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C !ROUTINE: THSICE_EXTEND |
C !ROUTINE: THSICE_EXTEND |
8 |
C !INTERFACE: |
C !INTERFACE: |
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SUBROUTINE THSICE_EXTEND( |
SUBROUTINE THSICE_EXTEND( |
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I esurp, Tf, |
I bi, bj, siLo, siHi, sjLo, sjHi, |
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U sst, compact, iceThick, snowThick, qicen, |
I iMin,iMax, jMin,jMax, dBugFlag, |
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O qleft, fresh, fsalt, |
I fzMlOc, tFrz, tOce, |
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I dBugFlag, myThid ) |
U icFrac, hIce, hSnow, |
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U tSrf, tIc1, tIc2, qIc1, qIc2, |
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O flx2oc, frw2oc, fsalt, |
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I myTime, myIter, myThid ) |
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C !DESCRIPTION: \bv |
C !DESCRIPTION: \bv |
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C *==========================================================* |
C *==========================================================* |
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C | S/R THSICE_EXTEND |
C | S/R THSICE_EXTEND |
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C | o Extend sea-ice area incresing ice fraction |
C | o Extend sea-ice area incresing ice fraction |
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C *==========================================================* |
C *==========================================================* |
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C | o incorporate surplus of energy to |
C | o incorporate surplus of energy to |
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C | make new ice or make ice grow laterally |
C | make new ice or make ice grow laterally |
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C *==========================================================* |
C *==========================================================* |
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C \ev |
C \ev |
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C !INPUT/OUTPUT PARAMETERS: |
C !INPUT/OUTPUT PARAMETERS: |
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C == Routine Arguments == |
C == Routine Arguments == |
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C esurp :: energy available for freezing [W/m2] |
C siLo,siHi :: size of input/output array: 1rst dim. lower,higher bounds |
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C Tf :: freezing temperature [oC] |
C sjLo,sjHi :: size of input/output array: 2nd dim. lower,higher bounds |
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C sst :: Sea Surf Temp. [oC] |
C bi,bj :: tile indices |
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C compact :: fraction of grid area covered in ice |
C iMin,iMax :: computation domain: 1rst index range |
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C iceThick :: ice height [m] |
C jMin,jMax :: computation domain: 2nd index range |
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C snowThick:: snow height [m] |
C dBugFlag :: allow to print debugging stuff (e.g. on 1 grid point). |
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C qicen :: ice enthalpy [J/m3] |
C--- Input: |
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C qleft :: (additional) heat flux to ocean [W/m2] |
C iceMask :: sea-ice fractional mask [0-1] |
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C fsalt :: (additional) salt flux to ocean [ g/m2/s] |
C fzMlOc (esurp) :: ocean mixed-layer freezing/melting potential [W/m2] |
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C fresh :: (additional) fresh water flux to ocean [kg/m2/s] |
C tFrz (Tf) :: sea-water freezing temperature [oC] (function of S) |
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C dBugFlag :: allow to print debugging stuff (e.g. on 1 grid point). |
C tOce (sst) :: surface level oceanic temperature [oC] |
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C myThid :: thread number for this instance of the routine. |
C--- Modified (input&output): |
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C icFrac(iceFrac):: fraction of grid area covered in ice |
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C hIce (iceThick):: ice height [m] |
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C hSnow(snowThick):: snow height [m] |
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C tSrf :: surface (ice or snow) temperature [oC] |
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C tIc1 :: temperature of ice layer 1 [oC] |
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C tIc2 :: temperature of ice layer 2 [oC] |
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C qIc1 (qicen) :: ice enthalpy (J/kg), 1rst level |
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C qIc2 (qicen) :: ice enthalpy (J/kg), 2nd level |
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C--- Output |
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C flx2oc (=) :: (additional) heat flux to ocean [W/m2] (+=dwn) |
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C frw2oc (=) :: (additional) fresh water flux to ocean [kg/m2/s] (+=dwn) |
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C fsalt (=) :: (additional) salt flux to ocean [g/m2/s] (+=dwn) |
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C--- Input: |
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C myTime :: current Time of simulation [s] |
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C myIter :: current Iteration number in simulation |
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C myThid :: my Thread Id number |
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INTEGER siLo, siHi, sjLo, sjHi |
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INTEGER bi,bj |
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INTEGER iMin, iMax |
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INTEGER jMin, jMax |
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LOGICAL dBugFlag |
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c _RL iceMask(siLo:siHi,sjLo:sjHi) |
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_RL fzMlOc (siLo:siHi,sjLo:sjHi) |
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_RL tFrz (siLo:siHi,sjLo:sjHi) |
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_RL tOce (siLo:siHi,sjLo:sjHi) |
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_RL icFrac (siLo:siHi,sjLo:sjHi) |
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_RL hIce (siLo:siHi,sjLo:sjHi) |
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_RL hSnow (siLo:siHi,sjLo:sjHi) |
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_RL tSrf (siLo:siHi,sjLo:sjHi) |
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_RL tIc1 (siLo:siHi,sjLo:sjHi) |
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_RL tIc2 (siLo:siHi,sjLo:sjHi) |
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_RL qIc1 (siLo:siHi,sjLo:sjHi) |
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_RL qIc2 (siLo:siHi,sjLo:sjHi) |
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_RL flx2oc (siLo:siHi,sjLo:sjHi) |
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_RL frw2oc (siLo:siHi,sjLo:sjHi) |
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_RL fsalt (siLo:siHi,sjLo:sjHi) |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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CEOP |
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#ifdef ALLOW_THSICE |
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C !LOCAL VARIABLES: |
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C--- local copy of input/output argument list variables (see description above) |
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_RL esurp |
_RL esurp |
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_RL Tf |
_RL Tf |
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_RL sst |
_RL sst |
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_RL compact |
_RL iceFrac |
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_RL iceThick |
_RL iceThick |
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_RL snowThick |
_RL snowThick |
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_RL qicen(nlyr) |
_RL qicen(nlyr) |
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_RL qleft |
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_RL fresh |
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_RL fsalt |
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LOGICAL dBugFlag |
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INTEGER myThid |
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CEOP |
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#ifdef ALLOW_THSICE |
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C !LOCAL VARIABLES: |
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C == Local variables == |
C == Local variables == |
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C qicAv :: mean enthalphy of ice (layer 1 & 2) [J/kg] |
C qicAv :: mean enthalpy of ice (layer 1 & 2) [J/m^3] |
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_RL deltaTice ! time-step for ice model |
_RL deltaTice ! time-step for ice model |
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_RL newIce |
_RL newIce |
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_RL newIceFrac |
_RL newIceFrac |
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_RL iceFraction |
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_RL qicAv |
_RL qicAv |
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LOGICAL dBug |
INTEGER i,j ! loop indices |
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C- define grid-point location where to print debugging values |
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#include "THSICE_DEBUG.h" |
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1010 FORMAT(A,I3,3F8.3) |
1010 FORMAT(A,I3,3F8.3) |
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1020 FORMAT(A,1P4E11.3) |
1020 FORMAT(A,1P4E11.3) |
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dBug = .FALSE. |
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c dBug = dBugFlag |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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deltaTice = thSIce_deltaT |
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118 |
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119 |
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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IF (fzMlOc(i,j).GT.0. _d 0) THEN |
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esurp = fzMlOc(i,j) |
123 |
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Tf = tFrz(i,j) |
124 |
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sst = tOce(i,j) |
125 |
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iceFrac = icFrac(i,j) |
126 |
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iceThick= hIce(i,j) |
127 |
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snowThick=hSnow(i,j) |
128 |
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qicen(1)= qIc1(i,j) |
129 |
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qicen(2)= qIc2(i,j) |
130 |
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C--- |
131 |
C-- start ice |
C-- start ice |
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deltaTice = thSIce_deltaT |
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iceFraction = compact |
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132 |
newIceFrac = 0. _d 0 |
newIceFrac = 0. _d 0 |
133 |
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134 |
C- enthalpy of new ice to form : |
C- enthalpy of new ice to form : |
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IF ( compact.LE.0. _d 0 ) THEN |
IF ( iceFrac.LE.0. _d 0 ) THEN |
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qicen(1)= -cpwater*Tmlt1 |
qicen(1)= -cpwater*Tmlt1 |
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& + cpice *(Tmlt1-Tf) + Lfresh*(1. _d 0-Tmlt1/Tf) |
& + cpice *(Tmlt1-Tf) + Lfresh*(1. _d 0-Tmlt1/Tf) |
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qicen(2)= -cpice *Tf + Lfresh |
qicen(2)= -cpice *Tf + Lfresh |
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qicAv = rhoi*(qicen(1)+qicen(2))*0.5 _d 0 |
qicAv = rhoi*(qicen(1)+qicen(2))*0.5 _d 0 |
141 |
newIce = esurp*deltaTice/qicAv |
newIce = esurp*deltaTice/qicAv |
142 |
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143 |
IF (iceFraction.EQ.0. _d 0) THEN |
IF (icFrac(i,j).EQ.0. _d 0) THEN |
144 |
c IF (newIce.GE.himin*iceMaskmax) THEN |
c IF (newIce.GE.himin*iceMaskmax) THEN |
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C- jmc: above is the original version, but below seems more logical: |
C- jmc: above is the original version, but below seems more logical: |
146 |
IF (newIce.GE.himin0*iceMaskmin) THEN |
IF (newIce.GE.himin0*iceMaskmin) THEN |
147 |
C- if there is no ice in grid and enough ice to form: |
C- if there is no ice in grid and enough ice to form: |
148 |
iceThick = MAX(himin0,newIce/iceMaskmax) |
iceThick = MAX(himin0,newIce/iceMaskmax) |
149 |
newIceFrac = MIN(newIce/himin0,iceMaskmax) |
newIceFrac = MIN(newIce/himin0,iceMaskmax) |
150 |
compact = newIceFrac |
iceFrac = newIceFrac |
151 |
sst=Tf |
sst=Tf |
152 |
ENDIF |
ENDIF |
153 |
ELSE |
ELSE |
154 |
C- if there is already some ice |
C- if there is already some ice |
155 |
newIceFrac=MIN(newIce/iceThick,iceMaskmax-iceFraction) |
newIceFrac=MIN(newIce/iceThick,iceMaskmax-icFrac(i,j)) |
156 |
compact = iceFraction + newIceFrac |
iceFrac = icFrac(i,j) + newIceFrac |
157 |
C- spread snow out over ice |
C- spread snow out over ice |
158 |
snowThick = snowThick*iceFraction/compact |
snowThick = snowThick*icFrac(i,j)/iceFrac |
159 |
sst=(1. _d 0-newIceFrac)*sst+newIceFrac*Tf |
sst=(1. _d 0-newIceFrac)*sst+newIceFrac*Tf |
160 |
ENDIF |
ENDIF |
161 |
qleft= iceThick*newIceFrac*qicAv/deltaTice |
C- oceanic fluxes: |
162 |
fresh=-(rhoi*iceThick)*newIceFrac/deltaTice |
flx2oc(i,j)= iceThick*newIceFrac*qicAv/deltaTice |
163 |
fsalt=-(rhoi*iceThick*saltice)*newIceFrac/deltaTice |
frw2oc(i,j)=-(rhoi*iceThick)*newIceFrac/deltaTice |
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fsalt(i,j)= -(rhoi*iceThick*saltice)*newIceFrac/deltaTice |
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IF (dBug) WRITE(6,1020) 'ThSI_EXT: iceH, newIce, newIceFrac=', |
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166 |
& iceThick, newIce, newIceFrac |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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#ifdef ALLOW_DBUG_THSICE |
168 |
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IF ( dBug(i,j,bi,bj) ) THEN |
169 |
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WRITE(6,1020) 'ThSI_EXT: iceH, newIce, newIceFrac=', |
170 |
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& iceThick, newIce, newIceFrac |
171 |
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WRITE(6,1020) 'ThSI_EXT: iceFrac,flx2oc,fsalt,frw2oc=', |
172 |
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& iceFrac,flx2oc(i,j),fsalt(i,j),frw2oc(i,j) |
173 |
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ENDIF |
174 |
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#endif |
175 |
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#ifdef CHECK_ENERGY_CONSERV |
176 |
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CALL THSICE_CHECK_CONSERV( dBugFlag, i, j, bi, bj, 1, |
177 |
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I icFrac(i,j), iceFrac, iceThick, snowThick, qicen, |
178 |
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I flx2oc(i,j), frw2oc(i,j), fsalt(i,j), |
179 |
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I myTime, myIter, myThid ) |
180 |
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#endif /* CHECK_ENERGY_CONSERV */ |
181 |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C-- Update Sea-Ice state output: |
183 |
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IF ( iceFrac.GT.0. _d 0 .AND. icFrac(i,j).EQ.0. _d 0) THEN |
184 |
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tSrf(i,j) = tFrz(i,j) |
185 |
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tIc1(i,j) = tFrz(i,j) |
186 |
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tIc2(i,j) = tFrz(i,j) |
187 |
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qIc1(i,j) = qicen(1) |
188 |
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qIc2(i,j) = qicen(2) |
189 |
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ENDIF |
190 |
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icFrac(i,j) = iceFrac |
191 |
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hIce(i,j) = iceThick |
192 |
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hSnow(i,j ) = snowThick |
193 |
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ENDIF |
194 |
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ENDDO |
195 |
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ENDDO |
196 |
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197 |
#endif /* ALLOW_THSICE */ |
#endif /* ALLOW_THSICE */ |
198 |
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