Parameters forming part of the Weather and Geophysical Extremes Digital Twin (DT) are investigated here. See the encodings below, which are current for ecCodes 2.3133.20.

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:

...

Data availability

Currently only the fields in Secn 1.1.1 and 1.1.2 are available on the LUMI databridge as part of the first production-like ExtremesDT runs.

This is currently in class=rd,expver=i7yv,stream=oper,type=fc

Info

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)

Any entry with localTablesVersion=1 should not be used in production outside ECMWF.

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

Instantaneous encodings

Fields on a single level or surface

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

Time resolution

3 hourly for fields kept throughout phase 1 – or hourly for 1 or 2 days only. Ultimate goal to store sub-hourly.

Fields on a single level or surface

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

165

10 metre U wind component

10u

m s**-1

0

2

103

0

10

GG

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

166

10 metre V wind component

10v

m s**-1

0

2

3

103

0

10

GG

167

2 metre temperature

2t

K

0

103

0

2

GG

151

Mean sea level pressure

msl

Pa

0

3

0

101

1

GG

205

136

Runoff

Total column water

ro

tcw

kg m

**-2

0

201

1

51

1

8

GG

.
ECMWF unit.

231002

Runoff water equivalent

rowe


137	Total column vertically-integrated water vapour	tcwv	kg m**-2

2

0

1

42

64

1

8

GG

.

WMO unit.

134

Surface

151	Mean sea level pressure

sp

msl

Pa

0

3

0

1

101

GG

136

Total column water

tcw

165

10 metre U wind component

10u

m s

kg m

**-

2

1

0

1

2

51

2

103

1

0

8

10

GG

228

Total precipitation

tp

166

10 metre V wind component

10v

m s**-1

m

0

1

2

193

3

1

103

255

0

1

10

1

GG

.

ECMWF unit.

228228

Total Precipitation

tp

167

2 metre temperature

2t

K

0

kg m**-2

0

1

0

52

103

1

0

1

2

GG

.
WMO unit.

140221

Mean zero-crossing wave period

mp2

s

10

0

28

GG

140230

Mean wave direction

mwd

degrees

10

0

14

GG

140232

Mean wave period

mwp

s

10

0

15

GG

140231

Peak wave period

pp1d

s

10

0

34

GG

140229

Significant height of combined wind waves and swell

swh

m

10

0

3

101

GG

260360

Soil temperature

sot

K

2

3

18

1510015101GG.
Replaces 139; stl1

260360

Soil temperature

sot

K

2

3

18

1510115102GG.
Replaces 170; stl2

260360

Soil temperature

sot

K

2

3

18

1510215103GG.
Replaces 183; stl3

260360

Soil temperature

sot

K

2

3

18

1510315104

GG.
Replaces 236; stl4

49

10 metre wind gust since previous post-processing

10fg


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~~

m

~~s**-1~~

0

2

1

22

~~151~~

103

0

10

1

8

2

GG

228246

100 metre U wind component

~~228003~~

~~Friction velocity~~

~~zust~~

100u103

~~m s**-1~~

0

2

10

0

100

17

GG

228247

100 metre V wind component

100v

. Not yet supported by ExtremesDT IFS.
~~228050~~	~~Instantaneous total lightning flash density~~	~~litoti~~	~~km**-2 day~~

m s

**-1

0

2

17

3

4

103

1

0

8

100

GG

168

2 metre dewpoint temperature

2d

K

. Not yet supported by ExtremesDT IFS.
~~228164~~	~~Total Cloud Cover~~	~~tcc~~	%

0

6

103

1

0

1

2

8

GG

231001

. WMO unit. Not yet supported by ExtremesDT IFS.
~~228221~~	~~Large scale snowfall rate~~

Accumulated freezing rain

~~water equivalent~~

fzrawe1

~~lssfr~~

~~kg m**-2 s**-1~~

0

1

67

56

1

GG.

WMO unit

Not yet supported by ExtremesDT IFS.

228216

Accumulated freezing rain

fzra

m

0

1

194

1

GG.
ECMWF unit.

~~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

Time resolution: Hourly.

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	discipline	parameter Category	parameter Number	type Of First Fixed Surface	comments
130	Temperature	t	K	0	0	0	100	GG
131	U component of wind	u	m s**-1	0	2	2	100	GG
132	V component of wind	v	m

262121

Vertically-integrated heat content in the upper 300 m

hc300m

J m**-2

10

4

22

160

0

160

0

300

O2D
228058
Averaged total lightning flash density in the last 6 hours
litota6
km**-2 day**-1
0
17
4
1
8
0
GG
228235
Most-unstable CAPE
mucape
J kg**-1
0
7
6
17
GG.
Used rather than 59; cape, which is phased out.
228236
Most-unstable CIN
mucin
J kg**-1
0
7
7
17
GG.
Used rather than 228001; cin, which is phased out.
228143
Convective precipitation
cp
kg m**-2
0
1
37
1
1
GG
228218
Convective rain rate
crr
kg m**-2
s**-1
0
1
2
76
3
1
100

GG
180
Eastward turbulent surface stress
ewss
133
Specific humidity
q
kg kg
N m
**-
2 s
1
0
2
1
381
0
1
228003
Friction velocity
zust
m
100

GG
. Awaiting new WMO encoding with correct units.
138
Vorticity (relative)
vo
s**-1
10
0
2
0
12
17
100
GGm

SH
228029
Instantaneous 10 metre wind gust
i10fg
155
Divergence
d
s**-1
0
2
22
103
2
13
100

SH
156
Geopotential height
gh
gpm
0
3
5
100

GG
157
Relative humidity
r
%
0
10
1
GG
1
228050
Instantaneous total lightning flash density
litoti
km**-2 day**-1
0
17
4
1
8
GG
228219
Large scale rain rate
lsrr
kg m**-2 s**-1
0
1
77
1
GG
228221
Large scale snowfall rate water equivalent
lssfr
kg m**-2 s**-1
0
1
56
1
GG
3062
Large-scale precipitation
lsp
kg m**-2
0
1
54
1
1
GG.
WMO unit.
142
Large-scale precipitation
lsp
m
0
1
196
1
1
1
GG.
ECMWF unit.
181
Northward turbulent surface stress
nsss
N m**-2 s
0
2
37
1
1
GG. Awaiting new WMO encoding with correct units.
260015
Precipitation type
ptype
code table (4.201)
0
1
19
GG
31
Sea ice area fraction
ci
(0 - 1)
10
2
0
1
GG
34
Sea surface temperature
sst
K
10
3
0
1GG
231013
Reflectance in 0.4 micron channel
rfl04
%
3
1
30
GG
260227
Reflectance in 0.6 micron channel
rfl06
%
3
1
9
GG
260228
Reflectance in 0.8 micron channel
rfl08
%
3
1
10
GG
260510
Cloudy brightness temperature
clbt
K
3
1
14
GG
228144
Snowfall water equivalent
sf
kg m**-2
0
1
53
1
1
GG.
WMO unit.
144
Snowfall
sf
m of water equivalent
0
1
198
1
1
1
GG.
ECMWF unit.
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
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
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
228164
Total Cloud Cover
tcc
%
0
6
1
1
8
GG.
WMO unit.
164
Total cloud cover
tcc
(0 - 1)
0
6
192
1
8
1
GG.
ECMWF unit.
78
Total column cloud liquid water
tclw
kg m**-2
0
1
69
1
8
GG
137
Total column vertically-integrated water vapour
tcwv
kg m**-2
0
1
64
1
8
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
3020
Visibility
vis
m
0
19
0
103
0
10
GG
260199
Volumetric soil moisture
vsw
m**3 m**-3
2
0
25
151
0
0
151
0
1
GG.
Replaces 39; swvl1
260199
Volumetric soil moisture
vsw
m**3 m**-3
2
0
25
151
0
1
151
0
2
GG.
Replaces 40; swvl2
260199
Volumetric soil moisture
vsw
m**3 m**-3
2
0
25
151
0
2
151
0
3
GG.
Replaces 41; swvl3
260199
Volumetric soil moisture
vsw
m**3 m**-3
2
0
25
151
0
3
151
0
4
GG.
Replaces 42; swvl4

Fields on pressure levels

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

...

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

...

155

...

Divergence

...

d

...

s**-1

...

0

...

2

...

13

...

100

...

SH

...

156

...

Geopotential height

...

gh

...

gpm

...

0

...

3

...

5

...

100

...

GG

...

133

...

Specific humidity

...

q

...

kg kg**-1

...

0

...

1

...

0

...

100

...

GG

...

157

...

Relative humidity

...

r

...

%

...

0

...

1

...

1

...

100

...

GG

...

130

...

Temperature

...

t

...

K

...

0

...

0

...

0

...

100

...

GG

...

131

...

U component of wind

...

u

...

m s**-1

...

0

...

2

...

2

...

100

...

GG

100

GG

Fields on model levels

Atmosphere

Time resolution: Hourly.

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

Atmosphere

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

Atmosphere

Time resolution: Hourly accumulations since the start of the forecast, i.e. 0-1, 0-2, 0-3, ..., 0-96.

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

Atmosphere

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

...

132

...

V component of wind

...

v

...

m s**-1

...

0

...

2

...

3

...

100

...

GG

...

138

...

Vorticity (relative)

...

vo

...

s**-1

...

0

...

2

...

12

...

100

...

SH

Fields on model levels

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

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

77Eta-coordinate vertical velocityetadots**-10232
105
GG. Not in official portfolio.
248Fraction of cloud covercc(0-1)0632
105
GG. Not in official portfolio.
260238Geometric vertical velocitywzm s**-1029
105
GG. Not in official portfolio. Replaces 120; Exper. product
247Specific cloud ice water contentciwckg kg**-10184
105
GG. Not in official portfolio.
246Specific cloud liquid water contentclwckg kg**-10183
105
GG. Not in official portfolio.
133Specific humidityqkg kg**-1010
105
GG. Not in official portfolio.
75Specific rain water contentcrwckg kg**-10185
105
GG. Not in official portfolio.
76Specific snow water contentcswckg kg**-10186
105
GG. Not in official portfolio.
130TemperaturetK000
105
GG. Not in official portfolio.
131U component of windu
m s**-1
0
2
2
22
105
GG. Not in official portfolio.
132V component of windvm s**-1023
105
GG. Not in official portfolio.
135Vertical velocitywPa s**-1028
105
GG. Also called omega. Not in official portfolio
103
0
10

2

GG

Minimum encodings

There are no minimum encodings for this dataset.

Conversions

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 1

New Version Current

Key

Instantaneous encodings

Fields on a single level or surface

Atmosphere

Fields on a single level or surface

Wave

Ocean

Fields on pressure levels

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

Atmosphere

Accumulated encodings

Fields on a single level or surface

Atmosphere

Maximum encodings

Fields on a single level or surface

Atmosphere

Fields on model levels

Minimum encodings

Conversions

	2	13	100					SH
156	Geopotential height	gh	gpm	0	3	5	100		GG
157	Relative humidity	r	%	0

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Key

Instantaneous encodings

Fields on a single level or surface

Atmosphere

Fields on a single level or surface

Wave

Ocean

Fields on pressure levels

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

Atmosphere

Accumulated encodings

Fields on a single level or surface

Atmosphere

Maximum encodings

Fields on a single level or surface

Atmosphere

Fields on model levels

Minimum encodings

Conversions