Index: /trunk/LMDZ.MARS/README
===================================================================
--- /trunk/LMDZ.MARS/README	(revision 555)
+++ /trunk/LMDZ.MARS/README	(revision 556)
@@ -1435,4 +1435,6 @@
 >> updates from FGG of euvheat.F, callkeys.h and inifis.F to have the
    "euveff" parameter read from callphys.def
+>> added missing call to surfacearea before call to calchim in physiq (mea
+   culpa) and also moved photochemistry so it occurs after sedimentation.
 
  
Index: /trunk/LMDZ.MARS/libf/phymars/physiq.F
===================================================================
--- /trunk/LMDZ.MARS/libf/phymars/physiq.F	(revision 555)
+++ /trunk/LMDZ.MARS/libf/phymars/physiq.F	(revision 556)
@@ -1059,58 +1059,5 @@
          END IF  ! of IF (water)
 
-
-c   7b. Chemical species
-c     ------------------
-
-#ifndef MESOSCALE
-c        --------------
-c        photochemistry :
-c        --------------
-         IF (photochem .or. thermochem) then
-!NB: Photochemistry includes condensation of H2O2
-            PRINT*, 'SURFDUST,SURFICE TO BE IMPLEMENTED. YAAAAAARG.'
-            call calchim(ptimestep,pplay,pplev,pt,pdt,dist_sol,mu0,
-     $                   zzlev,zzlay,zday,pq,pdq,zdqchim,zdqschim,
-     $                   zdqcloud,zdqscloud,tauref,co2ice,
-     $                   pu,pdu,pv,pdv,surfdust,surfice)
-
-           ! increment values of tracers:
-           DO iq=1,nq ! loop on all tracers; tendencies for non-chemistry
-                      ! tracers is zero anyways
-             DO l=1,nlayer
-               DO ig=1,ngrid
-                 pdq(ig,l,iq)=pdq(ig,l,iq)+zdqchim(ig,l,iq)
-               ENDDO
-             ENDDO
-           ENDDO ! of DO iq=1,nq
-           ! add condensation tendency for H2O2
-           if (igcm_h2o2.ne.0) then
-             DO l=1,nlayer
-               DO ig=1,ngrid
-                 pdq(ig,l,igcm_h2o2)=pdq(ig,l,igcm_h2o2)
-     &                                +zdqcloud(ig,l,igcm_h2o2)
-               ENDDO
-             ENDDO
-           endif
-
-           ! increment surface values of tracers:
-           DO iq=1,nq ! loop on all tracers; tendencies for non-chemistry
-                      ! tracers is zero anyways
-             DO ig=1,ngrid
-               dqsurf(ig,iq)=dqsurf(ig,iq)+zdqschim(ig,iq)
-             ENDDO
-           ENDDO ! of DO iq=1,nq
-           ! add condensation tendency for H2O2
-           if (igcm_h2o2.ne.0) then
-             DO ig=1,ngrid
-               dqsurf(ig,igcm_h2o2)=dqsurf(ig,igcm_h2o2)
-     &                                +zdqscloud(ig,igcm_h2o2)
-             ENDDO
-           endif
-
-         END IF  ! of IF (photochem.or.thermochem)
-#endif
-
-c   7c. Aerosol particles
+c   7b. Aerosol particles
 c     -------------------
 
@@ -1171,5 +1118,63 @@
          END IF   ! of IF (sedimentation)
          
-
+c
+c   7c. Chemical species
+c     ------------------
+
+#ifndef MESOSCALE
+c        --------------
+c        photochemistry :
+c        --------------
+         IF (photochem .or. thermochem) then
+
+!           dust and ice surface area
+            call surfacearea(ngrid, nlayer, ptimestep, pplay, zzlay, 
+     $                       pt, pq, pdq, nq, 
+     $                       rdust, rice, tau, tauscaling, 
+     $                       surfdust, surfice)
+!           call photochemistry
+            call calchim(ptimestep,pplay,pplev,pt,pdt,dist_sol,mu0,
+     $                   zzlev,zzlay,zday,pq,pdq,zdqchim,zdqschim,
+     $                   zdqcloud,zdqscloud,tauref,co2ice,
+     $                   pu,pdu,pv,pdv,surfdust,surfice)
+
+           ! increment values of tracers:
+           DO iq=1,nq ! loop on all tracers; tendencies for non-chemistry
+                      ! tracers is zero anyways
+             DO l=1,nlayer
+               DO ig=1,ngrid
+                 pdq(ig,l,iq)=pdq(ig,l,iq)+zdqchim(ig,l,iq)
+               ENDDO
+             ENDDO
+           ENDDO ! of DO iq=1,nq
+           
+           ! add condensation tendency for H2O2
+           if (igcm_h2o2.ne.0) then
+             DO l=1,nlayer
+               DO ig=1,ngrid
+                 pdq(ig,l,igcm_h2o2)=pdq(ig,l,igcm_h2o2)
+     &                                +zdqcloud(ig,l,igcm_h2o2)
+               ENDDO
+             ENDDO
+           endif
+
+           ! increment surface values of tracers:
+           DO iq=1,nq ! loop on all tracers; tendencies for non-chemistry
+                      ! tracers is zero anyways
+             DO ig=1,ngrid
+               dqsurf(ig,iq)=dqsurf(ig,iq)+zdqschim(ig,iq)
+             ENDDO
+           ENDDO ! of DO iq=1,nq
+
+           ! add condensation tendency for H2O2
+           if (igcm_h2o2.ne.0) then
+             DO ig=1,ngrid
+               dqsurf(ig,igcm_h2o2)=dqsurf(ig,igcm_h2o2)
+     &                                +zdqscloud(ig,igcm_h2o2)
+             ENDDO
+           endif
+
+         END IF  ! of IF (photochem.or.thermochem)
+#endif
 
 c   7d. Updates