Changeset 6416 for trunk/NEMOGCM/NEMO/OPA_SRC/SBC
- Timestamp:
- 2016-04-01T14:22:17+02:00 (8 years ago)
- Location:
- trunk/NEMOGCM/NEMO/OPA_SRC/SBC
- Files:
-
- 6 edited
-
albedo.F90 (modified) (7 diffs)
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sbc_ice.F90 (modified) (2 diffs)
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sbcblk_clio.F90 (modified) (1 diff)
-
sbcblk_core.F90 (modified) (2 diffs)
-
sbccpl.F90 (modified) (9 diffs)
-
sbcice_lim.F90 (modified) (5 diffs)
Legend:
- Unmodified
- Added
- Removed
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trunk/NEMOGCM/NEMO/OPA_SRC/SBC/albedo.F90
r4624 r6416 9 9 !! - ! 2001-06 (M. Vancoppenolle) LIM 3.0 10 10 !! - ! 2006-08 (G. Madec) cleaning for surface module 11 !! 3.6 ! 2016-01 (C. Rousset) new parameterization for sea ice albedo 11 12 !!---------------------------------------------------------------------- 12 13 … … 29 30 30 31 INTEGER :: albd_init = 0 !: control flag for initialization 31 REAL(wp) :: zzero = 0.e0 ! constant values32 REAL(wp) :: zone = 1.e0 ! " "33 34 REAL(wp) :: c1 = 0.05 ! constants values35 REAL(wp) :: c2 = 0.10 !" "36 REAL(wp) :: r mue = 0.40 ! cosine of local solar altitude37 32 33 REAL(wp) :: rmue = 0.40 ! cosine of local solar altitude 34 REAL(wp) :: ralb_oce = 0.066 ! ocean or lead albedo (Pegau and Paulson, Ann. Glac. 2001) 35 REAL(wp) :: c1 = 0.05 ! snow thickness (only for nn_ice_alb=0) 36 REAL(wp) :: c2 = 0.10 ! " " 37 REAL(wp) :: rcloud = 0.06 ! cloud effect on albedo (only-for nn_ice_alb=0) 38 38 39 ! !!* namelist namsbc_alb 39 REAL(wp) :: rn_cloud ! cloudiness effect on snow or ice albedo (Grenfell & Perovich, 1984) 40 #if defined key_lim3 41 REAL(wp) :: rn_albice ! albedo of melting ice in the arctic and antarctic (Shine & Hendersson-Sellers) 42 #else 43 REAL(wp) :: rn_albice ! albedo of melting ice in the arctic and antarctic (Shine & Hendersson-Sellers) 44 #endif 45 REAL(wp) :: rn_alphd ! coefficients for linear interpolation used to compute 46 REAL(wp) :: rn_alphdi ! albedo between two extremes values (Pyane, 1972) 47 REAL(wp) :: rn_alphc ! 40 INTEGER :: nn_ice_alb 41 REAL(wp) :: rn_albice 48 42 49 43 !!---------------------------------------------------------------------- … … 59 53 !! 60 54 !! ** Purpose : Computation of the albedo of the snow/ice system 61 !! as well as the ocean one62 55 !! 63 !! ** Method : - Computation of the albedo of snow or ice (choose the 64 !! rignt one by a large number of tests 65 !! - Computation of the albedo of the ocean 66 !! 67 !! References : Shine and Hendersson-Sellers 1985, JGR, 90(D1), 2243-2250. 56 !! ** Method : Two schemes are available (from namelist parameter nn_ice_alb) 57 !! 0: the scheme is that of Shine & Henderson-Sellers (JGR 1985) for clear-skies 58 !! 1: the scheme is "home made" (for cloudy skies) and based on Brandt et al. (J. Climate 2005) 59 !! and Grenfell & Perovich (JGR 2004) 60 !! Description of scheme 1: 61 !! 1) Albedo dependency on ice thickness follows the findings from Brandt et al (2005) 62 !! which are an update of Allison et al. (JGR 1993) ; Brandt et al. 1999 63 !! 0-5cm : linear function of ice thickness 64 !! 5-150cm: log function of ice thickness 65 !! > 150cm: constant 66 !! 2) Albedo dependency on snow thickness follows the findings from Grenfell & Perovich (2004) 67 !! i.e. it increases as -EXP(-snw_thick/0.02) during freezing and -EXP(-snw_thick/0.03) during melting 68 !! 3) Albedo dependency on clouds is speculated from measurements of Grenfell and Perovich (2004) 69 !! i.e. cloudy-clear albedo depend on cloudy albedo following a 2d order polynomial law 70 !! 4) The needed 4 parameters are: dry and melting snow, freezing ice and bare puddled ice 71 !! 72 !! ** Note : The parameterization from Shine & Henderson-Sellers presents several misconstructions: 73 !! 1) ice albedo when ice thick. tends to 0 is different than ocean albedo 74 !! 2) for small ice thick. covered with some snow (<3cm?), albedo is larger 75 !! under melting conditions than under freezing conditions 76 !! 3) the evolution of ice albedo as a function of ice thickness shows 77 !! 3 sharp inflexion points (at 5cm, 100cm and 150cm) that look highly unrealistic 78 !! 79 !! References : Shine & Henderson-Sellers 1985, JGR, 90(D1), 2243-2250. 80 !! Brandt et al. 2005, J. Climate, vol 18 81 !! Grenfell & Perovich 2004, JGR, vol 109 68 82 !!---------------------------------------------------------------------- 69 83 REAL(wp), INTENT(in ), DIMENSION(:,:,:) :: pt_ice ! ice surface temperature (Kelvin) … … 73 87 REAL(wp), INTENT( out), DIMENSION(:,:,:) :: pa_ice_os ! albedo of ice under overcast sky 74 88 !! 75 INTEGER :: ji, jj, jl ! dummy loop indices 76 INTEGER :: ijpl ! number of ice categories (3rd dim of ice input arrays) 77 REAL(wp) :: zalbpsnm ! albedo of ice under clear sky when snow is melting 78 REAL(wp) :: zalbpsnf ! albedo of ice under clear sky when snow is freezing 79 REAL(wp) :: zalbpsn ! albedo of snow/ice system when ice is coverd by snow 80 REAL(wp) :: zalbpic ! albedo of snow/ice system when ice is free of snow 81 REAL(wp) :: zithsn ! = 1 for hsn >= 0 ( ice is cov. by snow ) ; = 0 otherwise (ice is free of snow) 82 REAL(wp) :: zitmlsn ! = 1 freezinz snow (pt_ice >=rt0_snow) ; = 0 melting snow (pt_ice<rt0_snow) 83 REAL(wp) :: zihsc1 ! = 1 hsn <= c1 ; = 0 hsn > c1 84 REAL(wp) :: zihsc2 ! = 1 hsn >= c2 ; = 0 hsn < c2 85 !! 86 REAL(wp), POINTER, DIMENSION(:,:,:) :: zalbfz ! = rn_alphdi for freezing ice ; = rn_albice for melting ice 87 REAL(wp), POINTER, DIMENSION(:,:,:) :: zficeth ! function of ice thickness 89 INTEGER :: ji, jj, jl ! dummy loop indices 90 INTEGER :: ijpl ! number of ice categories (3rd dim of ice input arrays) 91 REAL(wp) :: ralb_im, ralb_sf, ralb_sm, ralb_if 92 REAL(wp) :: zswitch, z1_c1, z1_c2 93 REAL(wp) :: zalb_sm, zalb_sf, zalb_st ! albedo of snow melting, freezing, total 94 REAL(wp), POINTER, DIMENSION(:,:,:) :: zalb, zalb_it ! intermediate variable & albedo of ice (snow free) 88 95 !!--------------------------------------------------------------------- 89 96 90 97 ijpl = SIZE( pt_ice, 3 ) ! number of ice categories 91 92 CALL wrk_alloc( jpi,jpj,ijpl, zalb fz, zficeth)98 99 CALL wrk_alloc( jpi,jpj,ijpl, zalb, zalb_it ) 93 100 94 101 IF( albd_init == 0 ) CALL albedo_init ! initialization 95 102 96 !--------------------------- 97 ! Computation of zficeth 98 !--------------------------- 99 ! ice free of snow and melts 100 WHERE ( ph_snw == 0._wp .AND. pt_ice >= rt0_ice ) ; zalbfz(:,:,:) = rn_albice 101 ELSE WHERE ; zalbfz(:,:,:) = rn_alphdi 102 END WHERE 103 104 WHERE ( 1.5 < ph_ice ) ; zficeth = zalbfz 105 ELSE WHERE( 1.0 < ph_ice .AND. ph_ice <= 1.5 ) ; zficeth = 0.472 + 2.0 * ( zalbfz - 0.472 ) * ( ph_ice - 1.0 ) 106 ELSE WHERE( 0.05 < ph_ice .AND. ph_ice <= 1.0 ) ; zficeth = 0.2467 + 0.7049 * ph_ice & 107 & - 0.8608 * ph_ice * ph_ice & 108 & + 0.3812 * ph_ice * ph_ice * ph_ice 109 ELSE WHERE ; zficeth = 0.1 + 3.6 * ph_ice 110 END WHERE 111 112 !!gm old code 113 ! DO jl = 1, ijpl 114 ! DO jj = 1, jpj 115 ! DO ji = 1, jpi 116 ! IF( ph_ice(ji,jj,jl) > 1.5 ) THEN 117 ! zficeth(ji,jj,jl) = zalbfz(ji,jj,jl) 118 ! ELSEIF( ph_ice(ji,jj,jl) > 1.0 .AND. ph_ice(ji,jj,jl) <= 1.5 ) THEN 119 ! zficeth(ji,jj,jl) = 0.472 + 2.0 * ( zalbfz(ji,jj,jl) - 0.472 ) * ( ph_ice(ji,jj,jl) - 1.0 ) 120 ! ELSEIF( ph_ice(ji,jj,jl) > 0.05 .AND. ph_ice(ji,jj,jl) <= 1.0 ) THEN 121 ! zficeth(ji,jj,jl) = 0.2467 + 0.7049 * ph_ice(ji,jj,jl) & 122 ! & - 0.8608 * ph_ice(ji,jj,jl) * ph_ice(ji,jj,jl) & 123 ! & + 0.3812 * ph_ice(ji,jj,jl) * ph_ice(ji,jj,jl) * ph_ice (ji,jj,jl) 124 ! ELSE 125 ! zficeth(ji,jj,jl) = 0.1 + 3.6 * ph_ice(ji,jj,jl) 126 ! ENDIF 127 ! END DO 128 ! END DO 129 ! END DO 130 !!gm end old code 131 132 !----------------------------------------------- 133 ! Computation of the snow/ice albedo system 134 !-------------------------- --------------------- 135 136 ! Albedo of snow-ice for clear sky. 137 !----------------------------------------------- 138 DO jl = 1, ijpl 139 DO jj = 1, jpj 140 DO ji = 1, jpi 141 ! Case of ice covered by snow. 142 ! ! freezing snow 143 zihsc1 = 1.0 - MAX( zzero , SIGN( zone , - ( ph_snw(ji,jj,jl) - c1 ) ) ) 144 zalbpsnf = ( 1.0 - zihsc1 ) * ( zficeth(ji,jj,jl) & 145 & + ph_snw(ji,jj,jl) * ( rn_alphd - zficeth(ji,jj,jl) ) / c1 ) & 146 & + zihsc1 * rn_alphd 147 ! ! melting snow 148 zihsc2 = MAX( zzero , SIGN( zone , ph_snw(ji,jj,jl) - c2 ) ) 149 zalbpsnm = ( 1.0 - zihsc2 ) * ( rn_albice + ph_snw(ji,jj,jl) * ( rn_alphc - rn_albice ) / c2 ) & 150 & + zihsc2 * rn_alphc 151 ! 152 zitmlsn = MAX( zzero , SIGN( zone , pt_ice(ji,jj,jl) - rt0_snow ) ) 153 zalbpsn = zitmlsn * zalbpsnm + ( 1.0 - zitmlsn ) * zalbpsnf 154 155 ! Case of ice free of snow. 156 zalbpic = zficeth(ji,jj,jl) 157 158 ! albedo of the system 159 zithsn = 1.0 - MAX( zzero , SIGN( zone , - ph_snw(ji,jj,jl) ) ) 160 pa_ice_cs(ji,jj,jl) = zithsn * zalbpsn + ( 1.0 - zithsn ) * zalbpic 103 104 SELECT CASE ( nn_ice_alb ) 105 106 !------------------------------------------ 107 ! Shine and Henderson-Sellers (1985) 108 !------------------------------------------ 109 CASE( 0 ) 110 111 ralb_sf = 0.80 ! dry snow 112 ralb_sm = 0.65 ! melting snow 113 ralb_if = 0.72 ! bare frozen ice 114 ralb_im = rn_albice ! bare puddled ice 115 116 ! Computation of ice albedo (free of snow) 117 WHERE ( ph_snw == 0._wp .AND. pt_ice >= rt0_ice ) ; zalb(:,:,:) = ralb_im 118 ELSE WHERE ; zalb(:,:,:) = ralb_if 119 END WHERE 120 121 WHERE ( 1.5 < ph_ice ) ; zalb_it = zalb 122 ELSE WHERE( 1.0 < ph_ice .AND. ph_ice <= 1.5 ) ; zalb_it = 0.472 + 2.0 * ( zalb - 0.472 ) * ( ph_ice - 1.0 ) 123 ELSE WHERE( 0.05 < ph_ice .AND. ph_ice <= 1.0 ) ; zalb_it = 0.2467 + 0.7049 * ph_ice & 124 & - 0.8608 * ph_ice * ph_ice & 125 & + 0.3812 * ph_ice * ph_ice * ph_ice 126 ELSE WHERE ; zalb_it = 0.1 + 3.6 * ph_ice 127 END WHERE 128 129 DO jl = 1, ijpl 130 DO jj = 1, jpj 131 DO ji = 1, jpi 132 ! freezing snow 133 ! no effect of underlying ice layer IF snow thickness > c1. Albedo does not depend on snow thick if > c2 134 ! ! freezing snow 135 zswitch = 1._wp - MAX( 0._wp , SIGN( 1._wp , - ( ph_snw(ji,jj,jl) - c1 ) ) ) 136 zalb_sf = ( 1._wp - zswitch ) * ( zalb_it(ji,jj,jl) & 137 & + ph_snw(ji,jj,jl) * ( ralb_sf - zalb_it(ji,jj,jl) ) / c1 ) & 138 & + zswitch * ralb_sf 139 140 ! melting snow 141 ! no effect of underlying ice layer. Albedo does not depend on snow thick IF > c2 142 zswitch = MAX( 0._wp , SIGN( 1._wp , ph_snw(ji,jj,jl) - c2 ) ) 143 zalb_sm = ( 1._wp - zswitch ) * ( ralb_im + ph_snw(ji,jj,jl) * ( ralb_sm - ralb_im ) / c2 ) & 144 & + zswitch * ralb_sm 145 ! 146 ! snow albedo 147 zswitch = MAX( 0._wp , SIGN( 1._wp , pt_ice(ji,jj,jl) - rt0_snow ) ) 148 zalb_st = zswitch * zalb_sm + ( 1._wp - zswitch ) * zalb_sf 149 150 ! Ice/snow albedo 151 zswitch = 1._wp - MAX( 0._wp , SIGN( 1._wp , - ph_snw(ji,jj,jl) ) ) 152 pa_ice_cs(ji,jj,jl) = zswitch * zalb_st + ( 1._wp - zswitch ) * zalb_it(ji,jj,jl) 153 ! 154 END DO 161 155 END DO 162 156 END DO 163 END DO 164 165 ! Albedo of snow-ice for overcast sky. 166 !---------------------------------------------- 167 pa_ice_os(:,:,:) = pa_ice_cs(:,:,:) + rn_cloud ! Oberhuber correction 168 ! 169 CALL wrk_dealloc( jpi,jpj,ijpl, zalbfz, zficeth ) 157 158 pa_ice_os(:,:,:) = pa_ice_cs(:,:,:) + rcloud ! Oberhuber correction for overcast sky 159 160 !------------------------------------------ 161 ! New parameterization (2016) 162 !------------------------------------------ 163 CASE( 1 ) 164 165 ralb_im = rn_albice ! bare puddled ice 166 ! compilation of values from literature 167 ralb_sf = 0.85 ! dry snow 168 ralb_sm = 0.75 ! melting snow 169 ralb_if = 0.60 ! bare frozen ice 170 ! Perovich et al 2002 (Sheba) => the only dataset for which all types of ice/snow were retrieved 171 ! ralb_sf = 0.85 ! dry snow 172 ! ralb_sm = 0.72 ! melting snow 173 ! ralb_if = 0.65 ! bare frozen ice 174 ! Brandt et al 2005 (East Antarctica) 175 ! ralb_sf = 0.87 ! dry snow 176 ! ralb_sm = 0.82 ! melting snow 177 ! ralb_if = 0.54 ! bare frozen ice 178 ! 179 ! Computation of ice albedo (free of snow) 180 z1_c1 = 1. / ( LOG(1.5) - LOG(0.05) ) 181 z1_c2 = 1. / 0.05 182 WHERE ( ph_snw == 0._wp .AND. pt_ice >= rt0_ice ) ; zalb = ralb_im 183 ELSE WHERE ; zalb = ralb_if 184 END WHERE 185 186 WHERE ( 1.5 < ph_ice ) ; zalb_it = zalb 187 ELSE WHERE( 0.05 < ph_ice .AND. ph_ice <= 1.5 ) ; zalb_it = zalb + ( 0.18 - zalb ) * z1_c1 * & 188 & ( LOG(1.5) - LOG(ph_ice) ) 189 ELSE WHERE ; zalb_it = ralb_oce + ( 0.18 - ralb_oce ) * z1_c2 * ph_ice 190 END WHERE 191 192 z1_c1 = 1. / 0.02 193 z1_c2 = 1. / 0.03 194 ! Computation of the snow/ice albedo 195 DO jl = 1, ijpl 196 DO jj = 1, jpj 197 DO ji = 1, jpi 198 zalb_sf = ralb_sf - ( ralb_sf - zalb_it(ji,jj,jl)) * EXP( - ph_snw(ji,jj,jl) * z1_c1 ); 199 zalb_sm = ralb_sm - ( ralb_sm - zalb_it(ji,jj,jl)) * EXP( - ph_snw(ji,jj,jl) * z1_c2 ); 200 201 ! snow albedo 202 zswitch = MAX( 0._wp , SIGN( 1._wp , pt_ice(ji,jj,jl) - rt0_snow ) ) 203 zalb_st = zswitch * zalb_sm + ( 1._wp - zswitch ) * zalb_sf 204 205 ! Ice/snow albedo 206 zswitch = MAX( 0._wp , SIGN( 1._wp , - ph_snw(ji,jj,jl) ) ) 207 pa_ice_os(ji,jj,jl) = ( 1._wp - zswitch ) * zalb_st + zswitch * zalb_it(ji,jj,jl) 208 209 END DO 210 END DO 211 END DO 212 ! Effect of the clouds (2d order polynomial) 213 pa_ice_cs = pa_ice_os - ( - 0.1010 * pa_ice_os * pa_ice_os + 0.1933 * pa_ice_os - 0.0148 ); 214 215 END SELECT 216 217 CALL wrk_dealloc( jpi,jpj,ijpl, zalb, zalb_it ) 170 218 ! 171 219 END SUBROUTINE albedo_ice … … 181 229 REAL(wp), DIMENSION(:,:), INTENT(out) :: pa_oce_cs ! albedo of ocean under clear sky 182 230 !! 183 REAL(wp) :: zcoef ! local scalar184 !!---------------------------------------------------------------------- 185 ! 186 zcoef = 0.05 / ( 1.1 * rmue**1.4 + 0.15 ) ! Parameterization of Briegled and Ramanathan, 1982187 pa_oce_cs(:,:) = zcoef 188 pa_oce_os(:,:) = 0.06! Parameterization of Kondratyev, 1969 and Payne, 1972231 REAL(wp) :: zcoef 232 !!---------------------------------------------------------------------- 233 ! 234 zcoef = 0.05 / ( 1.1 * rmue**1.4 + 0.15 ) ! Parameterization of Briegled and Ramanathan, 1982 235 pa_oce_cs(:,:) = zcoef 236 pa_oce_os(:,:) = 0.06 ! Parameterization of Kondratyev, 1969 and Payne, 1972 189 237 ! 190 238 END SUBROUTINE albedo_oce … … 200 248 !!---------------------------------------------------------------------- 201 249 INTEGER :: ios ! Local integer output status for namelist read 202 NAMELIST/namsbc_alb/ rn_cloud, rn_albice, rn_alphd, rn_alphdi, rn_alphc250 NAMELIST/namsbc_alb/ nn_ice_alb, rn_albice 203 251 !!---------------------------------------------------------------------- 204 252 ! … … 219 267 WRITE(numout,*) '~~~~~~~' 220 268 WRITE(numout,*) ' Namelist namsbc_alb : albedo ' 221 WRITE(numout,*) ' correction for snow and ice albedo rn_cloud = ', rn_cloud 222 WRITE(numout,*) ' albedo of melting ice in the arctic and antarctic rn_albice = ', rn_albice 223 WRITE(numout,*) ' coefficients for linear rn_alphd = ', rn_alphd 224 WRITE(numout,*) ' interpolation used to compute albedo rn_alphdi = ', rn_alphdi 225 WRITE(numout,*) ' between two extremes values (Pyane, 1972) rn_alphc = ', rn_alphc 269 WRITE(numout,*) ' choose the albedo parameterization nn_ice_alb = ', nn_ice_alb 270 WRITE(numout,*) ' albedo of bare puddled ice rn_albice = ', rn_albice 226 271 ENDIF 227 272 ! -
trunk/NEMOGCM/NEMO/OPA_SRC/SBC/sbc_ice.F90
r5407 r6416 80 80 REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qemp_oce !: heat flux of precip and evap over ocean [W/m2] 81 81 REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qemp_ice !: heat flux of precip and evap over ice [W/m2] 82 REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qprec_ice !: heat flux of precip over ice [J/m3] 82 REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: qevap_ice !: heat flux of evap over ice [W/m2] 83 REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qprec_ice !: enthalpy of precip over ice [J/m3] 83 84 REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: emp_oce !: evap - precip over ocean [kg/m2/s] 84 85 #endif … … 144 145 #endif 145 146 #if defined key_lim3 146 & evap_ice(jpi,jpj,jpl) , devap_ice(jpi,jpj,jpl) , qprec_ice(jpi,jpj) , &147 & qemp_ice(jpi,jpj) , qe mp_oce(jpi,jpj) ,&148 & qns_oce (jpi,jpj) , qsr_oce (jpi,jpj) , emp_oce (jpi,jpj) ,&147 & evap_ice(jpi,jpj,jpl) , devap_ice(jpi,jpj,jpl) , qprec_ice(jpi,jpj) , & 148 & qemp_ice(jpi,jpj) , qevap_ice(jpi,jpj,jpl) , qemp_oce (jpi,jpj) , & 149 & qns_oce (jpi,jpj) , qsr_oce (jpi,jpj) , emp_oce (jpi,jpj) , & 149 150 #endif 150 151 & emp_ice(jpi,jpj) , STAT= ierr(1) ) -
trunk/NEMOGCM/NEMO/OPA_SRC/SBC/sbcblk_clio.F90
r5836 r6416 668 668 qprec_ice(:,:) = rhosn * ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus ) 669 669 670 ! --- heat content of evap over ice in W/m2 (to be used in 1D-thermo) --- ! 671 DO jl = 1, jpl 672 qevap_ice(:,:,jl) = 0._wp ! should be -evap_ice(:,:,jl)*( ( Tice - rt0 ) * cpic * tmask(:,:,1) - lfus ) 673 ! but then qemp_ice should also include sublimation 674 END DO 675 670 676 CALL wrk_dealloc( jpi,jpj, zevap, zsnw ) 671 677 #endif -
trunk/NEMOGCM/NEMO/OPA_SRC/SBC/sbcblk_core.F90
r6140 r6416 612 612 ! --- evaporation --- ! 613 613 z1_lsub = 1._wp / Lsub 614 evap_ice (:,:,:) = qla_ice (:,:,:) * z1_lsub! sublimation615 devap_ice(:,:,:) = dqla_ice(:,:,:) * z1_lsub616 zevap (:,:) = emp(:,:) + tprecip(:,:)! evaporation over ocean614 evap_ice (:,:,:) = rn_efac * qla_ice (:,:,:) * z1_lsub ! sublimation 615 devap_ice(:,:,:) = rn_efac * dqla_ice(:,:,:) * z1_lsub ! d(sublimation)/dT 616 zevap (:,:) = rn_efac * ( emp(:,:) + tprecip(:,:) ) ! evaporation over ocean 617 617 618 618 ! --- evaporation minus precipitation --- ! … … 637 637 ! --- heat content of precip over ice in J/m3 (to be used in 1D-thermo) --- ! 638 638 qprec_ice(:,:) = rhosn * ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus ) 639 640 ! --- heat content of evap over ice in W/m2 (to be used in 1D-thermo) --- ! 641 DO jl = 1, jpl 642 qevap_ice(:,:,jl) = 0._wp ! should be -evap_ice(:,:,jl)*( ( Tice - rt0 ) * cpic * tmask(:,:,1) ) 643 ! But we do not have Tice => consider it at 0°C => evap=0 644 END DO 639 645 640 646 CALL wrk_dealloc( jpi,jpj, zevap, zsnw ) -
trunk/NEMOGCM/NEMO/OPA_SRC/SBC/sbccpl.F90
r6165 r6416 1370 1370 ! 1371 1371 INTEGER :: jl ! dummy loop index 1372 REAL(wp), POINTER, DIMENSION(:,: ) :: zcptn, ztmp, zicefr, zmsk 1373 REAL(wp), POINTER, DIMENSION(:,: ) :: zemp_tot, zemp_ice, z sprecip, ztprecip, zqns_tot, zqsr_tot1374 REAL(wp), POINTER, DIMENSION(:,: ,:) :: zqns_ice, zqsr_ice, zdqns_ice1375 REAL(wp), POINTER, DIMENSION(:,: ) :: zevap, zsnw, zqns_oce, zqsr_oce, zqprec_ice, zqemp_oce ! for LIM31372 REAL(wp), POINTER, DIMENSION(:,: ) :: zcptn, ztmp, zicefr, zmsk, zsnw 1373 REAL(wp), POINTER, DIMENSION(:,: ) :: zemp_tot, zemp_ice, zemp_oce, ztprecip, zsprecip, zevap, zevap_ice, zdevap_ice 1374 REAL(wp), POINTER, DIMENSION(:,: ) :: zqns_tot, zqns_oce, zqsr_tot, zqsr_oce, zqprec_ice, zqemp_oce, zqemp_ice 1375 REAL(wp), POINTER, DIMENSION(:,:,:) :: zqns_ice, zqsr_ice, zdqns_ice, zqevap_ice 1376 1376 !!---------------------------------------------------------------------- 1377 1377 ! 1378 1378 IF( nn_timing == 1 ) CALL timing_start('sbc_cpl_ice_flx') 1379 1379 ! 1380 CALL wrk_alloc( jpi,jpj, zcptn, ztmp, zicefr, zmsk, zemp_tot, zemp_ice, zsprecip, ztprecip, zqns_tot, zqsr_tot ) 1381 CALL wrk_alloc( jpi,jpj,jpl, zqns_ice, zqsr_ice, zdqns_ice ) 1380 CALL wrk_alloc( jpi,jpj, zcptn, ztmp, zicefr, zmsk, zsnw ) 1381 CALL wrk_alloc( jpi,jpj, zemp_tot, zemp_ice, zemp_oce, ztprecip, zsprecip, zevap, zevap_ice, zdevap_ice ) 1382 CALL wrk_alloc( jpi,jpj, zqns_tot, zqns_oce, zqsr_tot, zqsr_oce, zqprec_ice, zqemp_oce, zqemp_ice ) 1383 CALL wrk_alloc( jpi,jpj,jpl, zqns_ice, zqsr_ice, zdqns_ice, zqevap_ice ) 1382 1384 1383 1385 IF( ln_mixcpl ) zmsk(:,:) = 1. - xcplmask(:,:,0) … … 1414 1416 ztprecip(:,:) = frcv(jpr_semp)%z3(:,:,1) - frcv(jpr_sbpr)%z3(:,:,1) + zsprecip(:,:) 1415 1417 END SELECT 1416 1417 IF( iom_use('subl_ai_cea') ) & 1418 CALL iom_put( 'subl_ai_cea', frcv(jpr_ievp)%z3(:,:,1) * zicefr(:,:) ) ! Sublimation over sea-ice (cell average) 1419 ! 1420 ! ! runoffs and calving (put in emp_tot) 1418 #if defined key_lim3 1419 ! zsnw = snow percentage over ice after wind blowing 1420 zsnw(:,:) = 0._wp 1421 CALL lim_thd_snwblow( p_frld, zsnw ) 1422 1423 ! --- evaporation (kg/m2/s) --- ! 1424 zevap_ice(:,:) = frcv(jpr_ievp)%z3(:,:,1) 1425 ! since the sensitivity of evap to temperature (devap/dT) is not prescribed by the atmosphere, we set it to 0 1426 ! therefore, sublimation is not redistributed over the ice categories in case no subgrid scale fluxes are provided by atm. 1427 zdevap_ice(:,:) = 0._wp 1428 1429 ! --- evaporation minus precipitation corrected for the effect of wind blowing on snow --- ! 1430 zemp_oce(:,:) = zemp_tot(:,:) - zemp_ice(:,:) - zsprecip * (1._wp - zsnw) 1431 zemp_ice(:,:) = zemp_ice(:,:) + zsprecip * (1._wp - zsnw) 1432 1433 ! Sublimation over sea-ice (cell average) 1434 IF( iom_use('subl_ai_cea') ) CALL iom_put( 'subl_ai_cea', zevap_ice(:,:) * zicefr(:,:) ) 1435 ! runoffs and calving (put in emp_tot) 1436 IF( srcv(jpr_rnf)%laction ) rnf(:,:) = frcv(jpr_rnf)%z3(:,:,1) 1437 IF( srcv(jpr_cal)%laction ) THEN 1438 zemp_tot(:,:) = zemp_tot(:,:) - frcv(jpr_cal)%z3(:,:,1) 1439 CALL iom_put( 'calving_cea', frcv(jpr_cal)%z3(:,:,1) ) 1440 ENDIF 1441 1442 IF( ln_mixcpl ) THEN 1443 emp_tot(:,:) = emp_tot(:,:) * xcplmask(:,:,0) + zemp_tot(:,:) * zmsk(:,:) 1444 emp_ice(:,:) = emp_ice(:,:) * xcplmask(:,:,0) + zemp_ice(:,:) * zmsk(:,:) 1445 emp_oce(:,:) = emp_oce(:,:) * xcplmask(:,:,0) + zemp_oce(:,:) * zmsk(:,:) 1446 sprecip(:,:) = sprecip(:,:) * xcplmask(:,:,0) + zsprecip(:,:) * zmsk(:,:) 1447 tprecip(:,:) = tprecip(:,:) * xcplmask(:,:,0) + ztprecip(:,:) * zmsk(:,:) 1448 DO jl=1,jpl 1449 evap_ice (:,:,jl) = evap_ice (:,:,jl) * xcplmask(:,:,0) + zevap_ice (:,:) * zmsk(:,:) 1450 devap_ice(:,:,jl) = devap_ice(:,:,jl) * xcplmask(:,:,0) + zdevap_ice(:,:) * zmsk(:,:) 1451 ENDDO 1452 ELSE 1453 emp_tot(:,:) = zemp_tot(:,:) 1454 emp_ice(:,:) = zemp_ice(:,:) 1455 emp_oce(:,:) = zemp_oce(:,:) 1456 sprecip(:,:) = zsprecip(:,:) 1457 tprecip(:,:) = ztprecip(:,:) 1458 DO jl=1,jpl 1459 evap_ice (:,:,jl) = zevap_ice (:,:) 1460 devap_ice(:,:,jl) = zdevap_ice(:,:) 1461 ENDDO 1462 ENDIF 1463 1464 CALL iom_put( 'snowpre' , sprecip ) ! Snow 1465 IF( iom_use('snow_ao_cea') ) CALL iom_put( 'snow_ao_cea', sprecip(:,:) * ( 1._wp - zsnw ) ) ! Snow over ice-free ocean (cell average) 1466 IF( iom_use('snow_ai_cea') ) CALL iom_put( 'snow_ai_cea', sprecip(:,:) * zsnw ) ! Snow over sea-ice (cell average) 1467 #else 1468 ! Sublimation over sea-ice (cell average) 1469 IF( iom_use('subl_ai_cea') ) CALL iom_put( 'subl_ai_cea', frcv(jpr_ievp)%z3(:,:,1) * zicefr(:,:) ) 1470 ! runoffs and calving (put in emp_tot) 1421 1471 IF( srcv(jpr_rnf)%laction ) rnf(:,:) = frcv(jpr_rnf)%z3(:,:,1) 1422 1472 IF( srcv(jpr_cal)%laction ) THEN … … 1442 1492 IF( iom_use('snow_ai_cea') ) & 1443 1493 CALL iom_put( 'snow_ai_cea', sprecip(:,:) * zicefr(:,:) ) ! Snow over sea-ice (cell average) 1494 #endif 1444 1495 1445 1496 ! ! ========================= ! … … 1497 1548 IF( iom_use('hflx_snow_cea') ) CALL iom_put( 'hflx_snow_cea', ztmp + sprecip(:,:) * zcptn(:,:) ) ! heat flux from snow (cell average) 1498 1549 1499 #if defined key_lim3 1500 CALL wrk_alloc( jpi,jpj, zevap, zsnw, zqns_oce, zqprec_ice, zqemp_oce ) 1501 1550 #if defined key_lim3 1502 1551 ! --- evaporation --- ! 1503 ! clem: evap_ice is set to 0 for LIM3 since we still do not know what to do with sublimation1504 ! the problem is: the atm. imposes both mass evaporation and heat removed from the snow/ice1505 ! but it is incoherent WITH the ice model1506 DO jl=1,jpl1507 evap_ice(:,:,jl) = 0._wp ! should be: frcv(jpr_ievp)%z3(:,:,1)1508 ENDDO1509 1552 zevap(:,:) = zemp_tot(:,:) + ztprecip(:,:) ! evaporation over ocean 1510 1511 ! --- evaporation minus precipitation --- !1512 emp_oce(:,:) = emp_tot(:,:) - emp_ice(:,:)1513 1553 1514 1554 ! --- non solar flux over ocean --- ! … … 1517 1557 WHERE( p_frld /= 0._wp ) zqns_oce(:,:) = ( zqns_tot(:,:) - SUM( a_i * zqns_ice, dim=3 ) ) / p_frld(:,:) 1518 1558 1519 ! --- heat flux associated with emp --- ! 1520 zsnw(:,:) = 0._wp 1521 CALL lim_thd_snwblow( p_frld, zsnw ) ! snow distribution over ice after wind blowing 1559 ! --- heat flux associated with emp (W/m2) --- ! 1522 1560 zqemp_oce(:,:) = - zevap(:,:) * p_frld(:,:) * zcptn(:,:) & ! evap 1523 1561 & + ( ztprecip(:,:) - zsprecip(:,:) ) * zcptn(:,:) & ! liquid precip 1524 1562 & + zsprecip(:,:) * ( 1._wp - zsnw ) * ( zcptn(:,:) - lfus ) ! solid precip over ocean 1525 qemp_ice(:,:) = - frcv(jpr_ievp)%z3(:,:,1) * zicefr(:,:) * zcptn(:,:) & ! ice evap 1526 & + zsprecip(:,:) * zsnw * ( zcptn(:,:) - lfus ) ! solid precip over ice 1527 1563 ! zqemp_ice(:,:) = - frcv(jpr_ievp)%z3(:,:,1) * zicefr(:,:) * zcptn(:,:) & ! ice evap 1564 ! & + zsprecip(:,:) * zsnw * ( zcptn(:,:) - lfus ) ! solid precip over ice 1565 zqemp_ice(:,:) = zsprecip(:,:) * zsnw * ( zcptn(:,:) - lfus ) ! solid precip over ice (only) 1566 ! qevap_ice=0 since we consider Tice=0°C 1567 1528 1568 ! --- heat content of precip over ice in J/m3 (to be used in 1D-thermo) --- ! 1529 1569 zqprec_ice(:,:) = rhosn * ( zcptn(:,:) - lfus ) 1530 1570 1531 ! --- total non solar flux --- ! 1532 zqns_tot(:,:) = zqns_tot(:,:) + qemp_ice(:,:) + zqemp_oce(:,:) 1571 ! --- heat content of evap over ice in W/m2 (to be used in 1D-thermo) --- ! 1572 DO jl = 1, jpl 1573 zqevap_ice(:,:,jl) = 0._wp ! should be -evap * ( ( Tice - rt0 ) * cpic ) but we do not have Tice, so we consider Tice=0°C 1574 END DO 1575 1576 ! --- total non solar flux (including evap/precip) --- ! 1577 zqns_tot(:,:) = zqns_tot(:,:) + zqemp_ice(:,:) + zqemp_oce(:,:) 1533 1578 1534 1579 ! --- in case both coupled/forced are active, we must mix values --- ! … … 1537 1582 qns_oce(:,:) = qns_oce(:,:) * xcplmask(:,:,0) + zqns_oce(:,:)* zmsk(:,:) 1538 1583 DO jl=1,jpl 1539 qns_ice(:,:,jl) = qns_ice(:,:,jl) * xcplmask(:,:,0) + zqns_ice(:,:,jl)* zmsk(:,:) 1584 qns_ice (:,:,jl) = qns_ice (:,:,jl) * xcplmask(:,:,0) + zqns_ice (:,:,jl)* zmsk(:,:) 1585 qevap_ice(:,:,jl) = qevap_ice(:,:,jl) * xcplmask(:,:,0) + zqevap_ice(:,:,jl)* zmsk(:,:) 1540 1586 ENDDO 1541 1587 qprec_ice(:,:) = qprec_ice(:,:) * xcplmask(:,:,0) + zqprec_ice(:,:)* zmsk(:,:) 1542 1588 qemp_oce (:,:) = qemp_oce(:,:) * xcplmask(:,:,0) + zqemp_oce(:,:)* zmsk(:,:) 1543 !!clem evap_ice(:,:) = evap_ice(:,:) * xcplmask(:,:,0)1589 qemp_ice (:,:) = qemp_ice(:,:) * xcplmask(:,:,0) + zqemp_ice(:,:)* zmsk(:,:) 1544 1590 ELSE 1545 1591 qns_tot (:,: ) = zqns_tot (:,: ) 1546 1592 qns_oce (:,: ) = zqns_oce (:,: ) 1547 1593 qns_ice (:,:,:) = zqns_ice (:,:,:) 1548 q prec_ice(:,:) = zqprec_ice(:,:)1549 q emp_oce (:,:) = zqemp_oce (:,:)1550 ENDIF1551 1552 CALL wrk_dealloc( jpi,jpj, zevap, zsnw, zqns_oce, zqprec_ice, zqemp_oce )1594 qevap_ice(:,:,:) = zqevap_ice(:,:,:) 1595 qprec_ice(:,: ) = zqprec_ice(:,: ) 1596 qemp_oce (:,: ) = zqemp_oce (:,: ) 1597 qemp_ice (:,: ) = zqemp_ice (:,: ) 1598 ENDIF 1553 1599 #else 1554 !1555 1600 ! clem: this formulation is certainly wrong... but better than it was before... 1556 1601 zqns_tot(:,:) = zqns_tot(:,:) & ! zqns_tot update over free ocean with: … … 1619 1664 1620 1665 #if defined key_lim3 1621 CALL wrk_alloc( jpi,jpj, zqsr_oce )1622 1666 ! --- solar flux over ocean --- ! 1623 1667 ! note: p_frld cannot be = 0 since we limit the ice concentration to amax … … 1627 1671 IF( ln_mixcpl ) THEN ; qsr_oce(:,:) = qsr_oce(:,:) * xcplmask(:,:,0) + zqsr_oce(:,:)* zmsk(:,:) 1628 1672 ELSE ; qsr_oce(:,:) = zqsr_oce(:,:) ; ENDIF 1629 1630 CALL wrk_dealloc( jpi,jpj, zqsr_oce )1631 1673 #endif 1632 1674 … … 1679 1721 fr2_i0(:,:) = ( 0.82 * ( 1.0 - cldf_ice ) + 0.65 * cldf_ice ) 1680 1722 1681 CALL wrk_dealloc( jpi,jpj, zcptn, ztmp, zicefr, zmsk, zemp_tot, zemp_ice, zsprecip, ztprecip, zqns_tot, zqsr_tot ) 1682 CALL wrk_dealloc( jpi,jpj,jpl, zqns_ice, zqsr_ice, zdqns_ice ) 1723 CALL wrk_dealloc( jpi,jpj, zcptn, ztmp, zicefr, zmsk, zsnw ) 1724 CALL wrk_dealloc( jpi,jpj, zemp_tot, zemp_ice, zemp_oce, ztprecip, zsprecip, zevap, zevap_ice, zdevap_ice ) 1725 CALL wrk_dealloc( jpi,jpj, zqns_tot, zqns_oce, zqsr_tot, zqsr_oce, zqprec_ice, zqemp_oce, zqemp_ice ) 1726 CALL wrk_dealloc( jpi,jpj,jpl, zqns_ice, zqsr_ice, zdqns_ice, zqevap_ice ) 1683 1727 ! 1684 1728 IF( nn_timing == 1 ) CALL timing_stop('sbc_cpl_ice_flx') -
trunk/NEMOGCM/NEMO/OPA_SRC/SBC/sbcice_lim.F90
r6403 r6416 106 106 INTEGER :: jl ! dummy loop index 107 107 REAL(wp), POINTER, DIMENSION(:,:,:) :: zalb_os, zalb_cs ! ice albedo under overcast/clear sky 108 REAL(wp), POINTER, DIMENSION(:,:,:) :: zalb_ice ! mean ice albedo (for coupled)109 108 REAL(wp), POINTER, DIMENSION(:,: ) :: zutau_ice, zvtau_ice 110 109 !!---------------------------------------------------------------------- … … 193 192 ! fr1_i0 , fr2_i0 : 1sr & 2nd fraction of qsr penetration in ice [%] 194 193 !---------------------------------------------------------------------------------------- 195 CALL wrk_alloc( jpi,jpj,jpl, zalb_os, zalb_cs , zalb_ice)194 CALL wrk_alloc( jpi,jpj,jpl, zalb_os, zalb_cs ) 196 195 CALL albedo_ice( t_su, ht_i, ht_s, zalb_cs, zalb_os ) ! cloud-sky and overcast-sky ice albedos 197 196 … … 199 198 CASE( jp_clio ) ! CLIO bulk formulation 200 199 ! In CLIO the cloud fraction is read in the climatology and the all-sky albedo 201 ! ( zalb_ice) is computed within the bulk routine202 CALL blk_ice_clio_flx( t_su, zalb_cs, zalb_os, zalb_ice )203 IF( ln_mixcpl ) CALL sbc_cpl_ice_flx( p_frld=pfrld, palbi= zalb_ice, psst=sst_m, pist=t_su )204 IF( nn_limflx /= 2 ) CALL ice_lim_flx( t_su, zalb_ice, qns_ice, qsr_ice, dqns_ice, evap_ice, devap_ice, nn_limflx )200 ! (alb_ice) is computed within the bulk routine 201 CALL blk_ice_clio_flx( t_su, zalb_cs, zalb_os, alb_ice ) 202 IF( ln_mixcpl ) CALL sbc_cpl_ice_flx( p_frld=pfrld, palbi=alb_ice, psst=sst_m, pist=t_su ) 203 IF( nn_limflx /= 2 ) CALL ice_lim_flx( t_su, alb_ice, qns_ice, qsr_ice, dqns_ice, evap_ice, devap_ice, nn_limflx ) 205 204 CASE( jp_core ) ! CORE bulk formulation 206 205 ! albedo depends on cloud fraction because of non-linear spectral effects 207 zalb_ice(:,:,:) = ( 1. - cldf_ice ) * zalb_cs(:,:,:) + cldf_ice * zalb_os(:,:,:)208 CALL blk_ice_core_flx( t_su, zalb_ice )209 IF( ln_mixcpl ) CALL sbc_cpl_ice_flx( p_frld=pfrld, palbi= zalb_ice, psst=sst_m, pist=t_su )210 IF( nn_limflx /= 2 ) CALL ice_lim_flx( t_su, zalb_ice, qns_ice, qsr_ice, dqns_ice, evap_ice, devap_ice, nn_limflx )206 alb_ice(:,:,:) = ( 1. - cldf_ice ) * zalb_cs(:,:,:) + cldf_ice * zalb_os(:,:,:) 207 CALL blk_ice_core_flx( t_su, alb_ice ) 208 IF( ln_mixcpl ) CALL sbc_cpl_ice_flx( p_frld=pfrld, palbi=alb_ice, psst=sst_m, pist=t_su ) 209 IF( nn_limflx /= 2 ) CALL ice_lim_flx( t_su, alb_ice, qns_ice, qsr_ice, dqns_ice, evap_ice, devap_ice, nn_limflx ) 211 210 CASE ( jp_purecpl ) 212 211 ! albedo depends on cloud fraction because of non-linear spectral effects 213 zalb_ice(:,:,:) = ( 1. - cldf_ice ) * zalb_cs(:,:,:) + cldf_ice * zalb_os(:,:,:) 214 CALL sbc_cpl_ice_flx( p_frld=pfrld, palbi=zalb_ice, psst=sst_m, pist=t_su ) 215 ! clem: evap_ice is forced to 0 in coupled mode for now 216 ! but it needs to be changed (along with modif in limthd_dh) once heat flux from evap will be avail. from atm. models 217 evap_ice (:,:,:) = 0._wp ; devap_ice (:,:,:) = 0._wp 218 IF( nn_limflx == 2 ) CALL ice_lim_flx( t_su, zalb_ice, qns_ice, qsr_ice, dqns_ice, evap_ice, devap_ice, nn_limflx ) 212 alb_ice(:,:,:) = ( 1. - cldf_ice ) * zalb_cs(:,:,:) + cldf_ice * zalb_os(:,:,:) 213 CALL sbc_cpl_ice_flx( p_frld=pfrld, palbi=alb_ice, psst=sst_m, pist=t_su ) 214 IF( nn_limflx == 2 ) CALL ice_lim_flx( t_su, alb_ice, qns_ice, qsr_ice, dqns_ice, evap_ice, devap_ice, nn_limflx ) 219 215 END SELECT 220 CALL wrk_dealloc( jpi,jpj,jpl, zalb_os, zalb_cs , zalb_ice)216 CALL wrk_dealloc( jpi,jpj,jpl, zalb_os, zalb_cs ) 221 217 222 218 !----------------------------! … … 577 573 sfx_bog(:,:) = 0._wp ; sfx_dyn(:,:) = 0._wp 578 574 sfx_bom(:,:) = 0._wp ; sfx_sum(:,:) = 0._wp 579 sfx_res(:,:) = 0._wp 575 sfx_res(:,:) = 0._wp ; sfx_sub(:,:) = 0._wp 580 576 ! 581 577 wfx_snw(:,:) = 0._wp ; wfx_ice(:,:) = 0._wp … … 593 589 hfx_spr(:,:) = 0._wp ; hfx_dif(:,:) = 0._wp 594 590 hfx_err(:,:) = 0._wp ; hfx_err_rem(:,:) = 0._wp 595 hfx_err_dif(:,:) = 0._wp ; 591 hfx_err_dif(:,:) = 0._wp 592 wfx_err_sub(:,:) = 0._wp 596 593 ! 597 594 afx_tot(:,:) = 0._wp ;
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