diff --git a/cicecore/cicedyn/analysis/ice_history_shared.F90 b/cicecore/cicedyn/analysis/ice_history_shared.F90 index f4e1f3ebf..3c31f23ca 100644 --- a/cicecore/cicedyn/analysis/ice_history_shared.F90 +++ b/cicecore/cicedyn/analysis/ice_history_shared.F90 @@ -132,6 +132,8 @@ module ice_history_shared time_end(max_nstrm), & time_bounds(2) + character (len=char_len), public :: hist_time_axis + real (kind=dbl_kind), allocatable, public :: & a2D (:,:,:,:) , & ! field accumulations/averages, 2D a3Dz(:,:,:,:,:) , & ! field accumulations/averages, 3D vertical diff --git a/cicecore/cicedyn/general/ice_init.F90 b/cicecore/cicedyn/general/ice_init.F90 index 1baaa95b3..2c8b1db3b 100644 --- a/cicecore/cicedyn/general/ice_init.F90 +++ b/cicecore/cicedyn/general/ice_init.F90 @@ -81,7 +81,7 @@ subroutine input_data runid, runtype, use_restart_time, restart_format, lcdf64 use ice_history_shared, only: hist_avg, history_dir, history_file, & incond_dir, incond_file, version_name, & - history_precision, history_format + history_precision, history_format, hist_time_axis use ice_flux, only: update_ocn_f, l_mpond_fresh use ice_flux, only: default_season use ice_flux_bgc, only: cpl_bgc @@ -185,6 +185,7 @@ subroutine input_data restart_ext, use_restart_time, restart_format, lcdf64, & pointer_file, dumpfreq, dumpfreq_n, dump_last, & diagfreq, diag_type, diag_file, history_format,& + hist_time_axis, & print_global, print_points, latpnt, lonpnt, & debug_forcing, histfreq, histfreq_n, hist_avg, & history_dir, history_file, history_precision, cpl_bgc, & @@ -324,6 +325,8 @@ subroutine input_data histfreq_base = 'zero' ! output frequency reference date hist_avg(:) = .true. ! if true, write time-averages (not snapshots) history_format = 'default' ! history file format + hist_time_axis = 'end' ! History file time axis averaging interval position + history_dir = './' ! write to executable dir for default history_file = 'iceh' ! history file name prefix history_precision = 4 ! precision of history files @@ -906,6 +909,7 @@ subroutine input_data call broadcast_scalar(history_file, master_task) call broadcast_scalar(history_precision, master_task) call broadcast_scalar(history_format, master_task) + call broadcast_scalar(hist_time_axis, master_task) call broadcast_scalar(write_ic, master_task) call broadcast_scalar(cpl_bgc, master_task) call broadcast_scalar(incond_dir, master_task) @@ -1570,6 +1574,11 @@ subroutine input_data abort_list = trim(abort_list)//":24" endif + if(trim(hist_time_axis) /= 'begin' .and. trim(hist_time_axis) /= 'middle' .and. trim(hist_time_axis) /= 'end') then + write (nu_diag,*) subname//' ERROR: hist_time_axis value not valid = '//trim(hist_time_axis) + abort_list = trim(abort_list)//":29" + endif + if(dumpfreq_base /= 'init' .and. dumpfreq_base /= 'zero') then write (nu_diag,*) subname//' ERROR: bad value for dumpfreq_base, allowed values: init, zero' abort_list = trim(abort_list)//":25" @@ -2316,6 +2325,7 @@ subroutine input_data write(nu_diag,1031) ' history_file = ', trim(history_file) write(nu_diag,1021) ' history_precision= ', history_precision write(nu_diag,1031) ' history_format = ', trim(history_format) + write(nu_diag,1031) ' hist_time_axis = ', trim(hist_time_axis) if (write_ic) then write(nu_diag,1039) ' Initial condition will be written in ', & trim(incond_dir) diff --git a/cicecore/cicedyn/infrastructure/io/io_netcdf/ice_history_write.F90 b/cicecore/cicedyn/infrastructure/io/io_netcdf/ice_history_write.F90 index 25178ed6e..bfbe31707 100644 --- a/cicecore/cicedyn/infrastructure/io/io_netcdf/ice_history_write.F90 +++ b/cicecore/cicedyn/infrastructure/io/io_netcdf/ice_history_write.F90 @@ -21,7 +21,7 @@ module ice_history_write - use ice_constants, only: c0, c360, spval, spval_dbl + use ice_constants, only: c0, c360, p5, spval, spval_dbl use ice_fileunits, only: nu_diag use ice_exit, only: abort_ice use icepack_intfc, only: icepack_warnings_flush, icepack_warnings_aborted @@ -137,8 +137,6 @@ subroutine ice_write_hist (ns) if (my_task == master_task) then - ltime2 = timesecs/secday - call construct_filename(ncfile(ns),'nc',ns) ! add local directory path name to ncfile @@ -718,6 +716,12 @@ subroutine ice_write_hist (ns) 'ERROR: global attribute time_period_freq') endif + if (hist_avg(ns)) then + status = nf90_put_att(ncid,nf90_global,'time_axis_position',trim(hist_time_axis)) + if (status /= nf90_noerr) call abort_ice(subname// & + 'ERROR: global attribute time axis position') + endif + title = 'CF-1.0' status = & nf90_put_att(ncid,nf90_global,'conventions',title) @@ -749,7 +753,16 @@ subroutine ice_write_hist (ns) !----------------------------------------------------------------- ! write time variable !----------------------------------------------------------------- - + + ltime2 = timesecs/secday ! hist_time_axis = 'end' (default) + + ! Some coupled models require the time axis "stamp" to be in the middle + ! or even beginning of averaging interval. + if (hist_avg(ns)) then + if (trim(hist_time_axis) == "begin" ) ltime2 = time_beg(ns) + if (trim(hist_time_axis) == "middle") ltime2 = p5*(time_beg(ns)+time_end(ns)) + endif + status = nf90_inq_varid(ncid,'time',varid) if (status /= nf90_noerr) call abort_ice(subname// & 'ERROR: getting time varid') diff --git a/cicecore/cicedyn/infrastructure/io/io_pio2/ice_history_write.F90 b/cicecore/cicedyn/infrastructure/io/io_pio2/ice_history_write.F90 index 35ec7bed2..877071a11 100644 --- a/cicecore/cicedyn/infrastructure/io/io_pio2/ice_history_write.F90 +++ b/cicecore/cicedyn/infrastructure/io/io_pio2/ice_history_write.F90 @@ -18,7 +18,7 @@ module ice_history_write use ice_kinds_mod - use ice_constants, only: c0, c360, spval, spval_dbl + use ice_constants, only: c0, c360, p5, spval, spval_dbl use ice_fileunits, only: nu_diag use ice_exit, only: abort_ice use icepack_intfc, only: icepack_warnings_flush, icepack_warnings_aborted @@ -185,8 +185,6 @@ subroutine ice_write_hist (ns) call ice_pio_initdecomp(ndim3=nzslyr, ndim4=ncat_hist, iodesc=iodesc4ds, precision=history_precision) call ice_pio_initdecomp(ndim3=nfsd_hist, ndim4=ncat_hist, iodesc=iodesc4df, precision=history_precision) - ltime2 = timesecs/secday - ! option of turning on double precision history files lprecision = pio_real if (history_precision == 8) lprecision = pio_double @@ -678,6 +676,9 @@ subroutine ice_write_hist (ns) status = pio_put_att(File,pio_global,'time_period_freq',trim(time_period_freq)) endif + if (hist_avg(ns)) & + status = pio_put_att(File,pio_global,'time_axis_position',trim(hist_time_axis)) + title = 'CF-1.0' status = & pio_put_att(File,pio_global,'conventions',trim(title)) @@ -706,6 +707,15 @@ subroutine ice_write_hist (ns) ! write time variable !----------------------------------------------------------------- + ltime2 = timesecs/secday ! hist_time_axis = 'end' (default) + + ! Some coupled models require the time axis "stamp" to be in the middle + ! or even beginning of averaging interval. + if (hist_avg(ns)) then + if (trim(hist_time_axis) == "begin" ) ltime2 = time_beg(ns) + if (trim(hist_time_axis) == "middle") ltime2 = p5*(time_beg(ns)+time_end(ns)) + endif + status = pio_inq_varid(File,'time',varid) status = pio_put_var(File,varid,(/1/),ltime2) diff --git a/configuration/scripts/ice_in b/configuration/scripts/ice_in index 8dc046da5..e0e317e40 100644 --- a/configuration/scripts/ice_in +++ b/configuration/scripts/ice_in @@ -53,6 +53,7 @@ history_file = 'iceh' history_precision = 4 history_format = 'default' + hist_time_axis = 'end' write_ic = .true. incond_dir = './history/' incond_file = 'iceh_ic' diff --git a/doc/source/cice_index.rst b/doc/source/cice_index.rst index 0c0ab6971..36c772eff 100644 --- a/doc/source/cice_index.rst +++ b/doc/source/cice_index.rst @@ -322,6 +322,7 @@ either Celsius or Kelvin units). Deprecated parameters are listed at the end. "history_file", "history output file prefix", "" "history_format", "history file format", "" "history_precision", "history output precision: 4 or 8 byte", "4" + "hist_time_axis", "history file time axis interval location: begin, middle, end", "end" "hm", "land/boundary mask, thickness (T-cell)", "" "hmix", "ocean mixed layer depth", "20. m" "hour", "hour of the year", "" diff --git a/doc/source/user_guide/ug_case_settings.rst b/doc/source/user_guide/ug_case_settings.rst index 2a7240c78..d5ec89df1 100644 --- a/doc/source/user_guide/ug_case_settings.rst +++ b/doc/source/user_guide/ug_case_settings.rst @@ -191,6 +191,7 @@ setup_nml "``history_format``", "``default``", "read/write history files in default format", "``default``" "", "``pio_pnetcdf``", "read/write restart files with pnetcdf in pio", "" "``history_precision``", "integer", "history file precision: 4 or 8 byte", "4" + "``hist_time_axis``","character","history file time axis interval location: begin, middle, end","end" "``ice_ic``", "``default``", "equal to internal", "``default``" "", "``internal``", "initial conditions set based on ice\_data\_type,conc,dist inputs", "" "", "``none``", "no ice", "" diff --git a/doc/source/user_guide/ug_implementation.rst b/doc/source/user_guide/ug_implementation.rst index acc75b3d8..f6327333c 100644 --- a/doc/source/user_guide/ug_implementation.rst +++ b/doc/source/user_guide/ug_implementation.rst @@ -1197,8 +1197,11 @@ with a given ``histfreq`` value, or if an element of ``histfreq_n`` is 0, then no file will be written at that frequency. The output period can be discerned from the filenames. All history streams will be either instantaneous or averaged as specified by the ``hist_avg`` namelist setting and the frequency -will be relative to a reference date specified by ``histfreq_base``. More -information about how the frequency is computed is found in :ref:`timemanager`. +will be relative to a reference date specified by ``histfreq_base``. Also, some +Earth Sytem Models require the history file time axis to be centered in the averaging +interval. The flag ``hist_time_axis`` will allow the user to chose ``begin``, ``middle``, +or ``end`` for the time stamp. More information about how the frequency is +computed is found in :ref:`timemanager`. For example, in the namelist: