--- MITgcm/pkg/seaice/groatb.F	2003/02/14 23:10:36	1.4.4.2
+++ 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)
@@ -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