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C $Header: /u/gcmpack/MITgcm/pkg/aim_v23/aim_surf_bc.F,v 1.8 2004/06/24 23:43:11 jmc Exp $ |
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C $Name: $ |
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|
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#include "AIM_OPTIONS.h" |
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|
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SUBROUTINE AIM_SURF_BC( tYear, myTime, myIter, bi, bj, myThid ) |
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C *================================================================* |
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C | S/R AIM_SURF_BC |
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C | Set surface Boundary Conditions |
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C | for the atmospheric physics package |
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C *================================================================* |
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c | was part of S/R FORDATE in Franco Molteni SPEEDY code (ver23). |
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C | For now, surface BC are loaded from files (S/R AIM_FIELDS_LOAD) |
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C | and imposed (= surf. forcing). |
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C | In the future, will add |
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C | a land model and a coupling interface with an ocean GCM |
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C *================================================================* |
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IMPLICIT NONE |
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|
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C -------------- Global variables -------------- |
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C-- size for MITgcm & Physics package : |
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#include "AIM_SIZE.h" |
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|
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C-- MITgcm |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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c #include "DYNVARS.h" |
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c #include "GRID.h" |
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c #include "SURFACE.h" |
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|
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C-- Physics package |
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#include "AIM_PARAMS.h" |
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#include "AIM_FFIELDS.h" |
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c #include "AIM_GRID.h" |
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#include "com_forcon.h" |
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#include "com_forcing.h" |
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c #include "com_physvar.h" |
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|
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C-- Coupled to the Ocean : |
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#ifdef COMPONENT_MODULE |
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#include "CPL_PARAMS.h" |
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#include "ATMCPL.h" |
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#endif |
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|
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C == Routine arguments == |
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C tYear - Fraction into year |
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C myTime - Current time of simulation ( s ) |
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C myIter - Current iteration number in simulation |
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C bi,bj - Tile index |
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C myThid - Number of this instance of the routine |
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INTEGER myIter, bi, bj, myThid |
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_RL tYear, myTime |
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|
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#ifdef ALLOW_AIM |
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C == Local variables == |
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C i,j,k,I2,k - Loop counters |
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INTEGER i,j,I2,k |
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_RL SDEP1, IDEP2, SDEP2, SWWIL2, RSW, soilw_0, soilw_1 |
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_RL RSD, alb_land, oceTfreez |
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c _RL DALB, alb_sea |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C- Set Land-sea mask (in [0,1]) from aim_landFr to fMask1: |
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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fMask1(I2,1,myThid) = aim_landFr(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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|
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IF (aim_useFMsurfBC) THEN |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C-- Compute surface forcing at present time (linear Interp in time) |
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C using F.Molteni surface BC form ; fields needed are: |
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C 1. Sea Surface temperatures (in situ Temp. [K]) |
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C 2. Land Surface temperatures (in situ Temp. [K]) |
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C 3. Soil moisture (between 0-1) |
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C 4. Snow depth, Sea Ice : used to compute albedo (=> local arrays) |
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C 5. Albedo (between 0-1) |
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|
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C- Surface Temperature: |
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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sst1(I2,myThid) = aim_sWght0*aim_sst0(i,j,bi,bj) |
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& + aim_sWght1*aim_sst1(i,j,bi,bj) |
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stl1(I2,myThid) = aim_sWght0*aim_lst0(i,j,bi,bj) |
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& + aim_sWght1*aim_lst1(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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|
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C- Soil Water availability : (from F.M. INFORC S/R) |
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SDEP1 = 70. _d 0 |
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IDEP2 = 3. _d 0 |
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SDEP2 = IDEP2*SDEP1 |
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|
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SWWIL2= SDEP2*SWWIL |
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RSW = 1. _d 0/(SDEP1*SWCAP+SDEP2*(SWCAP-SWWIL)) |
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|
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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soilw_0 = ( aim_sw10(i,j,bi,bj) |
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& +aim_veget(i,j,bi,bj)* |
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& MAX(IDEP2*aim_sw20(i,j,bi,bj)-SWWIL2, 0. _d 0) |
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& )*RSW |
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soilw_1 = ( aim_sw11(i,j,bi,bj) |
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& +aim_veget(i,j,bi,bj)* |
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& MAX(IDEP2*aim_sw21(i,j,bi,bj)-SWWIL2, 0. _d 0) |
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& )*RSW |
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soilw1(I2,myThid) = aim_sWght0*soilw_0 |
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& + aim_sWght1*soilw_1 |
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soilw1(I2,myThid) = MIN(1. _d 0, soilw1(I2,myThid) ) |
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ENDDO |
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ENDDO |
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|
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C- Set snow depth & sea-ice fraction : |
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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snow1(I2) = aim_sWght0*aim_snw0(i,j,bi,bj) |
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& + aim_sWght1*aim_snw1(i,j,bi,bj) |
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oice1(I2) = aim_sWght0*aim_oic0(i,j,bi,bj) |
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& + aim_sWght1*aim_oic1(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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|
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IF (aim_splitSIOsFx) THEN |
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C- Split Ocean and Sea-Ice surf. temp. ; remove ice-fraction < 1 % |
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c oceTfreez = tFreeze - 1.9 _d 0 |
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oceTfreez = celsius2K - 1.9 _d 0 |
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DO J=1,NGP |
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sti1(J,myThid) = sst1(J,myThid) |
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IF ( oice1(J) .GT. 1. _d -2 ) THEN |
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sst1(J,myThid) = MAX(sst1(J,myThid),oceTfreez) |
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sti1(J,myThid) = sst1(J,myThid) |
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& +(sti1(J,myThid)-sst1(J,myThid))/oice1(J) |
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ELSE |
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oice1(J) = 0. _d 0 |
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ENDIF |
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ENDDO |
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ELSE |
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DO J=1,NGP |
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sti1(J,myThid) = sst1(J,myThid) |
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ENDDO |
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ENDIF |
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|
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C- Surface Albedo : (from F.M. FORDATE S/R) |
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c_FM DALB=ALBICE-ALBSEA |
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RSD=1. _d 0/SDALB |
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DO j=1,sNy |
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DO i=1,sNx |
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c_FM SNOWC=MIN(1.,RSD*SNOW1(I,J)) |
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c_FM ALBL=ALB0(I,J)+MAX(ALBSN-ALB0(I,J),0.0)*SNOWC |
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c_FM ALBS=ALBSEA+DALB*OICE1(I,J) |
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c_FM ALB1(I,J)=FMASK1(I,J)*ALBL+FMASK0(I,J)*ALBS |
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I2 = i+(j-1)*sNx |
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alb_land = aim_albedo(i,j,bi,bj) |
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& + MAX( 0. _d 0, ALBSN-aim_albedo(i,j,bi,bj) ) |
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& *MIN( 1. _d 0, RSD*snow1(I2)) |
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c alb_sea = ALBSEA + DALB*oice1(I2) |
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c alb1(I2,0,myThid) = alb_sea |
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c & + (alb_land - alb_sea)*fMask1(I2,1,myThid) |
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alb1(I2,1,myThid) = alb_land |
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alb1(I2,2,myThid) = ALBSEA |
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alb1(I2,3,myThid) = ALBICE |
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ENDDO |
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ENDDO |
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|
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C-- else aim_useFMsurfBC |
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ELSE |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C- Set surface forcing fields needed by atmos. physics package |
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C 1. Albedo (between 0-1) |
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C 2. Sea Surface temperatures (in situ Temp. [K]) |
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C 3. Land Surface temperatures (in situ Temp. [K]) |
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C 4. Soil moisture (between 0-1) |
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C Snow depth, Sea Ice (<- no need for now) |
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|
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C Set surface albedo data (in [0,1]) from aim_albedo to alb1 : |
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IF (aim_useMMsurfFc) THEN |
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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alb1(I2,1,myThid) = aim_albedo(i,j,bi,bj) |
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alb1(I2,2,myThid) = aim_albedo(i,j,bi,bj) |
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alb1(I2,3,myThid) = aim_albedo(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ELSE |
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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alb1(I2,1,myThid) = 0. |
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alb1(I2,2,myThid) = 0. |
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alb1(I2,3,myThid) = 0. |
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ENDDO |
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ENDDO |
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ENDIF |
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C Set surface temperature data from aim_S/LSurfTemp to sst1 & stl1 : |
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IF (aim_useMMsurfFc) THEN |
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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sst1(I2,myThid) = aim_surfTemp(i,j,bi,bj) |
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stl1(I2,myThid) = aim_surfTemp(i,j,bi,bj) |
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sti1(I2,myThid) = aim_surfTemp(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ELSE |
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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sst1(I2,myThid) = 300. |
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stl1(I2,myThid) = 300. |
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sti1(I2,myThid) = 300. |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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C- Set soil water availability (in [0,1]) from aim_soilWater to soilw1 : |
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IF (aim_useMMsurfFc) THEN |
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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soilw1(I2,myThid) = aim_soilWater(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ELSE |
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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soilw1(I2,myThid) = 0. |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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C- Set Snow depth and Sea Ice |
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C (not needed here since albedo is loaded from file) |
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DO j=1,sNy |
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DO i=1,sNx |
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I2 = i+(j-1)*sNx |
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oice1(I2) = 0. |
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snow1(I2) = 0. |
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ENDDO |
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ENDDO |
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|
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C-- endif/else aim_useFMsurfBC |
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ENDIF |
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|
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#ifdef COMPONENT_MODULE |
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IF ( useCoupler ) THEN |
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C-- take surface data from the ocean component |
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C to replace MxL fields (if use sea-ice) or directly AIM SST |
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CALL ATM_APPLY_IMPORT( |
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I aim_landFr, |
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U sst1(1,mythid), oice1, |
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I myTime, myIter, bi, bj, myThid ) |
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ENDIF |
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#endif /* COMPONENT_MODULE */ |
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|
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#ifdef ALLOW_LAND |
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IF (useLand) THEN |
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C- Use land model output instead of prescribed Temp & moisture |
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CALL AIM_LAND2AIM( |
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I aim_landFr, aim_veget, aim_albedo, snow1, |
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U stl1(1,mythid), soilw1(1,mythid), alb1(1,1,myThid), |
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I myTime, myIter, bi, bj, myThid ) |
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ENDIF |
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#endif /* ALLOW_LAND */ |
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|
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#ifdef ALLOW_THSICE |
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IF (useThSIce) THEN |
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C- Use thermo. sea-ice model output instead of prescribed Temp & albedo |
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CALL AIM_SICE2AIM( |
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I aim_landFr, |
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U sst1(1,mythid), oice1, |
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O sti1(1,mythid), alb1(1,3,myThid), |
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I myTime, myIter, bi, bj, myThid ) |
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ENDIF |
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#endif /* ALLOW_THSICE */ |
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|
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C-- set the sea-ice & open ocean fraction : |
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DO J=1,NGP |
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fMask1(J,3,myThid) =(1. _d 0 - fMask1(J,1,myThid)) |
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& *oice1(J) |
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fMask1(J,2,myThid) = 1. _d 0 - fMask1(J,1,myThid) |
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& - fMask1(J,3,myThid) |
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ENDDO |
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|
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C-- set the mean albedo : |
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DO J=1,NGP |
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alb1(J,0,myThid) = fMask1(J,1,myThid)*alb1(J,1,myThid) |
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& + fMask1(J,2,myThid)*alb1(J,2,myThid) |
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& + fMask1(J,3,myThid)*alb1(J,3,myThid) |
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ENDDO |
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|
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C-- initialize surf. temp. change to zero: |
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DO k=1,3 |
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DO J=1,NGP |
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dTsurf(J,k,myThid) = 0. |
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ENDDO |
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ENDDO |
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|
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IF (.NOT.aim_splitSIOsFx) THEN |
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DO J=1,NGP |
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fMask1(J,3,myThid) = 0. _d 0 |
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fMask1(J,2,myThid) = 1. _d 0 - fMask1(J,1,myThid) |
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ENDDO |
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ENDIF |
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|
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#endif /* ALLOW_AIM */ |
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|
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RETURN |
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END |
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