Add NAME cdl files #13

mo-benjaminevans · 2025-12-15T14:35:29Z

To aid visibility and discussion on native NAME NetCDF output, I am going to add the .cdl files to this repository.

mo-marqh

detail comment on quantity definition, naming, units, etc. for scientific data variables

mo-marqh · 2026-01-15T09:11:52Z

example-metadata/NAME/FMD_Fields_grid1_C1_T1_202307030000.cdl

+		TCID50_AIR_CONCENTRATION:long_name = "TCID50_AIR_CONCENTRATION" ;
+		TCID50_AIR_CONCENTRATION:grid_mapping = "latitude_longitude" ;
+		TCID50_AIR_CONCENTRATION:field_name = "Unnamed Field Req 1" ;
+		TCID50_AIR_CONCENTRATION:units = "TCID50 s / m^3" ;


udunits2: Don't recognize "TCID50 s / m^3"

what unit of measure in SI terms is being represented here?

mo-marqh · 2026-01-15T09:14:26Z

example-metadata/NAME/FMD_Fields_grid1_C1_T1_202307030000.cdl

+		latitude_longitude:grid_mapping_name = "latitude_longitude" ;
+		latitude_longitude:longitude_of_prime_meridian = 0.f ;
+		latitude_longitude:earth_radius = 6371229.f ;
+	float TCID50_AIR_CONCENTRATION(latitude, longitude) ;


no standard_name
what is the quantity here?

mo-marqh · 2026-01-15T09:15:56Z

example-metadata/NAME/FMD_Fields_grid1_C1_T1_202307030000.cdl

+	float TCID50_AIR_CONCENTRATION(latitude, longitude) ;
+		TCID50_AIR_CONCENTRATION:long_name = "TCID50_AIR_CONCENTRATION" ;
+		TCID50_AIR_CONCENTRATION:grid_mapping = "latitude_longitude" ;
+		TCID50_AIR_CONCENTRATION:field_name = "Unnamed Field Req 1" ;


unamed fireld req 1 seems a bit obtuse

mo-marqh · 2026-01-15T09:16:21Z

example-metadata/NAME/QVA_grid1_C1_T1_201810221200.cdl

+		latitude_longitude:longitude_of_prime_meridian = 0.f ;
+		latitude_longitude:earth_radius = 6371229.f ;
+	float VOLCANIC_ASH_AIR_CONCENTRATION(flight_level, latitude, longitude) ;
+		VOLCANIC_ASH_AIR_CONCENTRATION:long_name = "VOLCANIC_ASH_AIR_CONCENTRATION" ;


no standard_name

mo-marqh · 2026-01-15T09:16:30Z

example-metadata/NAME/QVA_grid1_C1_T1_201810221200.cdl

+	float VOLCANIC_ASH_AIR_CONCENTRATION(flight_level, latitude, longitude) ;
+		VOLCANIC_ASH_AIR_CONCENTRATION:long_name = "VOLCANIC_ASH_AIR_CONCENTRATION" ;
+		VOLCANIC_ASH_AIR_CONCENTRATION:grid_mapping = "latitude_longitude" ;
+		VOLCANIC_ASH_AIR_CONCENTRATION:field_name = "Unnamed Field Req 1" ;


unclear laebl

mo-marqh · 2026-01-15T09:18:21Z

example-metadata/NAME/FMD_Fields_grid1_C1_T1_202307030000.cdl

+		TCID50_AIR_CONCENTRATION:time_av_int_info = "1day 0hr 0min integral" ;
+		TCID50_AIR_CONCENTRATION:vertical_av_int_info = "Boundary layer average" ;
+		TCID50_AIR_CONCENTRATION:horizontal_av_int_info = "No horizontal averaging" ;
+		TCID50_AIR_CONCENTRATION:cell_methods = "time: sum" ;


cell method not consistent with non-convention av_int info notes (vertical averaging?)

mo-marqh · 2026-01-15T09:19:20Z

example-metadata/NAME/chemet_test1_Fields_grid2_C1_T1_201807031200.cdl

+		height:bounds = "height_bnds" ;
+	float height_bnds(nbounds) ;
+		height_bnds:long_name = "height above ground level start and end point" ;
+	float TRACER_AIR_CONCENTRATION(latitude, longitude) ;


no standard_names

mo-marqh · 2026-01-15T09:22:03Z

example-metadata/NAME/pollen_Fields_grid_conc_C1_T1_202505260100.cdl

+		height:bounds = "height_bnds" ;
+	float height_bnds(nbounds) ;
+		height_bnds:long_name = "height above ground level start and end point" ;
+	float GRASS_POLLEN_CONCENTRATION(latitude, longitude) ;


no standard_name

number_concentration_of_biological_taxon_pollen_grains_in_air
"Number concentration" means the number of particles or other specified objects per unit volume. "Pollen grain" refers to the male gametophyte of seed plants (either angiosperms or gymnosperms). The number concentration of pollen grains refers to the number of individual pollen grains per unit volume. "Biological taxon" is a name or other label identifying an organism or a group of organisms as belonging to a unit of classification in a hierarchical taxonomy. There must be an auxiliary coordinate variable with standard name biological_taxon_name to identify the taxon in human readable format and optionally an auxiliary coordinate variable with standard name biological_taxon_identifier to provide a machine-readable identifier. See Section 6.1.2 of the CF convention (version 1.8 or later) for information about biological taxon auxiliary coordinate variables.

is available, but is a number concentration, not a mass concentration

mo-marqh · 2026-01-15T09:29:53Z

example-metadata/NAME/rsmc_test1_Fields_grid1_C1_T1_201807040000.cdl

+		height:bounds = "height_bnds" ;
+	float height_bnds(nbounds) ;
+		height_bnds:long_name = "height above ground level start and end point" ;
+	float CAESIUM_137_AIR_CONCENTRATION(latitude, longitude) ;


consider standard_name,
https://vocab.nerc.ac.uk/standard_name/integral_wrt_time_of_radioactivity_concentration_of_137Cs_in_air/

mo-marqh · 2026-01-15T09:31:00Z

example-metadata/NAME/rsmc_test1_Fields_grid1_C1_T1_201807040000.cdl

+		CAESIUM_137_AIR_CONCENTRATION:vertical_av_int_info = "Finite Z-average" ;
+		CAESIUM_137_AIR_CONCENTRATION:horizontal_av_int_info = "No horizontal averaging" ;
+		CAESIUM_137_AIR_CONCENTRATION:cell_methods = "time: sum height: mean" ;
+	float CAESIUM_137_DEPOSITION(latitude, longitude) ;


no standard_name CF does not yet include deposition for caesium

mo-marqh

on position in space

some issues exist with coordinate variable missing data and uncertainty about the intent of the grid-mapping coordinate reference system for the latitude and longitude coordinate

@mo-benjaminevans

mo-marqh · 2026-01-15T09:34:51Z

example-metadata/NAME/FMD_Fields_grid1_C1_T1_202307030000.cdl

+		latitude:standard_name = "latitude" ;
+		latitude:units = "degrees_north" ;
+		latitude:axis = "Y" ;
+		latitude:valid_min = 53.02476f ;


missing data is not allowed within coordinate variables.
what is the intent of defining valid_min for these spatial coordinate varaiables?
https://cfconventions.org/Data/cf-conventions/cf-conventions-1.13/cf-conventions.html#missing-data

mo-marqh · 2026-01-15T09:35:30Z

example-metadata/NAME/FMD_Fields_grid1_C1_T1_202307030000.cdl

+		forecast_reference_time:calendar = "gregorian" ;
+	char z_bla(string23) ;
+		z_bla:long_name = "z" ;
+	int latitude_longitude ;


this grid_mapping defines a spherical earth for spatial coordinates, is that the intent?

mo-marqh · 2026-01-15T09:38:37Z

example-metadata/NAME/FMD_Fields_grid1_C1_T1_202307030000.cdl

+		longitude:standard_name = "longitude" ;
+		longitude:units = "degrees_east" ;
+		longitude:axis = "X" ;
+		longitude:valid_min = -2.663774f ;


coordinate variable

mo-marqh · 2026-01-15T09:39:45Z

example-metadata/NAME/QVA_grid1_C1_T1_201810221200.cdl

+		latitude:standard_name = "latitude" ;
+		latitude:units = "degrees_north" ;
+		latitude:axis = "Y" ;
+		latitude:valid_min = -89.875f ;


mo-marqh · 2026-01-15T09:39:51Z

example-metadata/NAME/QVA_grid1_C1_T1_201810221200.cdl

+		longitude:standard_name = "longitude" ;
+		longitude:units = "degrees_east" ;
+		longitude:axis = "X" ;
+		longitude:valid_min = -179.875f ;


mo-marqh · 2026-01-15T09:40:32Z

example-metadata/NAME/QVA_grid1_C1_T1_201810221200.cdl

+		flight_level:long_name = "flight level" ;
+		flight_level:axis = "Z" ;
+		flight_level:positive = "up" ;
+		flight_level:valid_min = 25.f ;


coordinate variable should not define missing data, valid-min etc.

Add NAME cdl files

a84b002

mo-marqh reviewed Jan 15, 2026

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mo-marqh requested changes Jan 15, 2026

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Add NAME cdl files #13

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mo-benjaminevans commented Dec 15, 2025 •

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