/[lmdze]/trunk/phylmd/Mobidic/regr_pr_av.f
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trunk/libf/phylmd/Mobidic/regr_pr_coefoz.f90 revision 61 by guez, Fri Apr 20 14:58:43 2012 UTC trunk/Sources/phylmd/Mobidic/regr_pr_av.f revision 162 by guez, Fri Jul 24 16:54:30 2015 UTC
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1  module regr_pr_coefoz  module regr_pr_av_m
   
   ! Both procedures of this module read a single Mobidic ozone  
   ! coefficient from "coefoz_LMDZ.nc", at the current day, regrid this  
   ! coefficient in pressure to the LMDZ vertical grid and pack it to the LMDZ  
   ! horizontal "physics" grid.  
   ! The input data is a 2D latitude -- pressure field.  
   ! The target horizontal LMDZ grid is the "scalar" grid: "rlonv", "rlatu".  
   ! We assume that the input data is already on the LMDZ "rlatu"  
   ! latitude grid.  
2    
3    implicit none    implicit none
4    
5  contains  contains
6    
7    subroutine regr_pr_av_coefoz(ncid, name, julien, v3)    subroutine regr_pr_av(ncid, name, julien, paprs, v3)
8    
9      ! "regr_pr_av_coefoz" stands for "regrid pressure averaging      ! "regr_pr_av" stands for "regrid pressure averaging".
     ! coefficient ozone".  
     ! The target vertical LMDZ grid is the grid of layer boundaries.  
     ! The input data does not depend on longitude, but the pressure  
     ! at LMDZ layers does.  
     ! Therefore, the values on the LMDZ grid do depend on longitude.  
     ! Regridding in pressure is done by averaging a step function of pressure.  
10    
11      use dimens_m, only: iim, jjm, llm      ! This procedure reads a 2D latitude-pressure field from a NetCDF
12      use dimphy, only: klon      ! file, at a given day, regrids this field in pressure to the LMDZ
13      use grid_change, only: dyn_phy      ! vertical grid and packs it to the LMDZ horizontal "physics"
14      use netcdf, only: nf90_get_var      ! grid.
     use netcdf95, only: nf95_inq_varid, handle_err  
     use nr_util, only: assert  
     use numer_rec_95, only: regr1_step_av  
     use press_coefoz_m, only: press_in_edg  
     use pressure_var, only: p3d  
15    
16      integer, intent(in):: ncid ! NetCDF ID of the file      ! We assume that, in the input file, the field has 3 dimensions:
17      character(len=*), intent(in):: name ! of the NetCDF variable      ! latitude, pressure, julian day.
     integer, intent(in):: julien ! jour julien, 1 <= julien <= 360  
   
     real, intent(out):: v3(:, :) ! (klon, llm)  
     ! (ozone coefficient from Mobidic on the "physics" grid)  
     ! ("v3(i, k)" is at longitude "xlon(i)", latitude  
     ! "xlat(i)", in layer "k".)  
   
     ! Variables local to the procedure:  
   
     integer varid, ncerr ! for NetCDF  
   
     real  v1(jjm + 1, size(press_in_edg) - 1)  
     ! (ozone coefficient from "coefoz_LMDZ.nc" at day "julien")  
     ! ("v1(j, k)" is at latitude "rlatu(j)" and for  
     ! pressure interval "[press_in_edg(k), press_in_edg(k+1)]".)  
   
     real v2(iim + 1, jjm + 1, llm)  
     ! (ozone coefficient on the "dynamics" grid)  
     ! ("v2(i, j, k)" is at longitude "rlonv(i)", latitude  
     ! "rlatu(j)" and for pressure interval "[p3d(i, j, k+1), p3d(i, j, k)]".)  
   
     integer i, j, k  
   
     !--------------------------------------------  
18    
19      call assert(shape(v3) == (/klon, llm/), "regr_pr_av_coefoz")      ! We assume that the input field is already on the LMDZ "rlatu"
20        ! latitudes, except that latitudes are in ascending order in the
21        ! input file.
22    
23      call nf95_inq_varid(ncid, name, varid)      ! The target vertical LMDZ grid is the grid of layer boundaries.
24        ! Regridding in pressure is done by averaging a step function of pressure.
     ! Get data at the right day from the input file:  
     ncerr = nf90_get_var(ncid, varid, v1, start=(/1, 1, julien/))  
     call handle_err("regr_pr_av_coefoz nf90_get_var " // name, ncerr, ncid)  
     ! Latitudes are in ascending order in the input file while  
     ! "rlatu" is in descending order so we need to invert order:  
     v1 = v1(jjm+1:1:-1, :)  
   
     ! Regrid in pressure at each horizontal position:  
     do j = 1, jjm + 1  
        do i = 1, iim  
           if (dyn_phy(i, j)) then  
              v2(i, j, llm:1:-1) &  
                   = regr1_step_av(v1(j, :), press_in_edg, &  
                   p3d(i, j, llm+1:1:-1))  
              ! (invert order of indices because "p3d" is in descending order)  
           end if  
        end do  
     end do  
   
     forall (k = 1:llm) v3(:, k) = pack(v2(:, :, k), dyn_phy)  
   
   end subroutine regr_pr_av_coefoz  
   
   !***************************************************************  
   
   subroutine regr_pr_int_coefoz(ncid, name, julien, top_value, v3)  
   
     ! "regr_pr_int_coefoz" stands for "regrid pressure interpolation  
     ! coefficient ozone".  
     ! The target vertical LMDZ grid is the grid of mid-layers.  
     ! The input data does not depend on longitude, but the pressure  
     ! at LMDZ mid-layers does.  
     ! Therefore, the values on the LMDZ grid do depend on longitude.  
     ! Regridding is by linear interpolation.  
25    
26      use dimens_m, only: iim, jjm, llm      use dimens_m, only: iim, jjm, llm
27      use dimphy, only: klon      use dimphy, only: klon
28      use grid_change, only: dyn_phy      use grid_change, only: dyn_phy
29      use netcdf, only: nf90_get_var      use netcdf95, only: nf95_inq_varid, nf95_get_var
     use netcdf95, only: nf95_inq_varid, handle_err  
30      use nr_util, only: assert      use nr_util, only: assert
31      use numer_rec_95, only: regr1_lint      use numer_rec_95, only: regr1_step_av
32      use press_coefoz_m, only: plev      use press_coefoz_m, only: press_in_edg
     use pressure_var, only: pls  
33    
34      integer, intent(in):: ncid ! NetCDF ID of the file      integer, intent(in):: ncid ! NetCDF ID of the file
35      character(len=*), intent(in):: name ! of the NetCDF variable      character(len=*), intent(in):: name ! of the NetCDF variable
36      integer, intent(in):: julien ! jour julien, 1 <= julien <= 360      integer, intent(in):: julien ! jour julien, 1 <= julien <= 360
37    
38      real, intent(in):: top_value      real, intent(in):: paprs(:, :) ! (klon, llm + 1)
39      ! (extra value of ozone coefficient at 0 pressure)      ! (pression pour chaque inter-couche, en Pa)
40    
41      real, intent(out):: v3(:, :) ! (klon, llm)      real, intent(out):: v3(:, :) ! (klon, llm)
42      ! (ozone coefficient from Mobidic on the "physics" grid)      ! regridded field on the partial "physics" grid
43      ! ("v3(i, k)" is at longitude "xlon(i)", latitude      ! "v3(i, k)" is at longitude "xlon(i)", latitude "xlat(i)", in
44      ! "xlat(i)", middle of layer "k".)      ! layer "k".
45    
46      ! Variables local to the procedure:      ! Variables local to the procedure:
47    
48      integer varid, ncerr ! for NetCDF      integer varid ! for NetCDF
49    
50      real  v1(jjm + 1, 0:size(plev))      real v1(jjm + 1, size(press_in_edg) - 1)
51      ! (ozone coefficient from "coefoz_LMDZ.nc" at day "julien")      ! input field at day "julien"
52      ! ("v1(j, k >=1)" is at latitude "rlatu(j)" and pressure "plev(k)".)      ! "v1(j, k)" is at latitude "rlatu(j)" and for
53        ! pressure interval "[press_in_edg(k), press_in_edg(k+1)]".
54      real v2(iim + 1, jjm + 1, llm)  
55      ! (ozone coefficient on the "dynamics" grid)      real v2(klon, size(press_in_edg) - 1)
56      ! "v2(i, j, k)" is at longitude "rlonv(i)", latitude      ! Field on the "physics" horizontal grid. "v2(i, k)" is at
57      ! "rlatu(j)" and pressure "pls(i, j, k)".)      ! longitude "xlon(i)", latitude "xlat(i)" and for pressure
58        ! interval "[press_in_edg(k), press_in_edg(k+1)]".)
59    
60      integer i, j, k      integer i, k
61    
62      !--------------------------------------------      !--------------------------------------------
63    
64      call assert(shape(v3) == (/klon, llm/), "regr_pr_int_coefoz")      call assert(shape(v3) == (/klon, llm/), "regr_pr_av klon llm")
65        call assert(shape(paprs) == (/klon, llm+1/), "regr_pr_av paprs")
66    
67      call nf95_inq_varid(ncid, name, varid)      call nf95_inq_varid(ncid, name, varid)
68    
69      ! Get data at the right day from the input file:      ! Get data at the right day from the input file:
70      ncerr = nf90_get_var(ncid, varid, v1(:, 1:), start=(/1, 1, julien/))      call nf95_get_var(ncid, varid, v1, start=(/1, 1, julien/))
     call handle_err("regr_pr_int_coefoz nf90_get_var " // name, ncerr, ncid)  
71      ! Latitudes are in ascending order in the input file while      ! Latitudes are in ascending order in the input file while
72      ! "rlatu" is in descending order so we need to invert order:      ! "rlatu" is in descending order so we need to invert order:
73      v1(:, 1:) = v1(jjm+1:1:-1, 1:)      v1 = v1(jjm+1:1:-1, :)
74    
75      ! Complete "v1" with the value at 0 pressure:      forall (k = 1:size(press_in_edg) - 1) v2(:, k) = pack(spread(v1(:, k), &
76      v1(:, 0) = top_value           dim = 1, ncopies = iim + 1), dyn_phy)
77    
78      ! Regrid in pressure at each horizontal position:      ! Regrid in pressure at each horizontal position:
79      do j = 1, jjm + 1      do i = 1, klon
80         do i = 1, iim         v3(i, llm:1:-1) = regr1_step_av(v2(i, :), press_in_edg, &
81            if (dyn_phy(i, j)) then              paprs(i, llm+1:1:-1))
82               v2(i, j, llm:1:-1) &         ! (invert order of indices because "paprs" is in descending order)
                   = regr1_lint(v1(j, :), (/0., plev/), pls(i, j, llm:1:-1))  
              ! (invert order of indices because "pls" is in descending order)  
           end if  
        end do  
83      end do      end do
84    
85      forall (k = 1:llm) v3(:, k) = pack(v2(:, :, k), dyn_phy)    end subroutine regr_pr_av
   
   end subroutine regr_pr_int_coefoz  
86    
87  end module regr_pr_coefoz  end module regr_pr_av_m
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