/[lmdze]/trunk/Sources/phylmd/Mobidic/regr_pr_av.f
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trunk/libf/phylmd/Mobidic/regr_pr_coefoz.f90 revision 19 by guez, Thu Aug 7 15:46:20 2008 UTC trunk/Sources/phylmd/Mobidic/regr_pr_av.f revision 134 by guez, Wed Apr 29 15:47:56 2015 UTC
# Line 1  Line 1 
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, v3)
8    
9        ! "regr_pr_av" stands for "regrid pressure averaging".
10    
11        ! This procedure reads a 2D latitude-pressure field from a NetCDF
12        ! file, at a given day, regrids this field in pressure to the LMDZ
13        ! vertical grid and packs it to the LMDZ horizontal "physics"
14        ! grid.
15    
16        ! We assume that, in the input file, the field has 3 dimensions:
17        ! latitude, pressure, julian day.
18    
19        ! 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    
     ! "regr_pr_av_coefoz" stands for "regrid pressure averaging  
     ! coefficient ozone".  
23      ! The target vertical LMDZ grid is the grid of layer boundaries.      ! The target vertical LMDZ grid is the grid of layer boundaries.
24      ! The input data does not depend on longitude, but the pressure      ! Regridding in pressure is done by averaging a step function of 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.  
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
     use netcdf95, only: nf95_inq_varid, handle_err  
     use netcdf, only: nf90_get_var  
28      use grid_change, only: dyn_phy      use grid_change, only: dyn_phy
29      use numer_rec, only: assert      use netcdf95, only: nf95_inq_varid, nf95_get_var
30        use nr_util, only: assert
31        use numer_rec_95, only: regr1_step_av
32      use press_coefoz_m, only: press_in_edg      use press_coefoz_m, only: press_in_edg
     use regr1_step_av_m, only: regr1_step_av  
33      use pressure_var, only: p3d      use pressure_var, only: p3d
34    
35      integer, intent(in):: ncid ! NetCDF ID of the file      integer, intent(in):: ncid ! NetCDF ID of the file
# Line 38  contains Line 37  contains
37      integer, intent(in):: julien ! jour julien, 1 <= julien <= 360      integer, intent(in):: julien ! jour julien, 1 <= julien <= 360
38    
39      real, intent(out):: v3(:, :) ! (klon, llm)      real, intent(out):: v3(:, :) ! (klon, llm)
40      ! (ozone coefficient from Mobidic on the "physics" grid)      ! regridded field on the partial "physics" grid
41      ! ("v3(i, k)" is at longitude "xlon(i)", latitude      ! "v3(i, k)" is at longitude "xlon(i)", latitude "xlat(i)", in
42      ! "xlat(i)", middle of layer "k".)      ! layer "k".
43    
44      ! Variables local to the procedure:      ! Variables local to the procedure:
45      integer varid, ncerr  
46      integer i, j, k      integer varid ! for NetCDF
47    
48      real  v1(jjm + 1, size(press_in_edg) - 1)      real  v1(jjm + 1, size(press_in_edg) - 1)
49      ! (ozone coefficient from "coefoz_LMDZ.nc" at day "julien")      ! input field at day "julien"
50      ! ("v1(j, k)" is at latitude "rlatu(j)" and for      ! "v1(j, k)" is at latitude "rlatu(j)" and for
51      ! pressure interval "[press_in_edg(k), press_in_edg(k+1)]".)      ! pressure interval "[press_in_edg(k), press_in_edg(k+1)]".
52    
53      real v2(iim + 1, jjm + 1, llm)      real v2(iim + 1, jjm + 1, llm)
54      ! (ozone coefficient from Mobidic on the "dynamics" grid)      ! regridded field on the "dynamics" grid
55      ! "v2(i, j, k)" is at longitude "rlonv(i)", latitude      ! ("v2(i, j, k)" is at longitude "rlonv(i)", latitude
56      ! "rlatu(j)", middle of layer "k".)      ! "rlatu(j)" and for pressure interval "[p3d(i, j, k+1), p3d(i, j, k)]".)
57    
58        integer i, j, k
59    
60      !--------------------------------------------      !--------------------------------------------
61    
62      call assert(shape(v3) == (/klon, llm/), "regr_pr_av_coefoz")      call assert(shape(v3) == (/klon, llm/), "regr_pr_av")
63    
64      call nf95_inq_varid(ncid, name, varid)      call nf95_inq_varid(ncid, name, varid)
65    
66      ! Get data at the right day from the input file:      ! Get data at the right day from the input file:
67      ncerr = nf90_get_var(ncid, varid, v1, start=(/1, 1, julien/))      call nf95_get_var(ncid, varid, v1, start=(/1, 1, julien/))
68      call handle_err("regr_pr_av_coefoz nf90_get_var " // name, ncerr, ncid)      ! Latitudes are in ascending order in the input file while
69      ! Latitudes are in increasing order in the input file while      ! "rlatu" is in descending order so we need to invert order:
     ! "rlatu" is in decreasing order so we need to invert order:  
70      v1 = v1(jjm+1:1:-1, :)      v1 = v1(jjm+1:1:-1, :)
71    
72      ! Regrid in pressure at each horizontal position:      ! Regrid in pressure at each horizontal position:
# Line 76  contains Line 76  contains
76               v2(i, j, llm:1:-1) &               v2(i, j, llm:1:-1) &
77                    = regr1_step_av(v1(j, :), press_in_edg, &                    = regr1_step_av(v1(j, :), press_in_edg, &
78                    p3d(i, j, llm+1:1:-1))                    p3d(i, j, llm+1:1:-1))
79               ! (invert order of indices because "p3d" is decreasing)               ! (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.  
   
     use dimens_m, only: iim, jjm, llm  
     use dimphy, only: klon  
     use netcdf95, only: nf95_inq_varid, handle_err  
     use netcdf, only: nf90_get_var  
     use grid_change, only: dyn_phy  
     use numer_rec, only: assert  
     use press_coefoz_m, only: plev  
     use regr1_lint_m, only: regr1_lint  
     use pressure_var, only: pls  
   
     integer, intent(in):: ncid ! NetCDF ID of the file  
     character(len=*), intent(in):: name ! of the NetCDF variable  
     integer, intent(in):: julien ! jour julien, 1 <= julien <= 360  
   
     real, intent(in):: top_value  
     ! (extra value of ozone coefficient at 0 pressure)  
   
     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)", middle of layer "k".)  
   
     ! Variables local to the procedure:  
     integer varid, ncerr  
     integer i, j, k  
   
     real  v1(jjm + 1, 0:size(plev))  
     ! (ozone coefficient from "coefoz_LMDZ.nc" at day "julien")  
     ! ("v1(j, k >=1)" is at latitude "rlatu(j)" and pressure "plev(k)".)  
   
     real v2(iim + 1, jjm + 1, llm)  
     ! (ozone coefficient from Mobidic on the "dynamics" grid)  
     ! "v2(i, j, k)" is at longitude "rlonv(i)", latitude  
     ! "rlatu(j)", middle of layer "k".)  
   
     !--------------------------------------------  
   
     call assert(shape(v3) == (/klon, llm/), "regr_pr_int_coefoz")  
   
     call nf95_inq_varid(ncid, name, varid)  
   
     ! Get data at the right day from the input file:  
     ncerr = nf90_get_var(ncid, varid, v1(:, 1:), start=(/1, 1, julien/))  
     call handle_err("regr_pr_int_coefoz nf90_get_var " // name, ncerr, ncid)  
     ! Latitudes are in increasing order in the input file while  
     ! "rlatu" is in decreasing order so we need to invert order:  
     v1(:, 1:) = v1(jjm+1:1:-1, 1:)  
   
     ! Complete "v1" with the value at 0 pressure:  
     v1(:, 0) = top_value  
   
     ! 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_lint(v1(j, :), (/0., plev/), pls(i, j, llm:1:-1))  
              ! (invert order of indices because "pls" is decreasing)  
80            end if            end if
81         end do         end do
82      end do      end do
83    
84      forall (k = 1:llm) v3(:, k) = pack(v2(:, :, k), dyn_phy)      forall (k = 1:llm) v3(:, k) = pack(v2(:, :, k), dyn_phy)
85    
86    end subroutine regr_pr_int_coefoz    end subroutine regr_pr_av
87    
88  end module regr_pr_coefoz  end module regr_pr_av_m
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