--- MITgcm/pkg/ptracers/ptracers_integrate.F	2004/12/05 22:22:06	1.22
+++ MITgcm/pkg/ptracers/ptracers_integrate.F	2005/04/15 14:23:03	1.23
@@ -1,4 +1,4 @@
-C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/ptracers/ptracers_integrate.F,v 1.22 2004/12/05 22:22:06 jmc Exp $
+C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/ptracers/ptracers_integrate.F,v 1.23 2005/04/15 14:23:03 jmc Exp $
 C $Name:  $
 
 #include "PTRACERS_OPTIONS.h"
@@ -73,6 +73,7 @@
       INTEGER kUp,kDown,km1
       INTEGER GAD_TR
       LOGICAL calcAdvection
+      INTEGER iterNb
 CEOP
 
 C Loop over tracers
@@ -123,11 +124,13 @@
       IF ( PTRACERS_advScheme(iTracer).EQ.ENUM_CENTERED_2ND
      & .OR.PTRACERS_advScheme(iTracer).EQ.ENUM_UPWIND_3RD
      & .OR.PTRACERS_advScheme(iTracer).EQ.ENUM_CENTERED_4TH ) THEN
+        iterNb = myIter
+        IF (staggerTimeStep) iterNb = myIter - 1
         CALL ADAMS_BASHFORTH2(
      I                        bi,bj,K,
      U                        gPtr(1-Olx,1-Oly,1,1,1,iTracer),
      U                        gPtrNm1(1-Olx,1-Oly,1,1,1,iTracer),
-     I                        myIter,myThid )
+     I                        iterNb, myThid )
       ENDIF
 
 C External forcing term(s)