| 1 | SUBROUTINE ice_phy_ini(kideb,kiut, nlay_s, nlay_i) |
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| 2 | |
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| 3 | ! BIO-LIM1D, 2008 (M. Vancoppenolle) |
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| 4 | ! update 2014, v3.04 |
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| 5 | |
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| 6 | ! This routine initializes ice variables |
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| 7 | |
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| 8 | !------------------------------------------------------------------------------! |
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| 9 | |
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| 10 | INCLUDE 'type.com' |
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| 11 | INCLUDE 'para.com' |
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| 12 | INCLUDE 'const.com' |
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| 13 | INCLUDE 'ice.com' |
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| 14 | INCLUDE 'thermo.com' |
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| 15 | INCLUDE 'bio.com' |
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| 16 | |
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| 17 | CHARACTER(len=10) :: |
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| 18 | & filenc='init.nc' |
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| 19 | |
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| 20 | REAL(4) zini(1) ! forcing field dummy array |
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| 21 | REAL(4) zzi(maxnlay), zti(maxnlay), zsi(maxnlay) ! forcing field dummy array |
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| 22 | REAL(4) zdsi(maxnlay), zno3(maxnlay), zpo4(maxnlay) |
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| 23 | REAL(4) zdaf(maxnlay) |
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| 24 | |
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| 25 | REAL(8), DIMENSION (maxnlay) :: |
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| 26 | & zsh_i0 , !: old ice salt content (ppt.m-2) |
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| 27 | & zsh_i1 !: new ice salt content (ppt.m-2) |
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| 28 | |
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| 29 | REAL(8), DIMENSION (maxnlay) :: |
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| 30 | & zqh_i0 , !: old ice heat content (J.m-2) |
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| 31 | & zqh_i1 !: new ice heat content (J.m-2) |
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| 32 | |
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| 33 | REAL(8), DIMENSION (maxnlay+2) :: |
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| 34 | & zthick0 !: thickness of old layers |
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| 35 | |
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| 36 | REAL(8), DIMENSION (6) :: |
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| 37 | & zp |
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| 38 | |
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| 39 | WRITE(numout,*) ' * ice_phy_ini : ' |
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| 40 | WRITE(numout,*) ' ~~~~~~~~~~~~~~~~' |
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| 41 | WRITE(numout,*) |
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| 42 | |
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| 43 | zeps = 1.0e-10 |
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| 44 | ji = 1 |
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| 45 | |
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| 46 | ! |
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| 47 | !------------------------------------------------------------------------------| |
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| 48 | ! 1) Case of a NETCDF file |
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| 49 | !------------------------------------------------------------------------------| |
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| 50 | ! |
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| 51 | !----------- |
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| 52 | ! Open file |
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| 53 | !----------- |
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| 54 | CALL CF_OPEN (filenc,id) ! open forcing file |
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| 55 | |
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| 56 | !----------- |
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| 57 | ! Read data |
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| 58 | !----------- |
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| 59 | zn = 0.0 |
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| 60 | CALL CF_READ1D ( filenc, 'nlay', 1, 1, zini ) |
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| 61 | zn = REAL(zini(1)) |
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| 62 | |
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| 63 | zj_d = 0.0 |
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| 64 | CALL CF_READ1D ( filenc, 'j_d', 1, 1, zini ) |
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| 65 | zj_d = REAL(zini(1)) |
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| 66 | |
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| 67 | CALL CF_READ1D ( filenc, 'h_s', 1, 1, zini) |
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| 68 | ht_s_b(ji) = REAL(zini(1)) |
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| 69 | |
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| 70 | |
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| 71 | CALL CF_READ1D ( filenc, 'h_i', 1, 1, zini) |
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| 72 | ht_i_b(ji) = REAL(zini(1)) |
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| 73 | |
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| 74 | CALL CF_READ1D ( filenc, 't_s', 1, 1, zini) |
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| 75 | t_s_b(ji,1) = REAL(zini(1)) |
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| 76 | |
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| 77 | CALL CF_READ1D ( filenc, 't_su', 1, 1, zini) |
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| 78 | t_su_b(ji) = REAL(zini(1)) |
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| 79 | |
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| 80 | DO layer = 1, INT(zn) |
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| 81 | CALL CF_READ1D ( filenc, 'z_i', layer, 1, zini) |
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| 82 | zzi(layer) = zini(1) |
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| 83 | CALL CF_READ1D ( filenc, 't_i', layer, 1, zini) |
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| 84 | zti(layer) = zini(1) |
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| 85 | CALL CF_READ1D ( filenc, 's_i', layer, 1, zini) |
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| 86 | zsi(layer) = zini(1) |
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| 87 | END DO |
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| 88 | |
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| 89 | CALL CF_CLOSE (filenc) ! close nc file |
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| 90 | |
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| 91 | IF ( c_sbr .EQ. 'LIN' ) THEN |
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| 92 | |
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| 93 | t_bo_b(ji) = 273.15-tmut*oce_sal |
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| 94 | |
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| 95 | ENDIF |
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| 96 | |
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| 97 | IF ( c_sbr .EQ. 'NTZ' ) THEN |
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| 98 | |
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| 99 | zp(1) = -0.0210; zp(2) = -0.0015 |
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| 100 | zp(3) = 2.3631d-05; zp(4) = -1.8129d-07 |
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| 101 | zp(5) = 5.8694d-10; zp(6) = -6.7021d-13 |
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| 102 | |
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| 103 | t_bo_b(ji) = 273.15 |
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| 104 | DO ii = 1, 6 |
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| 105 | t_bo_b(ji) = t_bo_b(ji) + zp(ii)*oce_sal**ii |
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| 106 | ENDDO |
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| 107 | |
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| 108 | ENDIF |
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| 109 | |
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| 110 | IF ( c_sbr .EQ. 'WEA' ) THEN |
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| 111 | |
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| 112 | zp(1) = -0.0571; zp(2) = -5.7866e-05 |
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| 113 | zp(3) = -3.0716e-07; zp(4) = 1.4240e-10 |
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| 114 | zp(5) = 2.1844e-12; zp(6) = -1.7638e-14 |
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| 115 | |
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| 116 | t_bo_b(ji) = 273.15 |
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| 117 | DO ii = 1, 6 |
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| 118 | t_bo_b(ji) = t_bo_b(ji) + zp(ii)*oce_sal**ii |
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| 119 | ENDDO |
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| 120 | |
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| 121 | ENDIF |
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| 122 | |
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| 123 | |
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| 124 | !---------------------- |
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| 125 | ! Interpolate profiles |
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| 126 | !---------------------- |
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| 127 | |
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| 128 | !------ |
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| 129 | ! Snow |
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| 130 | !------ |
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| 131 | CALL ice_phy_grid(1,1,nlay_s,ht_s_b(ji), .FALSE., "sno" ) ! compute the physical grid |
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| 132 | |
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| 133 | !----- |
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| 134 | ! Ice |
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| 135 | !----- |
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| 136 | CALL ice_phy_grid(1,1,nlay_i,ht_i_b(ji), .FALSE., "ice" ) ! compute the physical grid |
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| 137 | |
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| 138 | ! grid indexes for redistribution |
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| 139 | ntop0 = 1 |
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| 140 | nbot0 = INT(zn) |
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| 141 | ntop1 = 1 |
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| 142 | nbot1 = nlay_i |
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| 143 | |
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| 144 | !--- Salinity |
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| 145 | zm0(0) = 0.0 ! layer interfaces cotes |
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| 146 | DO layer = 1, nbot0-1 |
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| 147 | zm0(layer) = REAL( zzi(layer) + zzi(layer+1) ) / 2. |
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| 148 | END DO |
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| 149 | zm0(nbot0) = ht_i_b(ji) |
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| 150 | |
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| 151 | DO layer = 1, nbot0 !layer thickness and salt content |
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| 152 | zthick0(layer) = zm0(layer)-zm0(layer-1) |
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| 153 | zsh_i0(layer) = rhog*zthick0(layer)*REAL(zsi(layer)) !mass of salt |
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| 154 | END DO |
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| 155 | |
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| 156 | CALL ice_phy_relay( nbot0 , nbot1 , ntop0 , ntop1 , |
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| 157 | & zthick0, deltaz_i_phy, zsh_i0 , zsh_i1 ) |
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| 158 | |
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| 159 | DO layer = 1, nlay_i |
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| 160 | s_i_b(ji,layer) = zsh_i1(layer) / |
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| 161 | & (rhog*deltaz_i_phy(layer)) |
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| 162 | END DO |
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| 163 | |
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| 164 | DO layer = 1, nbot0 ! heat content |
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| 165 | ztmelts = - tmut * REAL(zsi(layer)) + tpw |
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| 166 | zq = rhog * ( cpg * ( ztmelts -REAL(zti(layer)) ) |
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| 167 | & + lfus*( 1.0 - (ztmelts-tpw) / |
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| 168 | & MIN( (REAL( zti(layer) ) -tpw),-zeps) ) |
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| 169 | & - cpw * ( ztmelts-tpw ) ) |
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| 170 | zqh_i0(layer) = zq * zthick0(layer) |
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| 171 | END DO |
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| 172 | CALL ice_phy_relay( nbot0 , nbot1 , ntop0 , ntop1 , |
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| 173 | & zthick0, deltaz_i_phy, zqh_i0 , zqh_i1 ) |
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| 174 | |
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| 175 | DO layer = 1, nlay_i |
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| 176 | zq = zqh_i1(layer) / MAX( deltaz_i_phy(layer) , zeps ) |
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| 177 | ztmelts = -tmut*s_i_b(ji,layer) + tpw |
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| 178 | aaa = cpg |
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| 179 | bbb = (cpw-cpg)*(ztmelts-tpw) + zq / rhog - lfus |
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| 180 | ccc = lfus * (ztmelts-tpw) |
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| 181 | discrim = SQRT( bbb*bbb - 4.0*aaa*ccc ) |
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| 182 | t_i_b(ji,layer) = tpw + (- bbb - discrim) / ( 2.0*aaa ) |
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| 183 | END DO |
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| 184 | |
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| 185 | ! |
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| 186 | !------------------------------------------------------------------------------| |
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| 187 | ! x) Write in output file |
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| 188 | !------------------------------------------------------------------------------| |
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| 189 | |
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| 190 | WRITE(numout,*) ' --- Initial values --- ' |
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| 191 | WRITE(numout,*) ' ' |
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| 192 | WRITE(numout,*) ' Surface temperature t_su : ', t_su_b(ji) |
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| 193 | WRITE(numout,*) ' Basal temperature t_bo : ', t_bo_b(ji) |
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| 194 | WRITE(numout,*) ' Snow temperature t_s : ', t_s_b(ji,1) |
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| 195 | WRITE(numout,*) ' Ice temperatures t_i : ', |
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| 196 | & ( t_i_b(ji,jk), jk = 1, nlay_i ) |
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| 197 | WRITE(numout,*) ' Ice salinities s_i : ', |
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| 198 | & ( s_i_b(ji,jk), jk = 1, nlay_i ) |
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| 199 | WRITE(numout,*) ' Ice thickness ht_i_b : ', ht_i_b(ji) |
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| 200 | WRITE(numout,*) ' Snow depth ht_s_b : ', ht_s_b(ji) |
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| 201 | WRITE(numout,*) ' ' |
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| 202 | |
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| 203 | !------------------------------------------------------------------------------| |
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| 204 | !- end of ice_phy_ini |
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| 205 | ! |
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| 206 | RETURN |
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| 207 | END |
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