[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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[4161] | 44 | USE lib_fortran ! to use key_nosignedzero |
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[888] | 45 | |
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| 46 | IMPLICIT NONE |
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| 47 | PRIVATE |
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| 48 | |
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[2715] | 49 | PUBLIC sbc_blk_core ! routine called in sbcmod module |
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| 50 | PUBLIC blk_ice_core ! routine called in sbc_ice_lim module |
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[4306] | 51 | PUBLIC blk_ice_meanqsr ! routine called in sbc_ice_lim module |
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[3294] | 52 | PUBLIC turb_core_2z ! routine calles in sbcblk_mfs module |
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[2715] | 53 | |
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[1705] | 54 | INTEGER , PARAMETER :: jpfld = 9 ! maximum number of files to read |
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[888] | 55 | INTEGER , PARAMETER :: jp_wndi = 1 ! index of 10m wind velocity (i-component) (m/s) at T-point |
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| 56 | INTEGER , PARAMETER :: jp_wndj = 2 ! index of 10m wind velocity (j-component) (m/s) at T-point |
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[3625] | 57 | INTEGER , PARAMETER :: jp_humi = 3 ! index of specific humidity ( % ) |
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[888] | 58 | INTEGER , PARAMETER :: jp_qsr = 4 ! index of solar heat (W/m2) |
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| 59 | INTEGER , PARAMETER :: jp_qlw = 5 ! index of Long wave (W/m2) |
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| 60 | INTEGER , PARAMETER :: jp_tair = 6 ! index of 10m air temperature (Kelvin) |
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| 61 | INTEGER , PARAMETER :: jp_prec = 7 ! index of total precipitation (rain+snow) (Kg/m2/s) |
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| 62 | INTEGER , PARAMETER :: jp_snow = 8 ! index of snow (solid prcipitation) (kg/m2/s) |
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[1705] | 63 | INTEGER , PARAMETER :: jp_tdif = 9 ! index of tau diff associated to HF tau (N/m2) at T-point |
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[2715] | 64 | |
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[888] | 65 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf ! structure of input fields (file informations, fields read) |
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| 66 | |
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[1601] | 67 | ! !!! CORE bulk parameters |
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[888] | 68 | REAL(wp), PARAMETER :: rhoa = 1.22 ! air density |
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| 69 | REAL(wp), PARAMETER :: cpa = 1000.5 ! specific heat of air |
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| 70 | REAL(wp), PARAMETER :: Lv = 2.5e6 ! latent heat of vaporization |
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| 71 | REAL(wp), PARAMETER :: Ls = 2.839e6 ! latent heat of sublimation |
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| 72 | REAL(wp), PARAMETER :: Stef = 5.67e-8 ! Stefan Boltzmann constant |
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[4161] | 73 | REAL(wp), PARAMETER :: Cice = 1.4e-3 ! iovi 1.63e-3 ! transfer coefficient over ice |
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[3625] | 74 | REAL(wp), PARAMETER :: albo = 0.066 ! ocean albedo assumed to be constant |
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[888] | 75 | |
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[2528] | 76 | ! !!* Namelist namsbc_core : CORE bulk parameters |
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[4147] | 77 | LOGICAL :: ln_2m ! logical flag for height of air temp. and hum |
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| 78 | LOGICAL :: ln_taudif ! logical flag to use the "mean of stress module - module of mean stress" data |
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| 79 | REAL(wp) :: rn_pfac ! multiplication factor for precipitation |
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[4161] | 80 | REAL(wp) :: rn_efac ! multiplication factor for evaporation (clem) |
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| 81 | REAL(wp) :: rn_vfac ! multiplication factor for ice/ocean velocity in the calculation of wind stress (clem) |
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[4245] | 82 | LOGICAL :: ln_bulk2z ! logical flag for case where z(q,t) and z(u) are specified in the namelist |
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| 83 | REAL(wp) :: rn_zqt ! z(q,t) : height of humidity and temperature measurements |
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| 84 | REAL(wp) :: rn_zu ! z(u) : height of wind measurements |
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[888] | 85 | |
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| 86 | !! * Substitutions |
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| 87 | # include "domzgr_substitute.h90" |
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| 88 | # include "vectopt_loop_substitute.h90" |
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| 89 | !!---------------------------------------------------------------------- |
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[2528] | 90 | !! NEMO/OPA 3.3 , NEMO-consortium (2010) |
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[1156] | 91 | !! $Id$ |
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[2528] | 92 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[888] | 93 | !!---------------------------------------------------------------------- |
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| 94 | CONTAINS |
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| 95 | |
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| 96 | SUBROUTINE sbc_blk_core( kt ) |
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| 97 | !!--------------------------------------------------------------------- |
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| 98 | !! *** ROUTINE sbc_blk_core *** |
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| 99 | !! |
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| 100 | !! ** Purpose : provide at each time step the surface ocean fluxes |
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| 101 | !! (momentum, heat, freshwater and runoff) |
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| 102 | !! |
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[1695] | 103 | !! ** Method : (1) READ each fluxes in NetCDF files: |
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| 104 | !! the 10m wind velocity (i-component) (m/s) at T-point |
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| 105 | !! the 10m wind velocity (j-component) (m/s) at T-point |
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[3625] | 106 | !! the 10m or 2m specific humidity ( % ) |
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[1695] | 107 | !! the solar heat (W/m2) |
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| 108 | !! the Long wave (W/m2) |
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[3625] | 109 | !! the 10m or 2m air temperature (Kelvin) |
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[1695] | 110 | !! the total precipitation (rain+snow) (Kg/m2/s) |
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| 111 | !! the snow (solid prcipitation) (kg/m2/s) |
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[3625] | 112 | !! the tau diff associated to HF tau (N/m2) at T-point (ln_taudif=T) |
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[1695] | 113 | !! (2) CALL blk_oce_core |
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[888] | 114 | !! |
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| 115 | !! C A U T I O N : never mask the surface stress fields |
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[3625] | 116 | !! the stress is assumed to be in the (i,j) mesh referential |
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[888] | 117 | !! |
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| 118 | !! ** Action : defined at each time-step at the air-sea interface |
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[1695] | 119 | !! - utau, vtau i- and j-component of the wind stress |
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[3625] | 120 | !! - taum, wndm wind stress and 10m wind modules at T-point |
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| 121 | !! - qns, qsr non-solar and solar heat fluxes |
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| 122 | !! - emp upward mass flux (evapo. - precip.) |
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| 123 | !! - sfx salt flux due to freezing/melting (non-zero only if ice is present) |
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| 124 | !! (set in limsbc(_2).F90) |
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[888] | 125 | !!---------------------------------------------------------------------- |
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[2715] | 126 | INTEGER, INTENT(in) :: kt ! ocean time step |
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[888] | 127 | !! |
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| 128 | INTEGER :: ierror ! return error code |
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[1200] | 129 | INTEGER :: ifpr ! dummy loop indice |
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[1705] | 130 | INTEGER :: jfld ! dummy loop arguments |
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[4147] | 131 | INTEGER :: ios ! Local integer output status for namelist read |
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[888] | 132 | !! |
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| 133 | CHARACTER(len=100) :: cn_dir ! Root directory for location of core files |
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| 134 | TYPE(FLD_N), DIMENSION(jpfld) :: slf_i ! array of namelist informations on the fields to read |
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[4161] | 135 | TYPE(FLD_N) :: sn_wndi, sn_wndj, sn_humi, sn_qsr ! informations about the fields to be read |
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| 136 | TYPE(FLD_N) :: sn_qlw , sn_tair, sn_prec, sn_snow ! " " |
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| 137 | TYPE(FLD_N) :: sn_tdif ! " " |
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| 138 | NAMELIST/namsbc_core/ cn_dir , ln_2m , ln_taudif, rn_pfac, rn_efac, rn_vfac, & |
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[1705] | 139 | & sn_wndi, sn_wndj, sn_humi , sn_qsr , & |
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[4245] | 140 | & sn_qlw , sn_tair, sn_prec , sn_snow, & |
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| 141 | & sn_tdif, rn_zqt , ln_bulk2z, rn_zu |
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[888] | 142 | !!--------------------------------------------------------------------- |
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| 143 | |
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| 144 | ! ! ====================== ! |
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| 145 | IF( kt == nit000 ) THEN ! First call kt=nit000 ! |
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| 146 | ! ! ====================== ! |
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[1601] | 147 | ! |
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[4147] | 148 | REWIND( numnam_ref ) ! Namelist namsbc_core in reference namelist : CORE bulk parameters |
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| 149 | READ ( numnam_ref, namsbc_core, IOSTAT = ios, ERR = 901) |
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| 150 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_core in reference namelist', lwp ) |
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| 151 | |
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| 152 | REWIND( numnam_cfg ) ! Namelist namsbc_core in configuration namelist : CORE bulk parameters |
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| 153 | READ ( numnam_cfg, namsbc_core, IOSTAT = ios, ERR = 902 ) |
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| 154 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_core in configuration namelist', lwp ) |
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| 155 | |
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[4624] | 156 | IF(lwm) WRITE ( numond, namsbc_core ) |
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[2528] | 157 | ! ! check: do we plan to use ln_dm2dc with non-daily forcing? |
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| 158 | IF( ln_dm2dc .AND. sn_qsr%nfreqh /= 24 ) & |
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| 159 | & CALL ctl_stop( 'sbc_blk_core: ln_dm2dc can be activated only with daily short-wave forcing' ) |
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| 160 | IF( ln_dm2dc .AND. sn_qsr%ln_tint ) THEN |
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| 161 | CALL ctl_warn( 'sbc_blk_core: ln_dm2dc is taking care of the temporal interpolation of daily qsr', & |
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| 162 | & ' ==> We force time interpolation = .false. for qsr' ) |
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| 163 | sn_qsr%ln_tint = .false. |
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| 164 | ENDIF |
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| 165 | ! ! store namelist information in an array |
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[888] | 166 | slf_i(jp_wndi) = sn_wndi ; slf_i(jp_wndj) = sn_wndj |
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| 167 | slf_i(jp_qsr ) = sn_qsr ; slf_i(jp_qlw ) = sn_qlw |
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| 168 | slf_i(jp_tair) = sn_tair ; slf_i(jp_humi) = sn_humi |
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| 169 | slf_i(jp_prec) = sn_prec ; slf_i(jp_snow) = sn_snow |
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[1705] | 170 | slf_i(jp_tdif) = sn_tdif |
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[2528] | 171 | ! |
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| 172 | lhftau = ln_taudif ! do we use HF tau information? |
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[1705] | 173 | jfld = jpfld - COUNT( (/.NOT. lhftau/) ) |
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| 174 | ! |
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[2528] | 175 | ALLOCATE( sf(jfld), STAT=ierror ) ! set sf structure |
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[2715] | 176 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_blk_core: unable to allocate sf structure' ) |
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[1705] | 177 | DO ifpr= 1, jfld |
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[2528] | 178 | ALLOCATE( sf(ifpr)%fnow(jpi,jpj,1) ) |
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[2715] | 179 | IF( slf_i(ifpr)%ln_tint ) ALLOCATE( sf(ifpr)%fdta(jpi,jpj,1,2) ) |
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[1200] | 180 | END DO |
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[2528] | 181 | ! ! fill sf with slf_i and control print |
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| 182 | 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] | 183 | ! |
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[3625] | 184 | sfx(:,:) = 0._wp ! salt flux; zero unless ice is present (computed in limsbc(_2).F90) |
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| 185 | ! |
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[888] | 186 | ENDIF |
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| 187 | |
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[3625] | 188 | CALL fld_read( kt, nn_fsbc, sf ) ! input fields provided at the current time-step |
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[888] | 189 | |
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[3625] | 190 | ! ! compute the surface ocean fluxes using CORE bulk formulea |
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[3680] | 191 | IF( MOD( kt - 1, nn_fsbc ) == 0 ) CALL blk_oce_core( kt, sf, sst_m, ssu_m, ssv_m ) |
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[3294] | 192 | |
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[4306] | 193 | ! If diurnal cycle is activated, compute a daily mean short waves flux for biogeochemistery |
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| 194 | IF( ltrcdm2dc ) CALL blk_bio_meanqsr |
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| 195 | |
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[3294] | 196 | #if defined key_cice |
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| 197 | IF( MOD( kt - 1, nn_fsbc ) == 0 ) THEN |
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| 198 | qlw_ice(:,:,1) = sf(jp_qlw)%fnow(:,:,1) |
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| 199 | qsr_ice(:,:,1) = sf(jp_qsr)%fnow(:,:,1) |
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| 200 | tatm_ice(:,:) = sf(jp_tair)%fnow(:,:,1) |
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| 201 | qatm_ice(:,:) = sf(jp_humi)%fnow(:,:,1) |
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| 202 | tprecip(:,:) = sf(jp_prec)%fnow(:,:,1) * rn_pfac |
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| 203 | sprecip(:,:) = sf(jp_snow)%fnow(:,:,1) * rn_pfac |
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| 204 | wndi_ice(:,:) = sf(jp_wndi)%fnow(:,:,1) |
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| 205 | wndj_ice(:,:) = sf(jp_wndj)%fnow(:,:,1) |
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| 206 | ENDIF |
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| 207 | #endif |
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[2528] | 208 | ! |
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[888] | 209 | END SUBROUTINE sbc_blk_core |
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| 210 | |
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| 211 | |
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[3680] | 212 | SUBROUTINE blk_oce_core( kt, sf, pst, pu, pv ) |
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[888] | 213 | !!--------------------------------------------------------------------- |
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| 214 | !! *** ROUTINE blk_core *** |
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| 215 | !! |
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| 216 | !! ** Purpose : provide the momentum, heat and freshwater fluxes at |
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| 217 | !! the ocean surface at each time step |
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| 218 | !! |
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| 219 | !! ** Method : CORE bulk formulea for the ocean using atmospheric |
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| 220 | !! fields read in sbc_read |
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| 221 | !! |
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| 222 | !! ** Outputs : - utau : i-component of the stress at U-point (N/m2) |
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| 223 | !! - vtau : j-component of the stress at V-point (N/m2) |
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[1695] | 224 | !! - taum : Wind stress module at T-point (N/m2) |
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| 225 | !! - wndm : Wind speed module at T-point (m/s) |
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[888] | 226 | !! - qsr : Solar heat flux over the ocean (W/m2) |
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| 227 | !! - qns : Non Solar heat flux over the ocean (W/m2) |
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| 228 | !! - evap : Evaporation over the ocean (kg/m2/s) |
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[3625] | 229 | !! - emp : evaporation minus precipitation (kg/m2/s) |
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[1242] | 230 | !! |
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| 231 | !! ** Nota : sf has to be a dummy argument for AGRIF on NEC |
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[888] | 232 | !!--------------------------------------------------------------------- |
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[3680] | 233 | INTEGER , INTENT(in ) :: kt ! time step index |
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| 234 | TYPE(fld), INTENT(inout), DIMENSION(:) :: sf ! input data |
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| 235 | REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pst ! surface temperature [Celcius] |
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| 236 | REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pu ! surface current at U-point (i-component) [m/s] |
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| 237 | REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pv ! surface current at V-point (j-component) [m/s] |
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[2715] | 238 | ! |
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| 239 | INTEGER :: ji, jj ! dummy loop indices |
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| 240 | REAL(wp) :: zcoef_qsatw, zztmp ! local variable |
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[3294] | 241 | REAL(wp), DIMENSION(:,:), POINTER :: zwnd_i, zwnd_j ! wind speed components at T-point |
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| 242 | REAL(wp), DIMENSION(:,:), POINTER :: zqsatw ! specific humidity at pst |
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| 243 | REAL(wp), DIMENSION(:,:), POINTER :: zqlw, zqsb ! long wave and sensible heat fluxes |
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| 244 | REAL(wp), DIMENSION(:,:), POINTER :: zqla, zevap ! latent heat fluxes and evaporation |
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| 245 | REAL(wp), DIMENSION(:,:), POINTER :: Cd ! transfer coefficient for momentum (tau) |
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| 246 | REAL(wp), DIMENSION(:,:), POINTER :: Ch ! transfer coefficient for sensible heat (Q_sens) |
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| 247 | REAL(wp), DIMENSION(:,:), POINTER :: Ce ! tansfert coefficient for evaporation (Q_lat) |
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| 248 | REAL(wp), DIMENSION(:,:), POINTER :: zst ! surface temperature in Kelvin |
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| 249 | REAL(wp), DIMENSION(:,:), POINTER :: zt_zu ! air temperature at wind speed height |
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| 250 | REAL(wp), DIMENSION(:,:), POINTER :: zq_zu ! air spec. hum. at wind speed height |
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[888] | 251 | !!--------------------------------------------------------------------- |
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[2715] | 252 | ! |
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[3294] | 253 | IF( nn_timing == 1 ) CALL timing_start('blk_oce_core') |
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| 254 | ! |
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| 255 | CALL wrk_alloc( jpi,jpj, zwnd_i, zwnd_j, zqsatw, zqlw, zqsb, zqla, zevap ) |
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| 256 | CALL wrk_alloc( jpi,jpj, Cd, Ch, Ce, zst, zt_zu, zq_zu ) |
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| 257 | ! |
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[888] | 258 | ! local scalars ( place there for vector optimisation purposes) |
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| 259 | zcoef_qsatw = 0.98 * 640380. / rhoa |
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| 260 | |
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[3625] | 261 | zst(:,:) = pst(:,:) + rt0 ! convert SST from Celcius to Kelvin (and set minimum value far above 0 K) |
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[888] | 262 | |
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| 263 | ! ----------------------------------------------------------------------------- ! |
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| 264 | ! 0 Wind components and module at T-point relative to the moving ocean ! |
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| 265 | ! ----------------------------------------------------------------------------- ! |
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[1000] | 266 | |
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[888] | 267 | ! ... components ( U10m - U_oce ) at T-point (unmasked) |
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| 268 | zwnd_i(:,:) = 0.e0 |
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| 269 | zwnd_j(:,:) = 0.e0 |
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[3680] | 270 | #if defined key_cyclone |
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| 271 | # if defined key_vectopt_loop |
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| 272 | !CDIR COLLAPSE |
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| 273 | # endif |
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| 274 | CALL wnd_cyc( kt, zwnd_i, zwnd_j ) ! add Manu ! |
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| 275 | DO jj = 2, jpjm1 |
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| 276 | DO ji = fs_2, fs_jpim1 ! vect. opt. |
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| 277 | sf(jp_wndi)%fnow(ji,jj,1) = sf(jp_wndi)%fnow(ji,jj,1) + zwnd_i(ji,jj) |
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| 278 | sf(jp_wndj)%fnow(ji,jj,1) = sf(jp_wndj)%fnow(ji,jj,1) + zwnd_j(ji,jj) |
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| 279 | END DO |
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| 280 | END DO |
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| 281 | #endif |
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[888] | 282 | #if defined key_vectopt_loop |
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| 283 | !CDIR COLLAPSE |
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| 284 | #endif |
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| 285 | DO jj = 2, jpjm1 |
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| 286 | DO ji = fs_2, fs_jpim1 ! vect. opt. |
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[4161] | 287 | zwnd_i(ji,jj) = ( sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( pu(ji-1,jj ) + pu(ji,jj) ) ) |
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| 288 | zwnd_j(ji,jj) = ( sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( pv(ji ,jj-1) + pv(ji,jj) ) ) |
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[888] | 289 | END DO |
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| 290 | END DO |
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| 291 | CALL lbc_lnk( zwnd_i(:,:) , 'T', -1. ) |
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| 292 | CALL lbc_lnk( zwnd_j(:,:) , 'T', -1. ) |
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| 293 | ! ... scalar wind ( = | U10m - U_oce | ) at T-point (masked) |
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| 294 | !CDIR NOVERRCHK |
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| 295 | !CDIR COLLAPSE |
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[1025] | 296 | wndm(:,:) = SQRT( zwnd_i(:,:) * zwnd_i(:,:) & |
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| 297 | & + zwnd_j(:,:) * zwnd_j(:,:) ) * tmask(:,:,1) |
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[888] | 298 | |
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| 299 | ! ----------------------------------------------------------------------------- ! |
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| 300 | ! I Radiative FLUXES ! |
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| 301 | ! ----------------------------------------------------------------------------- ! |
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| 302 | |
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[2528] | 303 | ! ocean albedo assumed to be constant + modify now Qsr to include the diurnal cycle ! Short Wave |
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| 304 | zztmp = 1. - albo |
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[4708] | 305 | #if defined key_surge |
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| 306 | qsr(:,:)=0._wp |
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| 307 | zqlw(:,:) = 0._wp |
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| 308 | #else |
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[2528] | 309 | IF( ln_dm2dc ) THEN ; qsr(:,:) = zztmp * sbc_dcy( sf(jp_qsr)%fnow(:,:,1) ) * tmask(:,:,1) |
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| 310 | ELSE ; qsr(:,:) = zztmp * sf(jp_qsr)%fnow(:,:,1) * tmask(:,:,1) |
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| 311 | ENDIF |
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[888] | 312 | !CDIR COLLAPSE |
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[2528] | 313 | zqlw(:,:) = ( sf(jp_qlw)%fnow(:,:,1) - Stef * zst(:,:)*zst(:,:)*zst(:,:)*zst(:,:) ) * tmask(:,:,1) ! Long Wave |
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[4708] | 314 | #endif |
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[888] | 315 | ! ----------------------------------------------------------------------------- ! |
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| 316 | ! II Turbulent FLUXES ! |
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| 317 | ! ----------------------------------------------------------------------------- ! |
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| 318 | |
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| 319 | ! ... specific humidity at SST and IST |
---|
| 320 | !CDIR NOVERRCHK |
---|
| 321 | !CDIR COLLAPSE |
---|
| 322 | zqsatw(:,:) = zcoef_qsatw * EXP( -5107.4 / zst(:,:) ) |
---|
| 323 | |
---|
| 324 | ! ... NCAR Bulk formulae, computation of Cd, Ch, Ce at T-point : |
---|
| 325 | IF( ln_2m ) THEN |
---|
| 326 | !! If air temp. and spec. hum. are given at different height (2m) than wind (10m) : |
---|
[1025] | 327 | CALL TURB_CORE_2Z(2.,10., zst , sf(jp_tair)%fnow, & |
---|
| 328 | & zqsatw, sf(jp_humi)%fnow, wndm, & |
---|
| 329 | & Cd , Ch , Ce , & |
---|
| 330 | & zt_zu , zq_zu ) |
---|
[4245] | 331 | ELSE IF( ln_bulk2z ) THEN |
---|
| 332 | !! If the height of the air temp./spec. hum. and wind are to be specified by hand : |
---|
| 333 | IF( rn_zqt == rn_zu ) THEN |
---|
| 334 | !! If air temp. and spec. hum. are at the same height as wind : |
---|
| 335 | CALL TURB_CORE_1Z( rn_zu, zst , sf(jp_tair)%fnow(:,:,1), & |
---|
| 336 | & zqsatw, sf(jp_humi)%fnow(:,:,1), wndm, & |
---|
| 337 | & Cd , Ch , Ce ) |
---|
| 338 | ELSE |
---|
| 339 | !! If air temp. and spec. hum. are at a different height to wind : |
---|
| 340 | CALL TURB_CORE_2Z(rn_zqt, rn_zu , zst , sf(jp_tair)%fnow, & |
---|
| 341 | & zqsatw, sf(jp_humi)%fnow, wndm, & |
---|
| 342 | & Cd , Ch , Ce , & |
---|
| 343 | & zt_zu , zq_zu ) |
---|
| 344 | ENDIF |
---|
[888] | 345 | ELSE |
---|
| 346 | !! If air temp. and spec. hum. are given at same height than wind (10m) : |
---|
| 347 | !gm bug? at the compiling phase, add a copy in temporary arrays... ==> check perf |
---|
[1025] | 348 | ! CALL TURB_CORE_1Z( 10., zst (:,:), sf(jp_tair)%fnow(:,:), & |
---|
| 349 | ! & zqsatw(:,:), sf(jp_humi)%fnow(:,:), wndm(:,:), & |
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| 350 | ! & Cd (:,:), Ch (:,:), Ce (:,:) ) |
---|
[888] | 351 | !gm bug |
---|
[2715] | 352 | ! ARPDBG - this won't compile with gfortran. Fix but check performance |
---|
| 353 | ! as per comment above. |
---|
| 354 | CALL TURB_CORE_1Z( 10., zst , sf(jp_tair)%fnow(:,:,1), & |
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| 355 | & zqsatw, sf(jp_humi)%fnow(:,:,1), wndm, & |
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[1025] | 356 | & Cd , Ch , Ce ) |
---|
[888] | 357 | ENDIF |
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| 358 | |
---|
[1695] | 359 | ! ... tau module, i and j component |
---|
| 360 | DO jj = 1, jpj |
---|
| 361 | DO ji = 1, jpi |
---|
| 362 | zztmp = rhoa * wndm(ji,jj) * Cd(ji,jj) |
---|
| 363 | taum (ji,jj) = zztmp * wndm (ji,jj) |
---|
| 364 | zwnd_i(ji,jj) = zztmp * zwnd_i(ji,jj) |
---|
| 365 | zwnd_j(ji,jj) = zztmp * zwnd_j(ji,jj) |
---|
| 366 | END DO |
---|
| 367 | END DO |
---|
[1705] | 368 | |
---|
| 369 | ! ... add the HF tau contribution to the wind stress module? |
---|
| 370 | IF( lhftau ) THEN |
---|
| 371 | !CDIR COLLAPSE |
---|
[2528] | 372 | taum(:,:) = taum(:,:) + sf(jp_tdif)%fnow(:,:,1) |
---|
[1705] | 373 | ENDIF |
---|
| 374 | CALL iom_put( "taum_oce", taum ) ! output wind stress module |
---|
| 375 | |
---|
[888] | 376 | ! ... utau, vtau at U- and V_points, resp. |
---|
| 377 | ! Note the use of 0.5*(2-umask) in order to unmask the stress along coastlines |
---|
| 378 | DO jj = 1, jpjm1 |
---|
| 379 | DO ji = 1, fs_jpim1 |
---|
| 380 | utau(ji,jj) = 0.5 * ( 2. - umask(ji,jj,1) ) * ( zwnd_i(ji,jj) + zwnd_i(ji+1,jj ) ) |
---|
| 381 | vtau(ji,jj) = 0.5 * ( 2. - vmask(ji,jj,1) ) * ( zwnd_j(ji,jj) + zwnd_j(ji ,jj+1) ) |
---|
| 382 | END DO |
---|
| 383 | END DO |
---|
| 384 | CALL lbc_lnk( utau(:,:), 'U', -1. ) |
---|
| 385 | CALL lbc_lnk( vtau(:,:), 'V', -1. ) |
---|
| 386 | |
---|
| 387 | ! Turbulent fluxes over ocean |
---|
| 388 | ! ----------------------------- |
---|
[4708] | 389 | #if ! defined key_surge |
---|
[4245] | 390 | IF( ln_2m .OR. ( ln_bulk2z .AND. rn_zqt /= rn_zu ) ) THEN |
---|
| 391 | ! Values of temp. and hum. adjusted to height of wind must be used |
---|
[4161] | 392 | zevap(:,:) = rn_efac * MAX( 0.e0, rhoa *Ce(:,:)*( zqsatw(:,:) - zq_zu(:,:) ) * wndm(:,:) ) ! Evaporation |
---|
| 393 | zqsb (:,:) = rhoa*cpa*Ch(:,:)*( zst (:,:) - zt_zu(:,:) ) * wndm(:,:) ! Sensible Heat |
---|
[888] | 394 | ELSE |
---|
| 395 | !CDIR COLLAPSE |
---|
[4161] | 396 | zevap(:,:) = rn_efac * MAX( 0.e0, rhoa *Ce(:,:)*( zqsatw(:,:) - sf(jp_humi)%fnow(:,:,1) ) * wndm(:,:) ) ! Evaporation |
---|
[888] | 397 | !CDIR COLLAPSE |
---|
[2528] | 398 | zqsb (:,:) = rhoa*cpa*Ch(:,:)*( zst (:,:) - sf(jp_tair)%fnow(:,:,1) ) * wndm(:,:) ! Sensible Heat |
---|
[888] | 399 | ENDIF |
---|
| 400 | !CDIR COLLAPSE |
---|
| 401 | zqla (:,:) = Lv * zevap(:,:) ! Latent Heat |
---|
[4708] | 402 | #endif |
---|
[888] | 403 | |
---|
| 404 | IF(ln_ctl) THEN |
---|
[1025] | 405 | CALL prt_ctl( tab2d_1=zqla , clinfo1=' blk_oce_core: zqla : ', tab2d_2=Ce , clinfo2=' Ce : ' ) |
---|
| 406 | CALL prt_ctl( tab2d_1=zqsb , clinfo1=' blk_oce_core: zqsb : ', tab2d_2=Ch , clinfo2=' Ch : ' ) |
---|
| 407 | CALL prt_ctl( tab2d_1=zqlw , clinfo1=' blk_oce_core: zqlw : ', tab2d_2=qsr, clinfo2=' qsr : ' ) |
---|
| 408 | CALL prt_ctl( tab2d_1=zqsatw, clinfo1=' blk_oce_core: zqsatw : ', tab2d_2=zst, clinfo2=' zst : ' ) |
---|
| 409 | CALL prt_ctl( tab2d_1=utau , clinfo1=' blk_oce_core: utau : ', mask1=umask, & |
---|
| 410 | & tab2d_2=vtau , clinfo2= ' vtau : ' , mask2=vmask ) |
---|
| 411 | CALL prt_ctl( tab2d_1=wndm , clinfo1=' blk_oce_core: wndm : ') |
---|
| 412 | CALL prt_ctl( tab2d_1=zst , clinfo1=' blk_oce_core: zst : ') |
---|
[888] | 413 | ENDIF |
---|
| 414 | |
---|
| 415 | ! ----------------------------------------------------------------------------- ! |
---|
| 416 | ! III Total FLUXES ! |
---|
| 417 | ! ----------------------------------------------------------------------------- ! |
---|
| 418 | |
---|
[4708] | 419 | #if defined key_surge |
---|
| 420 | emp (:,:) = 0._wp |
---|
| 421 | qns(:,:) = 0._wp |
---|
| 422 | #else |
---|
[888] | 423 | !CDIR COLLAPSE |
---|
[3625] | 424 | emp (:,:) = ( zevap(:,:) & ! mass flux (evap. - precip.) |
---|
| 425 | & - sf(jp_prec)%fnow(:,:,1) * rn_pfac ) * tmask(:,:,1) |
---|
[888] | 426 | !CDIR COLLAPSE |
---|
[3772] | 427 | qns(:,:) = zqlw(:,:) - zqsb(:,:) - zqla(:,:) & ! Downward Non Solar flux |
---|
| 428 | & - sf(jp_snow)%fnow(:,:,1) * rn_pfac * lfus & ! remove latent melting heat for solid precip |
---|
| 429 | & - zevap(:,:) * pst(:,:) * rcp & ! remove evap heat content at SST |
---|
| 430 | & + ( sf(jp_prec)%fnow(:,:,1) - sf(jp_snow)%fnow(:,:,1) ) * rn_pfac & ! add liquid precip heat content at Tair |
---|
| 431 | & * ( sf(jp_tair)%fnow(:,:,1) - rt0 ) * rcp & |
---|
| 432 | & + sf(jp_snow)%fnow(:,:,1) * rn_pfac & ! add solid precip heat content at min(Tair,Tsnow) |
---|
[3625] | 433 | & * ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic |
---|
[4708] | 434 | #endif |
---|
[888] | 435 | ! |
---|
[1482] | 436 | CALL iom_put( "qlw_oce", zqlw ) ! output downward longwave heat over the ocean |
---|
| 437 | CALL iom_put( "qsb_oce", - zqsb ) ! output downward sensible heat over the ocean |
---|
| 438 | CALL iom_put( "qla_oce", - zqla ) ! output downward latent heat over the ocean |
---|
[3625] | 439 | CALL iom_put( "qhc_oce", qns-zqlw+zqsb+zqla ) ! output downward heat content of E-P over the ocean |
---|
[1482] | 440 | CALL iom_put( "qns_oce", qns ) ! output downward non solar heat over the ocean |
---|
| 441 | ! |
---|
| 442 | IF(ln_ctl) THEN |
---|
| 443 | CALL prt_ctl(tab2d_1=zqsb , clinfo1=' blk_oce_core: zqsb : ', tab2d_2=zqlw , clinfo2=' zqlw : ') |
---|
| 444 | CALL prt_ctl(tab2d_1=zqla , clinfo1=' blk_oce_core: zqla : ', tab2d_2=qsr , clinfo2=' qsr : ') |
---|
| 445 | CALL prt_ctl(tab2d_1=pst , clinfo1=' blk_oce_core: pst : ', tab2d_2=emp , clinfo2=' emp : ') |
---|
| 446 | CALL prt_ctl(tab2d_1=utau , clinfo1=' blk_oce_core: utau : ', mask1=umask, & |
---|
| 447 | & tab2d_2=vtau , clinfo2= ' vtau : ' , mask2=vmask ) |
---|
| 448 | ENDIF |
---|
| 449 | ! |
---|
[3294] | 450 | CALL wrk_dealloc( jpi,jpj, zwnd_i, zwnd_j, zqsatw, zqlw, zqsb, zqla, zevap ) |
---|
| 451 | CALL wrk_dealloc( jpi,jpj, Cd, Ch, Ce, zst, zt_zu, zq_zu ) |
---|
[2715] | 452 | ! |
---|
[3294] | 453 | IF( nn_timing == 1 ) CALL timing_stop('blk_oce_core') |
---|
| 454 | ! |
---|
[888] | 455 | END SUBROUTINE blk_oce_core |
---|
[4306] | 456 | |
---|
| 457 | SUBROUTINE blk_bio_meanqsr |
---|
| 458 | !!--------------------------------------------------------------------- |
---|
| 459 | !! *** ROUTINE blk_bio_meanqsr |
---|
| 460 | !! |
---|
| 461 | !! ** Purpose : provide daily qsr_mean for PISCES when |
---|
| 462 | !! analytic diurnal cycle is applied in physic |
---|
| 463 | !! |
---|
| 464 | !! ** Method : add part where there is no ice |
---|
| 465 | !! |
---|
| 466 | !!--------------------------------------------------------------------- |
---|
| 467 | IF( nn_timing == 1 ) CALL timing_start('blk_bio_meanqsr') |
---|
| 468 | |
---|
| 469 | qsr_mean(:,:) = (1. - albo ) * sf(jp_qsr)%fnow(:,:,1) |
---|
| 470 | |
---|
| 471 | IF( nn_timing == 1 ) CALL timing_stop('blk_bio_meanqsr') |
---|
| 472 | |
---|
| 473 | END SUBROUTINE blk_bio_meanqsr |
---|
| 474 | |
---|
| 475 | |
---|
| 476 | SUBROUTINE blk_ice_meanqsr(palb,p_qsr_mean,pdim) |
---|
| 477 | !!--------------------------------------------------------------------- |
---|
| 478 | !! |
---|
| 479 | !! ** Purpose : provide the daily qsr_mean over sea_ice for PISCES when |
---|
| 480 | !! analytic diurnal cycle is applied in physic |
---|
| 481 | !! |
---|
| 482 | !! ** Method : compute qsr |
---|
| 483 | !! |
---|
| 484 | !!--------------------------------------------------------------------- |
---|
| 485 | REAL(wp), DIMENSION(:,:,:), INTENT(in ) :: palb ! ice albedo (clear sky) (alb_ice_cs) [%] |
---|
| 486 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qsr_mean ! solar heat flux over ice (T-point) [W/m2] |
---|
| 487 | INTEGER , INTENT(in ) :: pdim ! number of ice categories |
---|
| 488 | !! |
---|
| 489 | INTEGER :: ijpl ! number of ice categories (size of 3rd dim of input arrays) |
---|
| 490 | INTEGER :: ji, jj, jl ! dummy loop indices |
---|
| 491 | REAL(wp) :: zztmp ! temporary variable |
---|
| 492 | !!--------------------------------------------------------------------- |
---|
| 493 | IF( nn_timing == 1 ) CALL timing_start('blk_ice_meanqsr') |
---|
| 494 | ! |
---|
| 495 | ijpl = pdim ! number of ice categories |
---|
| 496 | zztmp = 1. / ( 1. - albo ) |
---|
| 497 | ! ! ========================== ! |
---|
| 498 | DO jl = 1, ijpl ! Loop over ice categories ! |
---|
| 499 | ! ! ========================== ! |
---|
| 500 | DO jj = 1 , jpj |
---|
| 501 | DO ji = 1, jpi |
---|
| 502 | p_qsr_mean(ji,jj,jl) = zztmp * ( 1. - palb(ji,jj,jl) ) * qsr_mean(ji,jj) |
---|
| 503 | END DO |
---|
| 504 | END DO |
---|
| 505 | END DO |
---|
| 506 | ! |
---|
| 507 | IF( nn_timing == 1 ) CALL timing_stop('blk_ice_meanqsr') |
---|
| 508 | ! |
---|
| 509 | END SUBROUTINE blk_ice_meanqsr |
---|
| 510 | |
---|
[888] | 511 | |
---|
| 512 | SUBROUTINE blk_ice_core( pst , pui , pvi , palb , & |
---|
| 513 | & p_taui, p_tauj, p_qns , p_qsr, & |
---|
| 514 | & p_qla , p_dqns, p_dqla, & |
---|
| 515 | & p_tpr , p_spr , & |
---|
[1270] | 516 | & p_fr1 , p_fr2 , cd_grid, pdim ) |
---|
[888] | 517 | !!--------------------------------------------------------------------- |
---|
| 518 | !! *** ROUTINE blk_ice_core *** |
---|
| 519 | !! |
---|
| 520 | !! ** Purpose : provide the surface boundary condition over sea-ice |
---|
| 521 | !! |
---|
| 522 | !! ** Method : compute momentum, heat and freshwater exchanged |
---|
| 523 | !! between atmosphere and sea-ice using CORE bulk |
---|
| 524 | !! formulea, ice variables and read atmmospheric fields. |
---|
| 525 | !! NB: ice drag coefficient is assumed to be a constant |
---|
| 526 | !! |
---|
| 527 | !! caution : the net upward water flux has with mm/day unit |
---|
| 528 | !!--------------------------------------------------------------------- |
---|
[2715] | 529 | REAL(wp), DIMENSION(:,:,:), INTENT(in ) :: pst ! ice surface temperature (>0, =rt0 over land) [Kelvin] |
---|
| 530 | REAL(wp), DIMENSION(:,:) , INTENT(in ) :: pui ! ice surface velocity (i- and i- components [m/s] |
---|
| 531 | REAL(wp), DIMENSION(:,:) , INTENT(in ) :: pvi ! at I-point (B-grid) or U & V-point (C-grid) |
---|
| 532 | REAL(wp), DIMENSION(:,:,:), INTENT(in ) :: palb ! ice albedo (clear sky) (alb_ice_cs) [%] |
---|
| 533 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_taui ! i- & j-components of surface ice stress [N/m2] |
---|
| 534 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_tauj ! at I-point (B-grid) or U & V-point (C-grid) |
---|
| 535 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qns ! non solar heat flux over ice (T-point) [W/m2] |
---|
| 536 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qsr ! solar heat flux over ice (T-point) [W/m2] |
---|
| 537 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qla ! latent heat flux over ice (T-point) [W/m2] |
---|
| 538 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_dqns ! non solar heat sensistivity (T-point) [W/m2] |
---|
| 539 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_dqla ! latent heat sensistivity (T-point) [W/m2] |
---|
| 540 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_tpr ! total precipitation (T-point) [Kg/m2/s] |
---|
| 541 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_spr ! solid precipitation (T-point) [Kg/m2/s] |
---|
| 542 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_fr1 ! 1sr fraction of qsr penetration in ice (T-point) [%] |
---|
| 543 | REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_fr2 ! 2nd fraction of qsr penetration in ice (T-point) [%] |
---|
| 544 | CHARACTER(len=1) , INTENT(in ) :: cd_grid ! ice grid ( C or B-grid) |
---|
| 545 | INTEGER , INTENT(in ) :: pdim ! number of ice categories |
---|
| 546 | !! |
---|
[888] | 547 | INTEGER :: ji, jj, jl ! dummy loop indices |
---|
| 548 | INTEGER :: ijpl ! number of ice categories (size of 3rd dim of input arrays) |
---|
| 549 | REAL(wp) :: zst2, zst3 |
---|
| 550 | REAL(wp) :: zcoef_wnorm, zcoef_wnorm2, zcoef_dqlw, zcoef_dqla, zcoef_dqsb |
---|
[2528] | 551 | REAL(wp) :: zztmp ! temporary variable |
---|
[888] | 552 | REAL(wp) :: zcoef_frca ! fractional cloud amount |
---|
| 553 | REAL(wp) :: zwnorm_f, zwndi_f , zwndj_f ! relative wind module and components at F-point |
---|
| 554 | REAL(wp) :: zwndi_t , zwndj_t ! relative wind components at T-point |
---|
[2715] | 555 | !! |
---|
[3294] | 556 | REAL(wp), DIMENSION(:,:) , POINTER :: z_wnds_t ! wind speed ( = | U10m - U_ice | ) at T-point |
---|
[2715] | 557 | REAL(wp), DIMENSION(:,:,:), POINTER :: z_qlw ! long wave heat flux over ice |
---|
| 558 | REAL(wp), DIMENSION(:,:,:), POINTER :: z_qsb ! sensible heat flux over ice |
---|
| 559 | REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqlw ! long wave heat sensitivity over ice |
---|
| 560 | REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqsb ! sensible heat sensitivity over ice |
---|
[888] | 561 | !!--------------------------------------------------------------------- |
---|
[3294] | 562 | ! |
---|
| 563 | IF( nn_timing == 1 ) CALL timing_start('blk_ice_core') |
---|
| 564 | ! |
---|
| 565 | CALL wrk_alloc( jpi,jpj, z_wnds_t ) |
---|
| 566 | CALL wrk_alloc( jpi,jpj,pdim, z_qlw, z_qsb, z_dqlw, z_dqsb ) |
---|
[888] | 567 | |
---|
[1270] | 568 | ijpl = pdim ! number of ice categories |
---|
[888] | 569 | |
---|
| 570 | ! local scalars ( place there for vector optimisation purposes) |
---|
[2528] | 571 | zcoef_wnorm = rhoa * Cice |
---|
[888] | 572 | zcoef_wnorm2 = rhoa * Cice * 0.5 |
---|
[2528] | 573 | zcoef_dqlw = 4.0 * 0.95 * Stef |
---|
| 574 | zcoef_dqla = -Ls * Cice * 11637800. * (-5897.8) |
---|
| 575 | zcoef_dqsb = rhoa * cpa * Cice |
---|
| 576 | zcoef_frca = 1.0 - 0.3 |
---|
[888] | 577 | |
---|
| 578 | !!gm brutal.... |
---|
| 579 | z_wnds_t(:,:) = 0.e0 |
---|
| 580 | p_taui (:,:) = 0.e0 |
---|
| 581 | p_tauj (:,:) = 0.e0 |
---|
| 582 | !!gm end |
---|
| 583 | |
---|
[2777] | 584 | #if defined key_lim3 |
---|
| 585 | tatm_ice(:,:) = sf(jp_tair)%fnow(:,:,1) ! LIM3: make Tair available in sea-ice. WARNING allocated after call to ice_init |
---|
| 586 | #endif |
---|
[888] | 587 | ! ----------------------------------------------------------------------------- ! |
---|
| 588 | ! Wind components and module relative to the moving ocean ( U10m - U_ice ) ! |
---|
| 589 | ! ----------------------------------------------------------------------------- ! |
---|
| 590 | SELECT CASE( cd_grid ) |
---|
[2528] | 591 | CASE( 'I' ) ! B-grid ice dynamics : I-point (i.e. F-point with sea-ice indexation) |
---|
[888] | 592 | ! and scalar wind at T-point ( = | U10m - U_ice | ) (masked) |
---|
| 593 | !CDIR NOVERRCHK |
---|
| 594 | DO jj = 2, jpjm1 |
---|
[2528] | 595 | DO ji = 2, jpim1 ! B grid : NO vector opt |
---|
[888] | 596 | ! ... scalar wind at I-point (fld being at T-point) |
---|
[2528] | 597 | zwndi_f = 0.25 * ( sf(jp_wndi)%fnow(ji-1,jj ,1) + sf(jp_wndi)%fnow(ji ,jj ,1) & |
---|
[4161] | 598 | & + sf(jp_wndi)%fnow(ji-1,jj-1,1) + sf(jp_wndi)%fnow(ji ,jj-1,1) ) - rn_vfac * pui(ji,jj) |
---|
[2528] | 599 | zwndj_f = 0.25 * ( sf(jp_wndj)%fnow(ji-1,jj ,1) + sf(jp_wndj)%fnow(ji ,jj ,1) & |
---|
[4161] | 600 | & + sf(jp_wndj)%fnow(ji-1,jj-1,1) + sf(jp_wndj)%fnow(ji ,jj-1,1) ) - rn_vfac * pvi(ji,jj) |
---|
[888] | 601 | zwnorm_f = zcoef_wnorm * SQRT( zwndi_f * zwndi_f + zwndj_f * zwndj_f ) |
---|
| 602 | ! ... ice stress at I-point |
---|
| 603 | p_taui(ji,jj) = zwnorm_f * zwndi_f |
---|
| 604 | p_tauj(ji,jj) = zwnorm_f * zwndj_f |
---|
| 605 | ! ... scalar wind at T-point (fld being at T-point) |
---|
[4161] | 606 | zwndi_t = sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.25 * ( pui(ji,jj+1) + pui(ji+1,jj+1) & |
---|
| 607 | & + pui(ji,jj ) + pui(ji+1,jj ) ) |
---|
| 608 | zwndj_t = sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.25 * ( pvi(ji,jj+1) + pvi(ji+1,jj+1) & |
---|
| 609 | & + pvi(ji,jj ) + pvi(ji+1,jj ) ) |
---|
[888] | 610 | z_wnds_t(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1) |
---|
| 611 | END DO |
---|
| 612 | END DO |
---|
| 613 | CALL lbc_lnk( p_taui , 'I', -1. ) |
---|
| 614 | CALL lbc_lnk( p_tauj , 'I', -1. ) |
---|
| 615 | CALL lbc_lnk( z_wnds_t, 'T', 1. ) |
---|
| 616 | ! |
---|
| 617 | CASE( 'C' ) ! C-grid ice dynamics : U & V-points (same as ocean) |
---|
| 618 | #if defined key_vectopt_loop |
---|
| 619 | !CDIR COLLAPSE |
---|
| 620 | #endif |
---|
| 621 | DO jj = 2, jpj |
---|
| 622 | DO ji = fs_2, jpi ! vect. opt. |
---|
[4161] | 623 | zwndi_t = ( sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( pui(ji-1,jj ) + pui(ji,jj) ) ) |
---|
| 624 | zwndj_t = ( sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( pvi(ji ,jj-1) + pvi(ji,jj) ) ) |
---|
[888] | 625 | z_wnds_t(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1) |
---|
| 626 | END DO |
---|
| 627 | END DO |
---|
| 628 | #if defined key_vectopt_loop |
---|
| 629 | !CDIR COLLAPSE |
---|
| 630 | #endif |
---|
| 631 | DO jj = 2, jpjm1 |
---|
| 632 | DO ji = fs_2, fs_jpim1 ! vect. opt. |
---|
[2528] | 633 | p_taui(ji,jj) = zcoef_wnorm2 * ( z_wnds_t(ji+1,jj ) + z_wnds_t(ji,jj) ) & |
---|
[4161] | 634 | & * ( 0.5 * (sf(jp_wndi)%fnow(ji+1,jj,1) + sf(jp_wndi)%fnow(ji,jj,1) ) - rn_vfac * pui(ji,jj) ) |
---|
[2528] | 635 | p_tauj(ji,jj) = zcoef_wnorm2 * ( z_wnds_t(ji,jj+1 ) + z_wnds_t(ji,jj) ) & |
---|
[4161] | 636 | & * ( 0.5 * (sf(jp_wndj)%fnow(ji,jj+1,1) + sf(jp_wndj)%fnow(ji,jj,1) ) - rn_vfac * pvi(ji,jj) ) |
---|
[888] | 637 | END DO |
---|
| 638 | END DO |
---|
| 639 | CALL lbc_lnk( p_taui , 'U', -1. ) |
---|
| 640 | CALL lbc_lnk( p_tauj , 'V', -1. ) |
---|
| 641 | CALL lbc_lnk( z_wnds_t, 'T', 1. ) |
---|
| 642 | ! |
---|
| 643 | END SELECT |
---|
| 644 | |
---|
[2528] | 645 | zztmp = 1. / ( 1. - albo ) |
---|
[888] | 646 | ! ! ========================== ! |
---|
| 647 | DO jl = 1, ijpl ! Loop over ice categories ! |
---|
| 648 | ! ! ========================== ! |
---|
| 649 | !CDIR NOVERRCHK |
---|
| 650 | !CDIR COLLAPSE |
---|
| 651 | DO jj = 1 , jpj |
---|
| 652 | !CDIR NOVERRCHK |
---|
| 653 | DO ji = 1, jpi |
---|
| 654 | ! ----------------------------! |
---|
| 655 | ! I Radiative FLUXES ! |
---|
| 656 | ! ----------------------------! |
---|
| 657 | zst2 = pst(ji,jj,jl) * pst(ji,jj,jl) |
---|
| 658 | zst3 = pst(ji,jj,jl) * zst2 |
---|
| 659 | ! Short Wave (sw) |
---|
[2528] | 660 | p_qsr(ji,jj,jl) = zztmp * ( 1. - palb(ji,jj,jl) ) * qsr(ji,jj) |
---|
[888] | 661 | ! Long Wave (lw) |
---|
[4161] | 662 | ! iovino |
---|
| 663 | IF( ff(ji,jj) .GT. 0._wp ) THEN |
---|
| 664 | z_qlw(ji,jj,jl) = ( 0.95 * sf(jp_qlw)%fnow(ji,jj,1) - Stef * pst(ji,jj,jl) * zst3 ) * tmask(ji,jj,1) |
---|
| 665 | ELSE |
---|
| 666 | z_qlw(ji,jj,jl) = 0.95 * ( sf(jp_qlw)%fnow(ji,jj,1) - Stef * pst(ji,jj,jl) * zst3 ) * tmask(ji,jj,1) |
---|
| 667 | ENDIF |
---|
[888] | 668 | ! lw sensitivity |
---|
| 669 | z_dqlw(ji,jj,jl) = zcoef_dqlw * zst3 |
---|
| 670 | |
---|
| 671 | ! ----------------------------! |
---|
| 672 | ! II Turbulent FLUXES ! |
---|
| 673 | ! ----------------------------! |
---|
| 674 | |
---|
| 675 | ! ... turbulent heat fluxes |
---|
| 676 | ! Sensible Heat |
---|
[2528] | 677 | 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] | 678 | ! Latent Heat |
---|
[4161] | 679 | p_qla(ji,jj,jl) = rn_efac * MAX( 0.e0, rhoa * Ls * Cice * z_wnds_t(ji,jj) & |
---|
| 680 | & * ( 11637800. * EXP( -5897.8 / pst(ji,jj,jl) ) / rhoa - sf(jp_humi)%fnow(ji,jj,1) ) ) |
---|
[888] | 681 | ! Latent heat sensitivity for ice (Dqla/Dt) |
---|
[4161] | 682 | p_dqla(ji,jj,jl) = rn_efac * zcoef_dqla * z_wnds_t(ji,jj) / ( zst2 ) * EXP( -5897.8 / pst(ji,jj,jl) ) |
---|
[888] | 683 | ! Sensible heat sensitivity (Dqsb_ice/Dtn_ice) |
---|
| 684 | z_dqsb(ji,jj,jl) = zcoef_dqsb * z_wnds_t(ji,jj) |
---|
| 685 | |
---|
| 686 | ! ----------------------------! |
---|
| 687 | ! III Total FLUXES ! |
---|
| 688 | ! ----------------------------! |
---|
| 689 | ! Downward Non Solar flux |
---|
| 690 | p_qns (ji,jj,jl) = z_qlw (ji,jj,jl) - z_qsb (ji,jj,jl) - p_qla (ji,jj,jl) |
---|
| 691 | ! Total non solar heat flux sensitivity for ice |
---|
| 692 | p_dqns(ji,jj,jl) = - ( z_dqlw(ji,jj,jl) + z_dqsb(ji,jj,jl) + p_dqla(ji,jj,jl) ) |
---|
| 693 | END DO |
---|
| 694 | ! |
---|
| 695 | END DO |
---|
| 696 | ! |
---|
| 697 | END DO |
---|
| 698 | ! |
---|
| 699 | !-------------------------------------------------------------------- |
---|
| 700 | ! FRACTIONs of net shortwave radiation which is not absorbed in the |
---|
| 701 | ! thin surface layer and penetrates inside the ice cover |
---|
| 702 | ! ( Maykut and Untersteiner, 1971 ; Ebert and Curry, 1993 ) |
---|
| 703 | |
---|
| 704 | !CDIR COLLAPSE |
---|
| 705 | p_fr1(:,:) = ( 0.18 * ( 1.0 - zcoef_frca ) + 0.35 * zcoef_frca ) |
---|
| 706 | !CDIR COLLAPSE |
---|
| 707 | p_fr2(:,:) = ( 0.82 * ( 1.0 - zcoef_frca ) + 0.65 * zcoef_frca ) |
---|
| 708 | |
---|
| 709 | !CDIR COLLAPSE |
---|
[2528] | 710 | p_tpr(:,:) = sf(jp_prec)%fnow(:,:,1) * rn_pfac ! total precipitation [kg/m2/s] |
---|
[888] | 711 | !CDIR COLLAPSE |
---|
[2528] | 712 | p_spr(:,:) = sf(jp_snow)%fnow(:,:,1) * rn_pfac ! solid precipitation [kg/m2/s] |
---|
[4161] | 713 | CALL iom_put( 'snowpre', p_spr * 86400. ) ! Snow precipitation |
---|
| 714 | CALL iom_put( 'precip', p_tpr * 86400. ) ! Total precipitation |
---|
[888] | 715 | ! |
---|
| 716 | IF(ln_ctl) THEN |
---|
| 717 | CALL prt_ctl(tab3d_1=p_qla , clinfo1=' blk_ice_core: p_qla : ', tab3d_2=z_qsb , clinfo2=' z_qsb : ', kdim=ijpl) |
---|
| 718 | CALL prt_ctl(tab3d_1=z_qlw , clinfo1=' blk_ice_core: z_qlw : ', tab3d_2=p_dqla , clinfo2=' p_dqla : ', kdim=ijpl) |
---|
| 719 | CALL prt_ctl(tab3d_1=z_dqsb , clinfo1=' blk_ice_core: z_dqsb : ', tab3d_2=z_dqlw , clinfo2=' z_dqlw : ', kdim=ijpl) |
---|
| 720 | CALL prt_ctl(tab3d_1=p_dqns , clinfo1=' blk_ice_core: p_dqns : ', tab3d_2=p_qsr , clinfo2=' p_qsr : ', kdim=ijpl) |
---|
| 721 | CALL prt_ctl(tab3d_1=pst , clinfo1=' blk_ice_core: pst : ', tab3d_2=p_qns , clinfo2=' p_qns : ', kdim=ijpl) |
---|
| 722 | CALL prt_ctl(tab2d_1=p_tpr , clinfo1=' blk_ice_core: p_tpr : ', tab2d_2=p_spr , clinfo2=' p_spr : ') |
---|
| 723 | CALL prt_ctl(tab2d_1=p_taui , clinfo1=' blk_ice_core: p_taui : ', tab2d_2=p_tauj , clinfo2=' p_tauj : ') |
---|
| 724 | CALL prt_ctl(tab2d_1=z_wnds_t, clinfo1=' blk_ice_core: z_wnds_t : ') |
---|
| 725 | ENDIF |
---|
| 726 | |
---|
[3294] | 727 | CALL wrk_dealloc( jpi,jpj, z_wnds_t ) |
---|
| 728 | CALL wrk_dealloc( jpi,jpj,pdim, z_qlw, z_qsb, z_dqlw, z_dqsb ) |
---|
[2715] | 729 | ! |
---|
[3294] | 730 | IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core') |
---|
| 731 | ! |
---|
[888] | 732 | END SUBROUTINE blk_ice_core |
---|
| 733 | |
---|
| 734 | |
---|
| 735 | SUBROUTINE TURB_CORE_1Z(zu, sst, T_a, q_sat, q_a, & |
---|
[2715] | 736 | & dU , Cd , Ch , Ce ) |
---|
[888] | 737 | !!---------------------------------------------------------------------- |
---|
| 738 | !! *** ROUTINE turb_core *** |
---|
| 739 | !! |
---|
| 740 | !! ** Purpose : Computes turbulent transfert coefficients of surface |
---|
| 741 | !! fluxes according to Large & Yeager (2004) |
---|
| 742 | !! |
---|
| 743 | !! ** 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 |
---|
| 744 | !! Momentum, Latent and sensible heat exchange coefficients |
---|
| 745 | !! Caution: this procedure should only be used in cases when air |
---|
| 746 | !! temperature (T_air), air specific humidity (q_air) and wind (dU) |
---|
| 747 | !! are provided at the same height 'zzu'! |
---|
| 748 | !! |
---|
[2715] | 749 | !! References : Large & Yeager, 2004 : ??? |
---|
[888] | 750 | !!---------------------------------------------------------------------- |
---|
[2715] | 751 | REAL(wp) , INTENT(in ) :: zu ! altitude of wind measurement [m] |
---|
| 752 | REAL(wp), DIMENSION(:,:), INTENT(in ) :: sst ! sea surface temperature [Kelvin] |
---|
| 753 | REAL(wp), DIMENSION(:,:), INTENT(in ) :: T_a ! potential air temperature [Kelvin] |
---|
| 754 | REAL(wp), DIMENSION(:,:), INTENT(in ) :: q_sat ! sea surface specific humidity [kg/kg] |
---|
| 755 | REAL(wp), DIMENSION(:,:), INTENT(in ) :: q_a ! specific air humidity [kg/kg] |
---|
| 756 | REAL(wp), DIMENSION(:,:), INTENT(in ) :: dU ! wind module |U(zu)-U(0)| [m/s] |
---|
| 757 | REAL(wp), DIMENSION(:,:), INTENT( out) :: Cd ! transfert coefficient for momentum (tau) |
---|
| 758 | REAL(wp), DIMENSION(:,:), INTENT( out) :: Ch ! transfert coefficient for temperature (Q_sens) |
---|
| 759 | REAL(wp), DIMENSION(:,:), INTENT( out) :: Ce ! transfert coefficient for evaporation (Q_lat) |
---|
[888] | 760 | !! |
---|
| 761 | INTEGER :: j_itt |
---|
[2715] | 762 | INTEGER , PARAMETER :: nb_itt = 3 |
---|
| 763 | REAL(wp), PARAMETER :: grav = 9.8 ! gravity |
---|
| 764 | REAL(wp), PARAMETER :: kappa = 0.4 ! von Karman s constant |
---|
[3294] | 765 | |
---|
| 766 | REAL(wp), DIMENSION(:,:), POINTER :: dU10 ! dU [m/s] |
---|
| 767 | REAL(wp), DIMENSION(:,:), POINTER :: dT ! air/sea temperature differeence [K] |
---|
| 768 | REAL(wp), DIMENSION(:,:), POINTER :: dq ! air/sea humidity difference [K] |
---|
| 769 | REAL(wp), DIMENSION(:,:), POINTER :: Cd_n10 ! 10m neutral drag coefficient |
---|
| 770 | REAL(wp), DIMENSION(:,:), POINTER :: Ce_n10 ! 10m neutral latent coefficient |
---|
| 771 | REAL(wp), DIMENSION(:,:), POINTER :: Ch_n10 ! 10m neutral sensible coefficient |
---|
| 772 | REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd_n10 ! root square of Cd_n10 |
---|
| 773 | REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd ! root square of Cd |
---|
| 774 | REAL(wp), DIMENSION(:,:), POINTER :: T_vpot ! virtual potential temperature [K] |
---|
| 775 | REAL(wp), DIMENSION(:,:), POINTER :: T_star ! turbulent scale of tem. fluct. |
---|
| 776 | REAL(wp), DIMENSION(:,:), POINTER :: q_star ! turbulent humidity of temp. fluct. |
---|
| 777 | REAL(wp), DIMENSION(:,:), POINTER :: U_star ! turb. scale of velocity fluct. |
---|
| 778 | REAL(wp), DIMENSION(:,:), POINTER :: L ! Monin-Obukov length [m] |
---|
| 779 | REAL(wp), DIMENSION(:,:), POINTER :: zeta ! stability parameter at height zu |
---|
| 780 | REAL(wp), DIMENSION(:,:), POINTER :: U_n10 ! neutral wind velocity at 10m [m] |
---|
| 781 | REAL(wp), DIMENSION(:,:), POINTER :: xlogt, xct, zpsi_h, zpsi_m |
---|
| 782 | |
---|
| 783 | INTEGER , DIMENSION(:,:), POINTER :: stab ! 1st guess stability test integer |
---|
[2715] | 784 | !!---------------------------------------------------------------------- |
---|
[3294] | 785 | ! |
---|
| 786 | IF( nn_timing == 1 ) CALL timing_start('TURB_CORE_1Z') |
---|
| 787 | ! |
---|
| 788 | CALL wrk_alloc( jpi,jpj, stab ) ! integer |
---|
| 789 | CALL wrk_alloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) |
---|
| 790 | CALL wrk_alloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta, U_n10, xlogt, xct, zpsi_h, zpsi_m ) |
---|
[888] | 791 | |
---|
| 792 | !! * Start |
---|
| 793 | !! Air/sea differences |
---|
| 794 | dU10 = max(0.5, dU) ! we don't want to fall under 0.5 m/s |
---|
| 795 | dT = T_a - sst ! assuming that T_a is allready the potential temp. at zzu |
---|
| 796 | dq = q_a - q_sat |
---|
| 797 | !! |
---|
| 798 | !! Virtual potential temperature |
---|
| 799 | T_vpot = T_a*(1. + 0.608*q_a) |
---|
| 800 | !! |
---|
| 801 | !! Neutral Drag Coefficient |
---|
| 802 | stab = 0.5 + sign(0.5,dT) ! stable : stab = 1 ; unstable : stab = 0 |
---|
[3294] | 803 | IF ( ln_cdgw ) THEN |
---|
| 804 | cdn_wave = cdn_wave - rsmall*(tmask(:,:,1)-1) |
---|
| 805 | Cd_n10(:,:) = cdn_wave |
---|
| 806 | ELSE |
---|
[4333] | 807 | Cd_n10 = 1.e-3 * ( 2.7/dU10 + 0.142 + dU10/13.09 ) ! L & Y eq. (6a) |
---|
[3294] | 808 | ENDIF |
---|
[888] | 809 | sqrt_Cd_n10 = sqrt(Cd_n10) |
---|
[4333] | 810 | Ce_n10 = 1.e-3 * ( 34.6 * sqrt_Cd_n10 ) ! L & Y eq. (6b) |
---|
| 811 | Ch_n10 = 1.e-3*sqrt_Cd_n10*(18.*stab + 32.7*(1.-stab)) ! L & Y eq. (6c), (6d) |
---|
[888] | 812 | !! |
---|
| 813 | !! Initializing transfert coefficients with their first guess neutral equivalents : |
---|
| 814 | Cd = Cd_n10 ; Ce = Ce_n10 ; Ch = Ch_n10 ; sqrt_Cd = sqrt(Cd) |
---|
| 815 | |
---|
| 816 | !! * Now starting iteration loop |
---|
| 817 | DO j_itt=1, nb_itt |
---|
| 818 | !! Turbulent scales : |
---|
| 819 | U_star = sqrt_Cd*dU10 ! L & Y eq. (7a) |
---|
| 820 | T_star = Ch/sqrt_Cd*dT ! L & Y eq. (7b) |
---|
| 821 | q_star = Ce/sqrt_Cd*dq ! L & Y eq. (7c) |
---|
| 822 | |
---|
| 823 | !! Estimate the Monin-Obukov length : |
---|
| 824 | L = (U_star**2)/( kappa*grav*(T_star/T_vpot + q_star/(q_a + 1./0.608)) ) |
---|
| 825 | |
---|
| 826 | !! Stability parameters : |
---|
[2715] | 827 | zeta = zu/L ; zeta = sign( min(abs(zeta),10.0), zeta ) |
---|
| 828 | zpsi_h = psi_h(zeta) |
---|
| 829 | zpsi_m = psi_m(zeta) |
---|
[888] | 830 | |
---|
[3294] | 831 | IF ( ln_cdgw ) THEN |
---|
| 832 | sqrt_Cd=kappa/((kappa/sqrt_Cd_n10) - zpsi_m) ; Cd=sqrt_Cd*sqrt_Cd; |
---|
| 833 | ELSE |
---|
| 834 | !! Shifting the wind speed to 10m and neutral stability : |
---|
| 835 | U_n10 = dU10*1./(1. + sqrt_Cd_n10/kappa*(log(zu/10.) - zpsi_m)) ! L & Y eq. (9a) |
---|
[888] | 836 | |
---|
[3294] | 837 | !! Updating the neutral 10m transfer coefficients : |
---|
[4333] | 838 | Cd_n10 = 1.e-3 * (2.7/U_n10 + 0.142 + U_n10/13.09) ! L & Y eq. (6a) |
---|
[3294] | 839 | sqrt_Cd_n10 = sqrt(Cd_n10) |
---|
[4333] | 840 | Ce_n10 = 1.e-3 * (34.6 * sqrt_Cd_n10) ! L & Y eq. (6b) |
---|
[3294] | 841 | stab = 0.5 + sign(0.5,zeta) |
---|
[4333] | 842 | Ch_n10 = 1.e-3*sqrt_Cd_n10*(18.*stab + 32.7*(1.-stab)) ! L & Y eq. (6c), (6d) |
---|
[888] | 843 | |
---|
[3294] | 844 | !! Shifting the neutral 10m transfer coefficients to ( zu , zeta ) : |
---|
| 845 | !! |
---|
| 846 | xct = 1. + sqrt_Cd_n10/kappa*(log(zu/10) - zpsi_m) |
---|
| 847 | Cd = Cd_n10/(xct*xct) ; sqrt_Cd = sqrt(Cd) |
---|
| 848 | ENDIF |
---|
[888] | 849 | !! |
---|
| 850 | xlogt = log(zu/10.) - zpsi_h |
---|
| 851 | !! |
---|
| 852 | xct = 1. + Ch_n10*xlogt/kappa/sqrt_Cd_n10 |
---|
| 853 | Ch = Ch_n10*sqrt_Cd/sqrt_Cd_n10/xct |
---|
| 854 | !! |
---|
| 855 | xct = 1. + Ce_n10*xlogt/kappa/sqrt_Cd_n10 |
---|
| 856 | Ce = Ce_n10*sqrt_Cd/sqrt_Cd_n10/xct |
---|
| 857 | !! |
---|
| 858 | END DO |
---|
| 859 | !! |
---|
[3294] | 860 | CALL wrk_dealloc( jpi,jpj, stab ) ! integer |
---|
| 861 | CALL wrk_dealloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) |
---|
| 862 | CALL wrk_dealloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta, U_n10, xlogt, xct, zpsi_h, zpsi_m ) |
---|
[2715] | 863 | ! |
---|
[3294] | 864 | IF( nn_timing == 1 ) CALL timing_stop('TURB_CORE_1Z') |
---|
| 865 | ! |
---|
[888] | 866 | END SUBROUTINE TURB_CORE_1Z |
---|
| 867 | |
---|
| 868 | |
---|
| 869 | SUBROUTINE TURB_CORE_2Z(zt, zu, sst, T_zt, q_sat, q_zt, dU, Cd, Ch, Ce, T_zu, q_zu) |
---|
| 870 | !!---------------------------------------------------------------------- |
---|
| 871 | !! *** ROUTINE turb_core *** |
---|
| 872 | !! |
---|
| 873 | !! ** Purpose : Computes turbulent transfert coefficients of surface |
---|
| 874 | !! fluxes according to Large & Yeager (2004). |
---|
| 875 | !! |
---|
| 876 | !! ** 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 |
---|
| 877 | !! Momentum, Latent and sensible heat exchange coefficients |
---|
| 878 | !! Caution: this procedure should only be used in cases when air |
---|
[4245] | 879 | !! temperature (T_air) and air specific humidity (q_air) are at a |
---|
| 880 | !! different height to wind (dU). |
---|
[888] | 881 | !! |
---|
[2715] | 882 | !! References : Large & Yeager, 2004 : ??? |
---|
[888] | 883 | !!---------------------------------------------------------------------- |
---|
[3294] | 884 | REAL(wp), INTENT(in ) :: zt ! height for T_zt and q_zt [m] |
---|
| 885 | REAL(wp), INTENT(in ) :: zu ! height for dU [m] |
---|
| 886 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: sst ! sea surface temperature [Kelvin] |
---|
| 887 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: T_zt ! potential air temperature [Kelvin] |
---|
| 888 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_sat ! sea surface specific humidity [kg/kg] |
---|
| 889 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_zt ! specific air humidity [kg/kg] |
---|
| 890 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: dU ! relative wind module |U(zu)-U(0)| [m/s] |
---|
| 891 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Cd ! transfer coefficient for momentum (tau) |
---|
| 892 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ch ! transfer coefficient for sensible heat (Q_sens) |
---|
| 893 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ce ! transfert coefficient for evaporation (Q_lat) |
---|
| 894 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: T_zu ! air temp. shifted at zu [K] |
---|
| 895 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: q_zu ! spec. hum. shifted at zu [kg/kg] |
---|
[888] | 896 | |
---|
| 897 | INTEGER :: j_itt |
---|
[4245] | 898 | INTEGER , PARAMETER :: nb_itt = 5 ! number of itterations |
---|
[3294] | 899 | REAL(wp), PARAMETER :: grav = 9.8 ! gravity |
---|
| 900 | REAL(wp), PARAMETER :: kappa = 0.4 ! von Karman's constant |
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| 901 | |
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| 902 | REAL(wp), DIMENSION(:,:), POINTER :: dU10 ! dU [m/s] |
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| 903 | REAL(wp), DIMENSION(:,:), POINTER :: dT ! air/sea temperature differeence [K] |
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| 904 | REAL(wp), DIMENSION(:,:), POINTER :: dq ! air/sea humidity difference [K] |
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| 905 | REAL(wp), DIMENSION(:,:), POINTER :: Cd_n10 ! 10m neutral drag coefficient |
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| 906 | REAL(wp), DIMENSION(:,:), POINTER :: Ce_n10 ! 10m neutral latent coefficient |
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| 907 | REAL(wp), DIMENSION(:,:), POINTER :: Ch_n10 ! 10m neutral sensible coefficient |
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| 908 | REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd_n10 ! root square of Cd_n10 |
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| 909 | REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd ! root square of Cd |
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| 910 | REAL(wp), DIMENSION(:,:), POINTER :: T_vpot ! virtual potential temperature [K] |
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| 911 | REAL(wp), DIMENSION(:,:), POINTER :: T_star ! turbulent scale of tem. fluct. |
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| 912 | REAL(wp), DIMENSION(:,:), POINTER :: q_star ! turbulent humidity of temp. fluct. |
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| 913 | REAL(wp), DIMENSION(:,:), POINTER :: U_star ! turb. scale of velocity fluct. |
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| 914 | REAL(wp), DIMENSION(:,:), POINTER :: L ! Monin-Obukov length [m] |
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| 915 | REAL(wp), DIMENSION(:,:), POINTER :: zeta_u ! stability parameter at height zu |
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| 916 | REAL(wp), DIMENSION(:,:), POINTER :: zeta_t ! stability parameter at height zt |
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| 917 | REAL(wp), DIMENSION(:,:), POINTER :: U_n10 ! neutral wind velocity at 10m [m] |
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| 918 | REAL(wp), DIMENSION(:,:), POINTER :: xlogt, xct, zpsi_hu, zpsi_ht, zpsi_m |
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| 919 | |
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| 920 | INTEGER , DIMENSION(:,:), POINTER :: stab ! 1st stability test integer |
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[2528] | 921 | !!---------------------------------------------------------------------- |
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[3294] | 922 | ! |
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| 923 | IF( nn_timing == 1 ) CALL timing_start('TURB_CORE_2Z') |
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| 924 | ! |
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| 925 | CALL wrk_alloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) |
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| 926 | CALL wrk_alloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta_u, zeta_t, U_n10 ) |
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| 927 | CALL wrk_alloc( jpi,jpj, xlogt, xct, zpsi_hu, zpsi_ht, zpsi_m ) |
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| 928 | CALL wrk_alloc( jpi,jpj, stab ) ! interger |
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[888] | 929 | |
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| 930 | !! Initial air/sea differences |
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| 931 | dU10 = max(0.5, dU) ! we don't want to fall under 0.5 m/s |
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| 932 | dT = T_zt - sst |
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| 933 | dq = q_zt - q_sat |
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| 934 | |
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| 935 | !! Neutral Drag Coefficient : |
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| 936 | stab = 0.5 + sign(0.5,dT) ! stab = 1 if dT > 0 -> STABLE |
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[3294] | 937 | IF( ln_cdgw ) THEN |
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| 938 | cdn_wave = cdn_wave - rsmall*(tmask(:,:,1)-1) |
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| 939 | Cd_n10(:,:) = cdn_wave |
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| 940 | ELSE |
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[4333] | 941 | Cd_n10 = 1.e-3*( 2.7/dU10 + 0.142 + dU10/13.09 ) |
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[3294] | 942 | ENDIF |
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[888] | 943 | sqrt_Cd_n10 = sqrt(Cd_n10) |
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[4333] | 944 | Ce_n10 = 1.e-3*( 34.6 * sqrt_Cd_n10 ) |
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| 945 | Ch_n10 = 1.e-3*sqrt_Cd_n10*(18.*stab + 32.7*(1. - stab)) |
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[888] | 946 | |
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| 947 | !! Initializing transf. coeff. with their first guess neutral equivalents : |
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| 948 | Cd = Cd_n10 ; Ce = Ce_n10 ; Ch = Ch_n10 ; sqrt_Cd = sqrt(Cd) |
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| 949 | |
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| 950 | !! Initializing z_u values with z_t values : |
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| 951 | T_zu = T_zt ; q_zu = q_zt |
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| 952 | |
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| 953 | !! * Now starting iteration loop |
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| 954 | DO j_itt=1, nb_itt |
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| 955 | dT = T_zu - sst ; dq = q_zu - q_sat ! Updating air/sea differences |
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[2715] | 956 | T_vpot = T_zu*(1. + 0.608*q_zu) ! Updating virtual potential temperature at zu |
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[888] | 957 | U_star = sqrt_Cd*dU10 ! Updating turbulent scales : (L & Y eq. (7)) |
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| 958 | T_star = Ch/sqrt_Cd*dT ! |
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| 959 | q_star = Ce/sqrt_Cd*dq ! |
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| 960 | !! |
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| 961 | L = (U_star*U_star) & ! Estimate the Monin-Obukov length at height zu |
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[2715] | 962 | & / (kappa*grav/T_vpot*(T_star*(1.+0.608*q_zu) + 0.608*T_zu*q_star)) |
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[888] | 963 | !! Stability parameters : |
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| 964 | zeta_u = zu/L ; zeta_u = sign( min(abs(zeta_u),10.0), zeta_u ) |
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| 965 | zeta_t = zt/L ; zeta_t = sign( min(abs(zeta_t),10.0), zeta_t ) |
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| 966 | zpsi_hu = psi_h(zeta_u) |
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| 967 | zpsi_ht = psi_h(zeta_t) |
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| 968 | zpsi_m = psi_m(zeta_u) |
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| 969 | !! |
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| 970 | !! Shifting the wind speed to 10m and neutral stability : (L & Y eq.(9a)) |
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| 971 | ! U_n10 = dU10/(1. + sqrt_Cd_n10/kappa*(log(zu/10.) - psi_m(zeta_u))) |
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| 972 | U_n10 = dU10/(1. + sqrt_Cd_n10/kappa*(log(zu/10.) - zpsi_m)) |
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| 973 | !! |
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| 974 | !! Shifting temperature and humidity at zu : (L & Y eq. (9b-9c)) |
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| 975 | ! T_zu = T_zt - T_star/kappa*(log(zt/zu) + psi_h(zeta_u) - psi_h(zeta_t)) |
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| 976 | T_zu = T_zt - T_star/kappa*(log(zt/zu) + zpsi_hu - zpsi_ht) |
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| 977 | ! q_zu = q_zt - q_star/kappa*(log(zt/zu) + psi_h(zeta_u) - psi_h(zeta_t)) |
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| 978 | q_zu = q_zt - q_star/kappa*(log(zt/zu) + zpsi_hu - zpsi_ht) |
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| 979 | !! |
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| 980 | !! q_zu cannot have a negative value : forcing 0 |
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| 981 | stab = 0.5 + sign(0.5,q_zu) ; q_zu = stab*q_zu |
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| 982 | !! |
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[3294] | 983 | IF( ln_cdgw ) THEN |
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| 984 | sqrt_Cd=kappa/((kappa/sqrt_Cd_n10) - zpsi_m) ; Cd=sqrt_Cd*sqrt_Cd; |
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| 985 | ELSE |
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| 986 | !! Updating the neutral 10m transfer coefficients : |
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[4333] | 987 | Cd_n10 = 1.e-3 * (2.7/U_n10 + 0.142 + U_n10/13.09) ! L & Y eq. (6a) |
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[3294] | 988 | sqrt_Cd_n10 = sqrt(Cd_n10) |
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[4333] | 989 | Ce_n10 = 1.e-3 * (34.6 * sqrt_Cd_n10) ! L & Y eq. (6b) |
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[3294] | 990 | stab = 0.5 + sign(0.5,zeta_u) |
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[4333] | 991 | Ch_n10 = 1.e-3*sqrt_Cd_n10*(18.*stab + 32.7*(1.-stab)) ! L & Y eq. (6c-6d) |
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[3294] | 992 | !! |
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| 993 | !! |
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| 994 | !! Shifting the neutral 10m transfer coefficients to (zu,zeta_u) : |
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[4245] | 995 | xct = 1. + sqrt_Cd_n10/kappa*(log(zu/10.) - zpsi_m) ! L & Y eq. (10a) |
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[3294] | 996 | Cd = Cd_n10/(xct*xct) ; sqrt_Cd = sqrt(Cd) |
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| 997 | ENDIF |
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[888] | 998 | !! |
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| 999 | xlogt = log(zu/10.) - zpsi_hu |
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| 1000 | !! |
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[4245] | 1001 | xct = 1. + Ch_n10*xlogt/kappa/sqrt_Cd_n10 ! L & Y eq. (10b) |
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[888] | 1002 | Ch = Ch_n10*sqrt_Cd/sqrt_Cd_n10/xct |
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| 1003 | !! |
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[4245] | 1004 | xct = 1. + Ce_n10*xlogt/kappa/sqrt_Cd_n10 ! L & Y eq. (10c) |
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[888] | 1005 | Ce = Ce_n10*sqrt_Cd/sqrt_Cd_n10/xct |
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| 1006 | !! |
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| 1007 | !! |
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| 1008 | END DO |
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| 1009 | !! |
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[3294] | 1010 | CALL wrk_dealloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) |
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| 1011 | CALL wrk_dealloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta_u, zeta_t, U_n10 ) |
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| 1012 | CALL wrk_dealloc( jpi,jpj, xlogt, xct, zpsi_hu, zpsi_ht, zpsi_m ) |
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| 1013 | CALL wrk_dealloc( jpi,jpj, stab ) ! interger |
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[2715] | 1014 | ! |
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[3294] | 1015 | IF( nn_timing == 1 ) CALL timing_stop('TURB_CORE_2Z') |
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| 1016 | ! |
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[888] | 1017 | END SUBROUTINE TURB_CORE_2Z |
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| 1018 | |
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| 1019 | |
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| 1020 | FUNCTION psi_m(zta) !! Psis, L & Y eq. (8c), (8d), (8e) |
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[2715] | 1021 | !------------------------------------------------------------------------------- |
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[888] | 1022 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: zta |
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| 1023 | |
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| 1024 | REAL(wp), PARAMETER :: pi = 3.141592653589793_wp |
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| 1025 | REAL(wp), DIMENSION(jpi,jpj) :: psi_m |
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[3294] | 1026 | REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit |
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[2715] | 1027 | !------------------------------------------------------------------------------- |
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| 1028 | |
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[3294] | 1029 | CALL wrk_alloc( jpi,jpj, X2, X, stabit ) |
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[2715] | 1030 | |
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[888] | 1031 | X2 = sqrt(abs(1. - 16.*zta)) ; X2 = max(X2 , 1.0) ; X = sqrt(X2) |
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| 1032 | stabit = 0.5 + sign(0.5,zta) |
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[2715] | 1033 | psi_m = -5.*zta*stabit & ! Stable |
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| 1034 | & + (1. - stabit)*(2*log((1. + X)/2) + log((1. + X2)/2) - 2*atan(X) + pi/2) ! Unstable |
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| 1035 | |
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[3294] | 1036 | CALL wrk_dealloc( jpi,jpj, X2, X, stabit ) |
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[2715] | 1037 | ! |
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[888] | 1038 | END FUNCTION psi_m |
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| 1039 | |
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| 1040 | |
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[2715] | 1041 | FUNCTION psi_h( zta ) !! Psis, L & Y eq. (8c), (8d), (8e) |
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| 1042 | !------------------------------------------------------------------------------- |
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| 1043 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: zta |
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| 1044 | ! |
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| 1045 | REAL(wp), DIMENSION(jpi,jpj) :: psi_h |
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[3294] | 1046 | REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit |
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[2715] | 1047 | !------------------------------------------------------------------------------- |
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| 1048 | |
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[3294] | 1049 | CALL wrk_alloc( jpi,jpj, X2, X, stabit ) |
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[2715] | 1050 | |
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[888] | 1051 | X2 = sqrt(abs(1. - 16.*zta)) ; X2 = max(X2 , 1.) ; X = sqrt(X2) |
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| 1052 | stabit = 0.5 + sign(0.5,zta) |
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| 1053 | psi_h = -5.*zta*stabit & ! Stable |
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[2715] | 1054 | & + (1. - stabit)*(2.*log( (1. + X2)/2. )) ! Unstable |
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| 1055 | |
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[3294] | 1056 | CALL wrk_dealloc( jpi,jpj, X2, X, stabit ) |
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[2715] | 1057 | ! |
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[888] | 1058 | END FUNCTION psi_h |
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| 1059 | |
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| 1060 | !!====================================================================== |
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| 1061 | END MODULE sbcblk_core |
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