj-1,1) ) - pvi(ji,jj) |
---|
[888] | 516 | zwnorm_f = zcoef_wnorm * SQRT( zwndi_f * zwndi_f + zwndj_f * zwndj_f ) |
---|
| 517 | ! ... ice stress at I-point |
---|
| 518 | p_taui(ji,jj) = zwnorm_f * zwndi_f |
---|
| 519 | p_tauj(ji,jj) = zwnorm_f * zwndj_f |
---|
| 520 | ! ... scalar wind at T-point (fld being at T-point) |
---|
[2528] | 521 | zwndi_t = sf(jp_wndi)%fnow(ji,jj,1) - 0.25 * ( pui(ji,jj+1) + pui(ji+1,jj+1) & |
---|
| 522 | & + pui(ji,jj ) + pui(ji+1,jj ) ) |
---|
| 523 | zwndj_t = sf(jp_wndj)%fnow(ji,jj,1) - 0.25 * ( pvi(ji,jj+1) + pvi(ji+1,jj+1) & |
---|
| 524 | & + pvi(ji,jj ) + pvi(ji+1,jj ) ) |
---|
[888] | 525 | z_wnds_t(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1) |
---|
| 526 | END DO |
---|
| 527 | END DO |
---|
| 528 | CALL lbc_lnk( p_taui , 'I', -1. ) |
---|
| 529 | CALL lbc_lnk( p_tauj , 'I', -1. ) |
---|
| 530 | CALL lbc_lnk( z_wnds_t, 'T', 1. ) |
---|
| 531 | ! |
---|
| 532 | CASE( 'C' ) ! C-grid ice dynamics : U & V-points (same as ocean) |
---|
| 533 | #if defined key_vectopt_loop |
---|
| 534 | !CDIR COLLAPSE |
---|
| 535 | #endif |
---|
| 536 | DO jj = 2, jpj |
---|
| 537 | DO ji = fs_2, jpi ! vect. opt. |
---|
[2528] | 538 | zwndi_t = ( sf(jp_wndi)%fnow(ji,jj,1) - 0.5 * ( pui(ji-1,jj ) + pui(ji,jj) ) ) |
---|
| 539 | zwndj_t = ( sf(jp_wndj)%fnow(ji,jj,1) - 0.5 * ( pvi(ji ,jj-1) + pvi(ji,jj) ) ) |
---|
[888] | 540 | z_wnds_t(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1) |
---|
| 541 | END DO |
---|
| 542 | END DO |
---|
| 543 | #if defined key_vectopt_loop |
---|
| 544 | !CDIR COLLAPSE |
---|
| 545 | #endif |
---|
| 546 | DO jj = 2, jpjm1 |
---|
| 547 | DO ji = fs_2, fs_jpim1 ! vect. opt. |
---|
[2528] | 548 | p_taui(ji,jj) = zcoef_wnorm2 * ( z_wnds_t(ji+1,jj ) + z_wnds_t(ji,jj) ) & |
---|
| 549 | & * ( 0.5 * (sf(jp_wndi)%fnow(ji+1,jj,1) + sf(jp_wndi)%fnow(ji,jj,1) ) - pui(ji,jj) ) |
---|
| 550 | p_tauj(ji,jj) = zcoef_wnorm2 * ( z_wnds_t(ji,jj+1 ) + z_wnds_t(ji,jj) ) & |
---|
| 551 | & * ( 0.5 * (sf(jp_wndj)%fnow(ji,jj+1,1) + sf(jp_wndj)%fnow(ji,jj,1) ) - pvi(ji,jj) ) |
---|
[888] | 552 | END DO |
---|
| 553 | END DO |
---|
| 554 | CALL lbc_lnk( p_taui , 'U', -1. ) |
---|
| 555 | CALL lbc_lnk( p_tauj , 'V', -1. ) |
---|
| 556 | CALL lbc_lnk( z_wnds_t, 'T', 1. ) |
---|
| 557 | ! |
---|
| 558 | END SELECT |
---|
| 559 | |
---|
[2528] | 560 | zztmp = 1. / ( 1. - albo ) |
---|
[888] | 561 | ! ! ========================== ! |
---|
| 562 | DO jl = 1, ijpl ! Loop over ice categories ! |
---|
| 563 | ! ! ========================== ! |
---|
| 564 | !CDIR NOVERRCHK |
---|
| 565 | !CDIR COLLAPSE |
---|
| 566 | DO jj = 1 , jpj |
---|
| 567 | !CDIR NOVERRCHK |
---|
| 568 | DO ji = 1, jpi |
---|
| 569 | ! ----------------------------! |
---|
| 570 | ! I Radiative FLUXES ! |
---|
| 571 | ! ----------------------------! |
---|
| 572 | zst2 = pst(ji,jj,jl) * pst(ji,jj,jl) |
---|
| 573 | zst3 = pst(ji,jj,jl) * zst2 |
---|
| 574 | ! Short Wave (sw) |
---|
[2528] | 575 | p_qsr(ji,jj,jl) = zztmp * ( 1. - palb(ji,jj,jl) ) * qsr(ji,jj) |
---|
[888] | 576 | ! Long Wave (lw) |
---|
[2528] | 577 | z_qlw(ji,jj,jl) = 0.95 * ( sf(jp_qlw)%fnow(ji,jj,1) - Stef * pst(ji,jj,jl) * zst3 ) * tmask(ji,jj,1) |
---|
[888] | 578 | ! lw sensitivity |
---|
| 579 | z_dqlw(ji,jj,jl) = zcoef_dqlw * zst3 |
---|
| 580 | |
---|
| 581 | ! ----------------------------! |
---|
| 582 | ! II Turbulent FLUXES ! |
---|
| 583 | ! ----------------------------! |
---|
| 584 | |
---|
| 585 | ! ... turbulent heat fluxes |
---|
| 586 | ! Sensible Heat |
---|
[2528] | 587 | z_qsb(ji,jj,jl) = rhoa * cpa * Cice * z_wnds_t(ji,jj) * ( pst(ji,jj,jl) - sf(jp_tair)%fnow(ji,jj,1) ) |
---|
[888] | 588 | ! Latent Heat |
---|
| 589 | p_qla(ji,jj,jl) = MAX( 0.e0, rhoa * Ls * Cice * z_wnds_t(ji,jj) & |
---|
[2528] | 590 | & * ( 11637800. * EXP( -5897.8 / pst(ji,jj,jl) ) / rhoa - sf(jp_humi)%fnow(ji,jj,1) ) ) |
---|
[888] | 591 | ! Latent heat sensitivity for ice (Dqla/Dt) |
---|
| 592 | p_dqla(ji,jj,jl) = zcoef_dqla * z_wnds_t(ji,jj) / ( zst2 ) * EXP( -5897.8 / pst(ji,jj,jl) ) |
---|
| 593 | ! Sensible heat sensitivity (Dqsb_ice/Dtn_ice) |
---|
| 594 | z_dqsb(ji,jj,jl) = zcoef_dqsb * z_wnds_t(ji,jj) |
---|
| 595 | |
---|
| 596 | ! ----------------------------! |
---|
| 597 | ! III Total FLUXES ! |
---|
| 598 | ! ----------------------------! |
---|
| 599 | ! Downward Non Solar flux |
---|
| 600 | p_qns (ji,jj,jl) = z_qlw (ji,jj,jl) - z_qsb (ji,jj,jl) - p_qla (ji,jj,jl) |
---|
| 601 | ! Total non solar heat flux sensitivity for ice |
---|
| 602 | p_dqns(ji,jj,jl) = - ( z_dqlw(ji,jj,jl) + z_dqsb(ji,jj,jl) + p_dqla(ji,jj,jl) ) |
---|
| 603 | END DO |
---|
| 604 | ! |
---|
| 605 | END DO |
---|
| 606 | ! |
---|
| 607 | END DO |
---|
| 608 | ! |
---|
| 609 | !-------------------------------------------------------------------- |
---|
| 610 | ! FRACTIONs of net shortwave radiation which is not absorbed in the |
---|
| 611 | ! thin surface layer and penetrates inside the ice cover |
---|
| 612 | ! ( Maykut and Untersteiner, 1971 ; Ebert and Curry, 1993 ) |
---|
| 613 | |
---|
| 614 | !CDIR COLLAPSE |
---|
| 615 | p_fr1(:,:) = ( 0.18 * ( 1.0 - zcoef_frca ) + 0.35 * zcoef_frca ) |
---|
| 616 | !CDIR COLLAPSE |
---|
| 617 | p_fr2(:,:) = ( 0.82 * ( 1.0 - zcoef_frca ) + 0.65 * zcoef_frca ) |
---|
| 618 | |
---|
| 619 | !CDIR COLLAPSE |
---|
[2528] | 620 | p_tpr(:,:) = sf(jp_prec)%fnow(:,:,1) * rn_pfac ! total precipitation [kg/m2/s] |
---|
[888] | 621 | !CDIR COLLAPSE |
---|
[2528] | 622 | p_spr(:,:) = sf(jp_snow)%fnow(:,:,1) * rn_pfac ! solid precipitation [kg/m2/s] |
---|
[1601] | 623 | CALL iom_put( 'snowpre', p_spr ) ! Snow precipitation |
---|
[888] | 624 | ! |
---|
| 625 | IF(ln_ctl) THEN |
---|
| 626 | CALL prt_ctl(tab3d_1=p_qla , clinfo1=' blk_ice_core: p_qla : ', tab3d_2=z_qsb , clinfo2=' z_qsb : ', kdim=ijpl) |
---|
| 627 | CALL prt_ctl(tab3d_1=z_qlw , clinfo1=' blk_ice_core: z_qlw : ', tab3d_2=p_dqla , clinfo2=' p_dqla : ', kdim=ijpl) |
---|
| 628 | CALL prt_ctl(tab3d_1=z_dqsb , clinfo1=' blk_ice_core: z_dqsb : ', tab3d_2=z_dqlw , clinfo2=' z_dqlw : ', kdim=ijpl) |
---|
| 629 | CALL prt_ctl(tab3d_1=p_dqns , clinfo1=' blk_ice_core: p_dqns : ', tab3d_2=p_qsr , clinfo2=' p_qsr : ', kdim=ijpl) |
---|
| 630 | CALL prt_ctl(tab3d_1=pst , clinfo1=' blk_ice_core: pst : ', tab3d_2=p_qns , clinfo2=' p_qns : ', kdim=ijpl) |
---|
| 631 | CALL prt_ctl(tab2d_1=p_tpr , clinfo1=' blk_ice_core: p_tpr : ', tab2d_2=p_spr , clinfo2=' p_spr : ') |
---|
| 632 | CALL prt_ctl(tab2d_1=p_taui , clinfo1=' blk_ice_core: p_taui : ', tab2d_2=p_tauj , clinfo2=' p_tauj : ') |
---|
| 633 | CALL prt_ctl(tab2d_1=z_wnds_t, clinfo1=' blk_ice_core: z_wnds_t : ') |
---|
| 634 | ENDIF |
---|
| 635 | |
---|
[3294] | 636 | CALL wrk_dealloc( jpi,jpj, z_wnds_t ) |
---|
| 637 | CALL wrk_dealloc( jpi,jpj,pdim, z_qlw, z_qsb, z_dqlw, z_dqsb ) |
---|
[2715] | 638 | ! |
---|
[3294] | 639 | IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core') |
---|
| 640 | ! |
---|
[888] | 641 | END SUBROUTINE blk_ice_core |
---|
| 642 | |
---|
| 643 | |
---|
| 644 | SUBROUTINE TURB_CORE_1Z(zu, sst, T_a, q_sat, q_a, & |
---|
[2715] | 645 | & dU , Cd , Ch , Ce ) |
---|
[888] | 646 | !!---------------------------------------------------------------------- |
---|
| 647 | !! *** ROUTINE turb_core *** |
---|
| 648 | !! |
---|
| 649 | !! ** Purpose : Computes turbulent transfert coefficients of surface |
---|
| 650 | !! fluxes according to Large & Yeager (2004) |
---|
| 651 | !! |
---|
| 652 | !! ** Method : I N E R T I A L D I S S I P A T I O N M E T H O D |
---|
| 653 | !! Momentum, Latent and sensible heat exchange coefficients |
---|
| 654 | !! Caution: this procedure should only be used in cases when air |
---|
| 655 | !! temperature (T_air), air specific humidity (q_air) and wind (dU) |
---|
| 656 | !! are provided at the same height 'zzu'! |
---|
| 657 | !! |
---|
[2715] | 658 | !! References : Large & Yeager, 2004 : ??? |
---|
[888] | 659 | !!---------------------------------------------------------------------- |
---|
[2715] | 660 | REAL(wp) , INTENT(in ) :: zu ! altitude of wind measurement [m] |
---|
| 661 | REAL(wp), DIMENSION(:,:), INTENT(in ) :: sst ! sea surface temperature [Kelvin] |
---|
| 662 | REAL(wp), DIMENSION(:,:), INTENT(in ) :: T_a ! potential air temperature [Kelvin] |
---|
| 663 | REAL(wp), DIMENSION(:,:), INTENT(in ) :: q_sat ! sea surface specific humidity [kg/kg] |
---|
| 664 | REAL(wp), DIMENSION(:,:), INTENT(in ) :: q_a ! specific air humidity [kg/kg] |
---|
| 665 | REAL(wp), DIMENSION(:,:), INTENT(in ) :: dU ! wind module |U(zu)-U(0)| [m/s] |
---|
| 666 | REAL(wp), DIMENSION(:,:), INTENT( out) :: Cd ! transfert coefficient for momentum (tau) |
---|
| 667 | REAL(wp), DIMENSION(:,:), INTENT( out) :: Ch ! transfert coefficient for temperature (Q_sens) |
---|
| 668 | REAL(wp), DIMENSION(:,:), INTENT( out) :: Ce ! transfert coefficient for evaporation (Q_lat) |
---|
[888] | 669 | !! |
---|
| 670 | INTEGER :: j_itt |
---|
[2715] | 671 | INTEGER , PARAMETER :: nb_itt = 3 |
---|
| 672 | REAL(wp), PARAMETER :: grav = 9.8 ! gravity |
---|
| 673 | REAL(wp), PARAMETER :: kappa = 0.4 ! von Karman s constant |
---|
[3294] | 674 | |
---|
| 675 | REAL(wp), DIMENSION(:,:), POINTER :: dU10 ! dU [m/s] |
---|
| 676 | REAL(wp), DIMENSION(:,:), POINTER :: dT ! air/sea temperature differeence [K] |
---|
| 677 | REAL(wp), DIMENSION(:,:), POINTER :: dq ! air/sea humidity difference [K] |
---|
| 678 | REAL(wp), DIMENSION(:,:), POINTER :: Cd_n10 ! 10m neutral drag coefficient |
---|
| 679 | REAL(wp), DIMENSION(:,:), POINTER :: Ce_n10 ! 10m neutral latent coefficient |
---|
| 680 | REAL(wp), DIMENSION(:,:), POINTER :: Ch_n10 ! 10m neutral sensible coefficient |
---|
| 681 | REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd_n10 ! root square of Cd_n10 |
---|
| 682 | REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd ! root square of Cd |
---|
| 683 | REAL(wp), DIMENSION(:,:), POINTER :: T_vpot ! virtual potential temperature [K] |
---|
| 684 | REAL(wp), DIMENSION(:,:), POINTER :: T_star ! turbulent scale of tem. fluct. |
---|
| 685 | REAL(wp), DIMENSION(:,:), POINTER :: q_star ! turbulent humidity of temp. fluct. |
---|
| 686 | REAL(wp), DIMENSION(:,:), POINTER :: U_star ! turb. scale of velocity fluct. |
---|
| 687 | REAL(wp), DIMENSION(:,:), POINTER :: L ! Monin-Obukov length [m] |
---|
| 688 | REAL(wp), DIMENSION(:,:), POINTER :: zeta ! stability parameter at height zu |
---|
| 689 | REAL(wp), DIMENSION(:,:), POINTER :: U_n10 ! neutral wind velocity at 10m [m] |
---|
| 690 | REAL(wp), DIMENSION(:,:), POINTER :: xlogt, xct, zpsi_h, zpsi_m |
---|
| 691 | |
---|
| 692 | INTEGER , DIMENSION(:,:), POINTER :: stab ! 1st guess stability test integer |
---|
[2715] | 693 | !!---------------------------------------------------------------------- |
---|
[3294] | 694 | ! |
---|
| 695 | IF( nn_timing == 1 ) CALL timing_start('TURB_CORE_1Z') |
---|
| 696 | ! |
---|
| 697 | CALL wrk_alloc( jpi,jpj, stab ) ! integer |
---|
| 698 | CALL wrk_alloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) |
---|
| 699 | CALL wrk_alloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta, U_n10, xlogt, xct, zpsi_h, zpsi_m ) |
---|
[888] | 700 | |
---|
| 701 | !! * Start |
---|
| 702 | !! Air/sea differences |
---|
| 703 | dU10 = max(0.5, dU) ! we don't want to fall under 0.5 m/s |
---|
| 704 | dT = T_a - sst ! assuming that T_a is allready the potential temp. at zzu |
---|
| 705 | dq = q_a - q_sat |
---|
| 706 | !! |
---|
| 707 | !! Virtual potential temperature |
---|
| 708 | T_vpot = T_a*(1. + 0.608*q_a) |
---|
| 709 | !! |
---|
| 710 | !! Neutral Drag Coefficient |
---|
| 711 | stab = 0.5 + sign(0.5,dT) ! stable : stab = 1 ; unstable : stab = 0 |
---|
[3294] | 712 | IF ( ln_cdgw ) THEN |
---|
| 713 | cdn_wave = cdn_wave - rsmall*(tmask(:,:,1)-1) |
---|
| 714 | Cd_n10(:,:) = cdn_wave |
---|
| 715 | ELSE |
---|
| 716 | Cd_n10 = 1E-3 * ( 2.7/dU10 + 0.142 + dU10/13.09 ) ! L & Y eq. (6a) |
---|
| 717 | ENDIF |
---|
[888] | 718 | sqrt_Cd_n10 = sqrt(Cd_n10) |
---|
| 719 | Ce_n10 = 1E-3 * ( 34.6 * sqrt_Cd_n10 ) ! L & Y eq. (6b) |
---|
| 720 | Ch_n10 = 1E-3*sqrt_Cd_n10*(18*stab + 32.7*(1-stab)) ! L & Y eq. (6c), (6d) |
---|
| 721 | !! |
---|
| 722 | !! Initializing transfert coefficients with their first guess neutral equivalents : |
---|
| 723 | Cd = Cd_n10 ; Ce = Ce_n10 ; Ch = Ch_n10 ; sqrt_Cd = sqrt(Cd) |
---|
| 724 | |
---|
| 725 | !! * Now starting iteration loop |
---|
| 726 | DO j_itt=1, nb_itt |
---|
| 727 | !! Turbulent scales : |
---|
| 728 | U_star = sqrt_Cd*dU10 ! L & Y eq. (7a) |
---|
| 729 | T_star = Ch/sqrt_Cd*dT ! L & Y eq. (7b) |
---|
| 730 | q_star = Ce/sqrt_Cd*dq ! L & Y eq. (7c) |
---|
| 731 | |
---|
| 732 | !! Estimate the Monin-Obukov length : |
---|
| 733 | L = (U_star**2)/( kappa*grav*(T_star/T_vpot + q_star/(q_a + 1./0.608)) ) |
---|
| 734 | |
---|
| 735 | !! Stability parameters : |
---|
[2715] | 736 | zeta = zu/L ; zeta = sign( min(abs(zeta),10.0), zeta ) |
---|
| 737 | zpsi_h = psi_h(zeta) |
---|
| 738 | zpsi_m = psi_m(zeta) |
---|
[888] | 739 | |
---|
[3294] | 740 | IF ( ln_cdgw ) THEN |
---|
| 741 | sqrt_Cd=kappa/((kappa/sqrt_Cd_n10) - zpsi_m) ; Cd=sqrt_Cd*sqrt_Cd; |
---|
| 742 | ELSE |
---|
| 743 | !! Shifting the wind speed to 10m and neutral stability : |
---|
| 744 | U_n10 = dU10*1./(1. + sqrt_Cd_n10/kappa*(log(zu/10.) - zpsi_m)) ! L & Y eq. (9a) |
---|
[888] | 745 | |
---|
[3294] | 746 | !! Updating the neutral 10m transfer coefficients : |
---|
| 747 | Cd_n10 = 1E-3 * (2.7/U_n10 + 0.142 + U_n10/13.09) ! L & Y eq. (6a) |
---|
| 748 | sqrt_Cd_n10 = sqrt(Cd_n10) |
---|
| 749 | Ce_n10 = 1E-3 * (34.6 * sqrt_Cd_n10) ! L & Y eq. (6b) |
---|
| 750 | stab = 0.5 + sign(0.5,zeta) |
---|
| 751 | Ch_n10 = 1E-3*sqrt_Cd_n10*(18.*stab + 32.7*(1-stab)) ! L & Y eq. (6c), (6d) |
---|
[888] | 752 | |
---|
[3294] | 753 | !! Shifting the neutral 10m transfer coefficients to ( zu , zeta ) : |
---|
| 754 | !! |
---|
| 755 | xct = 1. + sqrt_Cd_n10/kappa*(log(zu/10) - zpsi_m) |
---|
| 756 | Cd = Cd_n10/(xct*xct) ; sqrt_Cd = sqrt(Cd) |
---|
| 757 | ENDIF |
---|
[888] | 758 | !! |
---|
| 759 | xlogt = log(zu/10.) - zpsi_h |
---|
| 760 | !! |
---|
| 761 | xct = 1. + Ch_n10*xlogt/kappa/sqrt_Cd_n10 |
---|
| 762 | Ch = Ch_n10*sqrt_Cd/sqrt_Cd_n10/xct |
---|
| 763 | !! |
---|
| 764 | xct = 1. + Ce_n10*xlogt/kappa/sqrt_Cd_n10 |
---|
| 765 | Ce = Ce_n10*sqrt_Cd/sqrt_Cd_n10/xct |
---|
| 766 | !! |
---|
| 767 | END DO |
---|
| 768 | !! |
---|
[3294] | 769 | CALL wrk_dealloc( jpi,jpj, stab ) ! integer |
---|
| 770 | CALL wrk_dealloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) |
---|
| 771 | CALL wrk_dealloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta, U_n10, xlogt, xct, zpsi_h, zpsi_m ) |
---|
[2715] | 772 | ! |
---|
[3294] | 773 | IF( nn_timing == 1 ) CALL timing_stop('TURB_CORE_1Z') |
---|
| 774 | ! |
---|
[888] | 775 | END SUBROUTINE TURB_CORE_1Z |
---|
| 776 | |
---|
| 777 | |
---|
| 778 | SUBROUTINE TURB_CORE_2Z(zt, zu, sst, T_zt, q_sat, q_zt, dU, Cd, Ch, Ce, T_zu, q_zu) |
---|
| 779 | !!---------------------------------------------------------------------- |
---|
| 780 | !! *** ROUTINE turb_core *** |
---|
| 781 | !! |
---|
| 782 | !! ** Purpose : Computes turbulent transfert coefficients of surface |
---|
| 783 | !! fluxes according to Large & Yeager (2004). |
---|
| 784 | !! |
---|
| 785 | !! ** Method : I N E R T I A L D I S S I P A T I O N M E T H O D |
---|
| 786 | !! Momentum, Latent and sensible heat exchange coefficients |
---|
| 787 | !! Caution: this procedure should only be used in cases when air |
---|
| 788 | !! temperature (T_air) and air specific humidity (q_air) are at 2m |
---|
| 789 | !! whereas wind (dU) is at 10m. |
---|
| 790 | !! |
---|
[2715] | 791 | !! References : Large & Yeager, 2004 : ??? |
---|
[888] | 792 | !!---------------------------------------------------------------------- |
---|
[3294] | 793 | REAL(wp), INTENT(in ) :: zt ! height for T_zt and q_zt [m] |
---|
| 794 | REAL(wp), INTENT(in ) :: zu ! height for dU [m] |
---|
| 795 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: sst ! sea surface temperature [Kelvin] |
---|
| 796 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: T_zt ! potential air temperature [Kelvin] |
---|
| 797 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_sat ! sea surface specific humidity [kg/kg] |
---|
| 798 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_zt ! specific air humidity [kg/kg] |
---|
| 799 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: dU ! relative wind module |U(zu)-U(0)| [m/s] |
---|
| 800 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Cd ! transfer coefficient for momentum (tau) |
---|
| 801 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ch ! transfer coefficient for sensible heat (Q_sens) |
---|
| 802 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ce ! transfert coefficient for evaporation (Q_lat) |
---|
| 803 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: T_zu ! air temp. shifted at zu [K] |
---|
| 804 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: q_zu ! spec. hum. shifted at zu [kg/kg] |
---|
[888] | 805 | |
---|
| 806 | INTEGER :: j_itt |
---|
[3294] | 807 | INTEGER , PARAMETER :: nb_itt = 3 ! number of itterations |
---|
| 808 | REAL(wp), PARAMETER :: grav = 9.8 ! gravity |
---|
| 809 | REAL(wp), PARAMETER :: kappa = 0.4 ! von Karman's constant |
---|
| 810 | |
---|
| 811 | REAL(wp), DIMENSION(:,:), POINTER :: dU10 ! dU [m/s] |
---|
| 812 | REAL(wp), DIMENSION(:,:), POINTER :: dT ! air/sea temperature differeence [K] |
---|
| 813 | REAL(wp), DIMENSION(:,:), POINTER :: dq ! air/sea humidity difference [K] |
---|
| 814 | REAL(wp), DIMENSION(:,:), POINTER :: Cd_n10 ! 10m neutral drag coefficient |
---|
| 815 | REAL(wp), DIMENSION(:,:), POINTER :: Ce_n10 ! 10m neutral latent coefficient |
---|
| 816 | REAL(wp), DIMENSION(:,:), POINTER :: Ch_n10 ! 10m neutral sensible coefficient |
---|
| 817 | REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd_n10 ! root square of Cd_n10 |
---|
| 818 | REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd ! root square of Cd |
---|
| 819 | REAL(wp), DIMENSION(:,:), POINTER :: T_vpot ! virtual potential temperature [K] |
---|
| 820 | REAL(wp), DIMENSION(:,:), POINTER :: T_star ! turbulent scale of tem. fluct. |
---|
| 821 | REAL(wp), DIMENSION(:,:), POINTER :: q_star ! turbulent humidity of temp. fluct. |
---|
| 822 | REAL(wp), DIMENSION(:,:), POINTER :: U_star ! turb. scale of velocity fluct. |
---|
| 823 | REAL(wp), DIMENSION(:,:), POINTER :: L ! Monin-Obukov length [m] |
---|
| 824 | REAL(wp), DIMENSION(:,:), POINTER :: zeta_u ! stability parameter at height zu |
---|
| 825 | REAL(wp), DIMENSION(:,:), POINTER :: zeta_t ! stability parameter at height zt |
---|
| 826 | REAL(wp), DIMENSION(:,:), POINTER :: U_n10 ! neutral wind velocity at 10m [m] |
---|
| 827 | REAL(wp), DIMENSION(:,:), POINTER :: xlogt, xct, zpsi_hu, zpsi_ht, zpsi_m |
---|
| 828 | |
---|
| 829 | INTEGER , DIMENSION(:,:), POINTER :: stab ! 1st stability test integer |
---|
[2528] | 830 | !!---------------------------------------------------------------------- |
---|
[3294] | 831 | ! |
---|
| 832 | IF( nn_timing == 1 ) CALL timing_start('TURB_CORE_2Z') |
---|
| 833 | ! |
---|
| 834 | CALL wrk_alloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) |
---|
| 835 | CALL wrk_alloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta_u, zeta_t, U_n10 ) |
---|
| 836 | CALL wrk_alloc( jpi,jpj, xlogt, xct, zpsi_hu, zpsi_ht, zpsi_m ) |
---|
| 837 | CALL wrk_alloc( jpi,jpj, stab ) ! interger |
---|
[888] | 838 | |
---|
| 839 | !! Initial air/sea differences |
---|
| 840 | dU10 = max(0.5, dU) ! we don't want to fall under 0.5 m/s |
---|
| 841 | dT = T_zt - sst |
---|
| 842 | dq = q_zt - q_sat |
---|
| 843 | |
---|
| 844 | !! Neutral Drag Coefficient : |
---|
| 845 | stab = 0.5 + sign(0.5,dT) ! stab = 1 if dT > 0 -> STABLE |
---|
[3294] | 846 | IF( ln_cdgw ) THEN |
---|
| 847 | cdn_wave = cdn_wave - rsmall*(tmask(:,:,1)-1) |
---|
| 848 | Cd_n10(:,:) = cdn_wave |
---|
| 849 | ELSE |
---|
| 850 | Cd_n10 = 1E-3*( 2.7/dU10 + 0.142 + dU10/13.09 ) |
---|
| 851 | ENDIF |
---|
[888] | 852 | sqrt_Cd_n10 = sqrt(Cd_n10) |
---|
| 853 | Ce_n10 = 1E-3*( 34.6 * sqrt_Cd_n10 ) |
---|
| 854 | Ch_n10 = 1E-3*sqrt_Cd_n10*(18*stab + 32.7*(1 - stab)) |
---|
| 855 | |
---|
| 856 | !! Initializing transf. coeff. with their first guess neutral equivalents : |
---|
| 857 | Cd = Cd_n10 ; Ce = Ce_n10 ; Ch = Ch_n10 ; sqrt_Cd = sqrt(Cd) |
---|
| 858 | |
---|
| 859 | !! Initializing z_u values with z_t values : |
---|
| 860 | T_zu = T_zt ; q_zu = q_zt |
---|
| 861 | |
---|
| 862 | !! * Now starting iteration loop |
---|
| 863 | DO j_itt=1, nb_itt |
---|
| 864 | dT = T_zu - sst ; dq = q_zu - q_sat ! Updating air/sea differences |
---|
[2715] | 865 | T_vpot = T_zu*(1. + 0.608*q_zu) ! Updating virtual potential temperature at zu |
---|
[888] | 866 | U_star = sqrt_Cd*dU10 ! Updating turbulent scales : (L & Y eq. (7)) |
---|
| 867 | T_star = Ch/sqrt_Cd*dT ! |
---|
| 868 | q_star = Ce/sqrt_Cd*dq ! |
---|
| 869 | !! |
---|
| 870 | L = (U_star*U_star) & ! Estimate the Monin-Obukov length at height zu |
---|
[2715] | 871 | & / (kappa*grav/T_vpot*(T_star*(1.+0.608*q_zu) + 0.608*T_zu*q_star)) |
---|
[888] | 872 | !! Stability parameters : |
---|
| 873 | zeta_u = zu/L ; zeta_u = sign( min(abs(zeta_u),10.0), zeta_u ) |
---|
| 874 | zeta_t = zt/L ; zeta_t = sign( min(abs(zeta_t),10.0), zeta_t ) |
---|
| 875 | zpsi_hu = psi_h(zeta_u) |
---|
| 876 | zpsi_ht = psi_h(zeta_t) |
---|
| 877 | zpsi_m = psi_m(zeta_u) |
---|
| 878 | !! |
---|
| 879 | !! Shifting the wind speed to 10m and neutral stability : (L & Y eq.(9a)) |
---|
| 880 | ! U_n10 = dU10/(1. + sqrt_Cd_n10/kappa*(log(zu/10.) - psi_m(zeta_u))) |
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| 881 | U_n10 = dU10/(1. + sqrt_Cd_n10/kappa*(log(zu/10.) - zpsi_m)) |
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| 882 | !! |
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| 883 | !! Shifting temperature and humidity at zu : (L & Y eq. (9b-9c)) |
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| 884 | ! T_zu = T_zt - T_star/kappa*(log(zt/zu) + psi_h(zeta_u) - psi_h(zeta_t)) |
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| 885 | T_zu = T_zt - T_star/kappa*(log(zt/zu) + zpsi_hu - zpsi_ht) |
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| 886 | ! q_zu = q_zt - q_star/kappa*(log(zt/zu) + psi_h(zeta_u) - psi_h(zeta_t)) |
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| 887 | q_zu = q_zt - q_star/kappa*(log(zt/zu) + zpsi_hu - zpsi_ht) |
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| 888 | !! |
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| 889 | !! q_zu cannot have a negative value : forcing 0 |
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| 890 | stab = 0.5 + sign(0.5,q_zu) ; q_zu = stab*q_zu |
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| 891 | !! |
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[3294] | 892 | IF( ln_cdgw ) THEN |
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| 893 | sqrt_Cd=kappa/((kappa/sqrt_Cd_n10) - zpsi_m) ; Cd=sqrt_Cd*sqrt_Cd; |
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| 894 | ELSE |
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| 895 | !! Updating the neutral 10m transfer coefficients : |
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| 896 | Cd_n10 = 1E-3 * (2.7/U_n10 + 0.142 + U_n10/13.09) ! L & Y eq. (6a) |
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| 897 | sqrt_Cd_n10 = sqrt(Cd_n10) |
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| 898 | Ce_n10 = 1E-3 * (34.6 * sqrt_Cd_n10) ! L & Y eq. (6b) |
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| 899 | stab = 0.5 + sign(0.5,zeta_u) |
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| 900 | Ch_n10 = 1E-3*sqrt_Cd_n10*(18.*stab + 32.7*(1-stab)) ! L & Y eq. (6c-6d) |
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| 901 | !! |
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| 902 | !! |
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| 903 | !! Shifting the neutral 10m transfer coefficients to (zu,zeta_u) : |
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| 904 | xct = 1. + sqrt_Cd_n10/kappa*(log(zu/10.) - zpsi_m) |
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| 905 | Cd = Cd_n10/(xct*xct) ; sqrt_Cd = sqrt(Cd) |
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| 906 | ENDIF |
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[888] | 907 | !! |
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| 908 | xlogt = log(zu/10.) - zpsi_hu |
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| 909 | !! |
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| 910 | xct = 1. + Ch_n10*xlogt/kappa/sqrt_Cd_n10 |
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| 911 | Ch = Ch_n10*sqrt_Cd/sqrt_Cd_n10/xct |
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| 912 | !! |
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| 913 | xct = 1. + Ce_n10*xlogt/kappa/sqrt_Cd_n10 |
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| 914 | Ce = Ce_n10*sqrt_Cd/sqrt_Cd_n10/xct |
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| 915 | !! |
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| 916 | !! |
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| 917 | END DO |
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| 918 | !! |
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[3294] | 919 | CALL wrk_dealloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) |
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| 920 | CALL wrk_dealloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta_u, zeta_t, U_n10 ) |
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| 921 | CALL wrk_dealloc( jpi,jpj, xlogt, xct, zpsi_hu, zpsi_ht, zpsi_m ) |
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| 922 | CALL wrk_dealloc( jpi,jpj, stab ) ! interger |
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[2715] | 923 | ! |
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[3294] | 924 | IF( nn_timing == 1 ) CALL timing_stop('TURB_CORE_2Z') |
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| 925 | ! |
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[888] | 926 | END SUBROUTINE TURB_CORE_2Z |
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| 927 | |
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| 928 | |
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| 929 | FUNCTION psi_m(zta) !! Psis, L & Y eq. (8c), (8d), (8e) |
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[2715] | 930 | !------------------------------------------------------------------------------- |
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[888] | 931 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: zta |
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| 932 | |
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| 933 | REAL(wp), PARAMETER :: pi = 3.141592653589793_wp |
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| 934 | REAL(wp), DIMENSION(jpi,jpj) :: psi_m |
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[3294] | 935 | REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit |
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[2715] | 936 | !------------------------------------------------------------------------------- |
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| 937 | |
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[3294] | 938 | CALL wrk_alloc( jpi,jpj, X2, X, stabit ) |
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[2715] | 939 | |
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[888] | 940 | X2 = sqrt(abs(1. - 16.*zta)) ; X2 = max(X2 , 1.0) ; X = sqrt(X2) |
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| 941 | stabit = 0.5 + sign(0.5,zta) |
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[2715] | 942 | psi_m = -5.*zta*stabit & ! Stable |
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| 943 | & + (1. - stabit)*(2*log((1. + X)/2) + log((1. + X2)/2) - 2*atan(X) + pi/2) ! Unstable |
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| 944 | |
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[3294] | 945 | CALL wrk_dealloc( jpi,jpj, X2, X, stabit ) |
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[2715] | 946 | ! |
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[888] | 947 | END FUNCTION psi_m |
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| 948 | |
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| 949 | |
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[2715] | 950 | FUNCTION psi_h( zta ) !! Psis, L & Y eq. (8c), (8d), (8e) |
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| 951 | !------------------------------------------------------------------------------- |
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| 952 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: zta |
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| 953 | ! |
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| 954 | REAL(wp), DIMENSION(jpi,jpj) :: psi_h |
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[3294] | 955 | REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit |
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[2715] | 956 | !------------------------------------------------------------------------------- |
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| 957 | |
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[3294] | 958 | CALL wrk_alloc( jpi,jpj, X2, X, stabit ) |
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[2715] | 959 | |
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[888] | 960 | X2 = sqrt(abs(1. - 16.*zta)) ; X2 = max(X2 , 1.) ; X = sqrt(X2) |
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| 961 | stabit = 0.5 + sign(0.5,zta) |
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| 962 | psi_h = -5.*zta*stabit & ! Stable |
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[2715] | 963 | & + (1. - stabit)*(2.*log( (1. + X2)/2. )) ! Unstable |
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| 964 | |
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[3294] | 965 | CALL wrk_dealloc( jpi,jpj, X2, X, stabit ) |
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[2715] | 966 | ! |
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[888] | 967 | END FUNCTION psi_h |
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| 968 | |
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| 969 | !!====================================================================== |
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| 970 | END MODULE sbcblk_core |
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