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C $Header: /u/gcmpack/MITgcm/pkg/seaice/seaice_solve4temp.F,v 1.3 2010/09/26 13:46:28 jmc Exp $ |
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C $Name: $ |
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|
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#include "SEAICE_OPTIONS.h" |
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#define USE_ORIGINAL_SBI |
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|
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CBOP |
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C !ROUTINE: SEAICE_SOLVE4TEMP |
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C !INTERFACE: |
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SUBROUTINE SEAICE_SOLVE4TEMP( |
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I UG, HICE_ACTUAL, HSNOW_ACTUAL, |
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U TSURF, |
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#ifdef SEAICE_ALLOW_TD_IF |
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O F_io_net, F_ia_net, |
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#endif |
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O F_ia, IcePenetSWFlux, |
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I bi, bj, myTime, myIter, myThid ) |
18 |
|
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE SOLVE4TEMP |
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C | o Calculate ice growth rate, surface fluxes and |
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C | temperature of ice surface. |
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C | see Hibler, MWR, 108, 1943-1973, 1980 |
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C *==========================================================* |
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C \ev |
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|
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C !USES: |
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IMPLICIT NONE |
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C === Global variables === |
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#include "SIZE.h" |
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#include "GRID.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "FFIELDS.h" |
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#include "SEAICE.h" |
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#include "SEAICE_PARAMS.h" |
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#ifdef SEAICE_VARIABLE_FREEZING_POINT |
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#include "DYNVARS.h" |
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#endif /* SEAICE_VARIABLE_FREEZING_POINT */ |
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#ifdef ALLOW_EXF |
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# include "EXF_OPTIONS.h" |
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# include "EXF_FIELDS.h" |
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#endif |
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|
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C !INPUT/OUTPUT PARAMETERS |
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C === Routine arguments === |
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C INPUT: |
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C UG :: thermal wind of atmosphere |
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C HICE_ACTUAL :: actual ice thickness |
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C HSNOW_ACTUAL :: actual snow thickness |
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C TSURF :: surface temperature of ice in Kelvin, updated |
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C bi,bj :: loop indices |
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C OUTPUT: |
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C F_io_net :: net upward conductive heat flux through ice at the base of the ice |
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C F_ia_net :: net heat flux divergence at the sea ice/snow surface: |
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C includes ice conductive fluxes and atmospheric fluxes (W/m^2) |
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C F_ia :: upward sea ice/snow surface heat flux to atmosphere (W/m^2) |
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C IcePenetSWFlux :: short wave heat flux under ice |
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_RL UG (1:sNx,1:sNy) |
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_RL HICE_ACTUAL (1:sNx,1:sNy) |
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_RL HSNOW_ACTUAL (1:sNx,1:sNy) |
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_RL TSURF (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL F_io_net (1:sNx,1:sNy) |
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_RL F_ia_net (1:sNx,1:sNy) |
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_RL F_ia (1:sNx,1:sNy) |
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_RL IcePenetSWFlux (1:sNx,1:sNy) |
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INTEGER bi, bj |
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_RL myTime |
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INTEGER myIter, myThid |
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CEOP |
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|
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C !LOCAL VARIABLES: |
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C === Local variables === |
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#ifndef USE_ORIGINAL_SBI |
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_RL F_swi (1:sNx,1:sNy) |
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_RL F_lwd (1:sNx,1:sNy) |
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_RL F_lwu (1:sNx,1:sNy) |
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_RL F_lh (1:sNx,1:sNy) |
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_RL F_sens (1:sNx,1:sNy) |
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#endif /* USE_ORIGINAL_SBI */ |
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_RL F_c (1:sNx,1:sNy) |
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_RL qhice (1:sNx,1:sNy) |
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|
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_RL AbsorbedSWFlux (1:sNx,1:sNy) |
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_RL IcePenetSWFluxFrac (1:sNx,1:sNy) |
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|
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C local copies of global variables |
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_RL tsurfLoc (1:sNx,1:sNy) |
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_RL atempLoc (1:sNx,1:sNy) |
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_RL lwdownLoc (1:sNx,1:sNy) |
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_RL ALB (1:sNx,1:sNy) |
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_RL ALB_ICE (1:sNx,1:sNy) |
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_RL ALB_SNOW (1:sNx,1:sNy) |
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|
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C i, j :: Loop counters |
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C kSrf :: vertical index of surface layer |
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INTEGER i, j |
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#ifdef SEAICE_VARIABLE_FREEZING_POINT |
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INTEGER kSrf |
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#endif /* SEAICE_VARIABLE_FREEZING_POINT */ |
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INTEGER ITER |
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|
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_RL TB, D1, D1I, D3 |
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_RL TMELT, XKI, XKS, HCUT, XIO |
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_RL SurfMeltTemp |
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|
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C Constants to calculate Saturation Vapor Pressure |
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#ifdef USE_ORIGINAL_SBI |
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_RL TMELTP, C1, C2, C3, C4, C5, QS1 |
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_RL A2 (1:sNx,1:sNy) |
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_RL A3 (1:sNx,1:sNy) |
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c _RL B (1:sNx,1:sNy) |
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_RL A1 (1:sNx,1:sNy) |
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#else /* USE_ORIGINAL_SBI */ |
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_RL dFiDTs1 |
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_RL aa1,aa2,bb1,bb2,Ppascals,cc0,cc1,cc2,cc3t |
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C specific humidity at ice surface variables |
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_RL mm_pi,mm_log10pi,dqhice_dTice |
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#endif /* USE_ORIGINAL_SBI */ |
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|
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C effective conductivity of combined ice and snow |
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_RL effConduct |
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|
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C powers of temperature |
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_RL t1, t2, t3, t4 |
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_RL TEN |
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|
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TEN = 10.0 _d 0 |
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#ifdef USE_ORIGINAL_SBI |
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C MAYKUTS CONSTANTS FOR SAT. VAP. PRESSURE TEMP. POLYNOMIAL |
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C1=2.7798202 _d -06 |
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C2=-2.6913393 _d -03 |
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C3=0.97920849 _d +00 |
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C4=-158.63779 _d +00 |
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C5=9653.1925 _d +00 |
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|
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QS1=0.622 _d +00/1013.0 _d +00 |
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|
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#else /* USE_ORIGINAL_SBI */ |
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aa1 = 2663.5 _d 0 |
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aa2 = 12.537 _d 0 |
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bb1 = 0.622 _d 0 |
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bb2 = ONE - bb1 |
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Ppascals = 100000. _d 0 |
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cc0 = TEN ** aa2 |
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cc1 = cc0*aa1*bb1*Ppascals*log(10. _d 0) |
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cc2 = cc0*bb2 |
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#endif /* USE_ORIGINAL_SBI */ |
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|
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C FREEZING TEMPERATURE OF SEAWATER |
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C Use a constant freezing temperature (SEAICE_VARIABLE_FREEZING_POINT undef) |
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#ifdef USE_ORIGINAL_SBI |
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TB=271.2 _d 0 |
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#else /* USE_ORIGINAL_SBI */ |
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TB = celsius2K + SEAICE_freeze |
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#endif /* USE_ORIGINAL_SBI */ |
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#ifdef SEAICE_VARIABLE_FREEZING_POINT |
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kSrf = 1 |
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#endif /* SEAICE_VARIABLE_FREEZING_POINT */ |
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|
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C SENSIBLE HEAT CONSTANT |
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D1=SEAICE_sensHeat |
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|
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C ICE LATENT HEAT CONSTANT |
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D1I=SEAICE_latentIce |
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|
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C STEFAN BOLTZMAN CONSTANT TIMES 0.97 EMISSIVITY |
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D3=SEAICE_emissivity |
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|
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C MELTING TEMPERATURE OF ICE |
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#ifdef USE_ORIGINAL_SBI |
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TMELT=273.16 _d +00 |
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TMELTP=273.159 _d +00 |
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SurfMeltTemp = TMELTP |
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#else /* USE_ORIGINAL_SBI */ |
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TMELT = celsius2K |
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SurfMeltTemp = TMELT |
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#endif /* USE_ORIGINAL_SBI */ |
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|
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C ICE CONDUCTIVITY |
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XKI=SEAICE_iceConduct |
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|
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C SNOW CONDUCTIVITY |
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XKS=SEAICE_snowConduct |
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|
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C CUTOFF SNOW THICKNESS |
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HCUT=SEAICE_snowThick |
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|
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C PENETRATION SHORTWAVE RADIATION FACTOR |
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XIO=SEAICE_shortwave |
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|
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C Initialize variables |
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DO J=1,sNy |
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DO I=1,sNx |
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IcePenetSWFlux (I,J) = 0. _d 0 |
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IcePenetSWFluxFrac (I,J) = 0. _d 0 |
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AbsorbedSWFlux (I,J) = 0. _d 0 |
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|
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qhice (I,J) = 0. _d 0 |
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F_ia (I,J) = 0. _d 0 |
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|
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F_io_net (I,J) = 0. _d 0 |
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F_ia_net (I,J) = 0. _d 0 |
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|
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C Reset the snow/ice surface to TMELT and bound the atmospheric temperature |
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#ifdef USE_ORIGINAL_SBI |
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tsurfLoc (I,J) = MIN(273.16 _d 0+MAX_TICE,TSURF(I,J,bi,bj)) |
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atempLoc (I,J) = MAX(273.16 _d 0+MIN_ATEMP,ATEMP(I,J,bi,bj)) |
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A1(I,J) = ZERO |
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A2(I,J) = ZERO |
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A3(I,J) = ZERO |
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c B(I,J) = ZERO |
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lwdownLoc(I,J) = MAX(MIN_LWDOWN,LWDOWN(I,J,bi,bj)) |
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#else /* USE_ORIGINAL_SBI */ |
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F_swi (I,J) = 0. _d 0 |
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F_lwd (I,J) = 0. _d 0 |
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F_lwu (I,J) = 0. _d 0 |
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F_lh (I,J) = 0. _d 0 |
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F_sens (I,J) = 0. _d 0 |
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|
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tsurfLoc(I,J) = TSURF(I,J,bi,bj) |
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atempLoc (I,J) = MAX(TMELT + MIN_ATEMP,ATEMP(I,J,bi,bj)) |
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lwdownLoc(I,J) = LWDOWN(I,J,bi,bj) |
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#endif /* USE_ORIGINAL_SBI */ |
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|
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ENDDO |
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ENDDO |
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|
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DO J=1,sNy |
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DO I=1,sNx |
232 |
|
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C DECIDE ON ALBEDO |
234 |
IF (HICE_ACTUAL(I,J) .GT. ZERO) THEN |
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|
236 |
IF ( YC(I,J,bi,bj) .LT. ZERO ) THEN |
237 |
IF (tsurfLoc(I,J) .GE. SurfMeltTemp) THEN |
238 |
ALB_ICE (I,J) = SEAICE_wetIceAlb_south |
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ALB_SNOW(I,J) = SEAICE_wetSnowAlb_south |
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ELSE ! no surface melting |
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ALB_ICE (I,J) = SEAICE_dryIceAlb_south |
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ALB_SNOW(I,J) = SEAICE_drySnowAlb_south |
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ENDIF |
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ELSE !/ Northern Hemisphere |
245 |
IF (tsurfLoc(I,J) .GE. SurfMeltTemp) THEN |
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ALB_ICE (I,J) = SEAICE_wetIceAlb |
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ALB_SNOW(I,J) = SEAICE_wetSnowAlb |
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ELSE ! no surface melting |
249 |
ALB_ICE (I,J) = SEAICE_dryIceAlb |
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ALB_SNOW(I,J) = SEAICE_drySnowAlb |
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ENDIF |
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ENDIF !/ Albedo for snow and ice |
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|
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#ifdef USE_ORIGINAL_SBI |
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C If actual snow thickness exceeds the cutoff thickness, use the |
256 |
C snow albedo |
257 |
IF (HSNOW_ACTUAL(I,J) .GT. HCUT) THEN |
258 |
ALB(I,J) = ALB_SNOW(I,J) |
259 |
|
260 |
C otherwise, use some combination of ice and snow albedo |
261 |
C (What is the source of this formulation ?) |
262 |
ELSE |
263 |
ALB(I,J) = MIN(ALB_ICE(I,J) + HSNOW_ACTUAL(I,J)/HCUT* |
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& (ALB_SNOW(I,J) -ALB_ICE(I,J)), |
265 |
& ALB_SNOW(I,J)) |
266 |
ENDIF |
267 |
|
268 |
#else /* USE_ORIGINAL_SBI */ |
269 |
IF (HSNOW_ACTUAL(I,J) .GT. ZERO) THEN |
270 |
ALB(I,J) = ALB_SNOW(I,J) |
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ELSE |
272 |
ALB(I,J) = ALB_ICE(I,J) |
273 |
ENDIF |
274 |
#endif /* USE_ORIGINAL_SBI */ |
275 |
|
276 |
#ifdef USE_ORIGINAL_SBI |
277 |
C NOW DETERMINE FIXED FORCING TERM IN HEAT BUDGET |
278 |
|
279 |
#ifdef ALLOW_DOWNWARD_RADIATION |
280 |
IF(HSNOW_ACTUAL(I,J).GT.0.0) THEN |
281 |
C NO SW PENETRATION WITH SNOW |
282 |
A1(I,J)=(ONE-ALB(I,J))*SWDOWN(I,J,bi,bj) |
283 |
& +lwdownLoc(I,J)*0.97 _d 0 |
284 |
& +D1*UG(I,J)*atempLoc(I,J)+D1I*UG(I,J)*AQH(I,J,bi,bj) |
285 |
ELSE |
286 |
C SW PENETRATION UNDER ICE |
287 |
A1(I,J)=(ONE-ALB(I,J))*SWDOWN(I,J,bi,bj) |
288 |
& *(ONE-XIO*EXP(-1.5 _d 0*HICE_ACTUAL(I,J))) |
289 |
& +lwdownLoc(I,J)*0.97 _d 0 |
290 |
& +D1*UG(I,J)*atempLoc(I,J)+D1I*UG(I,J)*AQH(I,J,bi,bj) |
291 |
ENDIF |
292 |
#endif /* ALLOW_DOWNWARD_RADIATION */ |
293 |
|
294 |
#else /* USE_ORIGINAL_SBI */ |
295 |
|
296 |
C The longwave radiative flux convergence |
297 |
F_lwd(I,J) = - 0.97 _d 0 * lwdownLoc(I,J) |
298 |
|
299 |
C Determine the fraction of shortwave radiative flux |
300 |
C remaining after scattering through the snow and ice at |
301 |
C the ocean interface. If snow is present, no radiation |
302 |
C penetrates to the ocean. |
303 |
IF (HSNOW_ACTUAL(I,J) .GT. ZERO) THEN |
304 |
IcePenetSWFluxFrac(I,J) = ZERO |
305 |
ELSE |
306 |
IcePenetSWFluxFrac(I,J) = |
307 |
& XIO*EXP(-1.5 _d 0 * HICE_ACTUAL(I,J)) |
308 |
ENDIF |
309 |
|
310 |
C The shortwave radiative flux convergence in the |
311 |
C seaice. |
312 |
AbsorbedSWFlux(I,J) = -(ONE - ALB(I,J))* |
313 |
& (ONE - IcePenetSWFluxFrac(I,J)) |
314 |
& *SWDOWN(I,J,bi,bj) |
315 |
|
316 |
C The shortwave radiative flux convergence in the |
317 |
C ocean beneath ice. |
318 |
IcePenetSWFlux(I,J) = -(ONE - ALB(I,J))* |
319 |
& IcePenetSWFluxFrac(I,J) |
320 |
& *SWDOWN(I,J,bi,bj) |
321 |
|
322 |
F_swi(I,J) = AbsorbedSWFlux(I,J) |
323 |
|
324 |
C Set a mininum sea ice thickness of 5 cm to bound |
325 |
C the magnitude of conductive heat fluxes. |
326 |
HICE_ACTUAL(I,J) = max(HICE_ACTUAL(I,J),5. _d -2) |
327 |
|
328 |
#endif /* USE_ORIGINAL_SBI */ |
329 |
|
330 |
#ifdef SEAICE_VARIABLE_FREEZING_POINT |
331 |
C Use a variable seawater freezing point |
332 |
TB = -0.0575 _d 0*salt(I,J,kSrf,bi,bj) + 0.0901 _d 0 |
333 |
& + celsius2K |
334 |
#endif /* SEAICE_VARIABLE_FREEZING_POINT */ |
335 |
|
336 |
C The effective conductivity of the two-layer |
337 |
C snow/ice system. |
338 |
#ifdef USE_ORIGINAL_SBI |
339 |
effConduct= |
340 |
& XKS/(HSNOW_ACTUAL(I,J)/HICE_ACTUAL(I,J) + |
341 |
& XKS/XKI)/HICE_ACTUAL(I,J) |
342 |
#else /* USE_ORIGINAL_SBI */ |
343 |
effConduct = XKI * XKS / |
344 |
& (XKS * HICE_ACTUAL(I,J) + XKI * HSNOW_ACTUAL(I,J)) |
345 |
#endif /* USE_ORIGINAL_SBI */ |
346 |
|
347 |
#ifdef SEAICE_DEBUG |
348 |
IF ( (I .EQ. SEAICE_debugPointX) .and. |
349 |
& (J .EQ. SEAICE_debugPointY) ) THEN |
350 |
|
351 |
print '(A,i6)','-----------------------------------' |
352 |
print '(A,i6)','ibi merged initialization ', myIter |
353 |
|
354 |
print '(A,i6,4(1x,D24.15))', |
355 |
& 'ibi iter, TSL, TS ',myIter, |
356 |
& tsurfLoc(I,J), TSURF(I,J,bi,bj) |
357 |
|
358 |
print '(A,i6,4(1x,D24.15))', |
359 |
& 'ibi iter, TMELT ',myIter,TMELT |
360 |
|
361 |
print '(A,i6,4(1x,D24.15))', |
362 |
& 'ibi iter, HIA, EFKCON ',myIter, |
363 |
& HICE_ACTUAL(I,J), effConduct |
364 |
|
365 |
print '(A,i6,4(1x,D24.15))', |
366 |
& 'ibi iter, HSNOW ',myIter, |
367 |
& HSNOW_ACTUAL(I,J), ALB(I,J) |
368 |
|
369 |
print '(A,i6)','-----------------------------------' |
370 |
print '(A,i6)','ibi energy balance iterat ', myIter |
371 |
|
372 |
ENDIF |
373 |
#endif /* SEAICE_DEBUG */ |
374 |
|
375 |
Ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc |
376 |
DO ITER=1,IMAX_TICE |
377 |
|
378 |
t1 = tsurfLoc(I,J) |
379 |
t2 = t1*t1 |
380 |
t3 = t2*t1 |
381 |
t4 = t2*t2 |
382 |
|
383 |
C Calculate the specific humidity in the BL above the snow/ice |
384 |
#ifdef USE_ORIGINAL_SBI |
385 |
C Use the Maykut polynomial |
386 |
qhice(I,J)=QS1*(C1*t4+C2*t3 +C3*t2+C4*t1+C5) |
387 |
|
388 |
#else /* USE_ORIGINAL_SBI */ |
389 |
C Use an approximation which is more accurate at low temperatures |
390 |
|
391 |
C log 10 of the sat vap pressure |
392 |
mm_log10pi = -aa1 / t1 + aa2 |
393 |
|
394 |
C The saturation vapor pressure (SVP) in the surface |
395 |
C boundary layer (BL) above the snow/ice. |
396 |
mm_pi = TEN **(mm_log10pi) |
397 |
|
398 |
qhice(I,J) = bb1*mm_pi / (Ppascals - (ONE - bb1) * |
399 |
& mm_pi) |
400 |
#endif /* USE_ORIGINAL_SBI */ |
401 |
|
402 |
C Caclulate the flux terms based on the updated tsurfLoc |
403 |
#ifdef USE_ORIGINAL_SBI |
404 |
A2(I,J)=-D1*UG(I,J)*t1-D1I*UG(I,J)*qhice(I,J)-D3*t4 |
405 |
A3(I,J) = 4.0 _d 0 * D3 * t3 + effConduct + D1*UG(I,J) |
406 |
F_c(I,J)=-effConduct*(TB-tsurfLoc(I,J)) |
407 |
#else /* USE_ORIGINAL_SBI */ |
408 |
C A constant for SVP derivative w.r.t TICE |
409 |
cc3t = TEN **(aa1 / t1) |
410 |
|
411 |
c d(qh)/d(TICE) |
412 |
dqhice_dTice = cc1*cc3t/((cc2-cc3t*Ppascals)**TWO *t2) |
413 |
|
414 |
c d(F_ia)/d(TICE) |
415 |
dFiDTs1 = 4.0 _d 0 * D3*t3 + effConduct + D1*UG(I,J) |
416 |
& + D1I*UG(I,J)*dqhice_dTice |
417 |
|
418 |
F_lh(I,J) = D1I*UG(I,J)*(qhice(I,J)-AQH(I,J,bi,bj)) |
419 |
|
420 |
F_c(I,J) = -effConduct * (TB - t1) |
421 |
|
422 |
F_lwu(I,J)= t4 * D3 |
423 |
|
424 |
F_sens(I,J)= D1 * UG(I,J) * (t1 - atempLoc(I,J)) |
425 |
|
426 |
F_ia(I,J) = F_lwd(I,J) + F_swi(I,J) + F_lwu(I,J) + |
427 |
& F_c(I,J) + F_sens(I,J) + F_lh(I,J) |
428 |
|
429 |
#endif /* USE_ORIGINAL_SBI */ |
430 |
|
431 |
#ifdef SEAICE_DEBUG |
432 |
IF ( (I .EQ. SEAICE_debugPointX) .and. |
433 |
& (J .EQ. SEAICE_debugPointY) ) THEN |
434 |
print '(A,i6,4(1x,D24.15))', |
435 |
& 'ice-iter qhICE, ', ITER,qhIce(I,J) |
436 |
|
437 |
#ifdef USE_ORIGINAL_SBI |
438 |
print '(A,i6,4(1x,D24.15))', |
439 |
& 'ice-iter A1 A2 B ', ITER,A1(I,J), A2(I,J), |
440 |
& -F_c(I,J) |
441 |
|
442 |
print '(A,i6,4(1x,D24.15))', |
443 |
& 'ice-iter A3 (-A1+A2) ', ITER, A3(I,J), |
444 |
& -(A1(I,J) + A2(I,J)) |
445 |
#else /* USE_ORIGINAL_SBI */ |
446 |
|
447 |
print '(A,i6,4(1x,D24.15))', |
448 |
& 'ice-iter dFiDTs1 F_ia ', ITER, dFiDTs1, |
449 |
& F_ia(I,J) |
450 |
#endif /* USE_ORIGINAL_SBI */ |
451 |
|
452 |
ENDIF |
453 |
#endif /* SEAICE_DEBUG */ |
454 |
|
455 |
C Update tsurfLoc |
456 |
#ifdef USE_ORIGINAL_SBI |
457 |
tsurfLoc(I,J)=tsurfLoc(I,J) |
458 |
& +(A1(I,J)+A2(I,J)-F_c(I,J))/A3(I,J) |
459 |
|
460 |
tsurfLoc(I,J) =MAX(273.16 _d 0+MIN_TICE,tsurfLoc(I,J)) |
461 |
tsurfLoc(I,J) =MIN(tsurfLoc(I,J),TMELT) |
462 |
|
463 |
#else /* USE_ORIGINAL_SBI */ |
464 |
tsurfLoc(I,J) = tsurfLoc(I,J) - F_ia(I,J) / dFiDTs1 |
465 |
|
466 |
C If the search leads to tsurfLoc < 50 Kelvin, |
467 |
C restart the search at tsurfLoc = TMELT. Note that one |
468 |
C solution to the energy balance problem is an |
469 |
C extremely low temperature - a temperature far below |
470 |
C realistic values. |
471 |
|
472 |
IF (tsurfLoc(I,J) .LT. 50.0 _d 0 ) THEN |
473 |
tsurfLoc(I,J) = TMELT |
474 |
ENDIF |
475 |
#endif /* USE_ORIGINAL_SBI */ |
476 |
|
477 |
#ifdef SEAICE_DEBUG |
478 |
IF ( (I .EQ. SEAICE_debugPointX) .and. |
479 |
& (J .EQ. SEAICE_debugPointY) ) THEN |
480 |
|
481 |
print '(A,i6,4(1x,D24.15))', |
482 |
& 'ice-iter tsurfLc,|dif|', ITER, |
483 |
& tsurfLoc(I,J), |
484 |
& log10(abs(tsurfLoc(I,J) - t1)) |
485 |
ENDIF |
486 |
#endif /* SEAICE_DEBUG */ |
487 |
|
488 |
ENDDO !/* Iterations */ |
489 |
Ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc |
490 |
|
491 |
C Finalize the flux terms |
492 |
#ifdef USE_ORIGINAL_SBI |
493 |
F_ia(I,J)=-A1(I,J)-A2(I,J) |
494 |
TSURF(I,J,bi,bj)=MIN(tsurfLoc(I,J),TMELT) |
495 |
|
496 |
IF (HSNOW_ACTUAL(I,J) .GT. ZERO ) THEN |
497 |
C NO SW PENETRATION WITH SNOW |
498 |
IcePenetSWFlux(I,J)=ZERO |
499 |
ELSE |
500 |
C SW PENETRATION UNDER ICE |
501 |
|
502 |
#ifdef ALLOW_DOWNWARD_RADIATION |
503 |
IcePenetSWFlux(I,J)=-(ONE-ALB(I,J))*SWDOWN(I,J,bi,bj) |
504 |
& *XIO*EXP(-1.5 _d 0*HICE_ACTUAL(I,J)) |
505 |
#endif /* ALLOW_DOWNWARD_RADIATION */ |
506 |
ENDIF |
507 |
|
508 |
#else /* USE_ORIGINAL_SBI */ |
509 |
tsurfLoc(I,J) = MIN(tsurfLoc(I,J),TMELT) |
510 |
TSURF(I,J,bi,bj) = tsurfLoc(I,J) |
511 |
|
512 |
C Recalculate the fluxes based on the (possibly) adjusted TSURF |
513 |
t1 = tsurfLoc(I,J) |
514 |
t2 = t1*t1 |
515 |
t3 = t2*t1 |
516 |
t4 = t2*t2 |
517 |
|
518 |
C log 10 of the sat vap pressure |
519 |
mm_log10pi = -aa1 / t1 + aa2 |
520 |
|
521 |
C saturation vapor pressure |
522 |
mm_pi = TEN **(mm_log10pi) |
523 |
|
524 |
C over ice specific humidity |
525 |
qhice(I,J) = bb1*mm_pi/(Ppascals- (ONE - bb1) * mm_pi) |
526 |
|
527 |
F_lh(I,J) = D1I * UG(I,J)*(qhice(I,J)-AQH(I,J,bi,bj)) |
528 |
F_c(I,J) = -effConduct * (TB - t1) |
529 |
F_lwu(I,J) = t4 * D3 |
530 |
F_sens(I,J) = D1 * UG(I,J) * (t1 - atempLoc(I,J)) |
531 |
|
532 |
C The flux between the ice/snow surface and the atmosphere. |
533 |
C (excludes upward conductive fluxes) |
534 |
F_ia(I,J) = F_lwd(I,J) + F_swi(I,J) + F_lwu(I,J) + |
535 |
& F_sens(I,J) + F_lh(I,J) |
536 |
#endif /* USE_ORIGINAL_SBI */ |
537 |
|
538 |
C Caclulate the net ice-ocean and ice-atmosphere fluxes |
539 |
IF (F_c(I,J) .LT. ZERO) THEN |
540 |
F_io_net(I,J) = -F_c(I,J) |
541 |
F_ia_net(I,J) = ZERO |
542 |
ELSE |
543 |
F_io_net(I,J) = ZERO |
544 |
F_ia_net(I,J) = F_ia(I,J) |
545 |
ENDIF !/* conductive fluxes up or down */ |
546 |
|
547 |
#ifdef SEAICE_DEBUG |
548 |
IF ( (I .EQ. SEAICE_debugPointX) .and. |
549 |
& (J .EQ. SEAICE_debugPointY) ) THEN |
550 |
|
551 |
print '(A)','----------------------------------------' |
552 |
print '(A,i6)','ibi complete ', myIter |
553 |
|
554 |
print '(A,4(1x,D24.15))', |
555 |
& 'ibi T(SURF, surfLoc,atmos) ', |
556 |
& TSURF(I,J,bi,bj), tsurfLoc(I,J),atempLoc(I,J) |
557 |
|
558 |
print '(A,4(1x,D24.15))', |
559 |
& 'ibi LWL ', lwdownLoc(I,J) |
560 |
|
561 |
print '(A,4(1x,D24.15))', |
562 |
& 'ibi QSW(Total, Penetrating)', |
563 |
& SWDOWN(I,J,bi,bj), IcePenetSWFlux(I,J) |
564 |
|
565 |
print '(A,4(1x,D24.15))', |
566 |
& 'ibi qh(ATM ICE) ', |
567 |
& AQH(I,J,bi,bj),qhice(I,J) |
568 |
|
569 |
c print '(A,4(1x,D24.15))', |
570 |
c & 'ibi F(lwd,swi,lwu) ', |
571 |
c & F_lwd(I,J), F_swi(I,J), F_lwu(I,J) |
572 |
|
573 |
c print '(A,4(1x,D24.15))', |
574 |
c & 'ibi F(c,lh,sens) ', |
575 |
c & F_c(I,J), F_lh(I,J), F_sens(I,J) |
576 |
|
577 |
print '(A,4(1x,D24.15))', |
578 |
& 'ibi F_ia, F_ia_net, F_c ', |
579 |
#ifdef USE_ORIGINAL_SBI |
580 |
& -(A1(I,J)+A2(I,J)), |
581 |
& -(A1(I,J)+A2(I,J)-F_c(I,J)), |
582 |
& F_c(I,J) |
583 |
#else /* USE_ORIGINAL_SBI */ |
584 |
& F_ia(I,J), |
585 |
& F_ia_net(I,J), |
586 |
& F_c(I,J) |
587 |
#endif /* USE_ORIGINAL_SBI */ |
588 |
|
589 |
print '(A)','----------------------------------------' |
590 |
|
591 |
ENDIF |
592 |
#endif /* SEAICE_DEBUG */ |
593 |
|
594 |
ENDIF !/* HICE_ACTUAL > 0 */ |
595 |
|
596 |
ENDDO !/* i */ |
597 |
ENDDO !/* j */ |
598 |
|
599 |
RETURN |
600 |
END |