add GFSv16 dzmin change and changes for Dev/jcsda (#44)

* add GFSv16 dzmin change
* Add code changes in external_ic.F90 and fv_grid_tools.F90 for dev/jcsda, dycore PR #35

Co-authored-by: Jun Wang <junwang-noaa@users.noreply.github.com>
Co-authored-by: Dan Holdaway <dan.holdaway@nasa.govr>

Author: junwang-noaa

model/nh_utils.F90

@@ -66,7 +66,7 @@ module nh_utils_mod
    public sim3p0_solver, rim_2d
    public Riem_Solver_c
 
-   real, parameter:: dz_min = 2.
+   real, parameter:: dz_min = 6.
    real, parameter:: r3 = 1./3.
 
 CONTAINS 
@@ -198,14 +198,14 @@ subroutine update_dz_c(is, ie, js, je, km, ng, dt, dp0, zs, area, ut, vt, gz, ws
 ! Enforce monotonicity of height to prevent blowup
 !$OMP parallel do default(none) shared(is1,ie1,js1,je1,ws,zs,gz,rdt,km)
   do j=js1, je1
-     do i=is1, ie1
-        ws(i,j) = ( zs(i,j) - gz(i,j,km+1) ) * rdt
-     enddo
-     do k=km, 1, -1
+     do k=2, km+1
         do i=is1, ie1
-           gz(i,j,k) = max( gz(i,j,k), gz(i,j,k+1) + dz_min )
+           gz(i,j,k) = min( gz(i,j,k), gz(i,j,k-1) - dz_min )
         enddo
      enddo
+     do i=is1, ie1
+        ws(i,j) = ( zs(i,j) - gz(i,j,km+1) ) * rdt
+     enddo
   enddo
 
   end subroutine update_dz_c
@@ -312,15 +312,15 @@ subroutine update_dz_d(ndif, damp, hord, is, ie, js, je, km, ng, npx, npy, area,
 
 !$OMP parallel do default(none) shared(is,ie,js,je,km,ws,zs,zh,rdt)
   do j=js, je
-     do i=is,ie
-        ws(i,j) = ( zs(i,j) - zh(i,j,km+1) ) * rdt
-     enddo
-     do k=km, 1, -1
+     do k=2, km+1
         do i=is, ie
 ! Enforce monotonicity of height to prevent blowup
-           zh(i,j,k) = max( zh(i,j,k), zh(i,j,k+1) + dz_min )
+           zh(i,j,k) = min( zh(i,j,k), zh(i,j,k-1) - dz_min )
         enddo
      enddo
+     do i=is,ie
+        ws(i,j) = ( zs(i,j) - zh(i,j,km+1) ) * rdt
+     enddo
   enddo
 
   end subroutine update_dz_d

tools/external_ic.F90

@@ -148,7 +148,7 @@ module external_ic_mod
    use external_sst_mod,   only: i_sst, j_sst, sst_ncep
    use fms_mod,            only: file_exist, read_data, field_exist, write_version_number
    use fms_mod,            only: open_namelist_file, check_nml_error, close_file
-   use fms_mod,            only: get_mosaic_tile_file, read_data, error_mesg
+   use fms_mod,            only: get_mosaic_tile_file, error_mesg
    use fms_io_mod,         only: get_tile_string, field_size, free_restart_type
    use fms_io_mod,         only: restart_file_type, register_restart_field
    use fms_io_mod,         only: save_restart, restore_state, set_filename_appendix, get_global_att_value
@@ -197,10 +197,11 @@ module external_ic_mod
 
    real, parameter:: zvir = rvgas/rdgas - 1.
    real(kind=R_GRID), parameter :: cnst_0p20=0.20d0
-   real :: deg2rad
-   character (len = 80) :: source   ! This tells what the input source was for the data
+   real, parameter :: deg2rad = pi/180.
+   character (len = 80),public :: source   ! This tells what the input source was for the data
    character(len=27), parameter :: source_fv3gfs = 'FV3GFS GAUSSIAN NEMSIO FILE'
-  public get_external_ic, get_cubed_sphere_terrain
+   public get_external_ic, get_cubed_sphere_terrain
+   public remap_scalar, remap_dwinds
 
 ! version number of this module
 ! Include variable "version" to be written to log file.
@@ -999,8 +1000,6 @@ subroutine get_ncep_ic( Atm, fv_domain, nq )
       jsd = Atm%bd%jsd
       jed = Atm%bd%jed
 
-      deg2rad = pi/180.
-
       npz = Atm%npz
       call get_number_tracers(MODEL_ATMOS, num_tracers=ntracers, num_prog=ntprog)
       if(is_master()) write(*,*) 'ntracers = ', ntracers, 'ntprog = ',ntprog
@@ -1564,8 +1563,6 @@ subroutine get_ecmwf_ic( Atm, fv_domain )
       jsd = Atm%bd%jsd
       jed = Atm%bd%jed
 
-      deg2rad = pi/180.
-
       npz = Atm%npz
       call get_number_tracers(MODEL_ATMOS, num_tracers=ntracers, num_prog=ntprog)
       if(is_master()) write(*,*) 'ntracers = ', ntracers, 'ntprog = ',ntprog 

tools/fv_grid_tools.F90

@@ -629,7 +629,7 @@ subroutine init_grid(Atm, grid_name, grid_file, npx, npy, npz, ndims, nregions,
 
     if (Atm%neststruct%nested .or. ANY(Atm%neststruct%child_grids)) then
         grid_global => Atm%grid_global
-    else if( trim(grid_file) .NE. 'INPUT/grid_spec.nc') then
+    else if( trim(grid_file) .EQ. 'Inline') then
        allocate(grid_global(1-ng:npx  +ng,1-ng:npy  +ng,ndims,1:nregions))
     endif
 
@@ -683,7 +683,7 @@ subroutine init_grid(Atm, grid_name, grid_file, npx, npy, npz, ndims, nregions,
              ! still need to set up 
              call setup_aligned_nest(Atm)
           else
-           if(trim(grid_file) == 'INPUT/grid_spec.nc') then  
+           if(trim(grid_file) .NE. 'Inline') then
              call read_grid(Atm, grid_file, ndims, nregions, ng)
            else
             if (Atm%flagstruct%grid_type>=0) call gnomonic_grids(Atm%flagstruct%grid_type, npx-1, xs, ys)
@@ -1180,8 +1180,8 @@ subroutine init_grid(Atm, grid_name, grid_file, npx, npy, npz, ndims, nregions,
     enddo
 
     if (Atm%neststruct%nested .or. ANY(Atm%neststruct%child_grids)) then
-    nullify(grid_global)
-    else if( trim(grid_file) .NE. 'INPUT/grid_spec.nc') then
+       nullify(grid_global)
+    else if( trim(grid_file) .EQ. 'Inline') then
        deallocate(grid_global)
     endif