| 1 |
jmc |
1.4 |
C $Header: /u/gcmpack/MITgcm/pkg/thsice/thsice_extend.F,v 1.3 2006/02/10 00:30:32 jmc Exp $ |
| 2 |
jmc |
1.1 |
C $Name: $ |
| 3 |
|
|
|
| 4 |
|
|
#include "THSICE_OPTIONS.h" |
| 5 |
|
|
|
| 6 |
|
|
CBOP |
| 7 |
|
|
C !ROUTINE: THSICE_EXTEND |
| 8 |
|
|
C !INTERFACE: |
| 9 |
|
|
SUBROUTINE THSICE_EXTEND( |
| 10 |
jmc |
1.4 |
I bi, bj, siLo, siHi, sjLo, sjHi, |
| 11 |
|
|
I iMin,iMax, jMin,jMax, dBugFlag, |
| 12 |
|
|
I fzMlOc, tFrz, tOce, |
| 13 |
|
|
U icFrac, hIce, hSnow, |
| 14 |
|
|
U tSrf, tIc1, tIc2, qIc1, qIc2, |
| 15 |
|
|
O flx2oc, frw2oc, fsalt, |
| 16 |
|
|
I myTime, myIter, myThid ) |
| 17 |
jmc |
1.1 |
C !DESCRIPTION: \bv |
| 18 |
|
|
C *==========================================================* |
| 19 |
jmc |
1.4 |
C | S/R THSICE_EXTEND |
| 20 |
jmc |
1.1 |
C | o Extend sea-ice area incresing ice fraction |
| 21 |
|
|
C *==========================================================* |
| 22 |
jmc |
1.4 |
C | o incorporate surplus of energy to |
| 23 |
|
|
C | make new ice or make ice grow laterally |
| 24 |
jmc |
1.1 |
C *==========================================================* |
| 25 |
|
|
C \ev |
| 26 |
|
|
|
| 27 |
|
|
C !USES: |
| 28 |
|
|
IMPLICIT NONE |
| 29 |
|
|
|
| 30 |
|
|
C == Global variables == |
| 31 |
jmc |
1.2 |
#include "EEPARAMS.h" |
| 32 |
jmc |
1.1 |
#include "THSICE_SIZE.h" |
| 33 |
|
|
#include "THSICE_PARAMS.h" |
| 34 |
|
|
|
| 35 |
|
|
C !INPUT/OUTPUT PARAMETERS: |
| 36 |
|
|
C == Routine Arguments == |
| 37 |
jmc |
1.4 |
C siLo,siHi :: size of input/output array: 1rst dim. lower,higher bounds |
| 38 |
|
|
C sjLo,sjHi :: size of input/output array: 2nd dim. lower,higher bounds |
| 39 |
|
|
C bi,bj :: tile indices |
| 40 |
|
|
C iMin,iMax :: computation domain: 1rst index range |
| 41 |
|
|
C jMin,jMax :: computation domain: 2nd index range |
| 42 |
|
|
C dBugFlag :: allow to print debugging stuff (e.g. on 1 grid point). |
| 43 |
|
|
C--- Input: |
| 44 |
|
|
C iceMask :: sea-ice fractional mask [0-1] |
| 45 |
|
|
C fzMlOc (esurp) :: ocean mixed-layer freezing/melting potential [W/m2] |
| 46 |
|
|
C tFrz (Tf) :: sea-water freezing temperature [oC] (function of S) |
| 47 |
|
|
C tOce (sst) :: surface level oceanic temperature [oC] |
| 48 |
|
|
C--- Modified (input&output): |
| 49 |
|
|
C icFrac(iceFrac):: fraction of grid area covered in ice |
| 50 |
|
|
C hIce (iceThick):: ice height [m] |
| 51 |
|
|
C hSnow(snowThick):: snow height [m] |
| 52 |
|
|
C tSrf :: surface (ice or snow) temperature [oC] |
| 53 |
|
|
C tIc1 :: temperature of ice layer 1 [oC] |
| 54 |
|
|
C tIc2 :: temperature of ice layer 2 [oC] |
| 55 |
|
|
C qIc1 (qicen) :: ice enthalpy (J/kg), 1rst level |
| 56 |
|
|
C qIc2 (qicen) :: ice enthalpy (J/kg), 2nd level |
| 57 |
|
|
C--- Output |
| 58 |
|
|
C flx2oc (=) :: (additional) heat flux to ocean [W/m2] (+=dwn) |
| 59 |
|
|
C frw2oc (=) :: (additional) fresh water flux to ocean [kg/m2/s] (+=dwn) |
| 60 |
|
|
C fsalt (=) :: (additional) salt flux to ocean [g/m2/s] (+=dwn) |
| 61 |
|
|
C--- Input: |
| 62 |
|
|
C myTime :: current Time of simulation [s] |
| 63 |
|
|
C myIter :: current Iteration number in simulation |
| 64 |
|
|
C myThid :: my Thread Id number |
| 65 |
|
|
INTEGER siLo, siHi, sjLo, sjHi |
| 66 |
|
|
INTEGER bi,bj |
| 67 |
|
|
INTEGER iMin, iMax |
| 68 |
|
|
INTEGER jMin, jMax |
| 69 |
|
|
LOGICAL dBugFlag |
| 70 |
|
|
c _RL iceMask(siLo:siHi,sjLo:sjHi) |
| 71 |
|
|
_RL fzMlOc (siLo:siHi,sjLo:sjHi) |
| 72 |
|
|
_RL tFrz (siLo:siHi,sjLo:sjHi) |
| 73 |
|
|
_RL tOce (siLo:siHi,sjLo:sjHi) |
| 74 |
|
|
_RL icFrac (siLo:siHi,sjLo:sjHi) |
| 75 |
|
|
_RL hIce (siLo:siHi,sjLo:sjHi) |
| 76 |
|
|
_RL hSnow (siLo:siHi,sjLo:sjHi) |
| 77 |
|
|
_RL tSrf (siLo:siHi,sjLo:sjHi) |
| 78 |
|
|
_RL tIc1 (siLo:siHi,sjLo:sjHi) |
| 79 |
|
|
_RL tIc2 (siLo:siHi,sjLo:sjHi) |
| 80 |
|
|
_RL qIc1 (siLo:siHi,sjLo:sjHi) |
| 81 |
|
|
_RL qIc2 (siLo:siHi,sjLo:sjHi) |
| 82 |
|
|
_RL flx2oc (siLo:siHi,sjLo:sjHi) |
| 83 |
|
|
_RL frw2oc (siLo:siHi,sjLo:sjHi) |
| 84 |
|
|
_RL fsalt (siLo:siHi,sjLo:sjHi) |
| 85 |
|
|
_RL myTime |
| 86 |
|
|
INTEGER myIter |
| 87 |
|
|
INTEGER myThid |
| 88 |
|
|
CEOP |
| 89 |
|
|
|
| 90 |
|
|
#ifdef ALLOW_THSICE |
| 91 |
|
|
C !LOCAL VARIABLES: |
| 92 |
|
|
C--- local copy of input/output argument list variables (see description above) |
| 93 |
jmc |
1.1 |
_RL esurp |
| 94 |
|
|
_RL Tf |
| 95 |
|
|
_RL sst |
| 96 |
jmc |
1.4 |
_RL iceFrac |
| 97 |
jmc |
1.1 |
_RL iceThick |
| 98 |
|
|
_RL snowThick |
| 99 |
|
|
_RL qicen(nlyr) |
| 100 |
|
|
|
| 101 |
|
|
C == Local variables == |
| 102 |
jmc |
1.3 |
C qicAv :: mean enthalpy of ice (layer 1 & 2) [J/m^3] |
| 103 |
jmc |
1.1 |
_RL deltaTice ! time-step for ice model |
| 104 |
|
|
_RL newIce |
| 105 |
|
|
_RL newIceFrac |
| 106 |
|
|
_RL qicAv |
| 107 |
jmc |
1.4 |
INTEGER i,j ! loop indices |
| 108 |
|
|
|
| 109 |
|
|
C- define grid-point location where to print debugging values |
| 110 |
|
|
#include "THSICE_DEBUG.h" |
| 111 |
jmc |
1.1 |
|
| 112 |
|
|
1010 FORMAT(A,I3,3F8.3) |
| 113 |
|
|
1020 FORMAT(A,1P4E11.3) |
| 114 |
|
|
|
| 115 |
jmc |
1.4 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 116 |
|
|
deltaTice = thSIce_deltaT |
| 117 |
|
|
|
| 118 |
|
|
|
| 119 |
|
|
DO j = jMin, jMax |
| 120 |
|
|
DO i = iMin, iMax |
| 121 |
|
|
IF (fzMlOc(i,j).GT.0. _d 0) THEN |
| 122 |
|
|
esurp = fzMlOc(i,j) |
| 123 |
|
|
Tf = tFrz(i,j) |
| 124 |
|
|
sst = tOce(i,j) |
| 125 |
|
|
iceFrac = icFrac(i,j) |
| 126 |
|
|
iceThick= hIce(i,j) |
| 127 |
|
|
snowThick=hSnow(i,j) |
| 128 |
|
|
qicen(1)= qIc1(i,j) |
| 129 |
|
|
qicen(2)= qIc2(i,j) |
| 130 |
|
|
C--- |
| 131 |
jmc |
1.1 |
C-- start ice |
| 132 |
|
|
newIceFrac = 0. _d 0 |
| 133 |
|
|
|
| 134 |
|
|
C- enthalpy of new ice to form : |
| 135 |
jmc |
1.4 |
IF ( iceFrac.LE.0. _d 0 ) THEN |
| 136 |
jmc |
1.1 |
qicen(1)= -cpwater*Tmlt1 |
| 137 |
|
|
& + cpice *(Tmlt1-Tf) + Lfresh*(1. _d 0-Tmlt1/Tf) |
| 138 |
|
|
qicen(2)= -cpice *Tf + Lfresh |
| 139 |
|
|
ENDIF |
| 140 |
|
|
qicAv = rhoi*(qicen(1)+qicen(2))*0.5 _d 0 |
| 141 |
|
|
newIce = esurp*deltaTice/qicAv |
| 142 |
|
|
|
| 143 |
jmc |
1.4 |
IF (icFrac(i,j).EQ.0. _d 0) THEN |
| 144 |
jmc |
1.1 |
c IF (newIce.GE.himin*iceMaskmax) THEN |
| 145 |
|
|
C- jmc: above is the original version, but below seems more logical: |
| 146 |
|
|
IF (newIce.GE.himin0*iceMaskmin) THEN |
| 147 |
|
|
C- if there is no ice in grid and enough ice to form: |
| 148 |
|
|
iceThick = MAX(himin0,newIce/iceMaskmax) |
| 149 |
|
|
newIceFrac = MIN(newIce/himin0,iceMaskmax) |
| 150 |
jmc |
1.4 |
iceFrac = newIceFrac |
| 151 |
jmc |
1.1 |
sst=Tf |
| 152 |
|
|
ENDIF |
| 153 |
|
|
ELSE |
| 154 |
|
|
C- if there is already some ice |
| 155 |
jmc |
1.4 |
newIceFrac=MIN(newIce/iceThick,iceMaskmax-icFrac(i,j)) |
| 156 |
|
|
iceFrac = icFrac(i,j) + newIceFrac |
| 157 |
jmc |
1.1 |
C- spread snow out over ice |
| 158 |
jmc |
1.4 |
snowThick = snowThick*icFrac(i,j)/iceFrac |
| 159 |
|
|
sst=(1. _d 0-newIceFrac)*sst+newIceFrac*Tf |
| 160 |
jmc |
1.1 |
ENDIF |
| 161 |
jmc |
1.4 |
C- oceanic fluxes: |
| 162 |
|
|
flx2oc(i,j)= iceThick*newIceFrac*qicAv/deltaTice |
| 163 |
|
|
frw2oc(i,j)=-(rhoi*iceThick)*newIceFrac/deltaTice |
| 164 |
|
|
fsalt(i,j)= -(rhoi*iceThick*saltice)*newIceFrac/deltaTice |
| 165 |
|
|
|
| 166 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 167 |
|
|
#ifdef ALLOW_DBUG_THSICE |
| 168 |
|
|
IF ( dBug(i,j,bi,bj) ) THEN |
| 169 |
|
|
WRITE(6,1020) 'ThSI_EXT: iceH, newIce, newIceFrac=', |
| 170 |
|
|
& iceThick, newIce, newIceFrac |
| 171 |
|
|
WRITE(6,1020) 'ThSI_EXT: iceFrac,flx2oc,fsalt,frw2oc=', |
| 172 |
|
|
& iceFrac,flx2oc(i,j),fsalt(i,j),frw2oc(i,j) |
| 173 |
|
|
ENDIF |
| 174 |
|
|
#endif |
| 175 |
|
|
#ifdef CHECK_ENERGY_CONSERV |
| 176 |
|
|
CALL THSICE_CHECK_CONSERV( dBugFlag, i, j, bi, bj, 1, |
| 177 |
|
|
I icFrac(i,j), iceFrac, iceThick, snowThick, qicen, |
| 178 |
|
|
I flx2oc(i,j), frw2oc(i,j), fsalt(i,j), |
| 179 |
|
|
I myTime, myIter, myThid ) |
| 180 |
|
|
#endif /* CHECK_ENERGY_CONSERV */ |
| 181 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 182 |
|
|
C-- Update Sea-Ice state output: |
| 183 |
|
|
IF ( iceFrac.GT.0. _d 0 .AND. icFrac(i,j).EQ.0. _d 0) THEN |
| 184 |
|
|
tSrf(i,j) = tFrz(i,j) |
| 185 |
|
|
tIc1(i,j) = tFrz(i,j) |
| 186 |
|
|
tIc2(i,j) = tFrz(i,j) |
| 187 |
|
|
qIc1(i,j) = qicen(1) |
| 188 |
|
|
qIc2(i,j) = qicen(2) |
| 189 |
|
|
ENDIF |
| 190 |
|
|
icFrac(i,j) = iceFrac |
| 191 |
|
|
hIce(i,j) = iceThick |
| 192 |
|
|
hSnow(i,j ) = snowThick |
| 193 |
|
|
ENDIF |
| 194 |
|
|
ENDDO |
| 195 |
|
|
ENDDO |
| 196 |
jmc |
1.1 |
|
| 197 |
|
|
#endif /* ALLOW_THSICE */ |
| 198 |
|
|
|
| 199 |
|
|
RETURN |
| 200 |
|
|
END |
Parent Directory
| 
Revision Log
| 
Revision Graph