Parameters forming part of the Extremes Digital Twin (DT) are investigated here.

See the Extremes DT data catalogue page for more details on data availability and accessing the data.

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

Contents:

Instantaneous encodings

Fields on a single level or surface

Atmosphere (levtype sfc)

Time resolution: Hourly (step=0/1/2/.../96).

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

type Of Statistical Processing

local Tables Version

comments

31

Sea ice area fraction

ci

(0 - 1)

10

2

0

surface

-



GG

34

Sea surface temperature

sst

K

10

3

0

surface-



GG

78

Total column cloud liquid water

tclw

kg m**-2

0

1

69

entireAtmosphere

-



GG

134

Surface pressure

sp

Pa

0

3

0

surface

-



GG

136

Total column water

tcw

kg m**-2

0

1

51

entireAtmosphere

-



GG

137

Total column vertically-integrated water vapour

tcwv

kg m**-2

0

1

64

entireAtmosphere

-



GG

151

Mean sea level pressure

msl

Pa

0

3

0

meanSea

-



GG

165

10 metre U wind component

10u

m s**-1

0

2

2

heightAboveGround

10



GG

166

10 metre V wind component

10v

m s**-1

0

2

3

heightAboveGround

10



GG

167

2 metre temperature

2t

K

0

0

0

heightAboveGround

2



GG

168

2 metre dewpoint temperature

2d

K

0

0

6

heightAboveGround

2



GG

235

Skin temperature

skt

K

0

0

17

surface

-



GG

3020

Visibility

vis

m

0

19

0

heightAboveGround

10



GG

228029

Instantaneous 10 metre wind gust

i10fg

m s**-1

0

2

22

heightAboveGround

10



GG

228050

Instantaneous total lightning flash density

litoti

km**-2 day**-1

0

17

4

entireAtmosphere

-



GG.

228218

Convective rain rate

crr

kg m**-2 s**-1

0

1

76

surface

-



GG

228219

Large scale rain rate

lsrr

kg m**-2 s**-1

0

1

77

surface

-



GG

228221

Large scale snowfall rate water equivalent

lssfr

kg m**-2 s**-1

0

1

56

surface

-



GG.

228235

Most-unstable CAPE

mucape

J kg**-1

0

7

6

mostUnstableParcel

-



GG.
Used rather than 59; cape, which is phased out.

260015

Precipitation type

ptype

code table (4.201)

0

1

19

surface

-



GG

Wave (levtype sfc)

Time resolution: Hourly (step=0/1/2/.../96).

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

type Of Statistical Processing

local Tables Version

comments

140221

Mean zero-crossing wave period

mp2

s

10

0

28

surface

-



GG

140229

Significant height of combined wind waves and swell

swh

m

10

0

3

surface

-



GG

140230

Mean wave direction

mwd

degrees

10

0

14

surface

-



GG

140231

Peak wave period

pp1d

s

10

0

34

surface

-



GG

140232

Mean wave period

mwp

s

10

0

15

surface

-



GG

Fields on pressure levels (levtype pl)

Time resolution: Hourly (step=0/1/2/.../96).

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 Level

level

type Of Statistical Processing

local Tables Version

comments

129Geopotentialzm**2 s**-2034isobaricInhPa<as-above>

GG. At surface this is orography.

130

Temperature

t

K

0

0

0

isobaricInhPa

<as-above>



GG

131

U component of wind

u

m s**-1

0

2

2

isobaricInhPa

<as-above>



GG

132

V component of wind

v

m s**-1

0

2

3

isobaricInhPa

<as-above>



GG

133

Specific humidity

q

kg kg**-1

0

1

0

isobaricInhPa

<as-above>



GG

157

Relative humidity

r

%

0

1

1

isobaricInhPa

<as-above>



GG

Fields on height levels (levtype hl)

Time resolution: Hourly (step=0/1/2/.../96).

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 Level

level

type Of Statistical Processing

local Tables Version

comments

228246

100 metre U wind component

100u

m s**-1

0

2

2

heightAboveGround

100



GG

228247

100 metre V wind component

100v

m s**-1

0

2

3

heightAboveGround

100



GG

Mean encodings

Fields on a single level or surface

Atmosphere (levtype sfc)

Time resolution: 6 hourly means (step=0-6/6-12/.../90-96).

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

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

entireAtmosphere

-

0


GG

Accumulated encodings

Fields on a single level or surface

Atmosphere (levtype sfc)

Time resolution: Hourly accumulations since the start of the forecast (step=0-1/1-2/2-3/.../95-96).

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

type Of Statistical Processing

local Tables Version

comments

142

Large-scale precipitation

lsp

m

0

1

196

surface

-

1

1

GG.
ECMWF unit.

144

Snowfall

sf

m of water equivalent

0

1

198

surface

-

1

1

GG.
ECMWF unit.

169

Surface short-wave (solar) radiation downwards

ssrd

J m**-2

0

4

7

surface

-

1


GG

175

Surface long-wave (thermal) radiation downwards

strd

J m**-2

0

5

3

surface

-

1


GG

176

Surface net short-wave (solar) radiation

ssr

J m**-2

0

4

9

surface

-

1


GG

177

Surface net long-wave (thermal) radiation

str

J m**-2

0

5

5

surface

-

1


GG

178

Top net short-wave (solar) radiation

tsr

J m**-2

0

4

9

nominalTop

-

1


GG

179

Top net long-wave (thermal) radiation

ttr

J m**-2

0

5

5

nominalTop

-

1


GG

180

Time-integrated eastward turbulent surface stress

ewss

N m**-2 s

0

2

62

surface

-

1


GG.

181

Time-integrated northward turbulent surface stress

nsss

N m**-2 s

0

2

63

surface

-

1


GG.

205

Runoff

ro

m

2

0

201

surface

-

1

1

GG.
ECMWF unit.

228

Total precipitation

tp

m

0

1

193

surface

-

1

1

GG.
ECMWF unit.

228216

Accumulated freezing rain

fzra

m

0

1

194

surface

-

1

1

GG.
ECMWF unit.