!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!! !!
!! GNU General Public License !!
!! !!
!! This file is part of the Flexible Modeling System (FMS). !!
!! !!
!! FMS is free software; you can redistribute it and/or modify !!
!! it and are expected to follow the terms of the GNU General Public !!
!! License as published by the Free Software Foundation. !!
!! !!
!! FMS is distributed in the hope that it will be useful, !!
!! but WITHOUT ANY WARRANTY; without even the implied warranty of !!
!! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the !!
!! GNU General Public License for more details. !!
!! !!
!! You should have received a copy of the GNU General Public License !!
!! along with FMS; if not, write to: !!
!! Free Software Foundation, Inc. !!
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!! or see: !!
!! http://www.gnu.org/licenses/gpl.txt !!
!! !!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
module vgrid_mod
!-----------------------------------------------------------------------
! GNU General Public License
!
! This program is free software; you can redistribute it and/or modify it and
! are expected to follow the terms of the GNU General Public License
! as published by the Free Software Foundation; either version 2 of
! the License, or (at your option) any later version.
!
! MOM is distributed in the hope that it will be useful, but WITHOUT
! ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
! License for more details.
!
! For the full text of the GNU General Public License,
! write to: Free Software Foundation, Inc.,
! 675 Mass Ave, Cambridge, MA 02139, USA.
! or see: http://www.gnu.org/licenses/gpl.html
!-----------------------------------------------------------------------
! Z. Liang
! S. M. Griffies
!
!
!
! vgrid_mod Generate vertical grid.
!
!
! The grid file contains the following information,
!
!
! zt = depth of tracer points
! zb = depth of tracer_boundaries
!
! +---------------+
! | |
! | |
! | |
! | |
! | +zt_k |
! | |
! | |
! | |
! +------+zb_k----+
!
!
!
use mpp_mod, only : mpp_pe, mpp_root_pe, mpp_error, FATAL, NOTE, mpp_chksum
use mpp_mod, only : lowercase
use mpp_io_mod, only : MPP_NETCDF, MPP_RDONLY, MPP_ASCII, MPP_MULTI, MPP_SINGLE
use mpp_io_mod, only : mpp_open, mpp_write_meta, mpp_write, axistype, mpp_close
use mpp_io_mod, only : mpp_get_info, mpp_get_atts, mpp_get_axes, mpp_get_axis_data
use fms_mod, only : write_version_number, open_namelist_file, string
use fms_mod, only : file_exist, close_file, check_nml_error, stdlog, stdout
use grids_type_mod, only : vgrid_data_type
use grids_util_mod, only : make_axis, get_file_unit
use constants_mod, only : PI
implicit none
private
integer, parameter :: maxlen=10000,maxbounds=11
!------ namelist interface ---------------------------------------------
!------ specify a spherical grid resolution in depth
integer :: nzdepths = 0
real, dimension(maxbounds) :: z_depth, dz_depth
logical :: read_my_grid = .false.
character(len=128) :: my_grid_file = 'my_vgrid'
logical :: debug = .false.
character(len=24) :: z_axis_t = 'zt_k'
character(len=24) :: z_axis_b = 'zw_k'
integer :: z_axis_b_offset = 1
!
!
!
! number of depth regions for varying resolution
!
!
! boundaries for defining depth regions of varying resolution
!
!
! nominal resolution of depth regions
!
!
! stretch factor of vertical grids.
!
!
! read ASCII grid information for supplying user-defined grids.
!
!
! Name of ASCII or netcdf user grid file
!
!
! Name of z_t axis, if the file is netcdf
!
!
! Name of z_b axis, if the file is netcdf
!
!
! offset of z_b axis, if the file is netcdf
! 1 corresponds to an axis starting at k=0, z_b=0 (mom3)
!
!
! control standard output.
!
!
namelist /vgrid_nml/ nzdepths, z_depth, dz_depth, read_my_grid, my_grid_file, debug,&
z_axis_b_offset, z_axis_t, z_axis_b
!-----------------------------------------------------------------------
!--------private data---------------------------------------------------
integer :: nk !number of grid cells in depth
real, dimension(:), allocatable :: zt0, zb0
type(axistype),save :: axis_zt, axis_zb
logical :: module_is_initialized = .false.
!---------version information-------------------------------------------
character(len=128) :: version = '$Id: vgrid.f90,v 13.0 2006/03/28 21:45:06 fms Exp $'
character(len=128) :: tagname = '$Name: mom4p1_pubrel_dec2009_nnz $'
!---------public interface----------------------------------------------
public :: generate_vgrid, vgrid_init, vgrid_end, write_vgrid_meta, write_vgrid_data
contains
!#######################################################################
!
!
! Initialization routine.
!
!
! Read namelist, write out version and namelist informaiton and generate depth resolution.
!
!
! call vgrid_init ( )
!
!
subroutine vgrid_init
integer :: unit, ierr, io, k, pe
integer :: ndim, nvar, natt, ntime, len, i, nkb
character(len=128) :: txt
character(len=128) :: name
type(axistype), allocatable :: axes(:)
logical :: found_z_t, found_z_b
z_depth(:) = 0.0
dz_depth(:) = 0.0
!---- read namelist --------------------------------------------------
unit = open_namelist_file ( )
ierr=1
do while (ierr /= 0)
read (unit, nml=vgrid_nml, iostat=io, end=10)
ierr = check_nml_error(io,'vgrid_nml')
enddo
10 call close_file (unit)
!--- write version info and namelist to logfile ----------------------
call write_version_number(version,tagname)
if (mpp_pe() == mpp_root_pe()) then
write (stdout(), nml=vgrid_nml)
endif
allocate (zt0(0:maxlen), zb0(0:maxlen))
if (read_my_grid) then
nk=0
nkb=0
if(.not. file_exist(trim(my_grid_file))) &
call mpp_error(FATAL,'vgrid_mod: file '//trim(my_grid_file)//' does not exist')
len = len_trim(my_grid_file)
if(my_grid_file(len-2:len) == '.nc') then
call mpp_open(unit,trim(my_grid_file),action=MPP_RDONLY,form=MPP_NETCDF,threading=MPP_MULTI,fileset=MPP_SINGLE)
call mpp_get_info(unit, ndim, nvar, natt, ntime)
allocate(axes(ndim))
call mpp_get_axes(unit, axes)
found_z_t = .false.; found_z_b = .false.
do i=1, ndim
call mpp_get_atts(axes(i),name=name,len=len)
if (trim(lowercase(name)) .eq. trim(lowercase(z_axis_t))) then
found_z_t = .true.
nk = len
call mpp_get_axis_data(axes(i), zt0(1:nk) )
endif
if (trim(lowercase(name)) .eq. trim(lowercase(z_axis_b))) then
found_z_b = .true.
nkb = len
call mpp_get_axis_data(axes(i), zb0(1-z_axis_b_offset:nkb-z_axis_b_offset) )
endif
enddo
if(.not. found_z_t) call mpp_error(FATAL,'axis '//trim(z_axis_t)//' does not exist in file '//trim(my_grid_file) )
if(.not. found_z_b) call mpp_error(FATAL,'axis '//trim(z_axis_b)//' does not exist in file '//trim(my_grid_file) )
deallocate(axes)
call mpp_close(unit)
else
call mpp_open(unit,trim(my_grid_file),action=MPP_RDONLY,form=MPP_ASCII, &
threading=MPP_MULTI,fileset=MPP_SINGLE)
read(unit,*) txt ! header line (ignored)
read(unit,*) nk
read(unit,*) zt0(1:nk)
read(unit,*) txt ! header line (ignored)
read(unit,*)
read(unit,*) zb0(1:nk)
call mpp_close(unit)
endif
if (nk == 0) call mpp_error(FATAL,'vgrid_mod: error reading file '//trim(my_grid_file) )
else
write (stdout(),'(//,36x,a,/)') 'V G R I D G E N E R A T I O N'
!--- check namelist
if (nzdepths .lt. 2 ) then
call mpp_error(FATAL, 'vgrid_mod: nml "nzdepths" = '//trim(string(nzdepths))//' should be no less than 2')
endif
if (nzdepths .gt. maxbounds) then
call mpp_error(FATAL, 'vgrid_mod: maxbouds= '//trim(string(maxbounds))// &
' is less than nml nzdepths= '//trim(string(nzdepths)) )
endif
write (stdout(),'(/a)') 'Generating the vertical resolution for the computational domain:'
call make_axis('Z',maxlen, nzdepths,z_depth,dz_depth,zb0,zt0, nk,.false., .false.)
endif
! print out vgrid coordinates
write (stdout(),9103) nk
write (stdout(),9002) (zt0(k),k=1,nk)
write (stdout(),9104) nk
write (stdout(),9002) (zb0(k),k=1,nk)
! Compute a grid checksum
if(debug) then
write (stdout(),'(/)')
pe = mpp_pe()
write (stdout(),*) 'Vertical Grid checksum = ', mpp_chksum(zt0(1:nk),(/pe/))+&
mpp_chksum(zb0(1:nk),(/pe/))
write (stdout(),'(/)')
endif
module_is_initialized = .true.
return
9002 format (1x,10f10.2)
9101 format (/, a,i4,' in units of ',a,' as follows:')
9103 format (/,' Depth to T and U grid points (m): zt(k) k=1,',i3)
9104 format (/,' Depth to W grid points (m): zb(k) k=1,',i3)
end subroutine vgrid_init
!#######################################################################
!
!
! Generate vertical grid.
!
!
! call generate_vgrid (Vgrid)
!
!
! A derived-type variable that contains vertical grid information.
!
!
subroutine generate_vgrid (Vgrid)
type(vgrid_data_type), intent(inout) :: Vgrid
!--- allocate memory to data type ------------------------------------
allocate(Vgrid%zt(nk), Vgrid%zb(nk))
Vgrid%zt(:) = zt0(1:nk)
Vgrid%zb(:) = zb0(1:nk)
deallocate(zt0, zb0)
end subroutine generate_vgrid
!#######################################################################
!
!
! write the vertical grid data to netcdf file
!
!
! call write_vgrid_data (unit)
!
!
! The unit corresponding the output netcdf file. Always is returned by mpp_open.
!
!
subroutine write_vgrid_data (file)
character(len=*), intent(in) :: file
integer :: unit
if(mpp_pe() .ne. mpp_root_pe() ) return
unit = get_file_unit(file)
call mpp_write(unit,axis_zt)
call mpp_write(unit,axis_zb)
end subroutine write_vgrid_data
!#######################################################################
!
!
! Write out vertical grid meta data.
!
!
! call write_vgrid_meta(unit, Vgrid)
!
!
! The unit corresponding the output netcdf file. Always is returned by mpp_open.
!
!
! A derived-type variable that contains vertical grid information.
!
!
subroutine write_vgrid_meta(file, Vgrid)
character(len=*), intent(in) :: file
type(vgrid_data_type), intent(in) :: Vgrid
integer :: unit
if(mpp_pe() .ne. mpp_root_pe() ) return
unit = get_file_unit(file)
call mpp_write_meta(unit,axis_zt,'zt','meters','zt',&
data=Vgrid%zt(1:nk),cartesian='z',sense=-1)
call mpp_write_meta(unit,axis_zb,'zb','meters','zb',&
data=Vgrid%zb,cartesian='z',sense=-1)
return
end subroutine write_vgrid_meta
!#######################################################################
!
!
! Destruction routine.
!
!
! Deallocates memory used by "vgrid_data_type" variables.
!
!
! call vgrid_end ( Vgrid )
!
!
! A derived-type variable that contains vertical grid information.
!
!
subroutine vgrid_end(Vgrid)
type(vgrid_data_type), intent(inout) :: Vgrid
deallocate(Vgrid%zt, Vgrid%zb )
module_is_initialized = .false.
end subroutine vgrid_end
!#######################################################################
end module vgrid_mod