--- MITgcm/pkg/seaice/groatb.F	2003/02/13 19:28:39	1.4.4.1
+++ MITgcm/pkg/seaice/groatb.F	2003/02/28 09:47:31	1.4.4.4
@@ -18,6 +18,7 @@
 #include "DYNVARS.h"
 #include "FFIELDS.h"
 #include "SEAICE.h"
+#include "SEAICE_PARAMS.h"
 #include "SEAICE_FFIELDS.h"
  
 C     === Routine arguments ===
@@ -33,7 +34,7 @@
 
       INTEGER i, j, bi, bj
       INTEGER KOPEN
-      _RL U1, V1
+      _RL U1, V1, SPEED_SQ
 
       _RL HICE (1-OLx:sNx+OLx, 1-OLy:sNy+OLy)
       _RL UG   (1-OLx:sNx+OLx, 1-OLy:sNy+OLy)
@@ -62,7 +63,7 @@
           TMIX(I,J,bi,bj)=theta(I,J,1,bi,bj)+273.16 _d +00
 #ifdef SEAICE_DEBUG
           TMIX(I,J,bi,bj)=MAX(TMIX(I,J,bi,bj),271.2 _d +00)
-#endif SEAICE_DEBUG
+#endif
          ENDDO
         ENDDO
 
@@ -72,7 +73,12 @@
      1      +UWIND(I,J-1,bi,bj)+UWIND(I,J,bi,bj))
           V1=0.25 _d 0*(VWIND(I-1,J-1,bi,bj)+VWIND(I-1,J,bi,bj)
      1      +VWIND(I,J-1,bi,bj)+VWIND(I,J,bi,bj))
-          UG(I,J)=SQRT(U1**2+V1**2)
+          SPEED_SQ = U1**2 + V1**2
+          IF ( SPEED_SQ .LT. SEAICE_EPS_SQ ) THEN
+             UG(I,J)=SEAICE_EPS
+          ELSE
+             UG(I,J)=SQRT(SPEED_SQ)
+          ENDIF
          ENDDO
         ENDDO
 
@@ -87,7 +93,7 @@
        ENDDO
       ENDDO
 
-#endif ALLOW_SEAICE
+#endif /* ALLOW_SEAICE */
 
       RETURN
       END