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time_interp_external.F90
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time_interp_external.F90
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!***********************************************************************
!* GNU Lesser General Public License
!*
!* This file is part of the GFDL Flexible Modeling System (FMS).
!*
!* FMS is free software: you can redistribute it and/or modify it under
!* the terms of the GNU Lesser General Public License as published by
!* the Free Software Foundation, either version 3 of the License, or (at
!* your option) any later version.
!*
!* 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 Lesser General Public
!* License along with FMS. If not, see <http://www.gnu.org/licenses/>.
!***********************************************************************
module time_interp_external_mod
#include <fms_platform.h>
!
!<CONTACT EMAIL="Matthew.Harrison@noaa.gov">M.J. Harrison</CONTACT>
!
!<REVIEWER EMAIL="hsimmons@iarc.uaf.edu">Harper Simmons</REVIEWER>
!
!<OVERVIEW>
! Perform I/O and time interpolation of external fields (contained in a file).
!</OVERVIEW>
!<DESCRIPTION>
! Perform I/O and time interpolation for external fields.
! Uses udunits library to calculate calendar dates and
! convert units. Allows for reading data decomposed across
! model horizontal grid using optional domain2d argument
!
! data are defined over data domain for domain2d data
! (halo values are NOT updated by this module)
!
!</DESCRIPTION>
!
!<NAMELIST NAME="time_interp_external_nml">
! <DATA NAME="num_io_buffers" TYPE="integer">
! size of record dimension for internal buffer. This is useful for tuning i/o performance
! particularly for large datasets (e.g. daily flux fields)
! </DATA>
!</NAMELIST>
use fms_mod, only : write_version_number
use mpp_mod, only : mpp_error,FATAL,WARNING,mpp_pe, stdout, stdlog, NOTE
use mpp_mod, only : input_nml_file
use mpp_io_mod, only : mpp_open, mpp_get_atts, mpp_get_info, MPP_NETCDF, MPP_MULTI, MPP_SINGLE,&
mpp_get_times, MPP_RDONLY, MPP_ASCII, default_axis,axistype,fieldtype,atttype, &
mpp_get_axes, mpp_get_fields, mpp_read, default_field, mpp_close, &
mpp_get_tavg_info, validtype, mpp_is_valid, mpp_get_file_name
use time_manager_mod, only : time_type, get_date, set_date, operator ( >= ) , operator ( + ) , days_in_month, &
operator( - ), operator ( / ) , days_in_year, increment_time, &
set_time, get_time, operator( > ), get_calendar_type, NO_CALENDAR
use get_cal_time_mod, only : get_cal_time
use mpp_domains_mod, only : domain2d, mpp_get_compute_domain, mpp_get_data_domain, &
mpp_get_global_domain, NULL_DOMAIN2D
use time_interp_mod, only : time_interp, time_interp_init
use axis_utils_mod, only : get_axis_cart, get_axis_modulo, get_axis_modulo_times
use fms_mod, only : lowercase, open_namelist_file, check_nml_error, close_file
use platform_mod, only: r8_kind
use horiz_interp_mod, only : horiz_interp, horiz_interp_type
implicit none
private
! Include variable "version" to be written to log file.
#include<file_version.h>
integer, parameter, public :: NO_REGION=0, INSIDE_REGION=1, OUTSIDE_REGION=2
integer, parameter, private :: modulo_year= 0001
integer, parameter, private :: LINEAR_TIME_INTERP = 1 ! not used currently
integer, parameter, public :: SUCCESS = 0, ERR_FIELD_NOT_FOUND = 1
integer, private :: max_fields = 100, max_files= 40
integer, private :: num_fields = 0, num_files=0
! denotes time intervals in file (interpreted from metadata)
integer, private :: num_io_buffers = 2 ! set -1 to read all records from disk into memory
logical, private :: module_initialized = .false.
logical, private :: debug_this_module = .false.
public init_external_field, time_interp_external, time_interp_external_init, &
time_interp_external_exit, get_external_field_size, get_time_axis, get_external_field_missing
public set_override_region, reset_src_data_region, get_external_field_axes
private find_buf_index,&
set_time_modulo
type, private :: ext_fieldtype
integer :: unit ! keep unit open when not reading all records
character(len=128) :: name, units
integer :: siz(4), ndim
type(domain2d) :: domain
type(axistype) :: axes(4)
type(time_type), dimension(:), pointer :: time =>NULL() ! midpoint of time interval
type(time_type), dimension(:), pointer :: start_time =>NULL(), end_time =>NULL()
type(fieldtype) :: field ! mpp_io type
type(time_type), dimension(:), pointer :: period =>NULL()
logical :: modulo_time ! denote climatological time axis
real, dimension(:,:,:,:), pointer :: data =>NULL() ! defined over data domain or global domain
logical, dimension(:,:,:,:), pointer :: mask =>NULL() ! defined over data domain or global domain
integer, dimension(:), pointer :: ibuf =>NULL() ! record numbers associated with buffers
real, dimension(:,:,:,:), pointer :: src_data =>NULL() ! input data buffer
type(validtype) :: valid ! data validator
integer :: nbuf
logical :: domain_present
real(DOUBLE_KIND) :: slope, intercept
integer :: isc,iec,jsc,jec
type(time_type) :: modulo_time_beg, modulo_time_end
logical :: have_modulo_times, correct_leap_year_inconsistency
integer :: region_type
integer :: is_region, ie_region, js_region, je_region
integer :: is_src, ie_src, js_src, je_src
integer :: tdim
integer :: numwindows
logical, dimension(:,:), pointer :: need_compute=>NULL()
real :: missing ! missing value
end type ext_fieldtype
type, private :: filetype
character(len=128) :: filename = ''
integer :: unit = -1
end type filetype
interface time_interp_external
module procedure time_interp_external_0d
module procedure time_interp_external_2d
module procedure time_interp_external_3d
end interface
integer :: outunit
type(ext_fieldtype), save, private, pointer :: field(:) => NULL()
type(filetype), save, private, pointer :: opened_files(:) => NULL()
!Balaji: really should use field%missing
integer, private, parameter :: dk = DOUBLE_KIND
real(DOUBLE_KIND), private, parameter :: time_interp_missing=-1e99_dk
contains
! <SUBROUTINE NAME="time_interp_external_init">
!
! <DESCRIPTION>
! Initialize the time_interp_external module
! </DESCRIPTION>
!
subroutine time_interp_external_init()
integer :: ioun, io_status, logunit, ierr
namelist /time_interp_external_nml/ num_io_buffers, debug_this_module, &
max_fields, max_files
! open and read namelist
if(module_initialized) return
logunit = stdlog()
outunit = stdout()
call write_version_number("TIME_INTERP_EXTERNAL_MOD", version)
#ifdef INTERNAL_FILE_NML
read (input_nml_file, time_interp_external_nml, iostat=io_status)
ierr = check_nml_error(io_status, 'time_interp_external_nml')
#else
ioun = open_namelist_file ()
ierr=1; do while (ierr /= 0)
read (ioun, nml=time_interp_external_nml, iostat=io_status, end=10)
ierr = check_nml_error(io_status, 'time_interp_external_nml')
enddo
10 call close_file (ioun)
#endif
write(logunit,time_interp_external_nml)
call realloc_fields(max_fields)
call realloc_files(max_files)
module_initialized = .true.
call time_interp_init()
return
end subroutine time_interp_external_init
! </SUBROUTINE> NAME="time_interp_external_init"
!<FUNCTION NAME="init_external_field" TYPE="integer">
!
!<DESCRIPTION>
! initialize an external field. Buffer "num_io_buffers" (default=2) in memory to reduce memory allocations.
! distributed reads are supported using the optional "domain" flag.
! Units conversion via the optional "desired_units" flag using udunits_mod.
!
! Return integer id of field for future calls to time_interp_external.
!
! </DESCRIPTION>
!
!<IN NAME="file" TYPE="character(len=*)">
! filename
!</IN>
!<IN NAME="fieldname" TYPE="character(len=*)">
! fieldname (in file)
!</IN>
!<IN NAME="format" TYPE="integer">
! mpp_io flag for format of file (optional). Currently only "MPP_NETCDF" supported
!</IN>
!<IN NAME="threading" TYPE="integer">
! mpp_io flag for threading (optional). "MPP_SINGLE" means root pe reads global field and distributes to other PEs
! "MPP_MULTI" means all PEs read data
!</IN>
!<IN NAME="domain" TYPE="mpp_domains_mod:domain2d">
! domain flag (optional)
!</IN>
!<IN NAME="desired_units" TYPE="character(len=*)">
! Target units for data (optional), e.g. convert from deg_K to deg_C.
! Failure to convert using udunits will result in failure of this module.
!</IN>
!<IN NAME="verbose" TYPE="logical">
! verbose flag for debugging (optional).
!</IN>
!<INOUT NAME="axis_centers" TYPE="axistype" DIM="(4)">
! MPP_IO axistype array for grid centers ordered X-Y-Z-T (optional).
!</INOUT>
!<INOUT NAME="axis_sizes" TYPE="integer" DIM="(4)">
! array of axis lengths ordered X-Y-Z-T (optional).
!</INOUT>
function init_external_field(file,fieldname,format,threading,domain,desired_units,&
verbose,axis_centers,axis_sizes,override,correct_leap_year_inconsistency,&
permit_calendar_conversion,use_comp_domain,ierr, nwindows, ignore_axis_atts )
character(len=*), intent(in) :: file,fieldname
integer, intent(in), optional :: format, threading
logical, intent(in), optional :: verbose
character(len=*), intent(in), optional :: desired_units
type(domain2d), intent(in), optional :: domain
type(axistype), intent(inout), optional :: axis_centers(4)
integer, intent(inout), optional :: axis_sizes(4)
logical, intent(in), optional :: override, correct_leap_year_inconsistency,&
permit_calendar_conversion,use_comp_domain
integer, intent(out), optional :: ierr
integer, intent(in), optional :: nwindows
logical, optional :: ignore_axis_atts
real :: missing
integer :: init_external_field
type(fieldtype), dimension(:), allocatable :: flds
type(axistype), dimension(:), allocatable :: axes, fld_axes
type(axistype) :: time_axis
type(atttype), allocatable, dimension(:) :: global_atts
real(DOUBLE_KIND) :: slope, intercept
integer :: form, thread, fset, unit,ndim,nvar,natt,ntime,i,j
integer :: iscomp,iecomp,jscomp,jecomp,isglobal,ieglobal,jsglobal,jeglobal
integer :: isdata,iedata,jsdata,jedata, dxsize, dysize,dxsize_max,dysize_max
logical :: verb, transpose_xy,use_comp_domain1
real, dimension(:), allocatable :: tstamp, tstart, tend, tavg
character(len=1) :: cart
character(len=1), dimension(4) :: cart_dir
character(len=128) :: units, fld_units
character(len=128) :: name, msg, calendar_type, timebeg, timeend
integer :: siz(4), siz_in(4), gxsize, gysize,gxsize_max, gysize_max
type(time_type) :: tdiff
integer :: yr, mon, day, hr, minu, sec
integer :: len, nfile, nfields_orig, nbuf, nx,ny
integer :: numwindows
logical :: ignore_axatts
if (.not. module_initialized) call mpp_error(FATAL,'Must call time_interp_external_init first')
if(present(ierr)) ierr = SUCCESS
ignore_axatts=.false.
cart_dir(1)='X';cart_dir(2)='Y';cart_dir(3)='Z';cart_dir(4)='T'
if(present(ignore_axis_atts)) ignore_axatts = ignore_axis_atts
use_comp_domain1 = .false.
if(PRESENT(use_comp_domain)) use_comp_domain1 = use_comp_domain
form=MPP_NETCDF
if (PRESENT(format)) form = format
thread = MPP_MULTI
if (PRESENT(threading)) thread = threading
fset = MPP_SINGLE
verb=.false.
if (PRESENT(verbose)) verb=verbose
if (debug_this_module) verb = .true.
numwindows = 1
if(present(nwindows)) numwindows = nwindows
units = 'same'
if (PRESENT(desired_units)) then
units = desired_units
call mpp_error(FATAL,'==> Unit conversion via time_interp_external &
&has been temporarily deprecated. Previous versions of&
&this module used udunits_mod to perform unit conversion.&
& Udunits_mod is in the process of being replaced since &
&there were portability issues associated with this code.&
& Please remove the desired_units argument from calls to &
&this routine.')
endif
nfile = 0
do i=1,num_files
if(trim(opened_files(i)%filename) == trim(file)) then
nfile = i
exit ! file is already opened
endif
enddo
if(nfile == 0) then
call mpp_open(unit,trim(file),MPP_RDONLY,form,threading=thread,&
fileset=fset)
num_files = num_files + 1
if(num_files > max_files) then ! not enough space in the file table, reallocate it
!--- z1l: For the case of multiple thread, realoc_files will cause memory leak.
!--- If multiple threads are working on file A. One of the thread finished first and
!--- begin to work on file B, the realloc_files will cause problem for
!--- other threads are working on the file A.
! call realloc_files(2*size(opened_files))
call mpp_error(FATAL, "time_interp_external: num_files is greater than max_files, "// &
"increase time_interp_external_nml max_files")
endif
opened_files(num_files)%filename = trim(file)
opened_files(num_files)%unit = unit
else
unit = opened_files(nfile)%unit
endif
call mpp_get_info(unit,ndim,nvar,natt,ntime)
if (ntime < 1) then
write(msg,'(a15,a,a58)') 'external field ',trim(fieldname),&
' does not have an associated record dimension (REQUIRED) '
call mpp_error(FATAL,trim(msg))
endif
allocate(global_atts(natt))
call mpp_get_atts(unit, global_atts)
allocate(axes(ndim))
call mpp_get_axes(unit, axes, time_axis)
allocate(flds(nvar))
call mpp_get_fields(unit,flds)
allocate(tstamp(ntime),tstart(ntime),tend(ntime),tavg(ntime))
call mpp_get_times(unit,tstamp)
transpose_xy = .false.
isdata=1; iedata=1; jsdata=1; jedata=1
gxsize=1; gysize=1
siz_in = 1
if (PRESENT(domain)) then
call mpp_get_compute_domain(domain,iscomp,iecomp,jscomp,jecomp)
nx = iecomp-iscomp+1; ny = jecomp-jscomp+1
call mpp_get_data_domain(domain,isdata,iedata,jsdata,jedata,dxsize,dxsize_max,dysize,dysize_max)
call mpp_get_global_domain(domain,isglobal,ieglobal,jsglobal,jeglobal,gxsize,gxsize_max,gysize,gysize_max)
elseif(use_comp_domain1) then
call mpp_error(FATAL,"init_external_field:"//&
" use_comp_domain=true but domain is not present")
endif
init_external_field = -1
nfields_orig = num_fields
do i=1,nvar
call mpp_get_atts(flds(i),name=name,units=fld_units,ndim=ndim,siz=siz_in)
call mpp_get_tavg_info(unit,flds(i),flds,tstamp,tstart,tend,tavg)
call mpp_get_atts(flds(i),missing=missing)
! why does it convert case of the field name?
if (trim(lowercase(name)) /= trim(lowercase(fieldname))) cycle
if (verb) write(outunit,*) 'found field ',trim(fieldname), ' in file !!'
num_fields = num_fields + 1
if(num_fields > max_fields) then
!--- z1l: For the case of multiple thread, realoc_fields will cause memory leak.
!--- If multiple threads are working on field A. One of the thread finished first and
!--- begin to work on field B, the realloc_files will cause problem for
!--- other threads are working on the field A.
!call realloc_fields(size(field)*2)
call mpp_error(FATAL, "time_interp_external: num_fields is greater than max_fields, "// &
"increase time_interp_external_nml max_fields")
endif
init_external_field = num_fields
field(num_fields)%unit = unit
field(num_fields)%name = trim(name)
field(num_fields)%units = trim(fld_units)
field(num_fields)%field = flds(i)
field(num_fields)%isc = 1
field(num_fields)%iec = 1
field(num_fields)%jsc = 1
field(num_fields)%jec = 1
field(num_fields)%region_type = NO_REGION
field(num_fields)%is_region = 0
field(num_fields)%ie_region = -1
field(num_fields)%js_region = 0
field(num_fields)%je_region = -1
if (PRESENT(domain)) then
field(num_fields)%domain_present = .true.
field(num_fields)%domain = domain
field(num_fields)%isc=iscomp;field(num_fields)%iec = iecomp
field(num_fields)%jsc=jscomp;field(num_fields)%jec = jecomp
else
field(num_fields)%domain_present = .false.
endif
call mpp_get_atts(flds(i),valid=field(num_fields)%valid )
allocate(fld_axes(ndim))
call mpp_get_atts(flds(i),axes=fld_axes)
if (ndim > 4) call mpp_error(FATAL, &
'invalid array rank <=4d fields supported')
field(num_fields)%siz = 1
field(num_fields)%ndim = ndim
field(num_fields)%tdim = 4
field(num_fields)%missing = missing
do j=1,field(num_fields)%ndim
cart = 'N'
call get_axis_cart(fld_axes(j), cart)
call mpp_get_atts(fld_axes(j),len=len)
if (cart == 'N' .and. .not. ignore_axatts) then
write(msg,'(a,"/",a)') trim(file),trim(fieldname)
call mpp_error(FATAL,'file/field '//trim(msg)// &
' couldnt recognize axis atts in time_interp_external')
else if (cart == 'N' .and. ignore_axatts) then
cart = cart_dir(j)
endif
select case (cart)
case ('X')
if (j.eq.2) transpose_xy = .true.
if (.not.PRESENT(domain) .and. .not.PRESENT(override)) then
isdata=1;iedata=len
iscomp=1;iecomp=len
gxsize = len
dxsize = len
field(num_fields)%isc=iscomp;field(num_fields)%iec=iecomp
elseif (PRESENT(override)) then
gxsize = len
if (PRESENT(axis_sizes)) axis_sizes(1) = len
endif
field(num_fields)%axes(1) = fld_axes(j)
if(use_comp_domain1) then
field(num_fields)%siz(1) = nx
else
field(num_fields)%siz(1) = dxsize
endif
if (len /= gxsize) then
write(msg,'(a,"/",a)') trim(file),trim(fieldname)
call mpp_error(FATAL,'time_interp_ext, file/field '//trim(msg)//' x dim doesnt match model')
endif
case ('Y')
field(num_fields)%axes(2) = fld_axes(j)
if (.not.PRESENT(domain) .and. .not.PRESENT(override)) then
jsdata=1;jedata=len
jscomp=1;jecomp=len
gysize = len
dysize = len
field(num_fields)%jsc=jscomp;field(num_fields)%jec=jecomp
elseif (PRESENT(override)) then
gysize = len
if (PRESENT(axis_sizes)) axis_sizes(2) = len
endif
if(use_comp_domain1) then
field(num_fields)%siz(2) = ny
else
field(num_fields)%siz(2) = dysize
endif
if (len /= gysize) then
write(msg,'(a,"/",a)') trim(file),trim(fieldname)
call mpp_error(FATAL,'time_interp_ext, file/field '//trim(msg)//' y dim doesnt match model')
endif
case ('Z')
field(num_fields)%axes(3) = fld_axes(j)
field(num_fields)%siz(3) = siz_in(3)
case ('T')
field(num_fields)%axes(4) = fld_axes(j)
field(num_fields)%siz(4) = ntime
field(num_fields)%tdim = j
end select
enddo
siz = field(num_fields)%siz
if (PRESENT(axis_centers)) then
axis_centers = field(num_fields)%axes
endif
if (PRESENT(axis_sizes) .and. .not.PRESENT(override)) then
axis_sizes = field(num_fields)%siz
endif
deallocate(fld_axes)
if (verb) write(outunit,'(a,4i6)') 'field x,y,z,t local size= ',siz
if (verb) write(outunit,*) 'field contains data in units = ',trim(field(num_fields)%units)
if (transpose_xy) call mpp_error(FATAL,'axis ordering not supported')
if (num_io_buffers .le. 1) call mpp_error(FATAL,'time_interp_ext:num_io_buffers should be at least 2')
nbuf = min(num_io_buffers,siz(4))
field(num_fields)%numwindows = numwindows
allocate(field(num_fields)%need_compute(nbuf, numwindows))
field(num_fields)%need_compute = .true.
allocate(field(num_fields)%data(isdata:iedata,jsdata:jedata,siz(3),nbuf),&
field(num_fields)%mask(isdata:iedata,jsdata:jedata,siz(3),nbuf) )
field(num_fields)%mask = .false.
field(num_fields)%data = 0.0
slope=1.0;intercept=0.0
! if (units /= 'same') call convert_units(trim(field(num_fields)%units),trim(units),slope,intercept)
! if (verb.and.units /= 'same') then
! write(outunit,*) 'attempting to convert data to units = ',trim(units)
! write(outunit,'(a,f8.3,a,f8.3)') 'factor = ',slope,' offset= ',intercept
! endif
field(num_fields)%slope = slope
field(num_fields)%intercept = intercept
allocate(field(num_fields)%ibuf(nbuf))
field(num_fields)%ibuf = -1
field(num_fields)%nbuf = 0 ! initialize buffer number so that first reading fills data(:,:,:,1)
if(PRESENT(override)) then
field(num_fields)%is_src = 1
field(num_fields)%ie_src = gxsize
field(num_fields)%js_src = 1
field(num_fields)%je_src = gysize
allocate(field(num_fields)%src_data(gxsize,gysize,siz(3),nbuf))
else
field(num_fields)%is_src = isdata
field(num_fields)%ie_src = iedata
field(num_fields)%js_src = jsdata
field(num_fields)%je_src = jedata
allocate(field(num_fields)%src_data(isdata:iedata,jsdata:jedata,siz(3),nbuf))
endif
allocate(field(num_fields)%time(ntime))
allocate(field(num_fields)%period(ntime))
allocate(field(num_fields)%start_time(ntime))
allocate(field(num_fields)%end_time(ntime))
call mpp_get_atts(time_axis,units=units,calendar=calendar_type)
do j=1,ntime
field(num_fields)%time(j) = get_cal_time(tstamp(j),trim(units),trim(calendar_type),permit_calendar_conversion)
field(num_fields)%start_time(j) = get_cal_time(tstart(j),trim(units),trim(calendar_type),permit_calendar_conversion)
field(num_fields)%end_time(j) = get_cal_time( tend(j),trim(units),trim(calendar_type),permit_calendar_conversion)
enddo
if (field(num_fields)%modulo_time) then
call set_time_modulo(field(num_fields)%Time)
call set_time_modulo(field(num_fields)%start_time)
call set_time_modulo(field(num_fields)%end_time)
endif
if(present(correct_leap_year_inconsistency)) then
field(num_fields)%correct_leap_year_inconsistency = correct_leap_year_inconsistency
else
field(num_fields)%correct_leap_year_inconsistency = .false.
endif
if(get_axis_modulo_times(time_axis, timebeg, timeend)) then
if(get_calendar_type() == NO_CALENDAR) then
field(num_fields)%modulo_time_beg = set_time(timebeg)
field(num_fields)%modulo_time_end = set_time(timeend)
else
field(num_fields)%modulo_time_beg = set_date(timebeg)
field(num_fields)%modulo_time_end = set_date(timeend)
endif
field(num_fields)%have_modulo_times = .true.
else
field(num_fields)%have_modulo_times = .false.
endif
if(ntime == 1) then
call mpp_error(NOTE, 'time_interp_external_mod: file '//trim(file)//' has only one time level')
else
do j= 1, ntime
field(num_fields)%period(j) = field(num_fields)%end_time(j)-field(num_fields)%start_time(j)
if (field(num_fields)%period(j) > set_time(0,0)) then
call get_time(field(num_fields)%period(j), sec, day)
sec = sec/2+mod(day,2)*43200
day = day/2
field(num_fields)%time(j) = field(num_fields)%start_time(j)+&
set_time(sec,day)
else
if (j > 1 .and. j < ntime) then
tdiff = field(num_fields)%time(j+1) - field(num_fields)%time(j-1)
call get_time(tdiff, sec, day)
sec = sec/2+mod(day,2)*43200
day = day/2
field(num_fields)%period(j) = set_time(sec,day)
sec = sec/2+mod(day,2)*43200
day = day/2
field(num_fields)%start_time(j) = field(num_fields)%time(j) - set_time(sec,day)
field(num_fields)%end_time(j) = field(num_fields)%time(j) + set_time(sec,day)
elseif ( j == 1) then
tdiff = field(num_fields)%time(2) - field(num_fields)%time(1)
call get_time(tdiff, sec, day)
field(num_fields)%period(j) = set_time(sec,day)
sec = sec/2+mod(day,2)*43200
day = day/2
field(num_fields)%start_time(j) = field(num_fields)%time(j) - set_time(sec,day)
field(num_fields)%end_time(j) = field(num_fields)%time(j) + set_time(sec,day)
else
tdiff = field(num_fields)%time(ntime) - field(num_fields)%time(ntime-1)
call get_time(tdiff, sec, day)
field(num_fields)%period(j) = set_time(sec,day)
sec = sec/2+mod(day,2)*43200
day = day/2
field(num_fields)%start_time(j) = field(num_fields)%time(j) - set_time(sec,day)
field(num_fields)%end_time(j) = field(num_fields)%time(j) + set_time(sec,day)
endif
endif
enddo
endif
do j=1,ntime-1
if (field(num_fields)%time(j) >= field(num_fields)%time(j+1)) then
write(msg,'(A,i20)') "times not monotonically increasing. Filename: " &
//TRIM(file)//" field: "//TRIM(fieldname)//" timeslice: ", j
call mpp_error(FATAL, TRIM(msg))
endif
enddo
field(num_fields)%modulo_time = get_axis_modulo(time_axis)
if (verb) then
if (field(num_fields)%modulo_time) write(outunit,*) 'data are being treated as modulo in time'
do j= 1, ntime
write(outunit,*) 'time index, ', j
call get_date(field(num_fields)%start_time(j),yr,mon,day,hr,minu,sec)
write(outunit,'(a,i4,a,i2,a,i2,1x,i2,a,i2,a,i2)') &
'start time: yyyy/mm/dd hh:mm:ss= ',yr,'/',mon,'/',day,hr,':',minu,':',sec
call get_date(field(num_fields)%time(j),yr,mon,day,hr,minu,sec)
write(outunit,'(a,i4,a,i2,a,i2,1x,i2,a,i2,a,i2)') &
'mid time: yyyy/mm/dd hh:mm:ss= ',yr,'/',mon,'/',day,hr,':',minu,':',sec
call get_date(field(num_fields)%end_time(j),yr,mon,day,hr,minu,sec)
write(outunit,'(a,i4,a,i2,a,i2,1x,i2,a,i2,a,i2)') &
'end time: yyyy/mm/dd hh:mm:ss= ',yr,'/',mon,'/',day,hr,':',minu,':',sec
enddo
end if
enddo
if (num_fields == nfields_orig) then
if (present(ierr)) then
ierr = ERR_FIELD_NOT_FOUND
else
call mpp_error(FATAL,'external field "'//trim(fieldname)//'" not found in file "'//trim(file)//'"')
endif
endif
deallocate(global_atts)
deallocate(axes)
deallocate(flds)
deallocate(tstamp, tstart, tend, tavg)
return
end function init_external_field
!</FUNCTION> NAME="init_external_field"
subroutine time_interp_external_2d(index, time, data_in, interp, verbose,horz_interp, mask_out, &
is_in, ie_in, js_in, je_in, window_id)
integer, intent(in) :: index
type(time_type), intent(in) :: time
real, dimension(:,:), intent(inout) :: data_in
integer, intent(in), optional :: interp
logical, intent(in), optional :: verbose
type(horiz_interp_type),intent(in), optional :: horz_interp
logical, dimension(:,:), intent(out), optional :: mask_out ! set to true where output data is valid
integer, intent(in), optional :: is_in, ie_in, js_in, je_in
integer, intent(in), optional :: window_id
real , dimension(size(data_in,1), size(data_in,2), 1) :: data_out
logical, dimension(size(data_in,1), size(data_in,2), 1) :: mask3d
data_out(:,:,1) = data_in(:,:) ! fill initial values for the portions of array that are not touched by 3d routine
call time_interp_external_3d(index, time, data_out, interp, verbose, horz_interp, mask3d, &
is_in=is_in,ie_in=ie_in,js_in=js_in,je_in=je_in,window_id=window_id)
data_in(:,:) = data_out(:,:,1)
if (PRESENT(mask_out)) mask_out(:,:) = mask3d(:,:,1)
return
end subroutine time_interp_external_2d
!<SUBROUTINE NAME="time_interp_external" >
!
!<DESCRIPTION>
! Provide data from external file interpolated to current model time.
! Data may be local to current processor or global, depending on
! "init_external_field" flags.
!</DESCRIPTION>
!
!<IN NAME="index" TYPE="integer">
! index of external field from previous call to init_external_field
!</IN>
!<IN NAME="time" TYPE="time_manager_mod:time_type">
! target time for data
!</IN>
!<INOUT NAME="data" TYPE="real" DIM="(:,:),(:,:,:)">
! global or local data array
!</INOUT>
!<IN NAME="interp" TYPE="integer">
! time_interp_external defined interpolation method (optional). Currently this module only supports
! LINEAR_TIME_INTERP.
!</IN>
!<IN NAME="verbose" TYPE="logical">
! verbose flag for debugging (optional).
!</IN>
subroutine time_interp_external_3d(index, time, data, interp,verbose,horz_interp, mask_out, is_in, ie_in, js_in, je_in, window_id)
integer, intent(in) :: index
type(time_type), intent(in) :: time
real, dimension(:,:,:), intent(inout) :: data
integer, intent(in), optional :: interp
logical, intent(in), optional :: verbose
type(horiz_interp_type), intent(in), optional :: horz_interp
logical, dimension(:,:,:), intent(out), optional :: mask_out ! set to true where output data is valid
integer, intent(in), optional :: is_in, ie_in, js_in, je_in
integer, intent(in), optional :: window_id
integer :: nx, ny, nz, interp_method, t1, t2
integer :: i1, i2, isc, iec, jsc, jec, mod_time
integer :: yy, mm, dd, hh, min, ss
character(len=256) :: err_msg, filename
integer :: isw, iew, jsw, jew, nxw, nyw
! these are boundaries of the updated portion of the "data" argument
! they are calculated using sizes of the "data" and isc,iec,jsc,jsc
! fileds from respective input field, to center the updated portion
! in the output array
real :: w1,w2
logical :: verb
character(len=16) :: message1, message2
nx = size(data,1)
ny = size(data,2)
nz = size(data,3)
interp_method = LINEAR_TIME_INTERP
if (PRESENT(interp)) interp_method = interp
verb=.false.
if (PRESENT(verbose)) verb=verbose
if (debug_this_module) verb = .true.
if (index < 1.or.index > num_fields) &
call mpp_error(FATAL,'invalid index in call to time_interp_ext -- field was not initialized or failed to initialize')
isc=field(index)%isc;iec=field(index)%iec
jsc=field(index)%jsc;jec=field(index)%jec
if( field(index)%numwindows == 1 ) then
nxw = iec-isc+1
nyw = jec-jsc+1
else
if( .not. present(is_in) .or. .not. present(ie_in) .or. .not. present(js_in) .or. .not. present(je_in) ) then
call mpp_error(FATAL, 'time_interp_external: is_in, ie_in, js_in and je_in must be present ' // &
'when numwindows > 1, field='//trim(field(index)%name))
endif
nxw = ie_in - is_in + 1
nyw = je_in - js_in + 1
isc = isc + is_in - 1
iec = isc + ie_in - is_in
jsc = jsc + js_in - 1
jec = jsc + je_in - js_in
endif
isw = (nx-nxw)/2+1; iew = isw+nxw-1
jsw = (ny-nyw)/2+1; jew = jsw+nyw-1
if (nx < nxw .or. ny < nyw .or. nz < field(index)%siz(3)) then
write(message1,'(i6,2i5)') nx,ny,nz
call mpp_error(FATAL,'field '//trim(field(index)%name)//' Array size mismatch in time_interp_external.'// &
' Array "data" is too small. shape(data)='//message1)
endif
if(PRESENT(mask_out)) then
if (size(mask_out,1) /= nx .or. size(mask_out,2) /= ny .or. size(mask_out,3) /= nz) then
write(message1,'(i6,2i5)') nx,ny,nz
write(message2,'(i6,2i5)') size(mask_out,1),size(mask_out,2),size(mask_out,3)
call mpp_error(FATAL,'field '//trim(field(index)%name)//' array size mismatch in time_interp_external.'// &
' Shape of array "mask_out" does not match that of array "data".'// &
' shape(data)='//message1//' shape(mask_out)='//message2)
endif
endif
if (field(index)%siz(4) == 1) then
! only one record in the file => time-independent field
call load_record(field(index),1,horz_interp, is_in, ie_in ,js_in, je_in,window_id)
i1 = find_buf_index(1,field(index)%ibuf)
if( field(index)%region_type == NO_REGION ) then
where(field(index)%mask(isc:iec,jsc:jec,:,i1))
data(isw:iew,jsw:jew,:) = field(index)%data(isc:iec,jsc:jec,:,i1)
elsewhere
! data(isw:iew,jsw:jew,:) = time_interp_missing !field(index)%missing? Balaji
data(isw:iew,jsw:jew,:) = field(index)%missing
end where
else
where(field(index)%mask(isc:iec,jsc:jec,:,i1))
data(isw:iew,jsw:jew,:) = field(index)%data(isc:iec,jsc:jec,:,i1)
end where
endif
if(PRESENT(mask_out)) &
mask_out(isw:iew,jsw:jew,:) = field(index)%mask(isc:iec,jsc:jec,:,i1)
else
if(field(index)%have_modulo_times) then
call time_interp(time,field(index)%modulo_time_beg, field(index)%modulo_time_end, field(index)%time(:), &
w2, t1, t2, field(index)%correct_leap_year_inconsistency, err_msg=err_msg)
if(err_msg .NE. '') then
filename = mpp_get_file_name(field(index)%unit)
call mpp_error(FATAL,"time_interp_external 1: "//trim(err_msg)//&
",file="//trim(filename)//",field="//trim(field(index)%name) )
endif
else
if(field(index)%modulo_time) then
mod_time=1
else
mod_time=0
endif
call time_interp(time,field(index)%time(:),w2,t1,t2,modtime=mod_time, err_msg=err_msg)
if(err_msg .NE. '') then
filename = mpp_get_file_name(field(index)%unit)
call mpp_error(FATAL,"time_interp_external 2: "//trim(err_msg)//&
",file="//trim(filename)//",field="//trim(field(index)%name) )
endif
endif
w1 = 1.0-w2
if (verb) then
call get_date(time,yy,mm,dd,hh,min,ss)
write(outunit,'(a,i4,a,i2,a,i2,1x,i2,a,i2,a,i2)') &
'target time yyyy/mm/dd hh:mm:ss= ',yy,'/',mm,'/',dd,hh,':',min,':',ss
write(outunit,*) 't1, t2, w1, w2= ', t1, t2, w1, w2
endif
call load_record(field(index),t1,horz_interp, is_in, ie_in ,js_in, je_in, window_id)
call load_record(field(index),t2,horz_interp, is_in, ie_in ,js_in, je_in, window_id)
i1 = find_buf_index(t1,field(index)%ibuf)
i2 = find_buf_index(t2,field(index)%ibuf)
if(i1<0.or.i2<0) &
call mpp_error(FATAL,'time_interp_external : records were not loaded correctly in memory')
if (verb) then
write(outunit,*) 'ibuf= ',field(index)%ibuf
write(outunit,*) 'i1,i2= ',i1, i2
endif
if( field(index)%region_type == NO_REGION ) then
where(field(index)%mask(isc:iec,jsc:jec,:,i1).and.field(index)%mask(isc:iec,jsc:jec,:,i2))
data(isw:iew,jsw:jew,:) = field(index)%data(isc:iec,jsc:jec,:,i1)*w1 + &
field(index)%data(isc:iec,jsc:jec,:,i2)*w2
elsewhere
! data(isw:iew,jsw:jew,:) = time_interp_missing !field(index)%missing? Balaji
data(isw:iew,jsw:jew,:) = field(index)%missing
end where
else
where(field(index)%mask(isc:iec,jsc:jec,:,i1).and.field(index)%mask(isc:iec,jsc:jec,:,i2))
data(isw:iew,jsw:jew,:) = field(index)%data(isc:iec,jsc:jec,:,i1)*w1 + &
field(index)%data(isc:iec,jsc:jec,:,i2)*w2
end where
endif
if(PRESENT(mask_out)) &
mask_out(isw:iew,jsw:jew,:) = &
field(index)%mask(isc:iec,jsc:jec,:,i1).and.&
field(index)%mask(isc:iec,jsc:jec,:,i2)
endif
end subroutine time_interp_external_3d
!</SUBROUTINE> NAME="time_interp_external"
subroutine time_interp_external_0d(index, time, data, verbose)
integer, intent(in) :: index
type(time_type), intent(in) :: time
real, intent(inout) :: data
logical, intent(in), optional :: verbose
integer :: t1, t2
integer :: i1, i2, mod_time
integer :: yy, mm, dd, hh, min, ss
character(len=256) :: err_msg, filename
real :: w1,w2
logical :: verb
verb=.false.
if (PRESENT(verbose)) verb=verbose
if (debug_this_module) verb = .true.
if (index < 1.or.index > num_fields) &
call mpp_error(FATAL,'invalid index in call to time_interp_ext -- field was not initialized or failed to initialize')
if (field(index)%siz(4) == 1) then
! only one record in the file => time-independent field
call load_record_0d(field(index),1)
i1 = find_buf_index(1,field(index)%ibuf)
data = field(index)%data(1,1,1,i1)
else
if(field(index)%have_modulo_times) then
call time_interp(time,field(index)%modulo_time_beg, field(index)%modulo_time_end, field(index)%time(:), &
w2, t1, t2, field(index)%correct_leap_year_inconsistency, err_msg=err_msg)
if(err_msg .NE. '') then
filename = mpp_get_file_name(field(index)%unit)
call mpp_error(FATAL,"time_interp_external 3:"//trim(err_msg)//&
",file="//trim(filename)//",field="//trim(field(index)%name) )
endif
else
if(field(index)%modulo_time) then
mod_time=1
else
mod_time=0
endif
call time_interp(time,field(index)%time(:),w2,t1,t2,modtime=mod_time, err_msg=err_msg)
if(err_msg .NE. '') then
filename = mpp_get_file_name(field(index)%unit)
call mpp_error(FATAL,"time_interp_external 4:"//trim(err_msg)// &
",file="//trim(filename)//",field="//trim(field(index)%name) )
endif
endif
w1 = 1.0-w2
if (verb) then
call get_date(time,yy,mm,dd,hh,min,ss)
write(outunit,'(a,i4,a,i2,a,i2,1x,i2,a,i2,a,i2)') &
'target time yyyy/mm/dd hh:mm:ss= ',yy,'/',mm,'/',dd,hh,':',min,':',ss
write(outunit,*) 't1, t2, w1, w2= ', t1, t2, w1, w2
endif
call load_record_0d(field(index),t1)
call load_record_0d(field(index),t2)
i1 = find_buf_index(t1,field(index)%ibuf)
i2 = find_buf_index(t2,field(index)%ibuf)
if(i1<0.or.i2<0) &
call mpp_error(FATAL,'time_interp_external : records were not loaded correctly in memory')
data = field(index)%data(1,1,1,i1)*w1 + field(index)%data(1,1,1,i2)*w2
if (verb) then
write(outunit,*) 'ibuf= ',field(index)%ibuf
write(outunit,*) 'i1,i2= ',i1, i2
endif
endif
end subroutine time_interp_external_0d
subroutine set_time_modulo(Time)
type(time_type), intent(inout), dimension(:) :: Time
integer :: ntime, n
integer :: yr, mon, dy, hr, minu, sec
ntime = size(Time(:))
do n = 1, ntime
call get_date(Time(n), yr, mon, dy, hr, minu, sec)
yr = modulo_year
Time(n) = set_date(yr, mon, dy, hr, minu, sec)
enddo
end subroutine set_time_modulo
! ============================================================================
! load specified record from file
subroutine load_record(field, rec, interp, is_in, ie_in, js_in, je_in, window_id_in)
type(ext_fieldtype), intent(inout) :: field
integer , intent(in) :: rec ! record number
type(horiz_interp_type), intent(in), optional :: interp
integer, intent(in), optional :: is_in, ie_in, js_in, je_in
integer, intent(in), optional :: window_id_in
! ---- local vars
integer :: ib ! index in the array of input buffers
integer :: isw,iew,jsw,jew ! boundaries of the domain on each window
integer :: is_region, ie_region, js_region, je_region, i, j, n
integer :: start(4), nread(4)
logical :: need_compute
real :: mask_in(size(field%src_data,1),size(field%src_data,2),size(field%src_data,3))
real, allocatable :: mask_out(:,:,:)
integer :: window_id
window_id = 1
if( PRESENT(window_id_in) ) window_id = window_id_in
need_compute = .true.
!$OMP CRITICAL
ib = find_buf_index(rec,field%ibuf)
if(ib>0) then
!--- do nothing
need_compute = .false.
else
! calculate current buffer number in round-robin fasion
field%nbuf = field%nbuf + 1
if(field%nbuf > size(field%data,4).or.field%nbuf <= 0) field%nbuf = 1
ib = field%nbuf
field%ibuf(ib) = rec
field%need_compute(ib,:) = .true.
if (field%domain_present .and. .not.PRESENT(interp)) then
if (debug_this_module) write(outunit,*) 'reading record with domain for field ',trim(field%name)
call mpp_read(field%unit,field%field,field%domain,field%src_data(:,:,:,ib),rec)
else
if (debug_this_module) write(outunit,*) 'reading record without domain for field ',trim(field%name)
start = 1; nread = 1
start(1) = field%is_src; nread(1) = field%ie_src - field%is_src + 1
start(2) = field%js_src; nread(2) = field%je_src - field%js_src + 1