Parameters forming part of the Climate Change Adaptation Digital Twin (DT) are investigated here. See the encodings below, which are current for ecCodes 2.33.0.

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:

1. Instantaneous encodings

1.1. Fields on a single level or surface

1.1.1. 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

scale Factor Of Second Fixed Surface

scaled Value Of Second Fixed Surface

type Of Statistical Processing

local Tables Version

comments

78

Total column cloud liquid water

tclw

kg m**-2

0

1

69

1



8





GG

79

Total column cloud ice water

tciw

kg m**-2

0

1

70

1



8






134

Surface pressure

sp

Pa

0

3

0

1








GG

137

Total column vertically-integrated water vapour

tcwv

kg m**-2

0

1

64

1



8





GG

141

Snow depth

sd

m of water equivalent

0

1

254

1







1

GG. Depth of snow with conversion to water. ECMWF unit.

148

Charnock

chnk

Numeric

10

0

76

1








GG

151

Mean sea level pressure

msl

Pa

0

3

0

101








GG

159

Boundary layer height

blh

m

0

3

18

1








GG

164

Total cloud cover

tcc

(0 - 1)

0

6

192

1



8




1

GG.
ECMWF unit.

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

186

Low cloud cover

lcc

(0 - 1)

0

6

193

1



100

0

80000


1

GG.
ECMWF unit.

187

Medium cloud cover

mcc

(0 - 1)

0

6

194

100

0

80000

100

0

45000


1

GG.
ECMWF unit.

188

High cloud cover

hcc

(0 - 1)

0

6

195

100

0

45000

8




1

GG.
ECMWF unit.

235

Skin temperature

skt

K

0

0

17

1








GG

260048

Total precipitation rate

tprate

kg m**-2 s**-1

0

1

52

1








GG

3066

Snow depth

sde

m

0

1

11

114








GG. Depth of snow without conversion to water.
Not yet supported by ClimateDT IFS.

3073

Low cloud cover

lcc

%

0

6

3

1



100

0

80000



GG.
WMO unit.
Not yet supported by ClimateDT IFS.

3074

Medium cloud cover

mcc

%

0

6

4

100

0

80000

100

0

45000



GG.
WMO unit.
Not yet supported by ClimateDT IFS.

3075

High cloud cover

hcc

%

0

6

5

100

0

45000

8





GG.
WMO unit.
Not yet supported by ClimateDT IFS.

228141

Snow depth water equivalent

sd

kg m**-2

0

1

60

1








GG. Depth of snow with conversion to water. WMO unit.
Not yet supported by ClimateDT IFS.

228164

Total Cloud Cover

tcc

%

0

6

1

1



8





GG.
WMO unit.
Not yet supported by ClimateDT IFS.

210061

Carbon dioxide mass mixing ratio

co2

kg kg**-1

0

20

2









GG. With key {chemicalConstituent=3; is_chemical=1} for CO2. Need also productionStatusOfProcessedData=12 to get DE pseudocentre encoding.
Not yet supported by ClimateDT IFS.

260510

Cloudy brightness temperature

clbt

K

3

1

14









GG.
Needs Simulated Satellite mode on, which we won't activate for ClimateDT.

1.1.2. Sea ice

Time resolution: Hourly (when produced)

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

262000

Sea ice thickness

sithick

m

10

2

1

174

missingmissing176missingmissing



O2D

262001

Sea ice area fraction

siconc

Fraction

10

2

0

174

missingmissing176missingmissing



O2D

262003

Eastward sea ice velocity

siue

m s**-1

10

2

4

174

missingmissing176missingmissing



O2D

262004

Northward sea ice velocity

sivn

m s**-1

10

2

5

174

missingmissing176missingmissing



O2D

262008

Sea ice volume per unit area

sivol

m**3 m**-2

10

2

15

174

missingmissing176missingmissing



O2D

262009

Snow volume over sea ice per unit area

snvol

m**3 m**-2

10

2

16

173

missingmissing175missingmissing



O2D

262021

X-component of sea ice velocity

six

m s**-1

10

2

24

174

missingmissing176missingmissing



O2D

262022

Y-component of sea ice velocity

siy

m s**-1

10

2

25

174

missingmissing176missingmissing



O2D

1.1.3. Ocean

Time resolution: Hourly (when produced)

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

262100

Sea surface practical salinity

sos

g kg**-1

10

3

3

16000missingmissingmissing



O2D

262101

Sea surface temperature

tos

K

10

3

0

16000missingmissingmissing



O2D

262121

Vertically-integrated heat content in the upper 300 m

hc300m

J m**-2

10

4

22

160001600300



O2D

262122

Vertically-integrated heat content in the upper 700 m

hc700m

J m**-2

10

4

22

160001600700



O2D

262124

Sea surface height

zos

m

10

3

1

16000missingmissingmissing



O2D

262145

Sea surface salinity

sss

kg kg**-1

10

3

21

16000missingmissingmissing



O2D.

Will use practical salinity.

XXX

Vertically integrated meridional volume transport

XXX

m**3 m**-1 s**-1

10

4

44









O2D. Awaiting input from ClimateDT.

1.2. Fields on pressure levels

Time resolution: Hourly

19 pressure levels: (1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 70, 50, 30, 20, 10, 5, 1)

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

60

Potential vorticity

pv

K m**2 kg**-1 s**-1

0

2

14

100








GG

129

Geopotential

z

m**2 s**-2

0

3

4

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

132

V component of wind

v

m s**-1

0

2

3

100








GG

133

Specific humidity

q

kg kg**-1

0

1

0

100








GG

135

Vertical velocity

w

Pa s**-1

0

2

8

100








GG.
This is in "Pa s-1" not "m s-1".

157

Relative humidity

r

%

0

1

1

100








GG

246

Specific cloud liquid water content

clwc

kg kg**-1

0

1

83

100








GG

138

Vorticity (relative)

vo

s**-1

0

2

12

100








SH.
Not needed if we have U and V wind components.

155

Divergence

d

s**-1

0

2

13

100








SH.
Not needed if we have U and V wind components.

156

Geopotential height

gh

gpm

0

3

5

100








GG.
Not yet supported by ClimateDT IFS.
Can be computed using geopotential - added below.

1.3. Fields on model levels

1.3.1. Atmosphere

Time resolution: ...

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 windum s**-1022

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.

1.3.2. Ocean

Time resolution: Hourly (when produced)

75 model levels: (1, ..., 75)

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

262500

Sea water practical salinity

so

g kg**-1

10

4

21

168

168



O3D

262501

Sea water potential temperature

thetao

K

10

4

18

168

168



O3D

262505

Northward sea water velocity

von

m s**-1

10

4

24

168

168



O3D

262506

Eastward sea water velocity

uoe

m s**-1

10

4

23

168

168



O3D

262507

Upward sea water velocity

wo

m s**-1

10

4

27

168

168



O3D

262516

Sea water salinity

salo

kg kg**-1

10

4

3

168

168



O3D.

Will use practical salinity.

1.3.3. Sea-ice/snow/soil

Time resolution: Hourly
5 model levels: (1, ..., 5)

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

228141

Snow depth water equivalent

sd

kg m**-2

0

1

60

114








GG. Depth of snow with conversion to water. WMO unit.

1.4. 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

2. Mean encodings

2.1. Fields on a single level or surface

2.1.1. Atmosphere

Not in output for now.

Time resolution: 1 x hourly, 1 x monthly

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

235031Mean snowfall ratemsrkg m**-2 s**-101531




0
GG. WMO unit.
235033Mean surface sensible heat fluxmsshfW m**-200111




0
GG.
235034Mean surface latent heat fluxmslhfW m**-200101




0
GG.
235035Mean surface downward short-wave radiation fluxmsdwswrfW m**-20471




0
GG.
235036Mean surface downward long-wave radiation fluxmsdwlwrfW m**-20531




0
GG.
235037Mean surface net short-wave radiation fluxmsnswrfW m**-20491




0
GG.
235038Mean surface net long-wave radiation fluxmsnlwrfW m**-20551




0
GG.
235039Mean top net short-wave radiation fluxmtnswrfW m**-20498




0
GG.
235040Mean top net long-wave radiation fluxmtnlwrfW m**-20558




0
GG.
235043Mean evaporation ratemerkg m**-2 s**-101791




0
GG. WMO unit.
235053Mean top downward short-wave radiation fluxmtdwswrfW m**-20478




0
GG.
235055Mean total precipitation ratemtprkg m**-2 s**-101521




0
GG. WMO unit.
228004Mean 2 metre temperaturemean2tK00010302


0
GG.

2.1.2. Sea ice

Time resolution: 1 x daily, 1 x monthly

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

263000

Time-mean sea ice thickness

avg_sithick

m

10

2

1

174

missingmissing176missingmissing

0


O2D

263001

Time-mean sea ice area fraction

avg_siconc

Fraction

10

2

0

174

missingmissing176missingmissing

0


O2D

263003

Time-mean eastward sea ice velocity

avg_siue

m s**-1

10

2

4

174

missingmissing176missingmissing

0


O2D

263004

Time-mean northward sea ice velocity

avg_sivn

m s**-1

10

2

5

174

missingmissing176missingmissing

0


O2D

263008

Time-mean sea ice volume per unit area

avg_sivol

m**3 m**-2

10

2

15

174

missingmissing176missingmissing

0


O2D

263009

Time-mean snow volume over sea ice per unit area

avg_snvol

m**3 m**-2

10

2

16

173

missingmissing175missingmissing

0


O2D

263021

Time-mean X-component of sea ice velocity

avg_six

m s**-1

10

2

24

174

missingmissing176missingmissing

0


O2D

263022

Time-mean Y-component of sea ice velocity

avg_siy

m s**-1

10

2

25

174

missingmissing176missingmissing

0


O2D

2.1.3. Ocean

Time resolution: 1 x daily, 1 x monthly

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

263100

Time-mean sea surface practical salinity

avg_sos

g kg**-1

10

3

3

16000missingmissingmissing

0


O2D

263101

Time-mean sea surface temperature

avg_tos

K

10

3

0

16000missingmissingmissing

0


O2D

263121

Time-mean vertically-integrated heat content in the upper 300 m

avg_hc300m

J m**-2

10

4

22

160001600300

0


O2D

263122

Time-mean vertically-integrated heat content in the upper 700 m

avg_hc700m

J m**-2

10

4

22

160001600700

0


O2D

263124

Time-mean sea surface height

avg_zos

m

10

3

1

16000missingmissingmissing

0


O2D

263145

Time-mean sea surface salinity

avg_sss

kg kg**-1

10

3

21

16000missingmissingmissing

0


O2D.

Will use practical salinity.

XXX

Vertically integrated meridional volume transport

XXX

m**3 m**-1 s**-1

10

4

44







0


O2D. Awaiting input from ClimateDT.

2.2. Fields on model levels

2.2.1. Ocean

Time resolution: 1 x daily, 1 x monthly

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

263500

Time-mean sea water practical salinity

avg_so

g kg**-1

10

4

21

168

168

0


O3D

263501

Time-mean sea water potential temperature

avg_thetao

K

10

4

18

168

168

0


O3D

263505

Time-mean northward sea water velocity

avg_von

m s**-1

10

4

24

168

168

0


O3D

263506

Time-mean eastward sea water velocity

avg_uoe

m s**-1

10

4

23

168

168

0


O3D

263507

Time-mean upward sea water velocity

avg_wo

m s**-1

10

4

27

168

168

0


O3D

263516

Time-mean sea water salinity

salo

kg kg**-1

10

4

3

168

168



O3D.
Will use practical salinity.

3. Accumulated encodings

3.1. Fields on a single level or surface

3.1.1. Atmosphere

Time resolution: Hourly accumulation

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

8

Surface runoff

sro

m

2

0

202

1






1

1

GG.
ECMWF unit.

9

Sub-surface runoff

ssro

m

2

0

204

1






1

1

GG.
ECMWF unit.

144

Snowfall

sf

m of water equivalent

0

1

198

1






1

1

GG.
ECMWF unit.

146

Surface sensible heat flux

sshf

J m**-2

0

0

11

1






1


GG

147

Surface latent heat flux

slhf

J m**-2

0

0

10

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

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

182

Evaporation

e

m of water equivalent

0

1

199

1






1

1

GG.
ECMWF unit.

212

TOA incident short-wave (solar) radiation

tisr

J m**-2

0

4

7

8






1


GG

228

Total precipitation

tp

m

0

1

193

1



255



1

1

GG.
ECMWF unit.

228144

Snowfall water equivalent

sf

kg m**-2

0

1

53

1






1


GG.
WMO unit.
Not yet supported by ClimateDT IFS.

228228

Total Precipitation

tp

kg m**-2

0

1

52

1






1


GG.
WMO unit.
Not yet supported by ClimateDT IFS.

231010

Surface runoff

surfro

kg m**-2

2

0

51

1






1


GG.
WMO unit.
Not yet supported by ClimateDT IFS.

231012

Sub-surface runoff

ssurfro

kg m**-2

2

0

52

1






1


GG.
WMO unit.
Not yet supported by ClimateDT IFS.

260259

Evaporation

eva

kg m**-2

0

1

79

1






1


GG.
WMO unit.
Not yet supported by ClimateDT IFS.

4. Maximum encodings

There are no maximum encodings for this dataset.

5. Minimum encodings

There are no minimum encodings for this dataset.

6. Conversions

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

Inst paramId

Mean paramId

Accum paramId

260049

235031

228144

231

235033

146

X

235034

147

X

235035

169

X

235036

175

X

235037

176

X

235038

177

X

235039

178

X

235040

179

232

235043

260259

X

235053

212

260048

235055

228228

167

228004

X

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