Parameters forming part of the Weather and Geophysical Extremes Digital Twin (DT) are investigated here. See the encodings below, which are current for ecCodes 2.3233.10.

Warning

title	Additional keys

Please note that additional keys are often necessary in addition to the base parameter definition below. For example for:

statistical processing (e.g. time interval of processing)
level information (e.g. a given pressure level, say 300 hPa)

Legend:

Parameter ready for GRIB2 archiving

Parameter with clarifications required for GRIB2 archiving

Parameter which needs to be created/modified for GRIB2 archiving

Contents:

Table of Contents

maxLevel	3

...

Atmosphere

Time resolution: Hourly.

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of First Fixed Surface	scale Factor Of First Fixed Surface	scaled Value Of First Fixed Surface	type Of Second Fixed Surface	local Tables Version	comments
31	Sea ice area fraction	ci	(0 - 1)	10	2	0	1					GG
34	Sea surface temperature	sst	K	10	3	0	1					GG
78	Total column cloud liquid water	tclw	kg m**-2	0	1	69	1			8		GG
134	Surface pressure	sp	Pa	0	3	0	1					GG
136	Total column water	tcw	kg m**-2	0	1	51	1			8		GG
137	Total column vertically-integrated water vapour	tcwv	kg m**-2	0	1	64	1			8		GG
151	Mean sea level pressure	msl	Pa	0	3	0	101					GG
165	10 metre U wind component	10u	m s**-1	0	2	2	103	0	10			GG
166	10 metre V wind component	10v	m s**-1	0	2	3	103	0	10			GG
167	2 metre temperature	2t	K	0	0	0	103	0	2			GG
168	2 metre dewpoint temperature	2d	K	0	0	6	103	0	2			GG
228029	Instantaneous 10 metre wind gust	i10fg	m s**-1	0	2	22	103	0	10			GG
228218	Convective rain rate	crr	kg m-2 s-1	0	1	76	1					GG
228219	Large scale rain rate	lsrr	kg m-2 s-1	0	1	77	1					GG
228235	Most-unstable CAPE	mucape	J kg**-1	0	7	6	17					GG. Used rather than 59; cape, which is phased out.
260015	Precipitation type	ptype	code table (4.201)	0	1	19						GG
~~164~~	~~Total cloud cover~~	~~tcc~~	~~(0 - 1)~~	0	6	~~192~~	1			8	1	GG. ECMWF unit. Not yet supported by ExtremesDT IFS.
~~3020~~	~~Visibility~~	~~vis~~	m	0	19	0	~~103~~	0	10			GG
~~162071~~	~~Vertical integral of eastward water vapour flux~~	~~viwve~~	~~kg m-1 s-1~~	0	1	~~150~~	1			8		GG
~~162072~~	~~Vertical integral of northward water vapour flux~~	~~viwvn~~	~~kg m-1 s-1~~	0	1	~~151~~	1			8		GG
~~228003~~	~~Friction velocity~~	~~zust~~	~~m s**-1~~	10	0	17						GG. Not yet supported by ExtremesDT IFS.
~~228050~~	~~Instantaneous total lightning flash density~~	~~litoti~~	~~km-2 day-1~~	0	17	4	1			8		GG. Not yet supported by ExtremesDT IFS.
~~228164~~	~~Total Cloud Cover~~	~~tcc~~	%	0	6	1	1			8		GG. WMO unit. Not yet supported by ExtremesDT IFS.
~~228221~~	~~Large scale snowfall rate water equivalent~~	~~lssfr~~	~~kg m-2 s-1~~	0	1	56	1					GG. Not yet supported by ExtremesDT IFS.
~~228236~~	~~Most-unstable CIN~~	~~mucin~~	~~J kg**-1~~	0	7	7	17					GG. Used rather than 228001; cin, which is phased out. Not yet supported by ExtremesDT IFS.
~~231013~~	~~Reflectance in 0.4 micron channel~~	~~rfl04~~	%	3	1	30						GG. Not yet supported by ExtremesDT IFS.
~~260227~~	~~Reflectance in 0.6 micron channel~~	~~rfl06~~	%	3	1	9						GG. Not yet supported by ExtremesDT IFS.
~~260228~~	~~Reflectance in 0.8 micron channel~~	~~rfl08~~	%	3	1	10						GG. Not yet supported by ExtremesDT IFS.
~~260510~~	~~Cloudy brightness temperature~~	~~clbt~~	K	3	1	14						GG. Needs Simulated Satellite mode on...

Wave

Time resolution:Hourly.

param Id	name	short Name	units	discipline	parameter Number	type Of First Fixed Surface	comments
140221	Mean zero-crossing wave period	mp2	s	10	28		GG
140229	Significant height of combined wind waves and swell	swh	m	10	3	101	GG
140230	Mean wave direction	mwd	degrees	10	14		GG
140231	Peak wave period	pp1d	s	10	34		GG
140232	Mean wave period	mwp	s	10	15		GG

Ocean

Time resolution: Hourly.

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of First Fixed Surface	scale Factor Of First Fixed Surface	scaled Value Of First Fixed Surface	type Of Second Fixed Surface	scale Factor Of Second Fixed Surface	scaled Value Of Second Fixed Surface	type Of Statistical Processing	local Tables Version	comments
262121	Vertically-integrated heat content in the upper 300 m	hc300m	J m**-2	10	4	22	160	0	0	160	0	300			O2D

Fields on pressure levels

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21 pressure levels: (1, 2, 3, 5, 7, 10, 20, 30, 50, 70, 100, 150, 200, 250, 300, 400, 500, 700, 850, 925, 1000)

param Id	name	short Name	units	parameter Category	parameter Number	type Of First Fixed Surface	comments
130	Temperature	t	K	0	0	100	GG
131	U component of wind	u	m s**-1	2	2	100	GG
132	V component of wind	v	m s**-1	2	3	100	GG
133	Specific humidity	q	kg kg**-1	1	0	100	GG
138	Vorticity (relative)	vo	s**-1	2	12	100	SH
155	Divergence	d	s**-1	2	13	100	SH
156	Geopotential height	gh	gpm	3	5	100	GG
157	Relative humidity	r	%	1	1	100	GG

Fields on model levels

Atmosphere

...

137 model levels: (137, 136, ..., 1) - L137 model level definitions

param Id	name	short Name	units	parameter Category	parameter Number	type Of First Fixed Surface	comments
75	Specific rain water content	crwc	kg kg**-1	1	85	105	GG. Not in official portfolio.
76	Specific snow water content	cswc	kg kg**-1	1	86	105	GG. Not in official portfolio.
77	Eta-coordinate vertical velocity	etadot	s**-1	2	32	105	GG. Not in official portfolio.
130	Temperature	t	K	0	0	105	GG. Not in official portfolio.
131	U component of wind	u	m s**-1	2	2	105	GG. Not in official portfolio.
132	V component of wind	v	m s**-1	2	3	105	GG. Not in official portfolio.
133	Specific humidity	q	kg kg**-1	1	0	105	GG. Not in official portfolio.
135	Vertical velocity	w	Pa s**-1	2	8	105	GG. Also called omega. Not in official portfolio.
246	Specific cloud liquid water content	clwc	kg kg**-1	1	83	105	GG. Not in official portfolio.
247	Specific cloud ice water content	ciwc	kg kg**-1	1	84	105	GG. Not in official portfolio.
248	Fraction of cloud cover	cc	(0-1)	6	32	105	GG. Not in official portfolio.
260238	Geometric vertical velocity	wz	m s**-1	2	9	105	GG. Not in official portfolio. Replaces 120; Exper. product

Sea-ice/snow/soil

Time resolution: Hourly.
4 model levels: (1, ..., 4)

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of First Fixed Surface	scale Factor Of First Fixed Surface	scaled Value Of First Fixed Surface	type Of Second Fixed Surface	scale Factor Of Second Fixed Surface	scaled Value Of Second Fixed Surface	type Of Statistical Processing	local Tables Version	comments
260360	Soil temperature	sot	K	2	3	18	151	0	N-1	151	0	N			GG. For soil layer N. Replaces: 139; stl1 170; stl2 183; stl3 236; stl4
260199	Volumetric soil moisture	vsw	m3 m-3	2	0	25	151	0	N-1	151	0	N			GG. For soil layer N. Replaces: 39; swvl1 40; swvl2 41; swvl3 42; swvl4

Fields on height levels

Time resolution:Hourly.

Currently 100m only. These are only for height levels >10m to preserve backwards compatibility with longstanding model fields (2t, 10u, 10v,...)

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of First Fixed Surface	scale Factor Of First Fixed Surface	scaled Value Of First Fixed Surface	type Of Second Fixed Surface	scale Factor Of Second Fixed Surface	scaled Value Of Second Fixed Surface	type Of Statistical Processing	local Tables Version	comments
228246	100 metre U wind component	100u	m s**-1	0	2	2	103	0	100						GG
228247	100 metre V wind component	100v	m s**-1	0	2	3	103	0	100						GG

Mean encodings

Fields on a single level or surface

...

Time resolution: 6 hourly means.

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of First Fixed Surface	scale Factor Of First Fixed Surface	scaled Value Of First Fixed Surface	type Of Second Fixed Surface	scale Factor Of Second Fixed Surface	scaled Value Of Second Fixed Surface	type Of Statistical Processing	local Tables Version	comments
228058	Averaged total lightning flash density in the last 6 hours	litota6	km-2 day-1	0	17	4	1			8			0		GG

Accumulated encodings

Fields on a single level or surface

...

Time resolution: Hourly accumulations.

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of First Fixed Surface	type Of Statistical Processing	local Tables Version	comments
142	Large-scale precipitation	lsp	m	0	1	196	1	1	1	GG. ECMWF unit.
144	Snowfall	sf	m of water equivalent	0	1	198	1	1	1	GG. ECMWF unit.
169	Surface short-wave (solar) radiation downwards	ssrd	J m**-2	0	4	7	1	1		GG
175	Surface long-wave (thermal) radiation downwards	strd	J m**-2	0	5	3	1	1		GG
176	Surface net short-wave (solar) radiation	ssr	J m**-2	0	4	9	1	1		GG
177	Surface net long-wave (thermal) radiation	str	J m**-2	0	5	5	1	1		GG
178	Top net short-wave (solar) radiation	tsr	J m**-2	0	4	9	8	1		GG
179	Top net long-wave (thermal) radiation	ttr	J m**-2	0	5	5	8	1		GG
180	Time-integrated eastward turbulent surface stress	ewss	N m**-2 s	0	2	62	1	1		GG.
181	Time-integrated northward turbulent surface stress	nsss	N m**-2 s	0	2	63	1	1		GG.
205	Runoff	ro	m	2	0	201		1	1	GG. ECMWF unit.
228	Total precipitation	tp	m	0	1	193	1	1	1	GG. ECMWF unit.
3062	Large-scale precipitation	lsp	kg m**-2	0	1	54	1	1		GG. WMO unit.
228143	Convective precipitation	cp	kg m**-2	0	1	37	1	1		GG
228144	Snowfall water equivalent	sf	kg m**-2	0	1	53	1	1		GG. WMO unit.
228216	Accumulated freezing rain	fzra	m	0	1	194	1	1	1	GG. ECMWF unit.
228228	Total Precipitation	tp	kg m**-2	0	1	52	1	1		GG. WMO unit.
231001	Accumulated freezing rain water equivalent	fzrawe	kg m**-2	0	1	67	1	1		GG. WMO unit.
231002	Runoff water equivalent (surface plus subsurface)	rowe	kg m**-2	2	0	42		1		GG. WMO unit.

Maximum encodings

Fields on a single level or surface

...

Time resolution: Hourly max.

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of First Fixed Surface	scale Factor Of First Fixed Surface	scaled Value Of First Fixed Surface	type Of Second Fixed Surface	scale Factor Of Second Fixed Surface	scaled Value Of Second Fixed Surface	type Of Statistical Processing	local Tables Version	comments
49	10 metre wind gust since previous post-processing	10fg	m s**-1	0	2	22	103	0	10				2		GG

Minimum encodings

There are no minimum encodings for this dataset.

...

The conversion between the base parameter, mean and accumulation is as follows for relevant parameters:

Inst paramId	Mean paramId	Accum paramId
...	...	...

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Versions Compared

Old Version 7

New Version 8

Key

Atmosphere

Wave

Ocean

Fields on pressure levels

Fields on model levels

Atmosphere

Sea-ice/snow/soil

Fields on height levels

Mean encodings

Fields on a single level or surface

Accumulated encodings

Fields on a single level or surface

Maximum encodings

Fields on a single level or surface

Minimum encodings

Page tree

Page History

Versions Compared

Old Version 7

New Version 8

Key

Atmosphere

Wave

Ocean

Fields on pressure levels

Fields on model levels

Atmosphere

Sea-ice/snow/soil

Fields on height levels

Mean encodings

Fields on a single level or surface

Accumulated encodings

Fields on a single level or surface

Maximum encodings

Fields on a single level or surface

Minimum encodings