Index: LMDZ6/trunk/libf/phylmd/ecrad/radiation/readaerosolstrato_ecrad.F90
===================================================================
--- LMDZ6/trunk/libf/phylmd/ecrad/radiation/readaerosolstrato_ecrad.F90	(revision 4790)
+++ LMDZ6/trunk/libf/phylmd/ecrad/radiation/readaerosolstrato_ecrad.F90	(revision 4790)
@@ -0,0 +1,564 @@
+!
+! $Id: readaerosolstrato_ecrad.F90 tlurton $
+!
+SUBROUTINE readaerosolstrato_ecrad(config, debut, ok_volcan)
+
+    USE netcdf95, ONLY: nf95_close, nf95_gw_var, nf95_inq_dimid, & 
+                        nf95_inq_varid, nf95_open
+    USE netcdf, ONLY: nf90_get_var, nf90_noerr, nf90_nowrite
+
+    USE phys_cal_mod, ONLY : mth_cur
+    USE mod_grid_phy_lmdz, ONLY: nbp_lon, nbp_lat, klon_glo, grid2dTo1d_glo, grid_type, unstructured
+    USE mod_phys_lmdz_mpi_data
+    USE mod_phys_lmdz_omp_data
+    USE mod_phys_lmdz_para 
+    USE phys_state_var_mod
+    USE phys_local_var_mod
+!    USE physiq_mod, ONLY : ok_volcan
+    USE aero_mod
+    USE dimphy
+!    USE YOERAD
+    USE radiation_config, ONLY : config_type
+    USE YOMCST
+#ifdef CPP_XIOS
+    USE xios
+#endif
+
+    IMPLICIT NONE
+
+    INCLUDE "clesphys.h"
+
+    CHARACTER (len = 80) :: abort_message
+    CHARACTER (LEN=20) :: modname = 'readaerosolstrato_ecrad'
+
+! Variable input
+    LOGICAL, INTENT(IN) ::  debut
+    LOGICAL, INTENT(IN) ::  ok_volcan !activate volcanic diags
+
+! Variables locales
+    INTEGER n_lat   ! number of latitudes in the input data
+    INTEGER n_lon   ! number of longitudes
+    INTEGER n_lev   ! number of levels in the input data
+    INTEGER n_month ! number of months in the input data
+    INTEGER n_wav   ! number of wavelengths in the input data
+    REAL, ALLOCATABLE:: latitude(:)
+    REAL, ALLOCATABLE:: time(:)
+    REAL, ALLOCATABLE:: lev(:)
+    REAL, ALLOCATABLE:: wav(:)
+    INTEGER i,k,wave,band
+    INTEGER, SAVE :: mth_pre=1
+!$OMP THREADPRIVATE(mth_pre)
+
+    REAL, ALLOCATABLE, DIMENSION(:,:,:), SAVE :: tau_aer_strat
+    REAL, ALLOCATABLE, DIMENSION(:,:,:), SAVE :: piz_aer_strat
+    REAL, ALLOCATABLE, DIMENSION(:,:,:), SAVE :: cg_aer_strat
+    REAL, ALLOCATABLE, DIMENSION(:,:,:), SAVE :: taulw_aer_strat
+! add ThL
+    REAL, ALLOCATABLE, DIMENSION(:,:,:), SAVE :: pizlw_aer_strat
+    REAL, ALLOCATABLE, DIMENSION(:,:,:), SAVE :: cglw_aer_strat
+! end add ThL
+! mod ThL
+!$OMP THREADPRIVATE(tau_aer_strat,piz_aer_strat,cg_aer_strat,taulw_aer_strat,pizlw_aer_strat,cglw_aer_strat)
+! end mod ThL
+
+! Champs reconstitues
+    REAL, ALLOCATABLE:: tauaerstrat(:, :, :, :)
+    REAL, ALLOCATABLE:: pizaerstrat(:, :, :, :)
+    REAL, ALLOCATABLE:: cgaerstrat(:, :, :, :)
+    REAL, ALLOCATABLE:: taulwaerstrat(:, :, :, :)
+! add ThL
+    REAL, ALLOCATABLE:: pizlwaerstrat(:, :, :, :)
+    REAL, ALLOCATABLE:: cglwaerstrat(:, :, :, :)
+! end add ThL
+
+    REAL, ALLOCATABLE:: tauaerstrat_mois(:, :, :, :)
+    REAL, ALLOCATABLE:: pizaerstrat_mois(:, :, :, :)
+    REAL, ALLOCATABLE:: cgaerstrat_mois(:, :, :, :)
+    REAL, ALLOCATABLE:: taulwaerstrat_mois(:, :, :, :)
+! add ThL
+    REAL, ALLOCATABLE:: pizlwaerstrat_mois(:, :, :, :)
+    REAL, ALLOCATABLE:: cglwaerstrat_mois(:, :, :, :)
+! end add ThL
+
+    REAL, ALLOCATABLE:: tauaerstrat_mois_glo(:, :, :)
+    REAL, ALLOCATABLE:: pizaerstrat_mois_glo(:, :, :)
+    REAL, ALLOCATABLE:: cgaerstrat_mois_glo(:, :, :)
+    REAL, ALLOCATABLE:: taulwaerstrat_mois_glo(:, :, :)
+! add ThL
+    REAL, ALLOCATABLE:: pizlwaerstrat_mois_glo(:, :, :)
+    REAL, ALLOCATABLE:: cglwaerstrat_mois_glo(:, :, :) 
+! end add ThL
+    REAL, ALLOCATABLE:: tauaerstrat_mpi(:, :, :)
+    REAL, ALLOCATABLE:: pizaerstrat_mpi(:, :, :)
+    REAL, ALLOCATABLE:: cgaerstrat_mpi(:, :, :)
+    REAL, ALLOCATABLE:: taulwaerstrat_mpi(:, :, :)
+! add ThL
+    REAL, ALLOCATABLE:: pizlwaerstrat_mpi(:, :, :)
+    REAL, ALLOCATABLE:: cglwaerstrat_mpi(:, :, :)
+! end add ThL
+
+! For NetCDF:
+    INTEGER ncid_in  ! IDs for input files
+    INTEGER varid, ncerr
+
+    TYPE(config_type), INTENT(IN) :: config
+
+!--------------------------------------------------------
+
+    IF (.not.ALLOCATED(tau_aer_strat)) ALLOCATE(tau_aer_strat(klon,klev,config%n_bands_sw))
+    IF (.not.ALLOCATED(piz_aer_strat)) ALLOCATE(piz_aer_strat(klon,klev,config%n_bands_sw))
+    IF (.not.ALLOCATED(cg_aer_strat))  ALLOCATE(cg_aer_strat(klon,klev,config%n_bands_sw))
+
+    IF (.not.ALLOCATED(taulw_aer_strat)) ALLOCATE(taulw_aer_strat(klon,klev,config%n_bands_lw))
+! add ThL    
+    IF (.not.ALLOCATED(pizlw_aer_strat)) ALLOCATE(pizlw_aer_strat(klon,klev,config%n_bands_lw))
+    IF (.not.ALLOCATED(cglw_aer_strat)) ALLOCATE(cglw_aer_strat(klon,klev,config%n_bands_lw))
+! end add ThL
+
+!--we only read monthly strat aerosol data
+    IF (debut.OR.mth_cur.NE.mth_pre) THEN
+
+!--only root reads the data
+      IF (is_mpi_root.AND.is_omp_root) THEN
+
+!--check mth_cur
+        IF (mth_cur.LT.1.OR.mth_cur.GT.12) THEN
+          print *,'probleme avec le mois dans readaerosolstrat =', mth_cur
+        ENDIF
+
+!--initialize n_lon as input data is 2D (lat-alt) only
+        n_lon = nbp_lon
+
+!--Starts with SW optical properties
+
+        CALL nf95_open("tauswstrat.2D.nc", nf90_nowrite, ncid_in)
+
+        CALL nf95_inq_varid(ncid_in, "LEV", varid)
+        CALL nf95_gw_var(ncid_in, varid, lev)
+        n_lev = size(lev)
+        IF (n_lev.NE.klev) THEN 
+           abort_message='Le nombre de niveaux n est pas egal a klev'
+           CALL abort_physic(modname,abort_message,1)
+        ENDIF
+
+        CALL nf95_inq_varid(ncid_in, "LAT", varid)
+        CALL nf95_gw_var(ncid_in, varid, latitude)
+        n_lat = size(latitude)
+
+        IF (grid_type/=unstructured) THEN
+           IF (n_lat.NE.nbp_lat) THEN 
+             print *, 'latitude=', n_lat, nbp_lat
+             abort_message='Le nombre de lat n est pas egal a nbp_lat'
+             CALL abort_physic(modname,abort_message,1)
+           ENDIF
+        ENDIF
+
+        CALL nf95_inq_varid(ncid_in, "TIME", varid)
+        CALL nf95_gw_var(ncid_in, varid, time)
+        n_month = size(time)
+        IF (n_month.NE.12) THEN 
+           abort_message='Le nombre de month n est pas egal a 12'
+           CALL abort_physic(modname,abort_message,1)
+        ENDIF
+
+        CALL nf95_inq_varid(ncid_in, "WAV", varid)
+        CALL nf95_gw_var(ncid_in, varid, wav)
+        n_wav = size(wav)
+        print *, 'WAV aerosol strato=', n_wav, wav
+!        IF (n_wav.NE.config%n_bands_sw) THEN 
+!           abort_message='Le nombre de wav n est pas egal a config%n_bands_sw'
+!           CALL abort_physic(modname,abort_message,1)
+!        ENDIF
+
+        ALLOCATE(tauaerstrat(n_lat, n_lev, n_wav, n_month))
+        ALLOCATE(pizaerstrat(n_lat, n_lev, n_wav, n_month))
+        ALLOCATE(cgaerstrat(n_lat, n_lev, n_wav, n_month))
+
+!--reading stratospheric aerosol tau per layer
+        CALL nf95_inq_varid(ncid_in, "TAU_SUN", varid)
+        ncerr = nf90_get_var(ncid_in, varid, tauaerstrat)
+        print *,'code erreur readaerosolstrato=', ncerr, varid
+
+!--reading stratospheric aerosol omega per layer
+        CALL nf95_inq_varid(ncid_in, "OME_SUN", varid)
+        ncerr = nf90_get_var(ncid_in, varid, pizaerstrat)
+        print *,'code erreur readaerosolstrato=', ncerr, varid
+
+!--reading stratospheric aerosol g per layer
+        CALL nf95_inq_varid(ncid_in, "GGG_SUN", varid)
+        ncerr = nf90_get_var(ncid_in, varid, cgaerstrat)
+        print *,'code erreur readaerosolstrato sw=', ncerr, varid
+
+        CALL nf95_close(ncid_in)
+
+       
+        IF (grid_type/=unstructured) THEN
+          ALLOCATE(tauaerstrat_mois(n_lon, n_lat, n_lev, n_wav))
+          ALLOCATE(pizaerstrat_mois(n_lon, n_lat, n_lev, n_wav))
+          ALLOCATE(cgaerstrat_mois(n_lon, n_lat, n_lev, n_wav))
+
+          ALLOCATE(tauaerstrat_mois_glo(klon_glo, n_lev, n_wav))
+          ALLOCATE(pizaerstrat_mois_glo(klon_glo, n_lev, n_wav))
+          ALLOCATE(cgaerstrat_mois_glo(klon_glo, n_lev, n_wav))
+!--select the correct month
+!--and copy into 1st longitude
+          tauaerstrat_mois(1,:,:,:) = tauaerstrat(:,:,:,mth_cur)
+          pizaerstrat_mois(1,:,:,:) = pizaerstrat(:,:,:,mth_cur)
+          cgaerstrat_mois(1,:,:,:)  = cgaerstrat(:,:,:,mth_cur)
+
+!--copy longitudes
+          DO i=2, n_lon
+           tauaerstrat_mois(i,:,:,:) = tauaerstrat_mois(1,:,:,:)
+           pizaerstrat_mois(i,:,:,:) = pizaerstrat_mois(1,:,:,:)
+           cgaerstrat_mois(i,:,:,:)  = cgaerstrat_mois(1,:,:,:)
+          ENDDO
+
+!---reduce to a klon_glo grid 
+          DO band=1, config%n_bands_sw
+            CALL grid2dTo1d_glo(tauaerstrat_mois(:,:,:,band),tauaerstrat_mois_glo(:,:,band))
+            CALL grid2dTo1d_glo(pizaerstrat_mois(:,:,:,band),pizaerstrat_mois_glo(:,:,band))
+            CALL grid2dTo1d_glo(cgaerstrat_mois(:,:,:,band),cgaerstrat_mois_glo(:,:,band))
+          ENDDO
+        ENDIF
+!--Now LW optical properties
+!
+
+        CALL nf95_open("taulwstrat.2D.nc", nf90_nowrite, ncid_in)
+
+        CALL nf95_inq_varid(ncid_in, "LEV", varid)
+        CALL nf95_gw_var(ncid_in, varid, lev)
+        n_lev = size(lev)
+        IF (n_lev.NE.klev) THEN 
+           abort_message='Le nombre de niveaux n est pas egal a klev'
+           CALL abort_physic(modname,abort_message,1)
+        ENDIF
+
+        CALL nf95_inq_varid(ncid_in, "LAT", varid)
+        CALL nf95_gw_var(ncid_in, varid, latitude)
+        n_lat = size(latitude)
+
+        IF (grid_type/=unstructured) THEN
+          IF (n_lat.NE.nbp_lat) THEN 
+             abort_message='Le nombre de lat n est pas egal a nbp_lat'
+             CALL abort_physic(modname,abort_message,1)
+          ENDIF
+        ENDIF
+        
+        CALL nf95_inq_varid(ncid_in, "TIME", varid)
+        CALL nf95_gw_var(ncid_in, varid, time)
+        n_month = size(time)
+        IF (n_month.NE.12) THEN 
+           abort_message='Le nombre de month n est pas egal a 12'
+           CALL abort_physic(modname,abort_message,1)
+        ENDIF
+
+        CALL nf95_inq_varid(ncid_in, "WAV", varid)
+        CALL nf95_gw_var(ncid_in, varid, wav)
+        n_wav = size(wav)
+        print *, 'WAV aerosol strato=', n_wav, wav
+!        IF (n_wav.NE.config%n_bands_lw) THEN 
+!           abort_message='Le nombre de wav n est pas egal a config%n_bands_lw'
+!           CALL abort_physic(modname,abort_message,1)
+!        ENDIF
+
+        ALLOCATE(taulwaerstrat(n_lat, n_lev, n_wav, n_month))
+! add ThL
+        ALLOCATE(pizlwaerstrat(n_lat, n_lev, n_wav, n_month))
+        ALLOCATE(cglwaerstrat(n_lat, n_lev, n_wav, n_month))
+! end add ThL
+
+!--reading stratospheric aerosol lw tau per layer
+        CALL nf95_inq_varid(ncid_in, "TAU_EAR", varid)
+        ncerr = nf90_get_var(ncid_in, varid, taulwaerstrat)
+        print *,'code erreur readaerosolstrato lw=', ncerr, varid
+
+! add/mod ThL
+!--with ECRAd, we also read omega and g:
+       !--reading stratospheric aerosol omega per layer
+        CALL nf95_inq_varid(ncid_in, "OME_EAR", varid)
+        ncerr = nf90_get_var(ncid_in, varid, pizlwaerstrat)
+        print *,'code erreur readaerosolstrato lw=', ncerr, varid
+
+!--reading stratospheric aerosol g per layer
+        CALL nf95_inq_varid(ncid_in, "GGG_EAR", varid)
+        ncerr = nf90_get_var(ncid_in, varid, cglwaerstrat)
+        print *,'code erreur readaerosolstrato lw=', ncerr, varid
+
+        CALL nf95_close(ncid_in)
+
+        IF (grid_type/=unstructured) THEN
+
+          ALLOCATE(taulwaerstrat_mois(n_lon, n_lat, n_lev, n_wav))
+          ALLOCATE(pizlwaerstrat_mois(n_lon, n_lat, n_lev, n_wav))
+          ALLOCATE(cglwaerstrat_mois(n_lon, n_lat, n_lev, n_wav))
+
+          ALLOCATE(taulwaerstrat_mois_glo(klon_glo, n_lev, n_wav))
+          ALLOCATE(pizlwaerstrat_mois_glo(klon_glo, n_lev, n_wav))
+          ALLOCATE(cglwaerstrat_mois_glo(klon_glo, n_lev, n_wav))
+!--select the correct month
+!--and copy into 1st longitude
+          taulwaerstrat_mois(1,:,:,:) = taulwaerstrat(:,:,:,mth_cur)
+          pizlwaerstrat_mois(1,:,:,:) = pizlwaerstrat(:,:,:,mth_cur)
+          cglwaerstrat_mois(1,:,:,:) = cglwaerstrat(:,:,:,mth_cur)
+!--copy longitudes
+          DO i=2, n_lon
+            taulwaerstrat_mois(i,:,:,:) = taulwaerstrat_mois(1,:,:,:)
+            pizlwaerstrat_mois(i,:,:,:) = pizlwaerstrat_mois(1,:,:,:)
+            cglwaerstrat_mois(i,:,:,:) = cglwaerstrat_mois(1,:,:,:)
+          ENDDO
+
+!---reduce to a klon_glo grid 
+          DO band=1, config%n_bands_lw
+            CALL grid2dTo1d_glo(taulwaerstrat_mois(:,:,:,band),taulwaerstrat_mois_glo(:,:,band))
+            CALL grid2dTo1d_glo(pizlwaerstrat_mois(:,:,:,band),pizlwaerstrat_mois_glo(:,:,band))
+            CALL grid2dTo1d_glo(cglwaerstrat_mois(:,:,:,band),cglwaerstrat_mois_glo(:,:,band))
+          ENDDO
+        ENDIF
+      
+      ELSE !--proc other than mpi_root and omp_root
+           !--dummy allocation needed for debug mode
+
+        ALLOCATE(tauaerstrat_mois_glo(1,1,1))
+        ALLOCATE(pizaerstrat_mois_glo(1,1,1))
+        ALLOCATE(cgaerstrat_mois_glo(1,1,1))
+        ALLOCATE(taulwaerstrat_mois_glo(1,1,1))
+        ALLOCATE(pizlwaerstrat_mois_glo(1,1,1))
+        ALLOCATE(cglwaerstrat_mois_glo(1,1,1))
+
+        ALLOCATE(tauaerstrat(0,0,0,12))
+        ALLOCATE(pizaerstrat(0,0,0,12))
+        ALLOCATE(cgaerstrat(0,0,0,12))
+        ALLOCATE(taulwaerstrat(0,0,0,12))
+        ALLOCATE(pizlwaerstrat(0,0,0,12))
+        ALLOCATE(cglwaerstrat(0,0,0,12))
+! end add/mod ThL
+
+      ENDIF !--is_mpi_root and is_omp_root
+
+!$OMP BARRIER
+
+!--keep memory of previous month
+      mth_pre=mth_cur
+
+      IF (grid_type==unstructured) THEN
+
+#ifdef CPP_XIOS
+
+        IF (is_omp_master) THEN
+          ALLOCATE(tauaerstrat_mpi(klon_mpi, klev, config%n_bands_sw))
+          ALLOCATE(pizaerstrat_mpi(klon_mpi, klev, config%n_bands_sw))
+          ALLOCATE(cgaerstrat_mpi(klon_mpi, klev, config%n_bands_sw))        
+          ALLOCATE(taulwaerstrat_mpi(klon_mpi, klev, config%n_bands_lw))
+! add ThL
+          ALLOCATE(pizlwaerstrat_mpi(klon_mpi, klev, config%n_bands_lw))
+          ALLOCATE(cglwaerstrat_mpi(klon_mpi, klev, config%n_bands_lw))
+! end add ThL
+
+          CALL xios_send_field("tauaerstrat_in",SPREAD(tauaerstrat(:,:,:,mth_cur),1,8))
+          CALL xios_recv_field("tauaerstrat_out",tauaerstrat_mpi)
+          CALL xios_send_field("pizaerstrat_in",SPREAD(pizaerstrat(:,:,:,mth_cur),1,8))
+          CALL xios_recv_field("pizaerstrat_out",pizaerstrat_mpi)
+          CALL xios_send_field("cgaerstrat_in",SPREAD(cgaerstrat(:,:,:,mth_cur),1,8))
+          CALL xios_recv_field("cgaerstrat_out",cgaerstrat_mpi)
+          CALL xios_send_field("taulwaerstrat_in",SPREAD(taulwaerstrat(:,:,:,mth_cur),1,8))
+          CALL xios_recv_field("taulwaerstrat_out",taulwaerstrat_mpi)
+! add ThL
+          CALL xios_send_field("pizlwaerstrat_in",SPREAD(pizlwaerstrat(:,:,:,mth_cur),1,8))
+          CALL xios_recv_field("pizlwaerstrat_out",pizlwaerstrat_mpi)
+          CALL xios_send_field("cglwaerstrat_in",SPREAD(cglwaerstrat(:,:,:,mth_cur),1,8))
+          CALL xios_recv_field("cglwaerstrat_out",cglwaerstrat_mpi)
+! end add ThL
+        ELSE
+          ALLOCATE(tauaerstrat_mpi(0, 0, 0))
+          ALLOCATE(pizaerstrat_mpi(0, 0, 0))
+          ALLOCATE(cgaerstrat_mpi(0, 0, 0))        
+          ALLOCATE(taulwaerstrat_mpi(0, 0, 0))
+! add ThL
+          ALLOCATE(pizlwaerstrat_mpi(0, 0, 0))
+          ALLOCATE(cglwaerstrat_mpi(0, 0, 0))
+! end add ThL
+        ENDIF  
+        
+        CALL scatter_omp(tauaerstrat_mpi,tau_aer_strat)
+        CALL scatter_omp(pizaerstrat_mpi,piz_aer_strat)
+        CALL scatter_omp(cgaerstrat_mpi,cg_aer_strat)
+        CALL scatter_omp(taulwaerstrat_mpi,taulw_aer_strat)
+! add ThL
+        CALL scatter_omp(pizlwaerstrat_mpi,pizlw_aer_strat)
+        CALL scatter_omp(cglwaerstrat_mpi,cglw_aer_strat)
+! end add ThL
+#endif
+      ELSE  
+        
+!--scatter on all proc
+        CALL scatter(tauaerstrat_mois_glo,tau_aer_strat)
+        CALL scatter(pizaerstrat_mois_glo,piz_aer_strat)
+        CALL scatter(cgaerstrat_mois_glo,cg_aer_strat)
+        CALL scatter(taulwaerstrat_mois_glo,taulw_aer_strat)
+! add ThL
+        CALL scatter(pizlwaerstrat_mois_glo,pizlw_aer_strat)
+        CALL scatter(cglwaerstrat_mois_glo,cglw_aer_strat) 
+! end add ThL
+        IF (is_mpi_root.AND.is_omp_root)  DEALLOCATE(tauaerstrat_mois, pizaerstrat_mois, cgaerstrat_mois, taulwaerstrat_mois, pizlwaerstrat_mois, cglwaerstrat_mois) ! mod ThL
+
+      ENDIF 
+
+      IF (is_mpi_root.AND.is_omp_root) THEN
+        DEALLOCATE(tauaerstrat, pizaerstrat, cgaerstrat, taulwaerstrat, pizlwaerstrat, cglwaerstrat) ! mod ThL
+      ENDIF
+      
+
+!$OMP BARRIER
+
+    ENDIF !--debut ou nouveau mois
+
+!--total vertical aod at the SW wavelengths
+!--for now use ECRAD band #10 AOD into all wavelengths
+!--it is only a reasonable approximation for 550 nm
+!--WAV(10)=0.53 µm
+!--<!!!> This is considering that wavebands are in their original order,
+!--and have NOT been re-ordered monotonously, i.e. with
+!--WAV(1) = 3.46 µm
+!--WAV(2) = 2.79 µm
+!--(...)
+!--WAV(last-1) = 0.23 µm
+!--WAV(last)= 8.02 µm
+!--If bands were to be re-ordered, i.e. last band be put in 1st position,
+!--then we should consider band=11 to fetch WAV=0.53 µm.
+    band=10
+    DO i=1, klon
+    DO k=1, klev
+      IF (stratomask(i,k).GT.0.999999) THEN
+        DO wave=1, config%n_bands_sw
+          tausum_aero(i,wave,id_STRAT_phy)=tausum_aero(i,wave,id_STRAT_phy)+tau_aer_strat(i,k,band)
+        ENDDO
+      ENDIF
+    ENDDO
+    ENDDO
+
+    IF (.NOT. ok_volcan) THEN
+!
+!--this is the default case 
+!--stratospheric aerosols are added to both index 2 and 1 for double radiation calls
+!--weighted average for cg, piz and tau, adding strat aerosols on top of tropospheric ones
+    DO band=1, config%n_bands_sw
+      WHERE (stratomask.GT.0.999999)
+!--strat aerosols are added to index 2: natural and anthropogenic aerosols for bands 1 to config%n_bands_sw 
+        cg_aero_sw_rrtm(:,:,2,band)  = ( cg_aero_sw_rrtm(:,:,2,band)*piz_aero_sw_rrtm(:,:,2,band)*tau_aero_sw_rrtm(:,:,2,band) + &
+                                         cg_aer_strat(:,:,band)*piz_aer_strat(:,:,band)*tau_aer_strat(:,:,band) ) /              &
+                                    MAX( piz_aero_sw_rrtm(:,:,2,band)*tau_aero_sw_rrtm(:,:,2,band) +                             &
+                                         piz_aer_strat(:,:,band)*tau_aer_strat(:,:,band), 1.e-15 )
+        piz_aero_sw_rrtm(:,:,2,band) = ( piz_aero_sw_rrtm(:,:,2,band)*tau_aero_sw_rrtm(:,:,2,band) +                             &
+                                         piz_aer_strat(:,:,band)*tau_aer_strat(:,:,band) ) /                                     &
+                                    MAX( tau_aero_sw_rrtm(:,:,2,band) + tau_aer_strat(:,:,band), 1.e-15 )
+        tau_aero_sw_rrtm(:,:,2,band)  = tau_aero_sw_rrtm(:,:,2,band) + tau_aer_strat(:,:,band)
+!--strat aerosols are added to index 1: natural aerosols only for bands 1 to config%n_bands_sw
+        cg_aero_sw_rrtm(:,:,1,band)  = ( cg_aero_sw_rrtm(:,:,1,band)*piz_aero_sw_rrtm(:,:,1,band)*tau_aero_sw_rrtm(:,:,1,band) + &
+                                         cg_aer_strat(:,:,band)*piz_aer_strat(:,:,band)*tau_aer_strat(:,:,band) ) /              &
+                                    MAX( piz_aero_sw_rrtm(:,:,1,band)*tau_aero_sw_rrtm(:,:,1,band) +                             &
+                                         piz_aer_strat(:,:,band)*tau_aer_strat(:,:,band), 1.e-15 )
+        piz_aero_sw_rrtm(:,:,1,band) = ( piz_aero_sw_rrtm(:,:,1,band)*tau_aero_sw_rrtm(:,:,1,band) +                             &
+                                         piz_aer_strat(:,:,band)*tau_aer_strat(:,:,band) ) /                                     &
+                                    MAX( tau_aero_sw_rrtm(:,:,1,band) + tau_aer_strat(:,:,band), 1.e-15 )
+        tau_aero_sw_rrtm(:,:,1,band)  = tau_aero_sw_rrtm(:,:,1,band) + tau_aer_strat(:,:,band)
+    ENDWHERE
+    ENDDO
+!
+    ELSE
+!
+!--this is the VOLMIP case
+!--stratospheric aerosols are only added to index 2 in this case 
+!--weighted average for cg, piz and tau, adding strat aerosols on top of tropospheric ones
+    DO band=1, config%n_bands_sw
+      WHERE (stratomask.GT.0.999999)
+!--strat aerosols are added to index 2 : natural and anthropogenic aerosols for bands 1 to config%n_bands_sw 
+        cg_aero_sw_rrtm(:,:,2,band)  = ( cg_aero_sw_rrtm(:,:,2,band)*piz_aero_sw_rrtm(:,:,2,band)*tau_aero_sw_rrtm(:,:,2,band) + &
+                                         cg_aer_strat(:,:,band)*piz_aer_strat(:,:,band)*tau_aer_strat(:,:,band) ) /              &
+                                    MAX( piz_aero_sw_rrtm(:,:,2,band)*tau_aero_sw_rrtm(:,:,2,band) +                             &
+                                         piz_aer_strat(:,:,band)*tau_aer_strat(:,:,band), 1.e-15 )
+        piz_aero_sw_rrtm(:,:,2,band) = ( piz_aero_sw_rrtm(:,:,2,band)*tau_aero_sw_rrtm(:,:,2,band) +                             &
+                                         piz_aer_strat(:,:,band)*tau_aer_strat(:,:,band) ) /                                     &
+                                    MAX( tau_aero_sw_rrtm(:,:,2,band) + tau_aer_strat(:,:,band), 1.e-15 )
+        tau_aero_sw_rrtm(:,:,2,band)  = tau_aero_sw_rrtm(:,:,2,band) + tau_aer_strat(:,:,band)
+     ENDWHERE
+  ENDDO
+  ENDIF
+
+!--total vertical aod at 10 um
+!--this is approximated from band 7 of ECRAD (9.73 µm)
+    band=7
+    DO i=1, klon
+    DO k=1, klev
+      IF (stratomask(i,k).GT.0.999999) THEN
+        DO wave=1, config%n_bands_lw
+          tausum_aero(i,config%n_bands_sw+wave,id_STRAT_phy)=tausum_aero(i,config%n_bands_sw+wave,id_STRAT_phy)+taulw_aer_strat(i,k,band)
+        ENDDO
+      ENDIF
+    ENDDO
+    ENDDO
+
+    IF (.NOT. ok_volcan) THEN
+!--this is the default case 
+!--stratospheric aerosols are added to both index 2 and 1
+    DO band=1, config%n_bands_lw
+      WHERE (stratomask.GT.0.999999)
+! add ThL
+        cg_aero_lw_rrtm(:,:,2,band)  = ( cg_aero_lw_rrtm(:,:,2,band)*piz_aero_lw_rrtm(:,:,2,band)*tau_aero_lw_rrtm(:,:,2,band) + &
+                                         cglw_aer_strat(:,:,band)*pizlw_aer_strat(:,:,band)*taulw_aer_strat(:,:,band) ) /        &
+                                    MAX( piz_aero_lw_rrtm(:,:,2,band)*tau_aero_lw_rrtm(:,:,2,band) +                             &
+                                         pizlw_aer_strat(:,:,band)*taulw_aer_strat(:,:,band), 1.e-15 )
+        piz_aero_lw_rrtm(:,:,2,band) = ( piz_aero_lw_rrtm(:,:,2,band)*tau_aero_lw_rrtm(:,:,2,band) +                             &
+                                         pizlw_aer_strat(:,:,band)*taulw_aer_strat(:,:,band) ) /                                 &
+                                    MAX( tau_aero_lw_rrtm(:,:,2,band) + taulw_aer_strat(:,:,band), 1.e-15 )
+        cg_aero_lw_rrtm(:,:,1,band)  = ( cg_aero_lw_rrtm(:,:,1,band)*piz_aero_lw_rrtm(:,:,1,band)*tau_aero_lw_rrtm(:,:,1,band) + &
+                                         cglw_aer_strat(:,:,band)*pizlw_aer_strat(:,:,band)*taulw_aer_strat(:,:,band) ) /        &
+                                    MAX( piz_aero_lw_rrtm(:,:,1,band)*tau_aero_lw_rrtm(:,:,1,band) +                             &
+                                         pizlw_aer_strat(:,:,band)*taulw_aer_strat(:,:,band), 1.e-15 )
+        piz_aero_lw_rrtm(:,:,1,band) = ( piz_aero_lw_rrtm(:,:,1,band)*tau_aero_lw_rrtm(:,:,1,band) +                             &
+                                         pizlw_aer_strat(:,:,band)*taulw_aer_strat(:,:,band) ) /                                 &
+                                    MAX( tau_aero_lw_rrtm(:,:,1,band) + taulw_aer_strat(:,:,band), 1.e-15 )
+! end add ThL
+        tau_aero_lw_rrtm(:,:,2,band)  = tau_aero_lw_rrtm(:,:,2,band) + taulw_aer_strat(:,:,band)
+        tau_aero_lw_rrtm(:,:,1,band)  = tau_aero_lw_rrtm(:,:,1,band) + taulw_aer_strat(:,:,band)
+      ENDWHERE
+    ENDDO
+!
+    ELSE
+!
+! mod ThL
+!--this is the VOLMIP case
+    DO band=1, config%n_bands_lw
+      WHERE (stratomask.GT.0.999999)
+!--stratospheric aerosols are not added to index 1 
+!--and we copy index 2 in index 1 because we want the same dust aerosol LW properties as above
+        cg_aero_lw_rrtm(:,:,1,band)  = cg_aero_lw_rrtm(:,:,2,band)
+        piz_aero_lw_rrtm(:,:,1,band) = piz_aero_lw_rrtm(:,:,2,band)
+        tau_aero_lw_rrtm(:,:,1,band) = tau_aero_lw_rrtm(:,:,2,band)
+
+!--stratospheric aerosols are only added to index 2
+        cg_aero_lw_rrtm(:,:,2,band)  = (cg_aero_lw_rrtm(:,:,2,band)*piz_aero_lw_rrtm(:,:,2,band)*tau_aero_lw_rrtm(:,:,2,band) + &
+                                        cglw_aer_strat(:,:,band)*pizlw_aer_strat(:,:,band)*taulw_aer_strat(:,:,band)) /         &
+                                        MAX( piz_aero_lw_rrtm(:,:,2,band)*tau_aero_lw_rrtm(:,:,2,band) +                        &
+                                        pizlw_aer_strat(:,:,band)*taulw_aer_strat(:,:,band), 1.e-15 )
+        piz_aero_lw_rrtm(:,:,2,band) = (piz_aero_lw_rrtm(:,:,2,band)*tau_aero_lw_rrtm(:,:,2,band) +                             &
+                                        pizlw_aer_strat(:,:,band)*taulw_aer_strat(:,:,band) ) /                                 &
+                                        MAX( tau_aero_lw_rrtm(:,:,2,band) + taulw_aer_strat(:,:,band), 1.e-15 )
+        tau_aero_lw_rrtm(:,:,2,band)  = tau_aero_lw_rrtm(:,:,2,band) + taulw_aer_strat(:,:,band)
+      ENDWHERE
+    ENDDO
+    ENDIF
+! end mod ThL
+
+!--default SSA value if there is no aerosol
+!--to avoid 0 values that seems to cause some problem to RRTM
+    WHERE (tau_aero_sw_rrtm.LT.1.e-14)
+      piz_aero_sw_rrtm = 1.0
+    ENDWHERE
+
+!--in principle this should not be necessary 
+!--as these variables have min values already but just in case
+!--put 1e-15 min value to both SW and LW AOD
+    tau_aero_sw_rrtm = MAX(tau_aero_sw_rrtm,1.e-15)
+    tau_aero_lw_rrtm = MAX(tau_aero_lw_rrtm,1.e-15)
+
+END SUBROUTINE readaerosolstrato_ecrad
