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C $Header: /u/gcmpack/MITgcm/pkg/seaice/seaice_solve4temp.F,v 1.32 2012/02/15 00:47:33 jmc Exp $ |
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C $Name: $ |
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|
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#include "SEAICE_OPTIONS.h" |
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#ifdef ALLOW_EXF |
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# include "EXF_OPTIONS.h" |
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#endif |
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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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#ifdef SEAICE_CAP_SUBLIM |
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I F_lh_max, |
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#endif |
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U TSURF, |
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O F_ia, IcePenetSW, |
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O FWsublim, |
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I bi, bj, myTime, myIter, myThid ) |
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|
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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_SIZE.h" |
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#include "SEAICE_PARAMS.h" |
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#include "SEAICE.h" |
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#include "DYNVARS.h" |
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#ifdef ALLOW_EXF |
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# include "EXF_FIELDS.h" |
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#endif |
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#ifdef ALLOW_AUTODIFF_TAMC |
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# include "tamc.h" |
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#endif |
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|
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C !INPUT PARAMETERS: |
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C UG :: atmospheric wind speed (m/s) |
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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/snow in Kelvin |
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C bi,bj :: tile indices |
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C myTime :: current time in simulation |
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C myIter :: iteration number in simulation |
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C myThid :: my Thread Id number |
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C !OUTPUT PARAMETERS: |
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C TSURF :: updated surface temperature of ice/snow in Kelvin |
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C F_ia :: upward seaice/snow surface heat flux to atmosphere (W/m^2) |
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C IcePenetSW :: short wave heat flux transmitted through ice (+=upward) |
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C FWsublim :: fresh water (mass) flux due to sublimation (+=up)(kg/m^2/s) |
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C---- Notes: |
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C 1) should add IcePenetSW to F_ia to get the net surface heat flux |
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C from the atmosphere (IcePenetSW not currently included in F_ia) |
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C 2) since zero ice/snow heat capacity is assumed, all the absorbed Short |
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C -Wave is used to warm the ice/snow surface (heating profile ignored). |
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C---------- |
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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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#ifdef SEAICE_CAP_SUBLIM |
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_RL F_lh_max (1:sNx,1:sNy) |
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#endif |
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_RL TSURF (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL F_ia (1:sNx,1:sNy) |
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_RL IcePenetSW (1:sNx,1:sNy) |
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_RL FWsublim (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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#if defined(ALLOW_ATM_TEMP) && defined(ALLOW_DOWNWARD_RADIATION) |
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C !LOCAL VARIABLES: |
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C === Local variables === |
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C i, j :: Loop counters |
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C kSurface :: vertical index of surface layer |
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INTEGER i, j |
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INTEGER kSurface |
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INTEGER ITER |
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C tempFrz :: ocean temperature in contact with ice (=seawater freezing point) (K) |
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_RL tempFrz (1:sNx,1:sNy) |
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_RL D1, D1I |
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_RL D3(1:sNx,1:sNy) |
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_RL TMELT, XKI, XKS, HCUT, recip_HCUT, XIO |
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C SurfMeltTemp :: Temp (K) above which wet-albedo values are used |
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_RL SurfMeltTemp |
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C effConduct :: effective conductivity of combined ice and snow |
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_RL effConduct(1:sNx,1:sNy) |
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C lhSublim :: latent heat of sublimation (SEAICE_lhEvap + SEAICE_lhFusion) |
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_RL lhSublim |
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C t1,t2,t3,t4 :: powers of temperature |
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_RL t1, t2, t3, t4 |
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|
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C- Constants to calculate Saturation Vapor Pressure |
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C Maykut Polynomial Coeff. for Sat. Vapor Press |
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_RL C1, C2, C3, C4, C5, QS1 |
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C Extended temp-range expon. relation Coeff. for Sat. Vapor Press |
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_RL lnTEN |
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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 |
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|
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C F_c :: conductive heat flux through seaice+snow (+=upward) |
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C F_lwu :: upward long-wave surface heat flux (+=upward) |
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C F_sens :: sensible surface heat flux (+=upward) |
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C F_lh :: latent heat flux (sublimation) (+=upward) |
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C qhice :: saturation vapor pressure of snow/ice surface |
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C dqh_dTs :: derivative of qhice w.r.t snow/ice surf. temp |
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C dFia_dTs :: derivative of surf heat flux (F_ia) w.r.t surf. temp |
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_RL F_c (1:sNx,1:sNy) |
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_RL F_lwu (1:sNx,1:sNy) |
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_RL F_sens (1:sNx,1:sNy) |
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_RL F_lh (1:sNx,1:sNy) |
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_RL qhice (1:sNx,1:sNy) |
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_RL dqh_dTs (1:sNx,1:sNy) |
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_RL dFia_dTs (1:sNx,1:sNy) |
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_RL absorbedSW (1:sNx,1:sNy) |
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_RL penetSWFrac |
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_RL delTsurf |
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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 tsurfPrev (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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C iceOrNot :: this is HICE_ACTUAL.GT.0. |
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LOGICAL iceOrNot(1:sNx,1:sNy) |
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#ifdef SEAICE_DEBUG |
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C F_io_net :: upward conductive heat flux through seaice+snow |
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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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_RL F_io_net |
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_RL F_ia_net |
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#endif /* SEAICE_DEBUG */ |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ INIT comlev1_solve4temp = COMMON, sNx*sNy*NMAX_TICE |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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|
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C- MAYKUT 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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QS1=0.622 _d +00/1013.0 _d +00 |
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C- Extended temp-range expon. relation Coeff. for Sat. Vapor Press |
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lnTEN = LOG(10.0 _d 0) |
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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 = 1.0 _d 0 - bb1 |
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Ppascals = 100000. _d 0 |
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C cc0 = TEN ** aa2 |
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cc0 = EXP(aa2*lnTEN) |
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cc1 = cc0*aa1*bb1*Ppascals*lnTEN |
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cc2 = cc0*bb2 |
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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 SENSIBLE HEAT CONSTANT |
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D1=SEAICE_dalton*SEAICE_cpAir*SEAICE_rhoAir |
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|
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C ICE LATENT HEAT CONSTANT |
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lhSublim = SEAICE_lhEvap + SEAICE_lhFusion |
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D1I=SEAICE_dalton*lhSublim*SEAICE_rhoAir |
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|
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C MELTING TEMPERATURE OF ICE |
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TMELT = celsius2K |
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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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C Snow-Thickness above HCUT: SW optically thick snow (=> snow-albedo). |
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C Snow-Thickness below HCUT: linear transition to ice-albedo |
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HCUT = SEAICE_snowThick |
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recip_HCUT = 0. _d 0 |
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IF ( HCUT.GT.0. _d 0 ) recip_HCUT = 1. _d 0 / HCUT |
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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 Temperature Threshold for wet-albedo: |
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SurfMeltTemp = TMELT + SEAICE_wetAlbTemp |
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C old SOLVE4TEMP_LEGACY setting, consistent with former celsius2K value: |
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c TMELT = 273.16 _d +00 |
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c SurfMeltTemp = 273.159 _d +00 |
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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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C HICE_ACTUAL is modified in this routine, but at the same time |
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C used to decided where there is ice, therefore we save this information |
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C here in a separate array |
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iceOrNot (I,J) = HICE_ACTUAL(I,J) .GT. 0. _d 0 |
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IcePenetSW(I,J) = 0. _d 0 |
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absorbedSW(I,J) = 0. _d 0 |
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qhice (I,J) = 0. _d 0 |
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dqh_dTs (I,J) = 0. _d 0 |
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F_ia (I,J) = 0. _d 0 |
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F_lh (I,J) = 0. _d 0 |
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F_lwu (I,J) = 0. _d 0 |
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F_sens (I,J) = 0. _d 0 |
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C Make a local copy of LW, surface & atmospheric temperatures |
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tsurfLoc (I,J) = TSURF(I,J,bi,bj) |
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c tsurfLoc (I,J) = MIN( celsius2K+MAX_TICE, TSURF(I,J,bi,bj) ) |
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lwdownLoc(I,J) = MAX( MIN_LWDOWN, LWDOWN(I,J,bi,bj) ) |
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atempLoc (I,J) = MAX( celsius2K+MIN_ATEMP, ATEMP(I,J,bi,bj) ) |
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|
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c FREEZING TEMP. OF SEA WATER (K) |
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tempFrz(I,J) = SEAICE_dTempFrz_dS *salt(I,J,kSurface,bi,bj) |
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& + SEAICE_tempFrz0 + celsius2K |
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|
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C Now determine fixed (relative to tsurf) forcing term in heat budget |
241 |
|
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IF(HSNOW_ACTUAL(I,J).GT.0.0) THEN |
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C Stefan-Boltzmann constant times emissivity |
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D3(I,J)=SEAICE_snow_emiss*SEAICE_boltzmann |
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#ifdef EXF_LWDOWN_WITH_EMISSIVITY |
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C This is now [(1-emiss)*lwdown - lwdown] |
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lwdownLoc(I,J) = SEAICE_snow_emiss*lwdownLoc(I,J) |
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#else /* use the old hard wired inconsistent value */ |
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lwdownLoc(I,J) = 0.97 _d 0*lwdownLoc(I,J) |
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#endif /* EXF_LWDOWN_WITH_EMISSIVITY */ |
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ELSE |
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C Stefan-Boltzmann constant times emissivity |
253 |
D3(I,J)=SEAICE_ice_emiss*SEAICE_boltzmann |
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#ifdef EXF_LWDOWN_WITH_EMISSIVITY |
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C This is now [(1-emiss)*lwdown - lwdown] |
256 |
lwdownLoc(I,J) = SEAICE_ice_emiss*lwdownLoc(I,J) |
257 |
#else /* use the old hard wired inconsistent value */ |
258 |
lwdownLoc(I,J) = 0.97 _d 0*lwdownLoc(I,J) |
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#endif /* EXF_LWDOWN_WITH_EMISSIVITY */ |
260 |
ENDIF |
261 |
ENDDO |
262 |
ENDDO |
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|
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DO J=1,sNy |
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DO I=1,sNx |
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|
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C DECIDE ON ALBEDO |
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IF ( iceOrNot(I,J) ) THEN |
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|
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IF ( YC(I,J,bi,bj) .LT. 0.0 _d 0 ) THEN |
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IF (tsurfLoc(I,J) .GE. SurfMeltTemp) THEN |
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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 |
279 |
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 |
283 |
ALB_ICE (I,J) = SEAICE_dryIceAlb |
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ALB_SNOW(I,J) = SEAICE_drySnowAlb |
285 |
ENDIF |
286 |
ENDIF !/ Albedo for snow and ice |
287 |
|
288 |
C If actual snow thickness exceeds the cutoff thickness, use snow albedo |
289 |
IF (HSNOW_ACTUAL(I,J) .GT. HCUT) THEN |
290 |
ALB(I,J) = ALB_SNOW(I,J) |
291 |
ELSEIF ( HCUT.LE.ZERO ) THEN |
292 |
ALB(I,J) = ALB_ICE(I,J) |
293 |
ELSE |
294 |
C otherwise, use linear transition between ice and snow albedo |
295 |
ALB(I,J) = MIN( ALB_ICE(I,J) + HSNOW_ACTUAL(I,J)*recip_HCUT |
296 |
& *(ALB_SNOW(I,J) -ALB_ICE(I,J)) |
297 |
& , ALB_SNOW(I,J) ) |
298 |
ENDIF |
299 |
|
300 |
C Determine the fraction of shortwave radiative flux remaining |
301 |
C at ocean interface after scattering through the snow and ice. |
302 |
C If snow is present, no radiation penetrates through snow+ice |
303 |
IF (HSNOW_ACTUAL(I,J) .GT. 0.0 _d 0) THEN |
304 |
penetSWFrac = 0.0 _d 0 |
305 |
ELSE |
306 |
penetSWFrac = XIO*EXP(-1.5 _d 0 * HICE_ACTUAL(I,J)) |
307 |
ENDIF |
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C The shortwave radiative flux leaving ocean beneath ice (+=up). |
309 |
IcePenetSW(I,J) = -(1.0 _d 0 - ALB(I,J)) |
310 |
& *penetSWFrac * SWDOWN(I,J,bi,bj) |
311 |
C The shortwave radiative flux convergence in the seaice. |
312 |
absorbedSW(I,J) = (1.0 _d 0 - ALB(I,J)) |
313 |
& *(1.0 _d 0 - penetSWFrac)* SWDOWN(I,J,bi,bj) |
314 |
|
315 |
C The effective conductivity of the two-layer snow/ice system. |
316 |
C Set a minimum sea ice thickness of 5 cm to bound |
317 |
C the magnitude of conductive heat fluxes. |
318 |
Cif * now taken care of by SEAICE_hice_reg in seaice_growth |
319 |
c hice_tmp = max(HICE_ACTUAL(I,J),5. _d -2) |
320 |
effConduct(I,J) = XKI * XKS / |
321 |
& (XKS * HICE_ACTUAL(I,J) + XKI * HSNOW_ACTUAL(I,J)) |
322 |
|
323 |
#ifdef SEAICE_DEBUG |
324 |
IF ( (I .EQ. SEAICE_debugPointI) .AND. |
325 |
& (J .EQ. SEAICE_debugPointJ) ) THEN |
326 |
print '(A,i6)','-----------------------------------' |
327 |
print '(A,i6)','ibi merged initialization ', myIter |
328 |
print '(A,i6,4(1x,D24.15))', |
329 |
& 'ibi iter, TSL, TS ',myIter, |
330 |
& tsurfLoc(I,J), TSURF(I,J,bi,bj) |
331 |
print '(A,i6,4(1x,D24.15))', |
332 |
& 'ibi iter, TMELT ',myIter,TMELT |
333 |
print '(A,i6,4(1x,D24.15))', |
334 |
& 'ibi iter, HIA, EFKCON ',myIter, |
335 |
& HICE_ACTUAL(I,J), effConduct(I,J) |
336 |
print '(A,i6,4(1x,D24.15))', |
337 |
& 'ibi iter, HSNOW ',myIter, |
338 |
& HSNOW_ACTUAL(I,J), ALB(I,J) |
339 |
print '(A,i6)','-----------------------------------' |
340 |
print '(A,i6)','ibi energy balance iterat ', myIter |
341 |
ENDIF |
342 |
#endif /* SEAICE_DEBUG */ |
343 |
|
344 |
ENDIF !/* iceOrNot */ |
345 |
ENDDO !/* i */ |
346 |
ENDDO !/* j */ |
347 |
|
348 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
349 |
DO ITER=1,IMAX_TICE |
350 |
DO J=1,sNy |
351 |
DO I=1,sNx |
352 |
#ifdef ALLOW_AUTODIFF_TAMC |
353 |
iicekey = I + sNx*(J-1) + (ITER-1)*sNx*sNy |
354 |
CADJ STORE tsurfLoc(i,j) = comlev1_solve4temp, |
355 |
CADJ & key = iicekey, byte = isbyte |
356 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
357 |
|
358 |
C- save tsurf from previous iter |
359 |
tsurfPrev(I,J) = tsurfLoc(I,J) |
360 |
IF ( iceOrNot(I,J) ) THEN |
361 |
|
362 |
t1 = tsurfLoc(I,J) |
363 |
t2 = t1*t1 |
364 |
t3 = t2*t1 |
365 |
t4 = t2*t2 |
366 |
|
367 |
C-- Calculate the specific humidity in the BL above the snow/ice |
368 |
IF ( useMaykutSatVapPoly ) THEN |
369 |
C- Use the Maykut polynomial |
370 |
qhice(I,J)=QS1*(C1*t4+C2*t3 +C3*t2+C4*t1+C5) |
371 |
dqh_dTs(I,J) = 0. _d 0 |
372 |
ELSE |
373 |
C- Use exponential relation approx., more accurate at low temperatures |
374 |
C log 10 of the sat vap pressure |
375 |
mm_log10pi = -aa1 / t1 + aa2 |
376 |
C The saturation vapor pressure (SVP) in the surface |
377 |
C boundary layer (BL) above the snow/ice. |
378 |
c mm_pi = TEN **(mm_log10pi) |
379 |
C The following form does the same, but is faster |
380 |
mm_pi = EXP(mm_log10pi*lnTEN) |
381 |
qhice(I,J) = bb1*mm_pi/( Ppascals -(1.0 _d 0 - bb1)*mm_pi ) |
382 |
C A constant for SVP derivative w.r.t TICE |
383 |
c cc3t = TEN **(aa1 / t1) |
384 |
C The following form does the same, but is faster |
385 |
cc3t = EXP(aa1 / t1 * lnTEN) |
386 |
C d(qh)/d(TICE) |
387 |
dqh_dTs(I,J) = cc1*cc3t/((cc2-cc3t*Ppascals)**2 *t2) |
388 |
ENDIF |
389 |
|
390 |
#ifdef ALLOW_AUTODIFF_TAMC |
391 |
CADJ STORE tsurfLoc(i,j) = comlev1_solve4temp, |
392 |
CADJ & key = iicekey, byte = isbyte |
393 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
394 |
C Calculate the flux terms based on the updated tsurfLoc |
395 |
F_c(I,J) = effConduct(I,J)*(tempFrz(I,J)-tsurfLoc(I,J)) |
396 |
F_lh(I,J) = D1I*UG(I,J)*(qhice(I,J)-AQH(I,J,bi,bj)) |
397 |
#ifdef SEAICE_CAP_SUBLIM |
398 |
C if the latent heat flux implied by tsurfLoc exceeds |
399 |
C F_lh_max, cap F_lh and decouple the flux magnitude from TICE |
400 |
IF (F_lh(I,J) .GT. F_lh_max(I,J)) THEN |
401 |
F_lh(I,J) = F_lh_max(I,J) |
402 |
dqh_dTs(I,J) = ZERO |
403 |
ENDIF |
404 |
#endif /* SEAICE_CAP_SUBLIM */ |
405 |
|
406 |
F_lwu(I,J) = t4 * D3(I,J) |
407 |
F_sens(I,J)= D1 * UG(I,J) * (t1 - atempLoc(I,J)) |
408 |
F_ia(I,J) = -lwdownLoc(I,J) -absorbedSW(I,J) + F_lwu(I,J) |
409 |
& + F_sens(I,J) + F_lh(I,J) |
410 |
C d(F_ia)/d(Tsurf) |
411 |
dFia_dTs(I,J) = 4.0 _d 0*D3(I,J)*t3 + D1*UG(I,J) |
412 |
& + D1I*UG(I,J)*dqh_dTs(I,J) |
413 |
|
414 |
#ifdef SEAICE_DEBUG |
415 |
IF ( (I .EQ. SEAICE_debugPointI) .AND. |
416 |
& (J .EQ. SEAICE_debugPointJ) ) THEN |
417 |
print '(A,i6,4(1x,D24.15))', |
418 |
& 'ice-iter qhICE, ', ITER,qhIce(I,J) |
419 |
print '(A,i6,4(1x,D24.15))', |
420 |
& 'ice-iter dFiDTs1 F_ia ', ITER, |
421 |
& dFia_dTs(I,J)+effConduct(I,J), F_ia(I,J)-F_c(I,J) |
422 |
ENDIF |
423 |
#endif /* SEAICE_DEBUG */ |
424 |
|
425 |
C- Update tsurf as solution of : Fc = Fia + d/dT(Fia - Fc) *delta.tsurf |
426 |
tsurfLoc(I,J) = tsurfLoc(I,J) |
427 |
& + ( F_c(I,J)-F_ia(I,J) ) / ( effConduct(I,J)+dFia_dTs(I,J) ) |
428 |
|
429 |
#ifdef ALLOW_AUTODIFF_TAMC |
430 |
CADJ STORE tsurfLoc(i,j) = comlev1_solve4temp, |
431 |
CADJ & key = iicekey, byte = isbyte |
432 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
433 |
IF ( useMaykutSatVapPoly ) THEN |
434 |
tsurfLoc(I,J) = MAX( celsius2K+MIN_TICE, tsurfLoc(I,J) ) |
435 |
ENDIF |
436 |
C If the search leads to tsurfLoc < 50 Kelvin, restart the search |
437 |
C at tsurfLoc = TMELT. Note that one solution to the energy balance problem |
438 |
C is an extremely low temperature - a temperature far below realistic values. |
439 |
c IF (tsurfLoc(I,J) .LT. 50.0 _d 0 ) tsurfLoc(I,J) = TMELT |
440 |
C Comments & code above not relevant anymore (from older version, when |
441 |
C trying Maykut-Polynomial & dqh_dTs > 0 ?): commented out |
442 |
tsurfLoc(I,J) = MIN( tsurfLoc(I,J), TMELT ) |
443 |
|
444 |
#ifdef SEAICE_DEBUG |
445 |
IF ( (I .EQ. SEAICE_debugPointI) .AND. |
446 |
& (J .EQ. SEAICE_debugPointJ) ) THEN |
447 |
print '(A,i6,4(1x,D24.15))', |
448 |
& 'ice-iter tsurfLc,|dif|', ITER, |
449 |
& tsurfLoc(I,J), |
450 |
& LOG10(ABS(tsurfLoc(I,J) - t1)) |
451 |
ENDIF |
452 |
#endif /* SEAICE_DEBUG */ |
453 |
|
454 |
ENDIF !/* iceOrNot */ |
455 |
ENDDO !/* i */ |
456 |
ENDDO !/* j */ |
457 |
ENDDO !/* Iterations */ |
458 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
459 |
|
460 |
DO J=1,sNy |
461 |
DO I=1,sNx |
462 |
IF ( iceOrNot(I,J) ) THEN |
463 |
|
464 |
C Save updated tsurf and finalize the flux terms |
465 |
TSURF(I,J,bi,bj) = tsurfLoc(I,J) |
466 |
|
467 |
#ifdef SEAICE_MODIFY_GROWTH_ADJ |
468 |
Cgf no additional dependency through solver, snow, etc. |
469 |
IF ( SEAICEadjMODE.GE.2 ) THEN |
470 |
CALL ZERO_ADJ_1D( 1, TSURF(I,J,bi,bj), myThid) |
471 |
absorbedSW(I,J) = 0.3 _d 0 *SWDOWN(I,J,bi,bj) |
472 |
IcePenetSW(I,J)= 0. _d 0 |
473 |
ENDIF |
474 |
IF ( postSolvTempIter.EQ.2 .OR. SEAICEadjMODE.GE.2 ) THEN |
475 |
t1 = TSURF(I,J,bi,bj) |
476 |
#else /* SEAICE_MODIFY_GROWTH_ADJ */ |
477 |
|
478 |
IF ( postSolvTempIter.EQ.2 ) THEN |
479 |
C Recalculate the fluxes based on the (possibly) adjusted TSURF |
480 |
t1 = tsurfLoc(I,J) |
481 |
#endif /* SEAICE_MODIFY_GROWTH_ADJ */ |
482 |
t2 = t1*t1 |
483 |
t3 = t2*t1 |
484 |
t4 = t2*t2 |
485 |
|
486 |
IF ( useMaykutSatVapPoly ) THEN |
487 |
qhice(I,J)=QS1*(C1*t4+C2*t3 +C3*t2+C4*t1+C5) |
488 |
ELSE |
489 |
C log 10 of the sat vap pressure |
490 |
mm_log10pi = -aa1 / t1 + aa2 |
491 |
C saturation vapor pressure |
492 |
c mm_pi = TEN **(mm_log10pi) |
493 |
C The following form does the same, but is faster |
494 |
mm_pi = EXP(mm_log10pi*lnTEN) |
495 |
C over ice specific humidity |
496 |
qhice(I,J) = bb1*mm_pi/( Ppascals -(1.0 _d 0 - bb1)*mm_pi ) |
497 |
ENDIF |
498 |
F_c(I,J) = effConduct(I,J) * (tempFrz(I,J) - t1) |
499 |
F_lh(I,J) = D1I * UG(I,J)*(qhice(I,J)-AQH(I,J,bi,bj)) |
500 |
#ifdef SEAICE_CAP_SUBLIM |
501 |
IF (F_lh(I,J) .GT. F_lh_max(I,J)) THEN |
502 |
F_lh(I,J) = F_lh_max(I,J) |
503 |
ENDIF |
504 |
#endif /* SEAICE_CAP_SUBLIM */ |
505 |
F_lwu(I,J) = t4 * D3(I,J) |
506 |
F_sens(I,J) = D1 * UG(I,J) * (t1 - atempLoc(I,J)) |
507 |
C The flux between the ice/snow surface and the atmosphere. |
508 |
F_ia(I,J) = -lwdownLoc(I,J) -absorbedSW(I,J) + F_lwu(I,J) |
509 |
& + F_sens(I,J) + F_lh(I,J) |
510 |
|
511 |
ELSEIF ( postSolvTempIter.EQ.1 ) THEN |
512 |
C Update fluxes (consistent with the linearized formulation) |
513 |
delTsurf = tsurfLoc(I,J)-tsurfPrev(I,J) |
514 |
F_c(I,J) = effConduct(I,J)*(tempFrz(I,J)-tsurfLoc(I,J)) |
515 |
F_ia(I,J) = F_ia(I,J) + dFia_dTs(I,J)*delTsurf |
516 |
F_lh(I,J) = F_lh(I,J) |
517 |
& + D1I*UG(I,J)*dqh_dTs(I,J)*delTsurf |
518 |
|
519 |
c ELSEIF ( postSolvTempIter.EQ.0 ) THEN |
520 |
C Take fluxes from last iteration |
521 |
|
522 |
ENDIF |
523 |
|
524 |
C Fresh water flux (kg/m^2/s) from latent heat of sublimation. |
525 |
C F_lh is positive upward (sea ice looses heat) and FWsublim |
526 |
C is also positive upward (atmosphere gains freshwater) |
527 |
FWsublim(I,J) = F_lh(I,J)/lhSublim |
528 |
|
529 |
#ifdef SEAICE_DEBUG |
530 |
C Calculate the net ice-ocean and ice-atmosphere fluxes |
531 |
IF (F_c(I,J) .GT. 0.0 _d 0) THEN |
532 |
F_io_net = F_c(I,J) |
533 |
F_ia_net = 0.0 _d 0 |
534 |
ELSE |
535 |
F_io_net = 0.0 _d 0 |
536 |
F_ia_net = F_ia(I,J) |
537 |
ENDIF !/* conductive fluxes up or down */ |
538 |
|
539 |
IF ( (I .EQ. SEAICE_debugPointI) .AND. |
540 |
& (J .EQ. SEAICE_debugPointJ) ) THEN |
541 |
print '(A)','----------------------------------------' |
542 |
print '(A,i6)','ibi complete ', myIter |
543 |
print '(A,4(1x,D24.15))', |
544 |
& 'ibi T(SURF, surfLoc,atmos) ', |
545 |
& TSURF(I,J,bi,bj), tsurfLoc(I,J),atempLoc(I,J) |
546 |
print '(A,4(1x,D24.15))', |
547 |
& 'ibi LWL ', lwdownLoc(I,J) |
548 |
print '(A,4(1x,D24.15))', |
549 |
& 'ibi QSW(Total, Penetrating)', |
550 |
& SWDOWN(I,J,bi,bj), IcePenetSW(I,J) |
551 |
print '(A,4(1x,D24.15))', |
552 |
& 'ibi qh(ATM ICE) ', |
553 |
& AQH(I,J,bi,bj),qhice(I,J) |
554 |
print '(A,4(1x,D24.15))', |
555 |
& 'ibi F(lwd,swi,lwu) ', |
556 |
& -lwdownLoc(I,J), -absorbedSW(I,J), F_lwu(I,J) |
557 |
print '(A,4(1x,D24.15))', |
558 |
& 'ibi F(c,lh,sens) ', |
559 |
& F_c(I,J), F_lh(I,J), F_sens(I,J) |
560 |
#ifdef SEAICE_CAP_SUBLIM |
561 |
IF (F_lh_max(I,J) .GT. ZERO) THEN |
562 |
print '(A,4(1x,D24.15))', |
563 |
& 'ibi F_lh_max, F_lh/lhmax) ', |
564 |
& F_lh_max(I,J), F_lh(I,J)/ F_lh_max(I,J) |
565 |
ELSE |
566 |
print '(A,4(1x,D24.15))', |
567 |
& 'ibi F_lh_max = ZERO! ' |
568 |
ENDIF |
569 |
print '(A,4(1x,D24.15))', |
570 |
& 'ibi FWsub, FWsubm*dT/rhoI ', |
571 |
& FWsublim(I,J), |
572 |
& FWsublim(I,J)*SEAICE_deltaTtherm/SEAICE_rhoICE |
573 |
#endif /* SEAICE_CAP_SUBLIM */ |
574 |
print '(A,4(1x,D24.15))', |
575 |
& 'ibi F_ia, F_ia_net, F_c ', |
576 |
& F_ia(I,J), F_ia_net, F_c(I,J) |
577 |
print '(A)','----------------------------------------' |
578 |
ENDIF |
579 |
#endif /* SEAICE_DEBUG */ |
580 |
|
581 |
ENDIF !/* iceOrNot */ |
582 |
ENDDO !/* i */ |
583 |
ENDDO !/* j */ |
584 |
|
585 |
#endif /* ALLOW_ATM_TEMP && ALLOW_DOWNWARD_RADIATION */ |
586 |
RETURN |
587 |
END |