--- trunk/libf/phylmd/Mobidic/regr_pr_o3.f90	2008/07/25 19:59:34	13
+++ trunk/phylmd/Mobidic/regr_pr_o3.f	2018/03/20 09:35:59	265
@@ -4,22 +4,37 @@
 
 contains
 
-  subroutine regr_pr_o3(o3_mob_regr)
+  subroutine regr_pr_o3(p3d, o3_mob_regr)
 
     ! "regr_pr_o3" stands for "regrid pressure ozone".
     ! This procedure reads Mobidic ozone mole fraction from
     ! "coefoz_LMDZ.nc" at the initial day and regrids it in pressure.
+    ! Ozone mole fraction from "coefoz_LMDZ.nc" is a 2D latitude --
+    ! pressure variable.
+    ! The target horizontal LMDZ grid is the "scalar" grid: "rlonv", "rlatu".
+    ! The target vertical LMDZ grid is the grid of layer boundaries.
+    ! We assume that the input variable is already on the LMDZ "rlatu"
+    ! latitude grid.
+    ! The input variable does not depend on longitude, but the
+    ! pressure at LMDZ layers does.
+    ! Therefore, the values on the LMDZ grid do depend on longitude.
     ! Regridding is by averaging, assuming a step function.
-    ! We assume that, in the input file, the pressure levels are in hPa
-    ! and strictly increasing.
+    ! We assume that, in the input file, the pressure levels are in
+    ! hPa and strictly increasing.
 
-    use conf_gcm_m, only: dayref
-    use dimens_m, only: iim, jjm, llm
-    use netcdf95, only: nf95_open, nf95_close, nf95_inq_varid, handle_err, &
-         nf95_get_coord
+    use dimensions, only: iim, jjm, llm
+    use dynetat0_m, only: day_ref
+    use grid_change, only: dyn_phy
     use netcdf, only:  nf90_nowrite, nf90_get_var
-    use regr_pr, only: regr_pr_av
-    use numer_rec, only: assert
+    use netcdf95, only: nf95_open, nf95_close, nf95_inq_varid, handle_err, &
+         nf95_gw_var
+    use nr_util, only: assert
+    use numer_rec_95, only: regr1_step_av
+
+    REAL, intent(in):: p3d(:, :, :) ! (iim + 1, jjm + 1, llm+1) 
+    ! pressure at layer interfaces, in Pa
+    ! ("p3d(i, j, l)" is at longitude "rlonv(i)", latitude "rlatu(j)",
+    ! for interface "l")
 
     real, intent(out):: o3_mob_regr(:, :, :) ! (iim + 1, jjm + 1, llm)
     ! (ozone mole fraction from Mobidic adapted to the LMDZ grid)
@@ -28,7 +43,7 @@
 
     ! Variables local to the procedure:
 
-    real, pointer:: plev(:)
+    real, allocatable:: plev(:)
     ! (pressure levels of Mobidic data, in Pa, in strictly increasing order)
 
     real, allocatable:: press_in_edg(:)
@@ -37,20 +52,25 @@
 
     integer ncid, varid, ncerr ! for NetCDF
     integer n_plev ! number of pressure levels in Mobidic data
-    integer j
+    integer i, j
 
     real, allocatable:: r_mob(:, :)! (jjm + 1, n_plev)
-    ! (ozone mole fraction from Mobidic at day "dayref")
+    ! (ozone mole fraction from Mobidic at day "day_ref")
     ! (r_mob(j, k) is at latitude "rlatu(j)" and pressure level "plev(k)".)
 
     !------------------------------------------------------------
 
     print *, "Call sequence information: regr_pr_o3"
-    call assert(shape(o3_mob_regr) == (/iim + 1, jjm + 1, llm/), "regr_pr_o3")
+
+    call assert(shape(o3_mob_regr) == (/iim + 1, jjm + 1, llm/), &
+         "regr_pr_o3 o3_mob_regr")
+    call assert(shape(p3d) == (/iim + 1, jjm + 1, llm + 1/), &
+         "regr_pr_o3 p3d")
 
     call nf95_open("coefoz_LMDZ.nc", nf90_nowrite, ncid)
 
-    call nf95_get_coord(ncid, "plev", plev)
+    call nf95_inq_varid(ncid, "plev", varid)
+    call nf95_gw_var(ncid, varid, plev)
     ! Convert from hPa to Pa because "regr_pr_av" requires so:
     plev = plev * 100.
     n_plev = size(plev)
@@ -64,13 +84,11 @@
     ! (infinity, but any value guaranteed to be greater than the
     ! surface pressure would do)
 
-    deallocate(plev) ! pointer
-
     call nf95_inq_varid(ncid, "r_Mob", varid)
     allocate(r_mob(jjm + 1, n_plev))
 
     ! Get data at the right day from the input file:
-    ncerr = nf90_get_var(ncid, varid, r_mob, start=(/1, 1, dayref/))
+    ncerr = nf90_get_var(ncid, varid, r_mob, start=(/1, 1, day_ref/))
     call handle_err("nf90_get_var r_Mob", ncerr)
     ! Latitudes are in increasing order in the input file while
     ! "rlatu" is in decreasing order so we need to invert order:
@@ -78,7 +96,25 @@
 
     call nf95_close(ncid)
 
-    o3_mob_regr = regr_pr_av(r_mob, press_in_edg)
+    ! Regrid in pressure by averaging a step function of pressure:
+    do j = 1, jjm + 1
+       do i = 1, iim
+          if (dyn_phy(i, j)) then
+             o3_mob_regr(i, j, llm:1:-1) &
+                  = regr1_step_av(r_mob(j, :), press_in_edg, &
+                  p3d(i, j, llm+1:1:-1))
+             ! (invert order of indices because "p3d" is decreasing)
+          end if
+       end do
+    end do
+
+    ! Duplicate pole values on all longitudes:
+    o3_mob_regr(2:, 1, :) = spread(o3_mob_regr(1, 1, :), dim=1, ncopies=iim)
+    o3_mob_regr(2:, jjm + 1, :) &
+         = spread(o3_mob_regr(1, jjm + 1, :), dim=1, ncopies=iim)
+
+    ! Duplicate first longitude to last longitude:
+    o3_mob_regr(iim + 1, 2:jjm, :) = o3_mob_regr(1, 2:jjm, :)
 
   end subroutine regr_pr_o3