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C $Header: /u/gcmpack/MITgcm/pkg/seaice/seaice_growth.F,v 1.9 2006/12/21 10:50:46 mlosch Exp $ |
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C $Name: $ |
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|
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#include "SEAICE_OPTIONS.h" |
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|
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CStartOfInterface |
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SUBROUTINE SEAICE_GROWTH( myTime, myIter, myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE seaice_growth | |
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C | o Updata ice thickness and snow depth | |
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C |==========================================================| |
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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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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "DYNVARS.h" |
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#include "GRID.h" |
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#include "FFIELDS.h" |
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#include "SEAICE_PARAMS.h" |
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#include "SEAICE.h" |
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#include "SEAICE_FFIELDS.h" |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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# include "tamc.h" |
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#endif |
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C === Routine arguments === |
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C myTime - Simulation time |
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C myIter - Simulation timestep number |
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C myThid - Thread no. that called this routine. |
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_RL myTime |
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INTEGER myIter, myThid |
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CEndOfInterface |
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|
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C === Local variables === |
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C i,j,bi,bj - Loop counters |
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|
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INTEGER i, j, bi, bj |
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C number of surface interface layer |
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INTEGER kSurface |
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C constants |
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_RL TBC, salinity_ice, SDF, ICE2WATR, ICE2SNOW |
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_RL QI, recip_QI, QS, recip_QS |
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C auxillary variables |
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_RL availHeat, hEffOld, snowEnergy, snowAsIce |
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_RL growthHEFF, growthNeg |
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#ifdef ALLOW_SEAICE_FLOODING |
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_RL hDraft, hFlood |
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#endif /* ALLOW_SEAICE_FLOODING */ |
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_RL GAREA ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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_RL GHEFF ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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C RESID_HEAT is residual heat above freezing in equivalent m of ice |
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_RL RESID_HEAT ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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|
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C FICE - thermodynamic ice growth rate over sea ice in W/m^2 |
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C >0 causes ice growth, <0 causes snow and sea ice melt |
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C FHEFF - effective thermodynamic ice growth rate over sea ice in W/m^2 |
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C >0 causes ice growth, <0 causes snow and sea ice melt |
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C QNETO - thermodynamic ice growth rate over open water in W/m^2 |
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C ( = surface heat flux ) |
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C >0 causes ice growth, <0 causes snow and sea ice melt |
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C QNETI - net surface heat flux under ice in W/m^2 |
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C QSWO - short wave heat flux over ocean in W/m^2 |
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C QSWI - short wave heat flux under ice in W/m^2 |
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_RL FHEFF (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL FICE (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL QNETO (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL QNETI (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL QSWO (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL QSWI (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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C |
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_RL HCORR (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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C frWtrIce contains m of ice melted (<0) or created (>0) |
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_RL frWtrIce(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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C actual ice thickness with upper and lower limit |
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_RL HICE (1-OLx:sNx+OLx, 1-OLy:sNy+OLy) |
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C actual snow thickness |
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_RL hSnwLoc(1-OLx:sNx+OLx, 1-OLy:sNy+OLy) |
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C wind speed |
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_RL UG (1-OLx:sNx+OLx, 1-OLy:sNy+OLy) |
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_RL SPEED_SQ |
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C local copy of AREA |
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_RL areaLoc |
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|
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#ifdef SEAICE_MULTICATEGORY |
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INTEGER it |
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INTEGER ilockey |
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_RL RK |
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_RL HICEP(1-OLx:sNx+OLx, 1-OLy:sNy+OLy) |
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_RL FICEP(1-OLx:sNx+OLx, 1-OLy:sNy+OLy) |
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_RL QSWIP(1-OLx:sNx+OLx, 1-OLy:sNy+OLy) |
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#endif |
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|
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if ( buoyancyRelation .eq. 'OCEANICP' ) then |
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kSurface = Nr |
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else |
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kSurface = 1 |
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endif |
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|
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C ICE SALINITY (g/kg) |
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salinity_ice = 4.0 _d 0 |
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C FREEZING TEMP. OF SEA WATER (deg C) |
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TBC = SEAICE_freeze |
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C RATIO OF WATER DESITY TO SNOW DENSITY |
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SDF = 1000.0 _d 0/330.0 _d 0 |
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C RATIO OF SEA ICE DESITY TO WATER DENSITY |
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ICE2WATR = 0.920 _d 0 |
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C this makes more sense, but changes the results |
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C ICE2WATR = SEAICE_rhoIce * 1. _d -03 |
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C RATIO OF SEA ICE DENSITY to SNOW DENSITY |
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ICE2SNOW = SDF * ICE2WATR |
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C HEAT OF FUSION OF ICE (m^3/J) |
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QI = 302.0 _d +06 |
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recip_QI = 1.0 _d 0 / QI |
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C HEAT OF FUSION OF SNOW (J/m^3) |
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QS = 1.1 _d +08 |
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recip_QS = 1.1 _d 0 / QS |
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|
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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c |
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#ifdef ALLOW_AUTODIFF_TAMC |
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act1 = bi - myBxLo(myThid) |
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max1 = myBxHi(myThid) - myBxLo(myThid) + 1 |
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act2 = bj - myByLo(myThid) |
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max2 = myByHi(myThid) - myByLo(myThid) + 1 |
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act3 = myThid - 1 |
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max3 = nTx*nTy |
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act4 = ikey_dynamics - 1 |
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iicekey = (act1 + 1) + act2*max1 |
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& + act3*max1*max2 |
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& + act4*max1*max2*max3 |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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C |
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C initialise a few fields |
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C |
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE area(:,:,:,bi,bj) = comlev1_bibj, |
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CADJ & key = iicekey, byte = isbyte |
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CADJ STORE qnet(:,:,bi,bj) = comlev1_bibj, |
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CADJ & key = iicekey, byte = isbyte |
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CADJ STORE qsw(:,:,bi,bj) = comlev1_bibj, |
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CADJ & key = iicekey, byte = isbyte |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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DO J=1,sNy |
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DO I=1,sNx |
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FHEFF(I,J) = 0.0 _d 0 |
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FICE (I,J) = 0.0 _d 0 |
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#ifdef SEAICE_MULTICATEGORY |
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FICEP(I,J) = 0.0 _d 0 |
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QSWIP(I,J) = 0.0 _d 0 |
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#endif |
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FHEFF(I,J) = 0.0 _d 0 |
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FICE (I,J) = 0.0 _d 0 |
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QNETO(I,J) = 0.0 _d 0 |
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QNETI(I,J) = 0.0 _d 0 |
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QSWO (I,J) = 0.0 _d 0 |
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QSWI (I,J) = 0.0 _d 0 |
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HCORR(I,J) = 0.0 _d 0 |
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frWtrIce(I,J) = 0.0 _d 0 |
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RESID_HEAT(I,J) = 0.0 _d 0 |
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ENDDO |
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ENDDO |
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE heff(:,:,:,bi,bj) = comlev1_bibj, |
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CADJ & key = iicekey, byte = isbyte |
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CADJ STORE hsnow(:,:,bi,bj) = comlev1_bibj, |
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CADJ & key = iicekey, byte = isbyte |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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DO J=1,sNy |
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DO I=1,sNx |
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C COMPUTE ACTUAL ICE THICKNESS AND PUT MINIMUM/MAXIMUM |
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C ON ICE THICKNESS FOR BUDGET COMPUTATION |
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C The default of A22 = 0.15 is a common threshold for defining |
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C the ice edge. This ice concentration usually does not occur |
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C due to thermodynamics but due to advection. |
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areaLoc = MAX(A22,AREA(I,J,2,bi,bj)) |
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HICE(I,J) = HEFF(I,J,2,bi,bj)/areaLoc |
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C Do we know what this is for? |
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HICE(I,J) = MAX(HICE(I,J),0.05 _d +00) |
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C Capping the actual ice thickness effectively enforces a |
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C minimum of heat flux through the ice and helps getting rid of |
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C very thick ice. |
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HICE(I,J) = MIN(HICE(I,J),9.0 _d +00) |
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hSnwLoc(I,J) = HSNOW(I,J,bi,bj)/areaLoc |
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ENDDO |
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ENDDO |
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|
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C NOW DETERMINE MIXED LAYER TEMPERATURE |
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DO J=1,sNy |
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DO I=1,sNx |
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TMIX(I,J,bi,bj)=theta(I,J,kSurface,bi,bj)+273.16 _d +00 |
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#ifdef SEAICE_DEBUG |
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TMIX(I,J,bi,bj)=MAX(TMIX(I,J,bi,bj),271.2 _d +00) |
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#endif |
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ENDDO |
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ENDDO |
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|
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C THERMAL WIND OF ATMOSPHERE |
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DO J=1,sNy |
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DO I=1,sNx |
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CML#ifdef SEAICE_EXTERNAL_FORCING |
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CMLC this seems to be more natural as we do compute the wind speed in |
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CMLC pkg/exf/exf_wind.F, but it changes the results |
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CML UG(I,J) = MAX(SEAICE_EPS,wspeed(I,J,bi,bj)) |
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CML#else |
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SPEED_SQ = UWIND(I,J,bi,bj)**2 + VWIND(I,J,bi,bj)**2 |
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IF ( SPEED_SQ .LE. SEAICE_EPS_SQ ) THEN |
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UG(I,J)=SEAICE_EPS |
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ELSE |
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UG(I,J)=SQRT(SPEED_SQ) |
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ENDIF |
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CML#endif /* SEAICE_EXTERNAL_FORCING */ |
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ENDDO |
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ENDDO |
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|
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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cphCADJ STORE heff = comlev1, key = ikey_dynamics |
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cphCADJ STORE hsnow = comlev1, key = ikey_dynamics |
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cphCADJ STORE uwind = comlev1, key = ikey_dynamics |
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cphCADJ STORE vwind = comlev1, key = ikey_dynamics |
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c |
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CADJ STORE tice = comlev1, key = ikey_dynamics |
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# ifdef SEAICE_MULTICATEGORY |
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CADJ STORE tices = comlev1, key = ikey_dynamics |
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# endif |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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|
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C NOW DETERMINE GROWTH RATES |
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C FIRST DO OPEN WATER |
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CALL SEAICE_BUDGET_OCEAN( |
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I UG, |
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U TMIX, |
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O QNETO, QSWO, |
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I bi, bj) |
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|
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C NOW DO ICE |
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#ifdef SEAICE_MULTICATEGORY |
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C-- Start loop over muli-categories |
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DO IT=1,MULTDIM |
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#ifdef ALLOW_AUTODIFF_TAMC |
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ilockey = (iicekey-1)*MULTDIM + IT |
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CADJ STORE tices(:,:,it,bi,bj) = comlev1_multdim, |
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CADJ & key = ilockey, byte = isbyte |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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RK=REAL(IT) |
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DO J=1,sNy |
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DO I=1,sNx |
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HICEP(I,J)=(HICE(I,J)/MULTDIM)*((2.0 _d 0*RK)-1.0 _d 0) |
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TICE(I,J,bi,bj)=TICES(I,J,IT,bi,bj) |
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ENDDO |
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ENDDO |
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CALL SEAICE_BUDGET_ICE( |
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I UG, HICEP, hSnwLoc, |
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U TICE, |
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O FICEP, QSWIP, |
260 |
I bi, bj) |
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DO J=1,sNy |
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DO I=1,sNx |
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C average surface heat fluxes/growth rates |
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FICE (I,J) = FICE(I,J) + FICEP(I,J)/MULTDIM |
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QSWI (I,J) = QSWI(I,J) + QSWIP(I,J)/MULTDIM |
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TICES(I,J,IT,bi,bj) = TICE(I,J,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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C-- End loop over multi-categories |
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#else /* SEAICE_MULTICATEGORY */ |
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CALL SEAICE_BUDGET_ICE( |
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I UG, HICE, hSnwLoc, |
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U TICE, |
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O FICE, QSWI, |
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I bi, bj) |
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#endif /* SEAICE_MULTICATEGORY */ |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE theta(:,:,:,bi,bj)= comlev1_bibj, |
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CADJ & key = iicekey, byte = isbyte |
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CADJ STORE heff(:,:,:,bi,bj) = comlev1_bibj, |
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CADJ & key = iicekey, byte = isbyte |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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C |
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C-- compute and apply ice growth due to oceanic heat flux from below |
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C |
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DO J=1,sNy |
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DO I=1,sNx |
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C-- Create or melt sea-ice so that first-level oceanic temperature |
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C is approximately at the freezing point when there is sea-ice. |
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C Initially the units of YNEG/availHeat are m of sea-ice. |
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C The factor dRf(1)/72.0764, used to convert temperature |
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C change in deg K to m of sea-ice, is approximately: |
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C dRf(1) * (sea water heat capacity = 3996 J/kg/K) |
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C * (density of sea-water = 1026 kg/m^3) |
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C / (latent heat of fusion of sea-ice = 334000 J/kg) |
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C / (density of sea-ice = 910 kg/m^3) |
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C Negative YNEG/availHeat leads to ice growth. |
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C Positive YNEG/availHeat leads to ice melting. |
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IF ( .NOT. inAdMode ) THEN |
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#ifdef SEAICE_VARIABLE_FREEZING_POINT |
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TBC = -0.0575 _d 0*salt(I,J,kSurface,bi,bj) + 0.0901 _d 0 |
304 |
#endif /* SEAICE_VARIABLE_FREEZING_POINT */ |
305 |
availHeat = (theta(I,J,kSurface,bi,bj)-TBC) |
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& *dRf(1)/72.0764 _d 0 |
307 |
ELSE |
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availHeat = 0. |
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ENDIF |
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C local copy of old effective ice thickness |
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hEffOld = HEFF(I,J,1,bi,bj) |
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C Melt (availHeat>0) or create (availHeat<0) sea ice |
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HEFF(I,J,1,bi,bj) = MAX(ZERO,HEFF(I,J,1,bi,bj)-availHeat) |
314 |
C |
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YNEG(I,J,bi,bj) = hEffOld - HEFF(I,J,1,bi,bj) |
316 |
C |
317 |
frWtrIce(I,J) = frWtrIce(I,J) - YNEG(I,J,bi,bj) |
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RESID_HEAT(I,J) = availHeat - YNEG(I,J,bi,bj) |
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C YNEG now contains m of ice melted (>0) or created (<0) |
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C frWtrIce contains m of ice melted (<0) or created (>0) |
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C RESID_HEAT is residual heat above freezing in equivalent m of ice |
322 |
ENDDO |
323 |
ENDDO |
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|
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cph( |
326 |
#ifdef ALLOW_AUTODIFF_TAMC |
327 |
cphCADJ STORE heff = comlev1, key = ikey_dynamics |
328 |
cphCADJ STORE hsnow = comlev1, key = ikey_dynamics |
329 |
#endif |
330 |
cph) |
331 |
c |
332 |
#ifdef ALLOW_AUTODIFF_TAMC |
333 |
CADJ STORE area(:,:,:,bi,bj) = comlev1_bibj, |
334 |
CADJ & key = iicekey, byte = isbyte |
335 |
CADJ STORE hsnow(:,:,bi,bj) = comlev1_bibj, |
336 |
CADJ & key = iicekey, byte = isbyte |
337 |
CADJ STORE fice(:,:) = comlev1_bibj, |
338 |
CADJ & key = iicekey, byte = isbyte |
339 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
340 |
cph) |
341 |
C |
342 |
C-- compute and apply ice growth due to atmospheric fluxes from above |
343 |
C |
344 |
DO J=1,sNy |
345 |
DO I=1,sNx |
346 |
C NOW CALCULATE CORRECTED effective growth in J/m^2 (>0=melt) |
347 |
GHEFF(I,J)=-SEAICE_deltaTtherm*FICE(I,J)*AREA(I,J,2,bi,bj) |
348 |
ENDDO |
349 |
ENDDO |
350 |
|
351 |
#ifdef ALLOW_AUTODIFF_TAMC |
352 |
CADJ STORE fice(:,:) = comlev1_bibj, |
353 |
CADJ & key = iicekey, byte = isbyte |
354 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
355 |
|
356 |
DO J=1,sNy |
357 |
DO I=1,sNx |
358 |
IF(FICE(I,J).LT.ZERO.AND.AREA(I,J,2,bi,bj).GT.ZERO) THEN |
359 |
C use FICE to melt snow and CALCULATE CORRECTED GROWTH |
360 |
C effective snow thickness in J/m^2 |
361 |
snowEnergy=HSNOW(I,J,bi,bj)*QS |
362 |
IF(GHEFF(I,J).LE.snowEnergy) THEN |
363 |
C not enough heat to melt all snow; use up all heat flux FICE |
364 |
HSNOW(I,J,bi,bj)=HSNOW(I,J,bi,bj)-GHEFF(I,J)/QS |
365 |
C SNOW CONVERTED INTO WATER AND THEN INTO equivalent m of ICE melt |
366 |
C The factor 1/ICE2SNOW converts m of snow to m of sea-ice |
367 |
frWtrIce(I,J) = frWtrIce(I,J) - GHEFF(I,J)/(QS*ICE2SNOW) |
368 |
FICE (I,J) = ZERO |
369 |
ELSE |
370 |
C enought heat to melt snow completely; |
371 |
C compute remaining heat flux that will melt ice |
372 |
FICE(I,J)=-(GHEFF(I,J)-snowEnergy)/ |
373 |
& SEAICE_deltaTtherm/AREA(I,J,2,bi,bj) |
374 |
C convert all snow to melt water (fresh water flux) |
375 |
frWtrIce(I,J) = frWtrIce(I,J) |
376 |
& -HSNOW(I,J,bi,bj)/ICE2SNOW |
377 |
HSNOW(I,J,bi,bj)=0.0 |
378 |
END IF |
379 |
END IF |
380 |
ENDDO |
381 |
ENDDO |
382 |
|
383 |
#ifdef ALLOW_AUTODIFF_TAMC |
384 |
CADJ STORE fice(:,:) = comlev1_bibj, |
385 |
CADJ & key = iicekey, byte = isbyte |
386 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
387 |
|
388 |
DO J=1,sNy |
389 |
DO I=1,sNx |
390 |
C now get cell averaged growth rate in W/m^2, >0 causes ice growth |
391 |
FHEFF(I,J)= FICE(I,J) * AREA(I,J,2,bi,bj) |
392 |
& + QNETO(I,J) * (ONE-AREA(I,J,2,bi,bj)) |
393 |
ENDDO |
394 |
ENDDO |
395 |
cph( |
396 |
#ifdef ALLOW_AUTODIFF_TAMC |
397 |
CADJ STORE heff(:,:,:,bi,bj) = comlev1_bibj, |
398 |
CADJ & key = iicekey, byte = isbyte |
399 |
CADJ STORE hsnow(:,:,bi,bj) = comlev1_bibj, |
400 |
CADJ & key = iicekey, byte = isbyte |
401 |
CADJ STORE fice(:,:) = comlev1_bibj, |
402 |
CADJ & key = iicekey, byte = isbyte |
403 |
CADJ STORE fheff(:,:) = comlev1_bibj, |
404 |
CADJ & key = iicekey, byte = isbyte |
405 |
CADJ STORE qneto(:,:) = comlev1_bibj, |
406 |
CADJ & key = iicekey, byte = isbyte |
407 |
CADJ STORE qswi(:,:) = comlev1_bibj, |
408 |
CADJ & key = iicekey, byte = isbyte |
409 |
CADJ STORE qswo(:,:) = comlev1_bibj, |
410 |
CADJ & key = iicekey, byte = isbyte |
411 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
412 |
cph) |
413 |
#ifdef ALLOW_AUTODIFF_TAMC |
414 |
CADJ STORE area(:,:,:,bi,bj) = comlev1_bibj, |
415 |
CADJ & key = iicekey, byte = isbyte |
416 |
#endif |
417 |
C |
418 |
C First update (freeze or melt) ice area |
419 |
C |
420 |
DO J=1,sNy |
421 |
DO I=1,sNx |
422 |
C negative growth in meters of ice (>0 for melting) |
423 |
growthNeg = -SEAICE_deltaTtherm*FHEFF(I,J)*recip_QI |
424 |
C negative growth must not exceed effective ice thickness (=volume) |
425 |
C (that is, cannot melt more than all the ice) |
426 |
growthHEFF = -ONE*MIN(HEFF(I,J,1,bi,bj),growthNeg) |
427 |
C growthHEFF < 0 means melting |
428 |
HCORR(I,J) = MIN(ZERO,growthHEFF) |
429 |
C gain of new effective ice thickness over open water (>0 by definition) |
430 |
GAREA(I,J) = MAX(ZERO,SEAICE_deltaTtherm*QNETO(I,J)*recip_QI) |
431 |
CML removed these loops and moved TAMC store directive up |
432 |
CML ENDDO |
433 |
CML ENDDO |
434 |
CML#ifdef ALLOW_AUTODIFF_TAMC |
435 |
CMLCADJ STORE area(:,:,:,bi,bj) = comlev1_bibj, |
436 |
CMLCADJ & key = iicekey, byte = isbyte |
437 |
CML#endif |
438 |
CML DO J=1,sNy |
439 |
CML DO I=1,sNx |
440 |
C Here we finally compute the new AREA |
441 |
AREA(I,J,1,bi,bj)=AREA(I,J,1,bi,bj)+ |
442 |
& (ONE-AREA(I,J,2,bi,bj))*GAREA(I,J)/HO |
443 |
& +HALF*HCORR(I,J)*AREA(I,J,2,bi,bj) |
444 |
& /(HEFF(I,J,1,bi,bj)+.00001 _d 0) |
445 |
ENDDO |
446 |
ENDDO |
447 |
#ifdef ALLOW_AUTODIFF_TAMC |
448 |
CADJ STORE area(:,:,:,bi,bj) = comlev1_bibj, |
449 |
CADJ & key = iicekey, byte = isbyte |
450 |
#endif |
451 |
C |
452 |
C now update (freeze or melt) HEFF |
453 |
C |
454 |
DO J=1,sNy |
455 |
DO I=1,sNx |
456 |
C negative growth (>0 for melting) of existing ice in meters |
457 |
growthNeg = -SEAICE_deltaTtherm* |
458 |
& FICE(I,J)*recip_QI*AREA(I,J,2,bi,bj) |
459 |
C negative growth must not exceed effective ice thickness (=volume) |
460 |
C (that is, cannot melt more than all the ice) |
461 |
growthHEFF = -ONE*MIN(HEFF(I,J,1,bi,bj),growthNeg) |
462 |
C growthHEFF < 0 means melting |
463 |
HEFF(I,J,1,bi,bj)= HEFF(I,J,1,bi,bj) + growthHEFF |
464 |
C add effective growth to fresh water of ice |
465 |
frWtrIce(I,J) = frWtrIce(I,J) + growthHEFF |
466 |
|
467 |
C now calculate QNETI under ice (if any) as the difference between |
468 |
C the available "heat flux" growthNeg and the actual growthHEFF; |
469 |
C keep in mind that growthNeg and growthHEFF have different signs |
470 |
C by construction |
471 |
QNETI(I,J) = (growthHEFF + growthNeg)*QI/SEAICE_deltaTtherm |
472 |
|
473 |
C now update other things |
474 |
|
475 |
IF(FICE(I,J).GT.ZERO) THEN |
476 |
C freezing, add precip as snow |
477 |
HSNOW(I,J,bi,bj) = HSNOW(I,J,bi,bj)+SEAICE_deltaTtherm* |
478 |
& PRECIP(I,J,bi,bj)*AREA(I,J,2,bi,bj)*SDF |
479 |
ELSE |
480 |
C add precip as rain, water converted into equivalent m of |
481 |
C ice by 1/ICE2WATR. |
482 |
C Do not get confused by the sign: |
483 |
C precip > 0 for downward flux of fresh water |
484 |
C frWtrIce > 0 for more ice (corresponds to an upward "fresh water flux"), |
485 |
C so that here the rain is added *as if* it is melted ice (which is not |
486 |
C true, but just a trick; physically the rain just runs as water |
487 |
C through the ice into the ocean) |
488 |
frWtrIce(I,J) = frWtrIce(I,J) |
489 |
& -PRECIP(I,J,bi,bj)*AREA(I,J,2,bi,bj)* |
490 |
& SEAICE_deltaTtherm/ICE2WATR |
491 |
ENDIF |
492 |
|
493 |
C Now melt snow if there is residual heat left in surface level |
494 |
C Note that units of YNEG and frWtrIce are m of ice |
495 |
cph( very sensitive bit here by JZ |
496 |
IF( RESID_HEAT(I,J) .GT. ZERO .AND. |
497 |
& HSNOW(I,J,bi,bj) .GT. ZERO ) THEN |
498 |
GHEFF(I,J) = MIN( HSNOW(I,J,bi,bj)/SDF/ICE2WATR, |
499 |
& RESID_HEAT(I,J) ) |
500 |
YNEG(I,J,bi,bj) = YNEG(I,J,bi,bj) +GHEFF(I,J) |
501 |
HSNOW(I,J,bi,bj) = HSNOW(I,J,bi,bj)-GHEFF(I,J)*SDF*ICE2WATR |
502 |
frWtrIce(I,J) = frWtrIce(I,J) -GHEFF(I,J) |
503 |
ENDIF |
504 |
cph) |
505 |
|
506 |
C NOW GET FRESH WATER FLUX |
507 |
EmPmR(I,J,bi,bj) = maskC(I,J,kSurface,bi,bj)*( |
508 |
& ( EVAP(I,J,bi,bj)-PRECIP(I,J,bi,bj) ) |
509 |
& * ( ONE - AREA(I,J,2,bi,bj) ) |
510 |
& - RUNOFF(I,J,bi,bj) |
511 |
& + frWtrIce(I,J)*ICE2WATR/SEAICE_deltaTtherm |
512 |
& ) |
513 |
|
514 |
C NOW GET TOTAL QNET AND QSW |
515 |
QNET(I,J,bi,bj) = QNETI(I,J) * AREA(I,J,2,bi,bj) |
516 |
& +QNETO(I,J) * (ONE-AREA(I,J,2,bi,bj)) |
517 |
QSW(I,J,bi,bj) = QSWI(I,J) * AREA(I,J,2,bi,bj) |
518 |
& +QSWO(I,J) * (ONE-AREA(I,J,2,bi,bj)) |
519 |
|
520 |
C Now convert YNEG back to deg K. |
521 |
YNEG(I,J,bi,bj) = YNEG(I,J,bi,bj)*recip_dRf(1)*72.0764 _d 0 |
522 |
|
523 |
C Add YNEG contribution to QNET |
524 |
QNET(I,J,bi,bj) = QNET(I,J,bi,bj) |
525 |
& +YNEG(I,J,bi,bj)/SEAICE_deltaTtherm |
526 |
& *maskC(I,J,kSurface,bi,bj) |
527 |
& *HeatCapacity_Cp*recip_horiVertRatio*rhoConst |
528 |
& *drF(kSurface)*hFacC(i,j,kSurface,bi,bj) |
529 |
|
530 |
ENDDO |
531 |
ENDDO |
532 |
|
533 |
#ifdef SEAICE_DEBUG |
534 |
c CALL PLOT_FIELD_XYRS( UWIND,'Current UWIND ', myIter, myThid ) |
535 |
c CALL PLOT_FIELD_XYRS( VWIND,'Current VWIND ', myIter, myThid ) |
536 |
CALL PLOT_FIELD_XYRS( GWATX,'Current GWATX ', myIter, myThid ) |
537 |
CALL PLOT_FIELD_XYRS( GWATY,'Current GWATY ', myIter, myThid ) |
538 |
CML CALL PLOT_FIELD_XYRL( FO,'Current FO ', myIter, myThid ) |
539 |
CML CALL PLOT_FIELD_XYRL( FHEFF,'Current FHEFF ', myIter, myThid ) |
540 |
CALL PLOT_FIELD_XYRL( QSW,'Current QSW ', myIter, myThid ) |
541 |
CALL PLOT_FIELD_XYRL( QNET,'Current QNET ', myIter, myThid ) |
542 |
CALL PLOT_FIELD_XYRL( EmPmR,'Current EmPmR ', myIter, myThid ) |
543 |
CML DO j=1-OLy,sNy+OLy |
544 |
CML DO i=1-OLx,sNx+OLx |
545 |
CML GHEFF(I,J)=SQRT(UICE(I,J,1,bi,bj)**2+VICE(I,J,1,bi,bj)**2) |
546 |
CML GAREA(I,J)=HEFF(I,J,1,bi,bj) |
547 |
CML print*,'I J QNET:',I, J, QNET(i,j,bi,bj), QSW(I,J,bi,bj) |
548 |
CML ENDDO |
549 |
CML ENDDO |
550 |
CML CALL PLOT_FIELD_XYRL( GHEFF,'Current UICE ', myIter, myThid ) |
551 |
CML CALL PLOT_FIELD_XYRL( GAREA,'Current HEFF ', myIter, myThid ) |
552 |
DO j=1-OLy,sNy+OLy |
553 |
DO i=1-OLx,sNx+OLx |
554 |
if(HEFF(i,j,1,bi,bj).gt.1.) then |
555 |
print '(A,2i4,3f10.2)','#### i j heff theta yneg',i,j, |
556 |
& HEFF(i,j,1,bi,bj),theta(I,J,1,bi,bj),yneg(I,J,bi,bj) |
557 |
print '(A,3f10.2)','QSW, QNET before/after correction', |
558 |
& QSW(I,J,bi,bj),QNETI(I,J)*AREA(I,J,2,bi,bj)+ |
559 |
& (ONE-AREA(I,J,2,bi,bj))*QNETO(I,J), QNET(I,J,bi,bj) |
560 |
endif |
561 |
ENDDO |
562 |
ENDDO |
563 |
#endif /* SEAICE_DEBUG */ |
564 |
|
565 |
crg Added by Ralf Giering: do we need DO_WE_NEED_THIS ? |
566 |
#define DO_WE_NEED_THIS |
567 |
C NOW ZERO OUTSIDE POINTS |
568 |
#ifdef ALLOW_AUTODIFF_TAMC |
569 |
CADJ STORE area(:,:,:,bi,bj) = comlev1_bibj, |
570 |
CADJ & key = iicekey, byte = isbyte |
571 |
CADJ STORE heff(:,:,:,bi,bj) = comlev1_bibj, |
572 |
CADJ & key = iicekey, byte = isbyte |
573 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
574 |
DO J=1,sNy |
575 |
DO I=1,sNx |
576 |
C NOW SET AREA(I,J,1,bi,bj)=0 WHERE NO ICE IS |
577 |
AREA(I,J,1,bi,bj)=MIN(AREA(I,J,1,bi,bj) |
578 |
& ,HEFF(I,J,1,bi,bj)/.0001 _d 0) |
579 |
ENDDO |
580 |
ENDDO |
581 |
#ifdef ALLOW_AUTODIFF_TAMC |
582 |
CADJ STORE area(:,:,:,bi,bj) = comlev1_bibj, |
583 |
CADJ & key = iicekey, byte = isbyte |
584 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
585 |
DO J=1,sNy |
586 |
DO I=1,sNx |
587 |
C NOW TRUNCATE AREA |
588 |
#ifdef DO_WE_NEED_THIS |
589 |
AREA(I,J,1,bi,bj)=MIN(ONE,AREA(I,J,1,bi,bj)) |
590 |
ENDDO |
591 |
ENDDO |
592 |
#ifdef ALLOW_AUTODIFF_TAMC |
593 |
CADJ STORE area(:,:,:,bi,bj) = comlev1_bibj, |
594 |
CADJ & key = iicekey, byte = isbyte |
595 |
CADJ STORE hsnow(:,:,bi,bj) = comlev1_bibj, |
596 |
CADJ & key = iicekey, byte = isbyte |
597 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
598 |
DO J=1,sNy |
599 |
DO I=1,sNx |
600 |
AREA(I,J,1,bi,bj) = MAX(ZERO,AREA(I,J,1,bi,bj)) |
601 |
HSNOW(I,J,bi,bj) = MAX(ZERO,HSNOW(I,J,bi,bj)) |
602 |
#endif |
603 |
AREA(I,J,1,bi,bj) = AREA(I,J,1,bi,bj)*HEFFM(I,J,bi,bj) |
604 |
HEFF(I,J,1,bi,bj) = HEFF(I,J,1,bi,bj)*HEFFM(I,J,bi,bj) |
605 |
#ifdef DO_WE_NEED_THIS |
606 |
c HEFF(I,J,1,bi,bj)=MIN(MAX_HEFF,HEFF(I,J,1,bi,bj)) |
607 |
#endif |
608 |
HSNOW(I,J,bi,bj) = HSNOW(I,J,bi,bj)*HEFFM(I,J,bi,bj) |
609 |
ENDDO |
610 |
ENDDO |
611 |
|
612 |
#ifdef ALLOW_SEAICE_FLOODING |
613 |
IF ( SEAICEuseFlooding ) THEN |
614 |
C convert snow to ice if submerged |
615 |
DO J=1,sNy |
616 |
DO I=1,sNx |
617 |
hDraft = (HSNOW(I,J,bi,bj)*330. _d 0 |
618 |
& +HEFF(I,J,1,bi,bj)*SEAICE_rhoIce)/1000. _d 0 |
619 |
hFlood = hDraft - MIN(hDraft,HEFF(I,J,1,bi,bj)) |
620 |
HEFF(I,J,1,bi,bj) = HEFF(I,J,1,bi,bj) + hFlood |
621 |
HSNOW(I,J,bi,bj) = MAX(0. _d 0, |
622 |
& HSNOW(I,J,bi,bj)-hFlood*ICE2SNOW) |
623 |
ENDDO |
624 |
ENDDO |
625 |
ENDIF |
626 |
#endif /* ALLOW_SEAICE_FLOODING */ |
627 |
|
628 |
#ifdef ATMOSPHERIC_LOADING |
629 |
IF ( useRealFreshWaterFlux ) THEN |
630 |
DO J=1,sNy |
631 |
DO I=1,sNx |
632 |
sIceLoad(i,j,bi,bj) = HEFF(I,J,1,bi,bj)*SEAICE_rhoIce |
633 |
& + HSNOW(I,J,bi,bj)* 330. _d 0 |
634 |
ENDDO |
635 |
ENDDO |
636 |
ENDIF |
637 |
#endif |
638 |
|
639 |
ENDDO |
640 |
ENDDO |
641 |
|
642 |
RETURN |
643 |
END |