| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/aim_v23/aim_aim2sioce.F,v 1.7 2007/04/04 02:00:36 jmc Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "AIM_OPTIONS.h" |
| 5 |
#ifdef ALLOW_THSICE |
| 6 |
#include "THSICE_OPTIONS.h" |
| 7 |
#endif |
| 8 |
|
| 9 |
CBOP |
| 10 |
C !ROUTINE: AIM_AIM2SIOCE |
| 11 |
C !INTERFACE: |
| 12 |
SUBROUTINE AIM_AIM2SIOCE( |
| 13 |
I land_frc, siceFrac, |
| 14 |
O prcAtm, |
| 15 |
I bi, bj, myTime, myIter, myThid) |
| 16 |
|
| 17 |
C !DESCRIPTION: \bv |
| 18 |
C *==========================================================* |
| 19 |
C | S/R AIM_AIM2SIOCE |
| 20 |
C | o Interface between AIM and thSIce pkg or (coupled) ocean |
| 21 |
C *==========================================================* |
| 22 |
C | o compute surface fluxes over ocean (ice-free + ice covered) |
| 23 |
C | for diagnostics, thsice package and (slab, coupled) ocean |
| 24 |
C *==========================================================* |
| 25 |
C \ev |
| 26 |
|
| 27 |
C !USES: |
| 28 |
IMPLICIT NONE |
| 29 |
|
| 30 |
C == Global variables === |
| 31 |
C-- size for MITgcm & Physics package : |
| 32 |
#include "AIM_SIZE.h" |
| 33 |
|
| 34 |
#include "EEPARAMS.h" |
| 35 |
#include "PARAMS.h" |
| 36 |
#include "FFIELDS.h" |
| 37 |
|
| 38 |
C-- Physics package |
| 39 |
#include "AIM_PARAMS.h" |
| 40 |
#include "com_physcon.h" |
| 41 |
#include "com_physvar.h" |
| 42 |
|
| 43 |
#ifdef ALLOW_THSICE |
| 44 |
#include "THSICE_SIZE.h" |
| 45 |
#include "THSICE_PARAMS.h" |
| 46 |
#include "THSICE_VARS.h" |
| 47 |
#endif |
| 48 |
|
| 49 |
C updated fields (in commom blocks): |
| 50 |
C if using thSIce: |
| 51 |
C Qsw(inp) :: SW radiation through the sea-ice down to the ocean (+=up) |
| 52 |
C Qsw(out) :: SW radiation down to the ocean (ice-free + ice-covered)(+=up) |
| 53 |
C Qnet(out) :: Net heat flux out of the ocean (ice-free ocean only)(+=up) |
| 54 |
C and the Ice-Covered contribution will be added in S/R THSICE_STEP_FWD |
| 55 |
C EmPmR(out) :: Net fresh water flux out off the ocean (ice-free ocean only) |
| 56 |
C and the Ice-Covered contribution will be added in S/R THSICE_STEP_FWD |
| 57 |
C sHeating(in/out) :: air - seaice surface heat flux left to melt the ice |
| 58 |
C snowPrc(out):: snow precip over sea-ice |
| 59 |
C icFrwAtm :: Evaporation over sea-ice [kg/m2/s] (>0 if evaporate) |
| 60 |
C icFlxSW :: net SW heat flux through the ice to the ocean [W/m2] (+=dw) |
| 61 |
C if not using thSIce: |
| 62 |
C Qsw(out) :: SW radiation down to the ocean (ice-free + ice-covered)(+=up) |
| 63 |
C Qnet(out) :: Net heat flux out of the ocean (ice-free + ice-covered)(+=up) |
| 64 |
C EmPmR(out) :: Net fresh water flux out off the ocean (ice-free + ice-covered) |
| 65 |
|
| 66 |
C !INPUT/OUTPUT PARAMETERS: |
| 67 |
C == Routine arguments == |
| 68 |
C land_frc :: land fraction [0-1] |
| 69 |
C siceFrac :: sea-ice fraction (relative to full grid-cell) [0-1] |
| 70 |
C prcAtm :: total precip from the atmosphere [kg/m2/s] |
| 71 |
C bi,bj :: Tile indices |
| 72 |
C myTime :: Current time of simulation ( s ) |
| 73 |
C myIter :: Current iteration number in simulation |
| 74 |
C myThid :: My Thread Id number |
| 75 |
_RS land_frc(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 76 |
_RL siceFrac(sNx,sNy) |
| 77 |
_RL prcAtm(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 78 |
INTEGER bi, bj, myIter, myThid |
| 79 |
_RL myTime |
| 80 |
CEOP |
| 81 |
|
| 82 |
#ifdef ALLOW_AIM |
| 83 |
C == Local variables == |
| 84 |
C i,j,I2 :: loop counters |
| 85 |
C convPrcEvp :: units conversion factor for Precip & Evap: |
| 86 |
C :: from AIM units (g/m2/s) to model EmPmR units ( kg/m2/s ) |
| 87 |
_RL convPrcEvp |
| 88 |
_RL icFrac, opFrac |
| 89 |
INTEGER i,j,I2 |
| 90 |
|
| 91 |
C-- Initialisation : |
| 92 |
|
| 93 |
C-- Atmospheric Physics Fluxes |
| 94 |
|
| 95 |
C from g/m2/s to kg/m2/s : |
| 96 |
convPrcEvp = 1. _d -3 |
| 97 |
|
| 98 |
DO j=1,sNy |
| 99 |
DO i=1,sNx |
| 100 |
IF ( land_frc(i,j,bi,bj).GE.1. _d 0 ) THEN |
| 101 |
C- Full Land grid-cell: set all fluxes to zero (this has no effect on the |
| 102 |
C model integration and just put this to get meaningfull diagnostics) |
| 103 |
prcAtm(i,j) = 0. _d 0 |
| 104 |
Qnet(i,j,bi,bj) = 0. _d 0 |
| 105 |
EmPmR(i,j,bi,bj)= 0. _d 0 |
| 106 |
Qsw(i,j,bi,bj) = 0. _d 0 |
| 107 |
ELSE |
| 108 |
I2 = i+(j-1)*sNx |
| 109 |
|
| 110 |
C- Total Precip (no distinction between ice-covered / ice-free fraction): |
| 111 |
prcAtm(i,j) = ( PRECNV(I2,myThid) |
| 112 |
& + PRECLS(I2,myThid) ) |
| 113 |
|
| 114 |
C- Net surface heat flux over ice-free ocean (+=down) |
| 115 |
C note: with aim_splitSIOsFx=F, ice-free & ice covered contribution are |
| 116 |
C already merged together and Qnet is the mean heat flux over the grid box. |
| 117 |
Qnet(i,j,bi,bj) = |
| 118 |
& SSR(I2,2,myThid) |
| 119 |
& - SLR(I2,2,myThid) |
| 120 |
& - SHF(I2,2,myThid) |
| 121 |
& - EVAP(I2,2,myThid)*ALHC |
| 122 |
|
| 123 |
C- E-P over ice-free ocean [m/s]: (same as above is aim_splitSIOsFx=F) |
| 124 |
EmPmR(i,j,bi,bj) = ( EVAP(I2,2,myThid) |
| 125 |
& - prcAtm(i,j) ) * convPrcEvp |
| 126 |
|
| 127 |
C- Net short wave (ice-free ocean) into the ocean (+=down) |
| 128 |
Qsw(i,j,bi,bj) = SSR(I2,2,myThid) |
| 129 |
|
| 130 |
ENDIF |
| 131 |
ENDDO |
| 132 |
ENDDO |
| 133 |
|
| 134 |
#ifdef ALLOW_THSICE |
| 135 |
IF ( useThSIce ) THEN |
| 136 |
DO j=1,sNy |
| 137 |
DO i=1,sNx |
| 138 |
I2 = i+(j-1)*sNx |
| 139 |
C- Mixed-Layer Ocean: (for thsice slab_ocean and coupler) |
| 140 |
C NOTE: masking is now applied much earlier, during initialisation |
| 141 |
c IF (land_frc(i,j,bi,bj).EQ.1. _d 0) hOceMxL(i,j,bi,bj) = 0. |
| 142 |
|
| 143 |
C- Evaporation over sea-ice: (for thsice) |
| 144 |
icFrwAtm(i,j,bi,bj) = EVAP(I2,3,myThid)*convPrcEvp |
| 145 |
|
| 146 |
C- short-wave downward heat flux (ice-free ocean + ice-covered): |
| 147 |
C note: at this point we already called THSICE_IMPL_TEMP to solve for |
| 148 |
C seaice temp and SW flux through the ice. SW is not modified after, and |
| 149 |
C can therefore combine the open-ocean & ice-covered ocean SW fluxes. |
| 150 |
icFrac = iceMask(i,j,bi,bj) |
| 151 |
opFrac = 1. _d 0 - icFrac |
| 152 |
Qsw(i,j,bi,bj) = icFrac*icFlxSW(i,j,bi,bj) |
| 153 |
& + opFrac*Qsw(i,j,bi,bj) |
| 154 |
|
| 155 |
ENDDO |
| 156 |
ENDDO |
| 157 |
|
| 158 |
IF ( aim_energPrecip ) THEN |
| 159 |
C-- Add energy flux related to Precip. (snow, T_rain) over sea-ice |
| 160 |
DO j=1,sNy |
| 161 |
DO i=1,sNx |
| 162 |
IF ( iceMask(i,j,bi,bj).GT.0. _d 0 ) THEN |
| 163 |
I2 = i+(j-1)*sNx |
| 164 |
IF ( EnPrec(I2,myThid).GE.0. _d 0 ) THEN |
| 165 |
C- positive => add to surface heating |
| 166 |
sHeating(i,j,bi,bj) = sHeating(i,j,bi,bj) |
| 167 |
& + EnPrec(I2,myThid)*prcAtm(i,j) |
| 168 |
snowPrc(i,j,bi,bj) = 0. _d 0 |
| 169 |
ELSE |
| 170 |
C- negative => make snow |
| 171 |
snowPrc(i,j,bi,bj) = prcAtm(i,j)*convPrcEvp |
| 172 |
ENDIF |
| 173 |
ELSE |
| 174 |
snowPrc(i,j,bi,bj) = 0. _d 0 |
| 175 |
ENDIF |
| 176 |
ENDDO |
| 177 |
ENDDO |
| 178 |
ENDIF |
| 179 |
|
| 180 |
ELSEIF ( aim_splitSIOsFx ) THEN |
| 181 |
#else /* ALLOW_THSICE */ |
| 182 |
IF ( aim_splitSIOsFx ) THEN |
| 183 |
#endif /* ALLOW_THSICE */ |
| 184 |
C- aim_splitSIOsFx=T: fluxes over sea-ice (3) & ice-free ocean (2) were |
| 185 |
C computed separately and here we merge the 2 fractions |
| 186 |
DO j=1,sNy |
| 187 |
DO i=1,sNx |
| 188 |
I2 = i+(j-1)*sNx |
| 189 |
IF ( siceFrac(i,j) .GT. 0. ) THEN |
| 190 |
icFrac = siceFrac(i,j)/(1. _d 0 - land_frc(i,j,bi,bj)) |
| 191 |
opFrac = 1. _d 0 - icFrac |
| 192 |
|
| 193 |
C- Net surface heat flux over sea-ice + ice-free ocean (+=down) |
| 194 |
Qnet(i,j,bi,bj) = Qnet(i,j,bi,bj)*opFrac |
| 195 |
& + ( SSR(I2,3,myThid) |
| 196 |
& - SLR(I2,3,myThid) |
| 197 |
& - SHF(I2,3,myThid) |
| 198 |
& - EVAP(I2,3,myThid)*ALHC |
| 199 |
& )*icFrac |
| 200 |
C- E-P over sea-ice + ice-free ocean [m/s]: |
| 201 |
EmPmR(i,j,bi,bj) = EmPmR(i,j,bi,bj)*opFrac |
| 202 |
& + ( EVAP(I2,3,myThid) |
| 203 |
& - prcAtm(i,j) ) * convPrcEvp * icFrac |
| 204 |
|
| 205 |
C- Net short wave (ice-free ocean) into the ocean (+=down) |
| 206 |
Qsw(i,j,bi,bj) = opFrac*Qsw(i,j,bi,bj) |
| 207 |
& + icFrac*SSR(I2,3,myThid) |
| 208 |
|
| 209 |
ENDIF |
| 210 |
ENDDO |
| 211 |
ENDDO |
| 212 |
|
| 213 |
C-- end of If useThSIce / elseif aim_splitSIOsFx blocks |
| 214 |
ENDIF |
| 215 |
|
| 216 |
IF ( aim_energPrecip ) THEN |
| 217 |
C-- Ice free fraction: Add energy flux related to Precip. (snow, T_rain): |
| 218 |
DO j=1,sNy |
| 219 |
DO i=1,sNx |
| 220 |
I2 = i+(j-1)*sNx |
| 221 |
Qnet(i,j,bi,bj) = Qnet(i,j,bi,bj) |
| 222 |
& + EnPrec(I2,myThid)*prcAtm(i,j) |
| 223 |
ENDDO |
| 224 |
ENDDO |
| 225 |
ENDIF |
| 226 |
|
| 227 |
DO j=1,sNy |
| 228 |
DO i=1,sNx |
| 229 |
C- Total Precip : convert units |
| 230 |
prcAtm(i,j) = prcAtm(i,j) * convPrcEvp |
| 231 |
C- Oceanic convention: Heat flux are > 0 upward ; reverse sign. |
| 232 |
Qsw(i,j,bi,bj) = -Qsw(i,j,bi,bj) |
| 233 |
Qnet(i,j,bi,bj)= -Qnet(i,j,bi,bj) |
| 234 |
ENDDO |
| 235 |
ENDDO |
| 236 |
|
| 237 |
#endif /* ALLOW_AIM */ |
| 238 |
|
| 239 |
RETURN |
| 240 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph