Page History

...

Requested variables from providers

Static Data

GRIB			netCDF
name	parameter ID	units	CF standard name	canonical units
Land-sea mask	172	(0-1)	land_area_fraction	1
Geopotential	129	m² s^-2	surface_altitude	m

Surface Fields

Sub-daily data

	GRIB			netCDF
time step	name	parameter ID	units	CF standard name	canonical units
6h	2 metre temperature	167	K	air_temperature	K
6h	2 metre dewpoint temperature	168	K	dew_point_temperature	K
6h	10 metre U wind component	165	m s^-1	x_wind	m s^-1
6h	10 metre V wind component	166	m s^-1	y_wind	m s^-1
6h	Mean sea level pressure	151	Pa	air_pressure_at_sea_level	Pa
6h	Total cloud cover	164	(0-1)	cloud_area_fraction	1
6h	Soil temperature level 1	139	K	soil_temperature	K
6h	Sea surface temperature ⁽¹⁾	34	K	sea_surface_temperature	K
6h	Sea ice temperature ⁽¹⁾	500172	K	sea_ice_temperature	K

(1) For GRIB data streams, those variables can be included as a composite field with parameter ID=139

Daily instantaneous data

	GRIB			netCDF
time step	name	parameter ID	units	CF standard name	canonical units
24h	Sea-ice cover	31	(0-1)	sea_ice_area_fraction	1
24h	Volumetric soil water layer 1 ⁽²⁾	39	m³ m^-3	mass_content_of_water_in_soil_layer ⁽²⁾	kg m^-2
24h	Volumetric soil water layer 2 ⁽²⁾	40	m³ m^-3
24h	Volumetric soil water layer 3 ⁽²⁾	41	m³ m^-3
24h	Volumetric soil water layer 4 ⁽²⁾	42	m³ m^-3
24h	Snow depth	141	m of water equivalent	lwe_thickness_of_surface_snow_amount	m
24h	Snow density	33	kg m^-3	snow_density	kg m^-3

(2) soil water content should be provided for all native model levels (so 39-42 GRIB parameter IDs just apply to ECMWF/IFS soil model)

Daily time-aggregated data (accumulations, max/min,etc)

	GRIB			netCDF
time step	name	parameter ID	units	CF standard name	canonical units
24h	Maximum temperature at 2 metres in the last 24 hours	51	K	air_temperature	K
24h	Minimum temperature at 2 metres in the last 24 hours	52	K	air_temperature	K
24h	10 metre wind gust since previous post-processing	49	m s^-1	wind_speed_of_gust	m s^-1
24h	Large-scale precipitation ⁽³⁾	142	m	lwe_thickness_of_stratiform_precipitation_amount ⁽³⁾	m
24h	Convective precipitation ⁽³⁾	143	m	lwe_thickness_of_convective_precipitation_amount ⁽³⁾	m
24h	Total precipitation	228	m	lwe_thickness_of_precipitation_amount	m
24h	Snowfall	144	m of water equivalent	lwe_thickness_of_snowfall_amount	m
24h	Surface sensible heat flux	146	J m^-2	integral_of_surface_downward_sensible_heat_flux_wrt_time	W s m^-2
24h	Surface latent heat flux	147	J m^-2	integral_of_surface_downward_latent_heat_flux_wrt_time	W s m^-2
24h	Surface solar radiation downwards	169	J m^-2	integral_of_surface_downwelling_shortwave_flux_in_air_wrt_time	W s m^-2
24h	Surface thermal radiation downwards	175	J m^-2	integral_of_surface_downwelling_longwave_flux_in_air_wrt_time	W s m^-2
24h	Surface net solar radiation	176	J m^-2	integral_of_surface_net_downward_shortwave_flux_wrt_time	W s m^-2
24h	Surface net thermal radiation	177	J m^-2	integral_of_surface_net_downward_longwave_flux_wrt_time	W s m^-2
24h	Top net solar radiation	178	J m^-2	integral_of_toa_net_downward_shortwave_flux_wrt_time	W s m^-2
24h	Top incoming solar radiation	174089	J m^-2	integral_of_toa_incoming_shortwave_flux_wrt_time (!)	W s m^-2
24h	Top net thermal radiation	179	J m^-2	integral_of_toa_net_downward_longwave_flux_wrt_time ^(!)	W s m^-2
24h	Eastward turbulent surface stress	180	N m^-2 s	integral_of_surface_downward_eastward_stress_wrt_time	Pa s
24h	Northward turbulent surface stress	181	N m^-2 s	integral_of_surface_downward_northward_stress_wrt_time	Pa s
24h	Evaporation	182	m of water equivalent	lwe_thickness_of_water_evaporation_amount	m
24h	Runoff ⁽⁴⁾	205	m	runoff_amount ⁽⁴⁾	kg m^-2
24h	Surface runoff	8	m	surface_runoff_amount	kg m^-2
24h	Sub-surface runoff	9	m	subsurface_runoff_amount	kg m^-2

(3) Large-scale and convective precipitation are not required if total precipitation is provided (and viceversa)
(4) Runoff is not required if both surface and sub-surface runoff are provided (and viceversa)
(!) Those names are not included within the list of CF standard_names, but they have been derived from existing standard names (toa_incoming_shortwave_flux, toa_net_downward_longwave_flux) following the Guidelines for Construction of CF Standard Names

...

At the following 11 pressure levels (hPa): 925, 850, 700, 500, 400, 300, 200, 100, 50, 30 and 10

	GRIB			netCDF
time step	name	parameter ID	units	CF standard name	canonical units
12h	Geopotential	129	m² s^-2	geopotential_height	m

² s^-2


12h	Temperature	130	K	air_temperature	K
12h	Specific humidity	133	kg kg^-1	specific_humidity	1
12h	Vorticity (relative) (*)	138	s^-1	atmosphere_relative_vorticity (*)	s^-1
12h	Divergence (*)	155	s^-1	divergence_of_wind (*)	s^-1
12h	U component of wind	131	m s^-1	x_wind	m s^-1
12h	V component of wind	132	m s^-1	y_wind	m s^-1

(*) Vorticity and divergence are not required if U and V are provided (and viceversa)

...

Space shortcuts

Page tree

Versions Compared

Old Version 5

New Version 6

Key