--- MITgcm/pkg/seaice/groatb.F	2002/11/11 22:01:21	1.1
+++ MITgcm/pkg/seaice/groatb.F	2002/11/11 22:01:21	1.1.2.1
@@ -0,0 +1,92 @@
+C 
+
+#include "SEAICE_OPTIONS.h"
+ 
+CStartOfInterface
+      SUBROUTINE groatb( A22, myThid )
+C     /==========================================================\
+C     | SUBROUTINE groatb                                        |
+C     | o Calculate ice growth                                   |
+C     |==========================================================|
+C     \==========================================================/
+      IMPLICIT NONE
+ 
+C     === Global variables ===
+#include "SIZE.h"
+#include "EEPARAMS.h"
+#include "PARAMS.h"
+#include "DYNVARS.h"
+#include "FFIELDS.h"
+#include "SEAICE.h"
+#include "SEAICE_FFIELDS.h"
+ 
+C     === Routine arguments ===
+C     myThid - Thread no. that called this routine.
+      _RL A22
+      INTEGER myThid
+CEndOfInterface
+ 
+#ifdef ALLOW_SEAICE
+
+C     === Local variables ===
+C     i,j,k,bi,bj - Loop counters
+
+      INTEGER i, j, k, bi, bj
+      INTEGER KOPEN
+      _RL U1, V1
+
+      _RL HICE (1-OLx:sNx+OLx, 1-OLy:sNy+OLy)
+      _RL AR   (1-OLx:sNx+OLx, 1-OLy:sNy+OLy)
+      _RL UG   (1-OLx:sNx+OLx, 1-OLy:sNy+OLy)
+
+C if this is not done before then do it here
+      _EXCH_XY_R8(GAIRX, myThid)
+      _EXCH_XY_R8(GAIRY, myThid)
+
+      DO bj=myByLo(myThid),myByHi(myThid)
+       DO bi=myBxLo(myThid),myBxHi(myThid)
+
+C DETERMINE AMOUNT OF OPEN WATER AND ICE THICKNESS
+        DO J=1,sNy
+         DO I=1,sNx
+          AREA(I,J,2,bi,bj)=MAX(A22,AREA(I,J,2,bi,bj))
+          FHEFF(I,J,bi,bj)=0.0
+          HICE(I,J)=HEFF(I,J,2,bi,bj)/AREA(I,J,2,bi,bj)
+         ENDDO
+        ENDDO
+
+C NOW DETERMINE MIXED LAYER TEMPERATURE
+        DO J=1,sNy
+         DO I=1,sNx
+          TMIX(I,J,bi,bj)=theta(I,J,1,bi,bj)+273.16E+00
+#ifdef SEAICE_DEBUG
+          TMIX(I,J,bi,bj)=MAX(TMIX(I,J,bi,bj),271.2E+00)
+#endif SEAICE_DEBUG
+         ENDDO
+        ENDDO
+
+        DO J=1,sNy
+         DO I=1,sNx
+          U1=0.25*(GAIRX(I-1,J-1,bi,bj)+GAIRX(I-1,J,bi,bj)
+     1      +GAIRX(I,J-1,bi,bj)+GAIRX(I,J,bi,bj))
+          V1=0.25*(GAIRY(I-1,J-1,bi,bj)+GAIRY(I-1,J,bi,bj)
+     1      +GAIRY(I,J-1,bi,bj)+GAIRY(I,J,bi,bj))
+          UG(I,J)=SQRT(U1**2+V1**2)
+         ENDDO
+        ENDDO
+
+C NOW DETERMINE GROWTH RATES
+C FIRST DO OPEN WATER
+        KOPEN=-1
+        CALL BUDGET(UG, TMIX, HICE, FO, KOPEN, bi, bj)
+C NOW DO ICE
+        KOPEN=1
+        CALL BUDGET(UG, TICE, HICE, FICE, KOPEN, bi, bj)
+
+       ENDDO
+      ENDDO
+
+#endif ALLOW_SEAICE
+
+      RETURN
+      END