| 1 | MODULE usrdef_sbc |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE usrdef_sbc *** |
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| 4 | !! |
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| 5 | !! === ICE_ADV1D configuration === |
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| 6 | !! |
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| 7 | !! User defined : surface forcing of a user configuration |
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| 8 | !!====================================================================== |
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| 9 | !! History : 4.0 ! 2016-03 (S. Flavoni, G. Madec) user defined interface |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | !! usr_def_sbc : user defined surface bounday conditions in ICE_ADV1D case |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | USE oce ! ocean dynamics and tracers |
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| 16 | USE dom_oce ! ocean space and time domain |
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| 17 | USE sbc_oce ! Surface boundary condition: ocean fields |
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| 18 | USE sbc_ice ! Surface boundary condition: ice fields |
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| 19 | USE phycst ! physical constants |
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| 20 | USE ice, ONLY : at_i_b, a_i_b |
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| 21 | USE icethd_dh ! for CALL ice_thd_snwblow |
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| 22 | ! |
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| 23 | USE in_out_manager ! I/O manager |
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| 24 | USE lib_mpp ! distribued memory computing library |
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| 25 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 26 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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| 27 | |
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| 28 | IMPLICIT NONE |
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| 29 | PRIVATE |
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| 30 | |
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| 31 | PUBLIC usrdef_sbc_oce ! routine called by sbcmod.F90 for sbc ocean |
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| 32 | PUBLIC usrdef_sbc_ice_tau ! routine called by icestp.F90 for ice dynamics |
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| 33 | PUBLIC usrdef_sbc_ice_flx ! routine called by icestp.F90 for ice thermo |
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| 34 | |
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| 35 | !! * Substitutions |
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| 36 | # include "vectopt_loop_substitute.h90" |
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| 37 | !!---------------------------------------------------------------------- |
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| 38 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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| 39 | !! $Id: usrdef_sbc.F90 10074 2018-08-28 16:15:49Z nicolasmartin $ |
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| 40 | !! Software governed by the CeCILL license (see ./LICENSE) |
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| 41 | !!---------------------------------------------------------------------- |
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| 42 | CONTAINS |
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| 43 | |
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| 44 | SUBROUTINE usrdef_sbc_oce( kt ) |
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| 45 | !!--------------------------------------------------------------------- |
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| 46 | !! *** ROUTINE usr_def_sbc *** |
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| 47 | !! |
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| 48 | !! ** Purpose : provide at each time-step the surface boundary |
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| 49 | !! condition, i.e. the momentum, heat and freshwater fluxes. |
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| 50 | !! |
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| 51 | !! ** Method : all 0 fields, for ICE_ADV1D case |
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| 52 | !! CAUTION : never mask the surface stress field ! |
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| 53 | !! |
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| 54 | !! ** Action : - set to ZERO all the ocean surface boundary condition, i.e. |
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| 55 | !! utau, vtau, taum, wndm, qns, qsr, emp, sfx |
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| 56 | !! |
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| 57 | !!---------------------------------------------------------------------- |
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| 58 | INTEGER, INTENT(in) :: kt ! ocean time step |
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| 59 | !!--------------------------------------------------------------------- |
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| 60 | ! |
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| 61 | IF( kt == nit000 ) THEN |
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| 62 | ! |
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| 63 | IF(lwp) WRITE(numout,*)' usrdef_sbc_oce : ICE_ADV1D case: NO surface forcing' |
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| 64 | ! --- oce variables --- ! |
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| 65 | utau(:,:) = 0._wp |
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| 66 | vtau(:,:) = 0._wp |
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| 67 | taum(:,:) = 0._wp |
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| 68 | wndm(:,:) = 0._wp |
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| 69 | ! |
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| 70 | emp (:,:) = 0._wp |
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| 71 | sfx (:,:) = 0._wp |
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| 72 | qns (:,:) = 0._wp |
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| 73 | qsr (:,:) = 0._wp |
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| 74 | ! |
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| 75 | utau_b(:,:) = 0._wp |
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| 76 | vtau_b(:,:) = 0._wp |
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| 77 | emp_b (:,:) = 0._wp |
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| 78 | sfx_b (:,:) = 0._wp |
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| 79 | qns_b (:,:) = 0._wp |
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| 80 | ! |
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| 81 | ENDIF |
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| 82 | ! |
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| 83 | END SUBROUTINE usrdef_sbc_oce |
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| 84 | |
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| 85 | SUBROUTINE usrdef_sbc_ice_tau( kt ) |
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| 86 | !!--------------------------------------------------------------------- |
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| 87 | !! *** ROUTINE usrdef_sbc_ice_tau *** |
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| 88 | !! |
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| 89 | !! ** Purpose : provide the surface boundary (momentum) condition over sea-ice |
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| 90 | !!--------------------------------------------------------------------- |
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| 91 | INTEGER, INTENT(in) :: kt ! ocean time step |
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| 92 | !!--------------------------------------------------------------------- |
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| 93 | IF( kt==nit000 .AND. lwp) WRITE(numout,*)' usrdef_sbc_ice : ICE_ADV1D case: no stress forcing' |
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| 94 | ! |
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| 95 | utau_ice(:,:) = 0._wp |
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| 96 | vtau_ice(:,:) = 0._wp |
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| 97 | ! |
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| 98 | END SUBROUTINE usrdef_sbc_ice_tau |
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| 99 | |
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| 100 | SUBROUTINE usrdef_sbc_ice_flx( kt, phs, phi ) |
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| 101 | !!--------------------------------------------------------------------- |
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| 102 | !! *** ROUTINE usrdef_sbc_ice_flx *** |
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| 103 | !! |
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| 104 | !! ** Purpose : provide the surface boundary (flux) condition over sea-ice |
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| 105 | !!--------------------------------------------------------------------- |
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| 106 | INTEGER, INTENT(in) :: kt ! ocean time step |
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| 107 | REAL(wp), DIMENSION(:,:,:), INTENT(in) :: phs ! snow thickness |
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| 108 | REAL(wp), DIMENSION(:,:,:), INTENT(in) :: phi ! ice thickness |
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| 109 | !! |
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| 110 | INTEGER :: jl |
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| 111 | REAL(wp) :: zfr1, zfr2 ! local variables |
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| 112 | REAL(wp), DIMENSION(jpi,jpj) :: zsnw ! snw distribution after wind blowing |
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| 113 | REAL(wp), DIMENSION(jpi,jpj) :: ztri |
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| 114 | !!--------------------------------------------------------------------- |
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| 115 | ! |
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| 116 | IF( kt==nit000 .AND. lwp) WRITE(numout,*)' usrdef_sbc_ice : ICE_ADV1D case: NO flux forcing' |
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| 117 | ! |
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| 118 | ! ocean variables (renaming) |
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| 119 | emp_oce (:,:) = 0._wp ! uniform value for freshwater budget (E-P) |
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| 120 | qsr_oce (:,:) = 0._wp ! uniform value for solar radiation |
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| 121 | qns_oce (:,:) = 0._wp ! uniform value for non-solar radiation |
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| 122 | |
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| 123 | ! ice variables |
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| 124 | alb_ice (:,:,:) = 0.7_wp ! useless |
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| 125 | qsr_ice (:,:,:) = 0._wp ! uniform value for solar radiation |
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| 126 | qns_ice (:,:,:) = 0._wp ! uniform value for non-solar radiation |
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| 127 | sprecip (:,:) = 0._wp ! uniform value for snow precip |
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| 128 | evap_ice(:,:,:) = 0._wp ! uniform value for sublimation |
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| 129 | |
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| 130 | ! ice fields deduced from above |
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| 131 | zsnw(:,:) = 1._wp |
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| 132 | !!CALL lim_thd_snwblow( at_i_b, zsnw ) ! snow distribution over ice after wind blowing |
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| 133 | emp_ice (:,:) = SUM( a_i_b(:,:,:) * evap_ice(:,:,:), dim=3 ) - sprecip(:,:) * zsnw(:,:) |
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| 134 | emp_oce (:,:) = emp_oce(:,:) - sprecip(:,:) * (1._wp - zsnw(:,:) ) |
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| 135 | qevap_ice(:,:,:) = 0._wp |
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| 136 | qprec_ice(:,:) = rhos * ( sst_m(:,:) * rcpi - rLfus ) * tmask(:,:,1) ! in J/m3 |
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| 137 | qemp_oce (:,:) = - emp_oce(:,:) * sst_m(:,:) * rcp |
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| 138 | qemp_ice (:,:) = sprecip(:,:) * zsnw * ( sst_m(:,:) * rcpi - rLfus ) * tmask(:,:,1) ! solid precip (only) |
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| 139 | |
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| 140 | ! total fluxes |
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| 141 | emp_tot (:,:) = emp_ice + emp_oce |
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| 142 | qns_tot (:,:) = at_i_b(:,:) * qns_oce(:,:) + SUM( a_i_b(:,:,:) * qns_ice(:,:,:), dim=3 ) + qemp_ice(:,:) + qemp_oce(:,:) |
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| 143 | qsr_tot (:,:) = at_i_b(:,:) * qsr_oce(:,:) + SUM( a_i_b(:,:,:) * qsr_ice(:,:,:), dim=3 ) |
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| 144 | |
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| 145 | ! --- shortwave radiation transmitted below the surface (W/m2, see Grenfell Maykut 77) --- ! |
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| 146 | cloud_fra(:,:) = pp_cldf |
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| 147 | ztri(:,:) = 0.18 * ( 1.0 - cloud_fra(:,:) ) + 0.35 * cloud_fra(:,:) ! surface transmission when hi>10cm |
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| 148 | ! |
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| 149 | DO jl = 1, jpl |
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| 150 | WHERE ( phs(:,:,jl) <= 0._wp .AND. phi(:,:,jl) < 0.1_wp ) ! linear decrease from hi=0 to 10cm |
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| 151 | qtr_ice_top(:,:,jl) = qsr_ice(:,:,jl) * ( ztri(:,:) + ( 1._wp - ztri(:,:) ) * ( 1._wp - phi(:,:,jl) * 10._wp ) ) |
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| 152 | ELSEWHERE( phs(:,:,jl) <= 0._wp .AND. phi(:,:,jl) >= 0.1_wp ) ! constant (ztri) when hi>10cm |
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| 153 | qtr_ice_top(:,:,jl) = qsr_ice(:,:,jl) * ztri(:,:) |
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| 154 | ELSEWHERE ! zero when hs>0 |
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| 155 | qtr_ice_top(:,:,jl) = 0._wp |
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| 156 | END WHERE |
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| 157 | ENDDO |
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| 158 | |
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| 159 | |
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| 160 | END SUBROUTINE usrdef_sbc_ice_flx |
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| 161 | |
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| 162 | |
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| 163 | !!====================================================================== |
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| 164 | END MODULE usrdef_sbc |
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