Parameters forming part of the Weather and Geophysical Extremes Digital Twin (DT) are investigated here. See the encodings below, which are current for ecCodes 2.33.0.

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

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

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...

1.1.2. Wave

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

140221

Mean zero-crossing wave period

mp2

s

10

0

28









GG

140229

Significant height of combined wind waves and swell

swh

m

10

0

3

101








GG

140230

Mean wave direction

mwd

degrees

10

0

14









GG

140231

Peak wave period

pp1d

s

10

0

34









GG

140232

Mean wave period

mwp

s

10

0

15









GG

1.1.3. 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

1.2. 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

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

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

138

Vorticity (relative)

vo

s**-1

0

2

12

100








SH

155

Divergence

d

s**-1

0

2

13

100








SH

156

Geopotential height

gh

gpm

0

3

5

100








GG

157

Relative humidity

r

%

0

1

1

100








GG

1.3. Fields on model levels

1.3.1. Atmosphere

Time resolution: Hourly.

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

75Specific rain water contentcrwckg kg**-10185

105








GG. Not in official portfolio.

76Specific snow water contentcswckg kg**-10186

105








GG. Not in official portfolio.

77Eta-coordinate vertical velocityetadots**-10232

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.

133Specific humidityqkg kg**-1010

105








GG. Not in official portfolio.

135Vertical velocitywPa s**-1028

105








GG. Also called omega. Not in official portfolio.

246Specific cloud liquid water contentclwckg kg**-10183

105








GG. Not in official portfolio.

247Specific cloud ice water contentciwckg kg**-10184

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

1.3.2. 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

1510N-11510N



GG.
For soil layer N.
Replaces:
139; stl1
170; stl2
183; stl3
236; stl4

260199

Volumetric soil moisture

vsw

m**3 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

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

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

3. Accumulated encodings

3.1. Fields on a single level or surface

3.1.1. 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

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

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.

4. Maximum encodings

4.1. Fields on a single level or surface

4.1.1. 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

m s**-1

0

2

22

103

0

10




2


GG

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

...

...

...

2 Comments

  1. Anonymous

    Great Information

  2. DEA DEA

    Thanks for uploading the information.


    However, I wonder whether retrieving O8000 data using the polytope client instance currently hosted on the ECMWF infrastructure is still possible, as indicated here: SUMMIT 1.4 km NDJF seasonal run dataset: Example Polytope requests.


    I tried to perform the following request using the email and api-key associated with my ECMWF account (as described in the Section 4 of DE-DTE-2-22.D4)


    from polytope.api import Client
    import time

    c = Client(user_email='xxx', user_key='xxx')

    output_name = 'o8000_p_133.grib'


    request = {
      'class' : 'rd',
      'date' : '2018-11-01',
      'expver' : 'hs3g',
      'levelist': '150/200/250/300/400/500/700/850/925/1000',
      'levtype': 'pl',
      'param' : '133',
      'step' : '0/12/24',
      'stream' : 'oper',
      'time' : '00:00:00',
      'type' : 'fc'
    }

    c.retrieve('ecmwf-mars', request, output_name)


    I need to retrieve a multi-level DestinE data in O8000 projection.


    Thanks in advance for the help.

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