[8586] | 1 | MODULE iceupdate |
---|
| 2 | !!====================================================================== |
---|
| 3 | !! *** MODULE iceupdate *** |
---|
| 4 | !! Sea-ice : computation of the flux at the sea ice/ocean interface |
---|
| 5 | !!====================================================================== |
---|
[9604] | 6 | !! History : 4.0 ! 2018 (many people) SI3 [aka Sea Ice cube] |
---|
[8586] | 7 | !!---------------------------------------------------------------------- |
---|
[9570] | 8 | #if defined key_si3 |
---|
[8586] | 9 | !!---------------------------------------------------------------------- |
---|
[9570] | 10 | !! 'key_si3' SI3 sea-ice model |
---|
[8586] | 11 | !!---------------------------------------------------------------------- |
---|
| 12 | !! ice_update_alloc : allocate the iceupdate arrays |
---|
| 13 | !! ice_update_init : initialisation |
---|
| 14 | !! ice_update_flx : updates mass, heat and salt fluxes at the ocean surface |
---|
| 15 | !! ice_update_tau : update i- and j-stresses, and its modulus at the ocean surface |
---|
| 16 | !!---------------------------------------------------------------------- |
---|
| 17 | USE phycst ! physical constants |
---|
| 18 | USE dom_oce ! ocean domain |
---|
| 19 | USE ice ! sea-ice: variables |
---|
[9071] | 20 | USE sbc_ice ! Surface boundary condition: ice fields |
---|
| 21 | USE sbc_oce ! Surface boundary condition: ocean fields |
---|
[8586] | 22 | USE sbccpl ! Surface boundary condition: coupled interface |
---|
| 23 | USE icealb ! sea-ice: albedo parameters |
---|
| 24 | USE traqsr ! add penetration of solar flux in the calculation of heat budget |
---|
| 25 | USE icectl ! sea-ice: control prints |
---|
| 26 | USE bdy_oce , ONLY : ln_bdy |
---|
| 27 | ! |
---|
| 28 | USE in_out_manager ! I/O manager |
---|
| 29 | USE iom ! I/O manager library |
---|
| 30 | USE lib_mpp ! MPP library |
---|
| 31 | USE lib_fortran ! fortran utilities (glob_sum + no signed zero) |
---|
| 32 | USE lbclnk ! lateral boundary conditions (or mpp links) |
---|
| 33 | USE timing ! Timing |
---|
| 34 | |
---|
| 35 | IMPLICIT NONE |
---|
| 36 | PRIVATE |
---|
| 37 | |
---|
| 38 | PUBLIC ice_update_init ! called by ice_init |
---|
| 39 | PUBLIC ice_update_flx ! called by ice_stp |
---|
| 40 | PUBLIC ice_update_tau ! called by ice_stp |
---|
| 41 | |
---|
| 42 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: utau_oce, vtau_oce ! air-ocean surface i- & j-stress [N/m2] |
---|
| 43 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: tmod_io ! modulus of the ice-ocean velocity [m/s] |
---|
| 44 | |
---|
| 45 | !! * Substitutions |
---|
[12377] | 46 | # include "do_loop_substitute.h90" |
---|
[8586] | 47 | !!---------------------------------------------------------------------- |
---|
[9598] | 48 | !! NEMO/ICE 4.0 , NEMO Consortium (2018) |
---|
[10069] | 49 | !! $Id$ |
---|
[10068] | 50 | !! Software governed by the CeCILL license (see ./LICENSE) |
---|
[8586] | 51 | !!---------------------------------------------------------------------- |
---|
| 52 | CONTAINS |
---|
| 53 | |
---|
| 54 | INTEGER FUNCTION ice_update_alloc() |
---|
| 55 | !!------------------------------------------------------------------- |
---|
| 56 | !! *** ROUTINE ice_update_alloc *** |
---|
| 57 | !!------------------------------------------------------------------- |
---|
| 58 | ALLOCATE( utau_oce(jpi,jpj), vtau_oce(jpi,jpj), tmod_io(jpi,jpj), STAT=ice_update_alloc ) |
---|
| 59 | ! |
---|
[10425] | 60 | CALL mpp_sum( 'iceupdate', ice_update_alloc ) |
---|
| 61 | IF( ice_update_alloc /= 0 ) CALL ctl_stop( 'STOP', 'ice_update_alloc: failed to allocate arrays' ) |
---|
[8586] | 62 | ! |
---|
| 63 | END FUNCTION ice_update_alloc |
---|
| 64 | |
---|
| 65 | |
---|
| 66 | SUBROUTINE ice_update_flx( kt ) |
---|
| 67 | !!------------------------------------------------------------------- |
---|
| 68 | !! *** ROUTINE ice_update_flx *** |
---|
| 69 | !! |
---|
| 70 | !! ** Purpose : Update the surface ocean boundary condition for heat |
---|
| 71 | !! salt and mass over areas where sea-ice is non-zero |
---|
| 72 | !! |
---|
| 73 | !! ** Action : - computes the heat and freshwater/salt fluxes |
---|
| 74 | !! at the ice-ocean interface. |
---|
| 75 | !! - Update the ocean sbc |
---|
| 76 | !! |
---|
| 77 | !! ** Outputs : - qsr : sea heat flux: solar |
---|
| 78 | !! - qns : sea heat flux: non solar |
---|
| 79 | !! - emp : freshwater budget: volume flux |
---|
| 80 | !! - sfx : salt flux |
---|
| 81 | !! - fr_i : ice fraction |
---|
| 82 | !! - tn_ice : sea-ice surface temperature |
---|
| 83 | !! - alb_ice : sea-ice albedo (recomputed only for coupled mode) |
---|
| 84 | !! |
---|
| 85 | !! References : Goosse, H. et al. 1996, Bul. Soc. Roy. Sc. Liege, 65, 87-90. |
---|
| 86 | !! Tartinville et al. 2001 Ocean Modelling, 3, 95-108. |
---|
| 87 | !! These refs are now obsolete since everything has been revised |
---|
| 88 | !! The ref should be Rousset et al., 2015 |
---|
| 89 | !!--------------------------------------------------------------------- |
---|
| 90 | INTEGER, INTENT(in) :: kt ! number of iteration |
---|
| 91 | ! |
---|
| 92 | INTEGER :: ji, jj, jl, jk ! dummy loop indices |
---|
| 93 | REAL(wp) :: zqmass ! Heat flux associated with mass exchange ice->ocean (W.m-2) |
---|
| 94 | REAL(wp) :: zqsr ! New solar flux received by the ocean |
---|
| 95 | REAL(wp), DIMENSION(jpi,jpj) :: z2d ! 2D workspace |
---|
| 96 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zalb_cs, zalb_os ! 3D workspace |
---|
| 97 | !!--------------------------------------------------------------------- |
---|
[9124] | 98 | IF( ln_timing ) CALL timing_start('ice_update') |
---|
[8586] | 99 | |
---|
| 100 | IF( kt == nit000 .AND. lwp ) THEN |
---|
| 101 | WRITE(numout,*) |
---|
| 102 | WRITE(numout,*)'ice_update_flx: update fluxes (mass, salt and heat) at the ice-ocean interface' |
---|
| 103 | WRITE(numout,*)'~~~~~~~~~~~~~~' |
---|
| 104 | ENDIF |
---|
| 105 | |
---|
| 106 | ! --- case we bypass ice thermodynamics --- ! |
---|
| 107 | IF( .NOT. ln_icethd ) THEN ! we suppose ice is impermeable => ocean is isolated from atmosphere |
---|
[9912] | 108 | qt_atm_oi (:,:) = ( 1._wp - at_i_b(:,:) ) * ( qns_oce(:,:) + qsr_oce(:,:) ) + qemp_oce(:,:) |
---|
| 109 | qt_oce_ai (:,:) = ( 1._wp - at_i_b(:,:) ) * qns_oce(:,:) + qemp_oce(:,:) |
---|
[9910] | 110 | emp_ice (:,:) = 0._wp |
---|
| 111 | qemp_ice (:,:) = 0._wp |
---|
| 112 | qevap_ice (:,:,:) = 0._wp |
---|
[8586] | 113 | ENDIF |
---|
| 114 | |
---|
[12377] | 115 | DO_2D_11_11 |
---|
[8586] | 116 | |
---|
[12377] | 117 | ! Solar heat flux reaching the ocean = zqsr (W.m-2) |
---|
| 118 | !--------------------------------------------------- |
---|
| 119 | zqsr = qsr_tot(ji,jj) - SUM( a_i_b(ji,jj,:) * ( qsr_ice(ji,jj,:) - qtr_ice_bot(ji,jj,:) ) ) |
---|
[8586] | 120 | |
---|
[12377] | 121 | ! Total heat flux reaching the ocean = qt_oce_ai (W.m-2) |
---|
| 122 | !--------------------------------------------------- |
---|
| 123 | zqmass = hfx_thd(ji,jj) + hfx_dyn(ji,jj) + hfx_res(ji,jj) ! heat flux from snow is 0 (T=0 degC) |
---|
| 124 | qt_oce_ai(ji,jj) = qt_oce_ai(ji,jj) + zqmass + zqsr |
---|
[8586] | 125 | |
---|
[12377] | 126 | ! Add the residual from heat diffusion equation and sublimation (W.m-2) |
---|
| 127 | !---------------------------------------------------------------------- |
---|
| 128 | qt_oce_ai(ji,jj) = qt_oce_ai(ji,jj) + hfx_err_dif(ji,jj) + & |
---|
| 129 | & ( hfx_sub(ji,jj) - SUM( qevap_ice(ji,jj,:) * a_i_b(ji,jj,:) ) ) |
---|
[8586] | 130 | |
---|
[12377] | 131 | ! New qsr and qns used to compute the oceanic heat flux at the next time step |
---|
| 132 | !---------------------------------------------------------------------------- |
---|
| 133 | qsr(ji,jj) = zqsr |
---|
| 134 | qns(ji,jj) = qt_oce_ai(ji,jj) - zqsr |
---|
[8586] | 135 | |
---|
[12377] | 136 | ! Mass flux at the atm. surface |
---|
| 137 | !----------------------------------- |
---|
| 138 | wfx_sub(ji,jj) = wfx_snw_sub(ji,jj) + wfx_ice_sub(ji,jj) |
---|
[8586] | 139 | |
---|
[12377] | 140 | ! Mass flux at the ocean surface |
---|
| 141 | !------------------------------------ |
---|
| 142 | ! case of realistic freshwater flux (Tartinville et al., 2001) (presently ACTIVATED) |
---|
| 143 | ! ------------------------------------------------------------------------------------- |
---|
| 144 | ! The idea of this approach is that the system that we consider is the ICE-OCEAN system |
---|
| 145 | ! Thus FW flux = External ( E-P+snow melt) |
---|
| 146 | ! Salt flux = Exchanges in the ice-ocean system then converted into FW |
---|
| 147 | ! Associated to Ice formation AND Ice melting |
---|
| 148 | ! Even if i see Ice melting as a FW and SALT flux |
---|
| 149 | ! |
---|
| 150 | ! mass flux from ice/ocean |
---|
| 151 | wfx_ice(ji,jj) = wfx_bog(ji,jj) + wfx_bom(ji,jj) + wfx_sum(ji,jj) + wfx_sni(ji,jj) & |
---|
| 152 | & + wfx_opw(ji,jj) + wfx_dyn(ji,jj) + wfx_res(ji,jj) + wfx_lam(ji,jj) + wfx_pnd(ji,jj) |
---|
[8586] | 153 | |
---|
[12377] | 154 | ! add the snow melt water to snow mass flux to the ocean |
---|
| 155 | wfx_snw(ji,jj) = wfx_snw_sni(ji,jj) + wfx_snw_dyn(ji,jj) + wfx_snw_sum(ji,jj) |
---|
[8586] | 156 | |
---|
[12377] | 157 | ! mass flux at the ocean/ice interface |
---|
| 158 | fmmflx(ji,jj) = - ( wfx_ice(ji,jj) + wfx_snw(ji,jj) + wfx_err_sub(ji,jj) ) ! F/M mass flux save at least for biogeochemical model |
---|
| 159 | emp(ji,jj) = emp_oce(ji,jj) - wfx_ice(ji,jj) - wfx_snw(ji,jj) - wfx_err_sub(ji,jj) ! mass flux + F/M mass flux (always ice/ocean mass exchange) |
---|
[8586] | 160 | |
---|
| 161 | |
---|
[12377] | 162 | ! Salt flux at the ocean surface |
---|
| 163 | !------------------------------------------ |
---|
| 164 | sfx(ji,jj) = sfx_bog(ji,jj) + sfx_bom(ji,jj) + sfx_sum(ji,jj) + sfx_sni(ji,jj) + sfx_opw(ji,jj) & |
---|
| 165 | & + sfx_res(ji,jj) + sfx_dyn(ji,jj) + sfx_bri(ji,jj) + sfx_sub(ji,jj) + sfx_lam(ji,jj) |
---|
| 166 | |
---|
| 167 | ! Mass of snow and ice per unit area |
---|
| 168 | !---------------------------------------- |
---|
| 169 | snwice_mass_b(ji,jj) = snwice_mass(ji,jj) ! save mass from the previous ice time step |
---|
| 170 | ! ! new mass per unit area |
---|
| 171 | snwice_mass (ji,jj) = tmask(ji,jj,1) * ( rhos * vt_s(ji,jj) + rhoi * vt_i(ji,jj) ) |
---|
| 172 | ! ! time evolution of snow+ice mass |
---|
[12489] | 173 | snwice_fmass (ji,jj) = ( snwice_mass(ji,jj) - snwice_mass_b(ji,jj) ) * r1_Dt_ice |
---|
[12377] | 174 | |
---|
| 175 | END_2D |
---|
[8586] | 176 | |
---|
| 177 | ! Storing the transmitted variables |
---|
| 178 | !---------------------------------- |
---|
| 179 | fr_i (:,:) = at_i(:,:) ! Sea-ice fraction |
---|
| 180 | tn_ice(:,:,:) = t_su(:,:,:) ! Ice surface temperature |
---|
| 181 | |
---|
| 182 | ! Snow/ice albedo (only if sent to coupler, useless in forced mode) |
---|
| 183 | !------------------------------------------------------------------ |
---|
[8637] | 184 | CALL ice_alb( t_su, h_i, h_s, ln_pnd_alb, a_ip_frac, h_ip, zalb_cs, zalb_os ) ! cloud-sky and overcast-sky ice albedos |
---|
[8586] | 185 | ! |
---|
| 186 | alb_ice(:,:,:) = ( 1._wp - cldf_ice ) * zalb_cs(:,:,:) + cldf_ice * zalb_os(:,:,:) |
---|
| 187 | ! |
---|
| 188 | IF( lrst_ice ) THEN !* write snwice_mass fields in the restart file |
---|
| 189 | CALL update_rst( 'WRITE', kt ) |
---|
| 190 | ENDIF |
---|
| 191 | ! |
---|
| 192 | ! output all fluxes |
---|
| 193 | !------------------ |
---|
[8884] | 194 | ! |
---|
| 195 | ! --- salt fluxes [kg/m2/s] --- ! |
---|
| 196 | ! ! sfxice = sfxbog + sfxbom + sfxsum + sfxsni + sfxopw + sfxres + sfxdyn + sfxbri + sfxsub + sfxlam |
---|
[11536] | 197 | IF( iom_use('sfxice' ) ) CALL iom_put( 'sfxice', sfx * 1.e-03 ) ! salt flux from total ice growth/melt |
---|
| 198 | IF( iom_use('sfxbog' ) ) CALL iom_put( 'sfxbog', sfx_bog * 1.e-03 ) ! salt flux from bottom growth |
---|
| 199 | IF( iom_use('sfxbom' ) ) CALL iom_put( 'sfxbom', sfx_bom * 1.e-03 ) ! salt flux from bottom melting |
---|
| 200 | IF( iom_use('sfxsum' ) ) CALL iom_put( 'sfxsum', sfx_sum * 1.e-03 ) ! salt flux from surface melting |
---|
| 201 | IF( iom_use('sfxlam' ) ) CALL iom_put( 'sfxlam', sfx_lam * 1.e-03 ) ! salt flux from lateral melting |
---|
| 202 | IF( iom_use('sfxsni' ) ) CALL iom_put( 'sfxsni', sfx_sni * 1.e-03 ) ! salt flux from snow ice formation |
---|
| 203 | IF( iom_use('sfxopw' ) ) CALL iom_put( 'sfxopw', sfx_opw * 1.e-03 ) ! salt flux from open water formation |
---|
| 204 | IF( iom_use('sfxdyn' ) ) CALL iom_put( 'sfxdyn', sfx_dyn * 1.e-03 ) ! salt flux from ridging rafting |
---|
| 205 | IF( iom_use('sfxbri' ) ) CALL iom_put( 'sfxbri', sfx_bri * 1.e-03 ) ! salt flux from brines |
---|
| 206 | IF( iom_use('sfxres' ) ) CALL iom_put( 'sfxres', sfx_res * 1.e-03 ) ! salt flux from undiagnosed processes |
---|
| 207 | IF( iom_use('sfxsub' ) ) CALL iom_put( 'sfxsub', sfx_sub * 1.e-03 ) ! salt flux from sublimation |
---|
[8586] | 208 | |
---|
[8884] | 209 | ! --- mass fluxes [kg/m2/s] --- ! |
---|
[11536] | 210 | CALL iom_put( 'emp_oce', emp_oce ) ! emp over ocean (taking into account the snow blown away from the ice) |
---|
| 211 | CALL iom_put( 'emp_ice', emp_ice ) ! emp over ice (taking into account the snow blown away from the ice) |
---|
[8586] | 212 | |
---|
[8884] | 213 | ! ! vfxice = vfxbog + vfxbom + vfxsum + vfxsni + vfxopw + vfxdyn + vfxres + vfxlam + vfxpnd |
---|
[11536] | 214 | CALL iom_put( 'vfxice' , wfx_ice ) ! mass flux from total ice growth/melt |
---|
| 215 | CALL iom_put( 'vfxbog' , wfx_bog ) ! mass flux from bottom growth |
---|
| 216 | CALL iom_put( 'vfxbom' , wfx_bom ) ! mass flux from bottom melt |
---|
| 217 | CALL iom_put( 'vfxsum' , wfx_sum ) ! mass flux from surface melt |
---|
| 218 | CALL iom_put( 'vfxlam' , wfx_lam ) ! mass flux from lateral melt |
---|
| 219 | CALL iom_put( 'vfxsni' , wfx_sni ) ! mass flux from snow-ice formation |
---|
| 220 | CALL iom_put( 'vfxopw' , wfx_opw ) ! mass flux from growth in open water |
---|
| 221 | CALL iom_put( 'vfxdyn' , wfx_dyn ) ! mass flux from dynamics (ridging) |
---|
| 222 | CALL iom_put( 'vfxres' , wfx_res ) ! mass flux from undiagnosed processes |
---|
| 223 | CALL iom_put( 'vfxpnd' , wfx_pnd ) ! mass flux from melt ponds |
---|
| 224 | CALL iom_put( 'vfxsub' , wfx_ice_sub ) ! mass flux from ice sublimation (ice-atm.) |
---|
| 225 | CALL iom_put( 'vfxsub_err', wfx_err_sub ) ! "excess" of sublimation sent to ocean |
---|
[8586] | 226 | |
---|
[11536] | 227 | IF ( iom_use( 'vfxthin' ) ) THEN ! mass flux from ice growth in open water + thin ice (<20cm) => comparable to observations |
---|
[8586] | 228 | WHERE( hm_i(:,:) < 0.2 .AND. hm_i(:,:) > 0. ) ; z2d = wfx_bog |
---|
| 229 | ELSEWHERE ; z2d = 0._wp |
---|
| 230 | END WHERE |
---|
[11536] | 231 | CALL iom_put( 'vfxthin', wfx_opw + z2d ) |
---|
[8586] | 232 | ENDIF |
---|
| 233 | |
---|
[11536] | 234 | ! ! vfxsnw = vfxsnw_sni + vfxsnw_dyn + vfxsnw_sum |
---|
| 235 | CALL iom_put( 'vfxsnw' , wfx_snw ) ! mass flux from total snow growth/melt |
---|
| 236 | CALL iom_put( 'vfxsnw_sum' , wfx_snw_sum ) ! mass flux from snow melt at the surface |
---|
| 237 | CALL iom_put( 'vfxsnw_sni' , wfx_snw_sni ) ! mass flux from snow melt during snow-ice formation |
---|
| 238 | CALL iom_put( 'vfxsnw_dyn' , wfx_snw_dyn ) ! mass flux from dynamics (ridging) |
---|
| 239 | CALL iom_put( 'vfxsnw_sub' , wfx_snw_sub ) ! mass flux from snow sublimation (ice-atm.) |
---|
| 240 | CALL iom_put( 'vfxsnw_pre' , wfx_spr ) ! snow precip |
---|
[8884] | 241 | |
---|
| 242 | ! --- heat fluxes [W/m2] --- ! |
---|
| 243 | ! ! qt_atm_oi - qt_oce_ai = hfxdhc - ( dihctrp + dshctrp ) |
---|
[11536] | 244 | IF( iom_use('qsr_oce' ) ) CALL iom_put( 'qsr_oce' , qsr_oce * ( 1._wp - at_i_b ) ) ! solar flux at ocean surface |
---|
| 245 | IF( iom_use('qns_oce' ) ) CALL iom_put( 'qns_oce' , qns_oce * ( 1._wp - at_i_b ) + qemp_oce ) ! non-solar flux at ocean surface |
---|
| 246 | IF( iom_use('qsr_ice' ) ) CALL iom_put( 'qsr_ice' , SUM( qsr_ice * a_i_b, dim=3 ) ) ! solar flux at ice surface |
---|
| 247 | IF( iom_use('qns_ice' ) ) CALL iom_put( 'qns_ice' , SUM( qns_ice * a_i_b, dim=3 ) + qemp_ice ) ! non-solar flux at ice surface |
---|
| 248 | IF( iom_use('qtr_ice_bot') ) CALL iom_put( 'qtr_ice_bot', SUM( qtr_ice_bot * a_i_b, dim=3 ) ) ! solar flux transmitted thru ice |
---|
| 249 | IF( iom_use('qtr_ice_top') ) CALL iom_put( 'qtr_ice_top', SUM( qtr_ice_top * a_i_b, dim=3 ) ) ! solar flux transmitted thru ice surface |
---|
| 250 | IF( iom_use('qt_oce' ) ) CALL iom_put( 'qt_oce' , ( qsr_oce + qns_oce ) * ( 1._wp - at_i_b ) + qemp_oce ) |
---|
| 251 | IF( iom_use('qt_ice' ) ) CALL iom_put( 'qt_ice' , SUM( ( qns_ice + qsr_ice ) * a_i_b, dim=3 ) + qemp_ice ) |
---|
| 252 | IF( iom_use('qt_oce_ai' ) ) CALL iom_put( 'qt_oce_ai' , qt_oce_ai * tmask(:,:,1) ) ! total heat flux at the ocean surface: interface oce-(ice+atm) |
---|
| 253 | IF( iom_use('qt_atm_oi' ) ) CALL iom_put( 'qt_atm_oi' , qt_atm_oi * tmask(:,:,1) ) ! total heat flux at the oce-ice surface: interface atm-(ice+oce) |
---|
| 254 | IF( iom_use('qemp_oce' ) ) CALL iom_put( 'qemp_oce' , qemp_oce ) ! Downward Heat Flux from E-P over ocean |
---|
| 255 | IF( iom_use('qemp_ice' ) ) CALL iom_put( 'qemp_ice' , qemp_ice ) ! Downward Heat Flux from E-P over ice |
---|
[8884] | 256 | |
---|
| 257 | ! heat fluxes from ice transformations |
---|
[11536] | 258 | ! ! hfxdhc = hfxbog + hfxbom + hfxsum + hfxopw + hfxdif + hfxsnw - ( hfxthd + hfxdyn + hfxres + hfxsub + hfxspr ) |
---|
| 259 | CALL iom_put ('hfxbog' , hfx_bog ) ! heat flux used for ice bottom growth |
---|
| 260 | CALL iom_put ('hfxbom' , hfx_bom ) ! heat flux used for ice bottom melt |
---|
| 261 | CALL iom_put ('hfxsum' , hfx_sum ) ! heat flux used for ice surface melt |
---|
| 262 | CALL iom_put ('hfxopw' , hfx_opw ) ! heat flux used for ice formation in open water |
---|
| 263 | CALL iom_put ('hfxdif' , hfx_dif ) ! heat flux used for ice temperature change |
---|
| 264 | CALL iom_put ('hfxsnw' , hfx_snw ) ! heat flux used for snow melt |
---|
| 265 | CALL iom_put ('hfxerr' , hfx_err_dif ) ! heat flux error after heat diffusion (included in qt_oce_ai) |
---|
[8884] | 266 | |
---|
| 267 | ! heat fluxes associated with mass exchange (freeze/melt/precip...) |
---|
[11536] | 268 | CALL iom_put ('hfxthd' , hfx_thd ) ! |
---|
| 269 | CALL iom_put ('hfxdyn' , hfx_dyn ) ! |
---|
| 270 | CALL iom_put ('hfxres' , hfx_res ) ! |
---|
| 271 | CALL iom_put ('hfxsub' , hfx_sub ) ! |
---|
| 272 | CALL iom_put ('hfxspr' , hfx_spr ) ! Heat flux from snow precip heat content |
---|
[8884] | 273 | |
---|
| 274 | ! other heat fluxes |
---|
[11536] | 275 | IF( iom_use('hfxsensib' ) ) CALL iom_put( 'hfxsensib' , -qsb_ice_bot * at_i_b ) ! Sensible oceanic heat flux |
---|
| 276 | IF( iom_use('hfxcndbot' ) ) CALL iom_put( 'hfxcndbot' , SUM( qcn_ice_bot * a_i_b, dim=3 ) ) ! Bottom conduction flux |
---|
| 277 | IF( iom_use('hfxcndtop' ) ) CALL iom_put( 'hfxcndtop' , SUM( qcn_ice_top * a_i_b, dim=3 ) ) ! Surface conduction flux |
---|
[8884] | 278 | |
---|
[8586] | 279 | ! controls |
---|
| 280 | !--------- |
---|
[9421] | 281 | #if ! defined key_agrif |
---|
[8586] | 282 | IF( ln_icediachk .AND. .NOT. ln_bdy) CALL ice_cons_final('iceupdate') ! conservation |
---|
[9421] | 283 | #endif |
---|
[8586] | 284 | IF( ln_icectl ) CALL ice_prt (kt, iiceprt, jiceprt, 3, 'Final state ice_update') ! prints |
---|
[12377] | 285 | IF( sn_cfctl%l_prtctl ) CALL ice_prt3D ('iceupdate') ! prints |
---|
[9124] | 286 | IF( ln_timing ) CALL timing_stop ('ice_update') ! timing |
---|
[8586] | 287 | ! |
---|
| 288 | END SUBROUTINE ice_update_flx |
---|
| 289 | |
---|
| 290 | |
---|
| 291 | SUBROUTINE ice_update_tau( kt, pu_oce, pv_oce ) |
---|
| 292 | !!------------------------------------------------------------------- |
---|
| 293 | !! *** ROUTINE ice_update_tau *** |
---|
| 294 | !! |
---|
| 295 | !! ** Purpose : Update the ocean surface stresses due to the ice |
---|
| 296 | !! |
---|
| 297 | !! ** Action : * at each ice time step (every nn_fsbc time step): |
---|
| 298 | !! - compute the modulus of ice-ocean relative velocity |
---|
| 299 | !! (*rho*Cd) at T-point (C-grid) or I-point (B-grid) |
---|
| 300 | !! tmod_io = rhoco * | U_ice-U_oce | |
---|
| 301 | !! - update the modulus of stress at ocean surface |
---|
| 302 | !! taum = (1-a) * taum + a * tmod_io * | U_ice-U_oce | |
---|
| 303 | !! * at each ocean time step (every kt): |
---|
| 304 | !! compute linearized ice-ocean stresses as |
---|
| 305 | !! Utau = tmod_io * | U_ice - pU_oce | |
---|
| 306 | !! using instantaneous current ocean velocity (usually before) |
---|
| 307 | !! |
---|
| 308 | !! NB: - ice-ocean rotation angle no more allowed |
---|
| 309 | !! - here we make an approximation: taum is only computed every ice time step |
---|
| 310 | !! This avoids mutiple average to pass from T -> U,V grids and next from U,V grids |
---|
| 311 | !! to T grid. taum is used in TKE and GLS, which should not be too sensitive to this approximaton... |
---|
| 312 | !! |
---|
| 313 | !! ** Outputs : - utau, vtau : surface ocean i- and j-stress (u- & v-pts) updated with ice-ocean fluxes |
---|
| 314 | !! - taum : modulus of the surface ocean stress (T-point) updated with ice-ocean fluxes |
---|
| 315 | !!--------------------------------------------------------------------- |
---|
| 316 | INTEGER , INTENT(in) :: kt ! ocean time-step index |
---|
| 317 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pu_oce, pv_oce ! surface ocean currents |
---|
| 318 | ! |
---|
| 319 | INTEGER :: ji, jj ! dummy loop indices |
---|
| 320 | REAL(wp) :: zat_u, zutau_ice, zu_t, zmodt ! local scalar |
---|
| 321 | REAL(wp) :: zat_v, zvtau_ice, zv_t, zrhoco ! - - |
---|
| 322 | !!--------------------------------------------------------------------- |
---|
[9124] | 323 | IF( ln_timing ) CALL timing_start('ice_update_tau') |
---|
[8586] | 324 | |
---|
| 325 | IF( kt == nit000 .AND. lwp ) THEN |
---|
| 326 | WRITE(numout,*) |
---|
| 327 | WRITE(numout,*)'ice_update_tau: update stress at the ice-ocean interface' |
---|
| 328 | WRITE(numout,*)'~~~~~~~~~~~~~~' |
---|
| 329 | ENDIF |
---|
| 330 | |
---|
[12489] | 331 | zrhoco = rho0 * rn_cio |
---|
[8586] | 332 | ! |
---|
| 333 | IF( MOD( kt-1, nn_fsbc ) == 0 ) THEN !== Ice time-step only ==! (i.e. surface module time-step) |
---|
[12377] | 334 | DO_2D_00_00 |
---|
| 335 | ! ! 2*(U_ice-U_oce) at T-point |
---|
| 336 | zu_t = u_ice(ji,jj) + u_ice(ji-1,jj) - u_oce(ji,jj) - u_oce(ji-1,jj) |
---|
| 337 | zv_t = v_ice(ji,jj) + v_ice(ji,jj-1) - v_oce(ji,jj) - v_oce(ji,jj-1) |
---|
| 338 | ! ! |U_ice-U_oce|^2 |
---|
| 339 | zmodt = 0.25_wp * ( zu_t * zu_t + zv_t * zv_t ) |
---|
| 340 | ! ! update the ocean stress modulus |
---|
| 341 | taum(ji,jj) = ( 1._wp - at_i(ji,jj) ) * taum(ji,jj) + at_i(ji,jj) * zrhoco * zmodt |
---|
| 342 | tmod_io(ji,jj) = zrhoco * SQRT( zmodt ) ! rhoco * |U_ice-U_oce| at T-point |
---|
| 343 | END_2D |
---|
[13247] | 344 | CALL lbc_lnk_multi( 'iceupdate', taum, 'T', 1.0_wp, tmod_io, 'T', 1.0_wp ) |
---|
[8586] | 345 | ! |
---|
| 346 | utau_oce(:,:) = utau(:,:) !* save the air-ocean stresses at ice time-step |
---|
| 347 | vtau_oce(:,:) = vtau(:,:) |
---|
| 348 | ! |
---|
| 349 | ENDIF |
---|
| 350 | ! |
---|
| 351 | ! !== every ocean time-step ==! |
---|
| 352 | ! |
---|
[12377] | 353 | DO_2D_00_00 |
---|
| 354 | ! ice area at u and v-points |
---|
| 355 | zat_u = ( at_i(ji,jj) * tmask(ji,jj,1) + at_i (ji+1,jj ) * tmask(ji+1,jj ,1) ) & |
---|
| 356 | & / MAX( 1.0_wp , tmask(ji,jj,1) + tmask(ji+1,jj ,1) ) |
---|
| 357 | zat_v = ( at_i(ji,jj) * tmask(ji,jj,1) + at_i (ji ,jj+1 ) * tmask(ji ,jj+1,1) ) & |
---|
| 358 | & / MAX( 1.0_wp , tmask(ji,jj,1) + tmask(ji ,jj+1,1) ) |
---|
| 359 | ! ! linearized quadratic drag formulation |
---|
| 360 | zutau_ice = 0.5_wp * ( tmod_io(ji,jj) + tmod_io(ji+1,jj) ) * ( u_ice(ji,jj) - pu_oce(ji,jj) ) |
---|
| 361 | zvtau_ice = 0.5_wp * ( tmod_io(ji,jj) + tmod_io(ji,jj+1) ) * ( v_ice(ji,jj) - pv_oce(ji,jj) ) |
---|
| 362 | ! ! stresses at the ocean surface |
---|
| 363 | utau(ji,jj) = ( 1._wp - zat_u ) * utau_oce(ji,jj) + zat_u * zutau_ice |
---|
| 364 | vtau(ji,jj) = ( 1._wp - zat_v ) * vtau_oce(ji,jj) + zat_v * zvtau_ice |
---|
| 365 | END_2D |
---|
[13247] | 366 | CALL lbc_lnk_multi( 'iceupdate', utau, 'U', -1.0_wp, vtau, 'V', -1.0_wp ) ! lateral boundary condition |
---|
[8586] | 367 | ! |
---|
[9124] | 368 | IF( ln_timing ) CALL timing_stop('ice_update_tau') |
---|
[8586] | 369 | ! |
---|
| 370 | END SUBROUTINE ice_update_tau |
---|
| 371 | |
---|
| 372 | |
---|
| 373 | SUBROUTINE ice_update_init |
---|
| 374 | !!------------------------------------------------------------------- |
---|
| 375 | !! *** ROUTINE ice_update_init *** |
---|
| 376 | !! |
---|
[9784] | 377 | !! ** Purpose : allocate ice-ocean stress fields and read restarts |
---|
| 378 | !! containing the snow & ice mass |
---|
[8586] | 379 | !! |
---|
| 380 | !!------------------------------------------------------------------- |
---|
| 381 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
| 382 | REAL(wp) :: zcoefu, zcoefv, zcoeff ! local scalar |
---|
| 383 | !!------------------------------------------------------------------- |
---|
| 384 | ! |
---|
| 385 | IF(lwp) WRITE(numout,*) |
---|
[9784] | 386 | IF(lwp) WRITE(numout,*) 'ice_update_init: ice-ocean stress init' |
---|
[8586] | 387 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~~' |
---|
[9124] | 388 | ! |
---|
[8586] | 389 | ! ! allocate ice_update array |
---|
| 390 | IF( ice_update_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'ice_update_init : unable to allocate standard arrays' ) |
---|
| 391 | ! |
---|
| 392 | CALL update_rst( 'READ' ) !* read or initialize all required files |
---|
| 393 | ! |
---|
| 394 | END SUBROUTINE ice_update_init |
---|
| 395 | |
---|
[9124] | 396 | |
---|
[8586] | 397 | SUBROUTINE update_rst( cdrw, kt ) |
---|
| 398 | !!--------------------------------------------------------------------- |
---|
| 399 | !! *** ROUTINE rhg_evp_rst *** |
---|
| 400 | !! |
---|
| 401 | !! ** Purpose : Read or write RHG file in restart file |
---|
| 402 | !! |
---|
| 403 | !! ** Method : use of IOM library |
---|
| 404 | !!---------------------------------------------------------------------- |
---|
[11536] | 405 | CHARACTER(len=*) , INTENT(in) :: cdrw ! 'READ'/'WRITE' flag |
---|
[8586] | 406 | INTEGER, OPTIONAL, INTENT(in) :: kt ! ice time-step |
---|
| 407 | ! |
---|
| 408 | INTEGER :: iter ! local integer |
---|
| 409 | INTEGER :: id1 ! local integer |
---|
| 410 | !!---------------------------------------------------------------------- |
---|
| 411 | ! |
---|
| 412 | IF( TRIM(cdrw) == 'READ' ) THEN ! Read/initialize |
---|
| 413 | ! ! --------------- |
---|
| 414 | IF( ln_rstart ) THEN !* Read the restart file |
---|
| 415 | ! |
---|
| 416 | id1 = iom_varid( numrir, 'snwice_mass' , ldstop = .FALSE. ) |
---|
| 417 | ! |
---|
| 418 | IF( id1 > 0 ) THEN ! fields exist |
---|
[12738] | 419 | CALL iom_get( numrir, jpdom_auto, 'snwice_mass' , snwice_mass ) |
---|
| 420 | CALL iom_get( numrir, jpdom_auto, 'snwice_mass_b', snwice_mass_b ) |
---|
[8586] | 421 | ELSE ! start from rest |
---|
| 422 | IF(lwp) WRITE(numout,*) ' ==>> previous run without snow-ice mass output then set it' |
---|
[9935] | 423 | snwice_mass (:,:) = tmask(:,:,1) * ( rhos * vt_s(:,:) + rhoi * vt_i(:,:) ) |
---|
[8586] | 424 | snwice_mass_b(:,:) = snwice_mass(:,:) |
---|
| 425 | ENDIF |
---|
| 426 | ELSE !* Start from rest |
---|
| 427 | IF(lwp) WRITE(numout,*) ' ==>> start from rest: set the snow-ice mass' |
---|
[9935] | 428 | snwice_mass (:,:) = tmask(:,:,1) * ( rhos * vt_s(:,:) + rhoi * vt_i(:,:) ) |
---|
[8586] | 429 | snwice_mass_b(:,:) = snwice_mass(:,:) |
---|
| 430 | ENDIF |
---|
| 431 | ! |
---|
| 432 | ELSEIF( TRIM(cdrw) == 'WRITE' ) THEN ! Create restart file |
---|
| 433 | ! ! ------------------- |
---|
| 434 | IF(lwp) WRITE(numout,*) '---- update-rst ----' |
---|
| 435 | iter = kt + nn_fsbc - 1 ! ice restarts are written at kt == nitrst - nn_fsbc + 1 |
---|
| 436 | ! |
---|
| 437 | CALL iom_rstput( iter, nitrst, numriw, 'snwice_mass' , snwice_mass ) |
---|
| 438 | CALL iom_rstput( iter, nitrst, numriw, 'snwice_mass_b', snwice_mass_b ) |
---|
| 439 | ! |
---|
| 440 | ENDIF |
---|
| 441 | ! |
---|
| 442 | END SUBROUTINE update_rst |
---|
| 443 | |
---|
| 444 | #else |
---|
| 445 | !!---------------------------------------------------------------------- |
---|
[9570] | 446 | !! Default option Dummy module NO SI3 sea-ice model |
---|
[8586] | 447 | !!---------------------------------------------------------------------- |
---|
| 448 | #endif |
---|
| 449 | |
---|
| 450 | !!====================================================================== |
---|
| 451 | END MODULE iceupdate |
---|