Closed aradhakrishnanGFDL closed 5 years ago
The data request indicates that rlt in E1hrClimMon should be a function of (longitude, latitude, time3) where time3 is a climatological time-axis named "time" in the netcdf file. Also, cell_methods = "area: mean time: mean within days time: mean over days", which I think implies "time" is the only axis. Your single time axis should be:
double time(time) ; time:standard_name = "time" ; time:units = "days since 1850-01-01 00:00:00" ; time:axis = "T" ; time:long_name = "time" ; time:calendar = "noleap" ; time:climatology = "time_bnds" ;
Note that there should be no "bounds" attribute. The value of the bounds for each month should be defined consistent with the following example (from just a single month):
time_bnds="1997-4-1 0:00", "1997-4-30 1:00", "1997-4-1 1:00", "1997-4-30 2:00", ... "1997-4-1 23:00", "1997-5-1 0:00" ;
You will need to express these as "days since ...".
@aradhakrishnanGFDL Is it o.k. to close this issue?
Yes, I think so.
Hello,
At GFDL, we are preparing to publish fields in E1hrClimMon table and we are running into the following issue for which your advice is appreciated. (note: We do not use CMOR, but we have a CMOR analog that adheres to the standards. )
[testdir]/CMIP6/CMIP/NOAA-GFDL/GFDL-ESM4/historical/r1i1p1f1/E1hrClimMon/rlut/gr1/v20190607/rlut_E1hrClimMon_GFDL-ESM4_historical_r1i1p1f1_gr1_200501010000-201412010000-clim.nc
netcdf header
netcdf rlut_E1hrClimMon_GFDL-ESM4_historical_r1i1p1f1_gr1_200501010000-201412010000-clim { dimensions: bnds = 2 ; lat = 180 ; lon = 288 ; time = UNLIMITED ; // (120 currently) time_of_day_24 = 24 ; time_of_day_edges_24 = 25 ; variables: double bnds(bnds) ; bnds:long_name = "vertex number" ; double lat(lat) ; lat:long_name = "latitude" ; lat:units = "degrees_north" ; lat:axis = "Y" ; lat:bounds = "lat_bnds" ; lat:standard_name = "latitude" ; lat:cell_methods = "time: point" ; double lat_bnds(lat, bnds) ; lat_bnds:long_name = "latitude bounds" ; lat_bnds:units = "degrees_north" ; lat_bnds:axis = "Y" ; double lon(lon) ; lon:long_name = "longitude" ; lon:units = "degrees_east" ; lon:axis = "X" ; lon:bounds = "lon_bnds" ; lon:standard_name = "longitude" ; lon:cell_methods = "time: point" ; double lon_bnds(lon, bnds) ; lon_bnds:long_name = "longitude bounds" ; lon_bnds:units = "degrees_east" ; lon_bnds:axis = "X" ; float rlut(time, time_of_day_24, lat, lon) ; rlut:long_name = "TOA Outgoing Longwave Radiation" ; rlut:units = "W m-2" ; rlut:missing_value = 1.e+20f ; rlut:_FillValue = 1.e+20f ; rlut:cell_methods = "area: mean time: mean within days time: mean over days" ; rlut:cell_measures = "area: areacella" ; rlut:standard_name = "toa_outgoing_longwave_flux" ; rlut:interp_method = "conserve_order2" ; rlut:original_name = "rlut" ; double time(time) ; time:long_name = "time" ; time:units = "days since 1850-01-01 00:00:00" ; time:axis = "T" ; time:calendar_type = "noleap" ; time:calendar = "noleap" ; time:bounds = "time3_bnds" ; time:standard_name = "time" ; time:description = "Mean Diurnal Cycle" ; double time_bnds(time, bnds) ; time_bnds:long_name = "time axis boundaries" ; time_bnds:units = "days since 1850-01-01 00:00:00" ; time_bnds:missing_value = 1.e+20 ; time_bnds:_FillValue = 1.e+20 ; double time_of_day_24(time_of_day_24) ; time_of_day_24:long_name = "time of day" ; time_of_day_24:units = "hours since 1850-01-01 00:00:00" ; time_of_day_24:edges = "time_of_day_edges_24" ; double time_of_day_edges_24(time_of_day_edges_24) ; time_of_day_edges_24:long_name = "time of day edges" ; time_of_day_edges_24:units = "hours since 1850-01-01 00:00:00" ;
// global attributes: :external_variables = "areacella" ; :history = "File was processed by fremetar (GFDL analog of CMOR). TripleID: [exper_id_9y3pVZNo6k,realiz_id_pMwNqyCTLq,run_id_G25cT0smqu]" ; :table_id = "E1hrClimMon" ; :activity_id = "CMIP" ; :branch_method = "standard" ; :branch_time_in_child = 0. ; :branch_time_in_parent = 36500. ; :comment = "" ;
:contact = "gfdl.climate.model.info@noaa.gov" ;
:Conventions = "CF-1.7 CMIP-6.0 UGRID-1.0" ;
:creation_date = "2019-06-07T15:47:58Z" ;
:data_specs_version = "01.00.27" ;
:experiment = "all-forcing simulation of the recent past" ;
:experiment_id = "historical" ;
:forcing_index = 1 ;
:frequency = "1hrCM" ;
:further_info_url = "https://furtherinfo.es-doc.org/CMIP6.NOAA-GFDL.GFDL-ESM4.historical.none.r1i1p1f1" ;
:grid = "atmos data regridded from Cubed-sphere (c96) to 180,288; interpolation method: conserve_order2" ;
:grid_label = "gr1" ;
:initialization_index = 1 ;
:institution = "National Oceanic and Atmospheric Administration, Geophysical Fluid Dynamics Laboratory, Princeton, NJ 08540, USA" ;
:institution_id = "NOAA-GFDL" ;
:license = "CMIP6 model data produced by NOAA-GFDL is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License (https://creativecommons.org/licenses/). Consult https://pcmdi.llnl.gov/CMIP6/TermsOfUse for terms of use governing CMIP6 output, including citation requirements and proper acknowledgment. Further information about this data, including some limitations, can be found via the further_info_url (recorded as a global attribute in this file). The data producers and data providers make no warranty, either express or implied, including, but not limited to, warranties of merchantability and fitness for a particular purpose. All liabilities arising from the supply of the information (including any liability arising in negligence) are excluded to the fullest extent permitted by law." ;
:mip_era = "CMIP6" ;
:nominal_resolution = "100 km" ;
:parent_activity_id = "CMIP" ;
:parent_experiment_id = "piControl" ;
:parent_mip_era = "CMIP6" ;
:parent_source_id = "GFDL-ESM4" ;
:parent_time_units = "days since 0001-1-1" ;
:parent_variant_label = "r1i1p1f1" ;
:physics_index = 1 ;
:product = "model-output" ;
:realization_index = 1 ;
:realm = "atmos" ;
:source = "GFDL-ESM4 (2018):\n",
"atmos: GFDL-AM4.1 (Cubed-sphere (c96) - 1 degree nominal horizontal resolution; 360 x 180 longitude/latitude; 49 levels; top level 1 Pa)\n",
"ocean: GFDL-OM4p5 (GFDL-MOM6, tripolar - nominal 0.5 deg; 720 x 576 longitude/latitude; 75 levels; top grid cell 0-2 m)\n",
"seaIce: GFDL-SIM4p5 (GFDL-SIS2.0, tripolar - nominal 0.5 deg; 720 x 576 longitude/latitude; 5 layers; 5 thickness categories)\n",
"land: GFDL-LM4.1\n",
"aerosol: interactive\n",
"atmosChem: GFDL-ATMCHEM4.1 (full atmospheric chemistry)\n",
"ocnBgchem: GFDL-COBALTv2\n",
"landIce: GFDL-LM4.1\n",
"(GFDL ID: 2019_0092)" ;
:source_id = "GFDL-ESM4" ;
:source_type = "AOGCM AER CHEM BGC" ;
:sub_experiment = "none" ;
:sub_experiment_id = "none" ;
:title = "NOAA GFDL GFDL-ESM4 model output prepared for CMIP6 all-forcing simulation of the recent past" ;
:tracking_id = "hdl:21.14100/f28d9f2e-7f83-499d-9131-7e46829b072b" ;
:variable_id = "rlut" ;
:variant_info = "N/A" ;
:references = "see further_info_url attribute" ;
:variant_label = "r1i1p1f1" ;
}
time = 56590.5, 56620,..60179, 60209.5 ; time_of_day_24 = 0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5, 10.5, 11.5, 12.5, 13.5, 14.5, 15.5, 16.5, 17.5, 18.5, 19.5, 20.5, 21.5, 22.5, 23.
What might we be missing? When I open the dataset in ferret, it does show the time period as specified in the file name.
Thanks,