This is a first draft portfolio provided ahead of the release of Phase 2 data - which is expected for Q2 2026 - and so is subject to change.

An equivalent catalogue page to Climate DT Phase 1 data catalogue will be provided as the data is released.

Parameters forming part of the Climate Change Adaptation Digital Twin (DT) for Phase 2, stream clmn are detailed here.

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 and no change from encoding in Phase 1
Parameter ready but changes for encoding in Phase 2

Contents:

1. Mean encodings

1.1. Fields on a single level or surface

1.1.1. Atmosphere (levtype sfc)

Time resolution: Monthly (year=YYYY,month=1/to/12)

BELOW ARE FROM CORRESPONDING INSTANT PARAMETERS IN CLTE STREAM

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

type Of Statistical Processing

comments inc. instant to time-mean paramId mapping

235087

Time-mean total column liquid water

avg_tclw

kg m**-2

0

1

69

entireAtmosphere

-

0

78 → 235087

235088

Time-mean total column cloud ice water

avg_tciw

kg m**-2

0

1

70

entireAtmosphere

-

0

79 → 235088 

235130

Time-mean temperature

avg_t

K

0

0

0

surface

-

0

Removed in Phase 2 from ICON.

235134

Time-mean surface pressure

avg_sp

Pa

0

3

0

surface

-

0

134 → 235134

235136

Time-mean total column water

avg_tcw

kg m**-2

0

1

51

entireAtmosphere

-

0

New in Phase 2.

136 → 235136

235137

Time-mean total column vertically-integrated water vapour

avg_tcwv

kg m**-2

0

1

64

entireAtmosphere

-

0

137 → 235137

235078

Time-mean snow depth water equivalent

avg_sd

kg m**-2

0

1

60

surface

-

0

228141 → 235078

IFS-only in Phase 1.

Both models in Phase 2.

148

Charnock

chnk

Numeric

10

0

76

surface

-

-

Removed in Phase 2.

235151

Time-mean mean sea level pressure

avg_msl

Pa

0

3

0

meanSea

-

0

151 → 235151 

235159

Time-mean boundary layer height

avg_blh

m

0

3

18

surface

-

0

Removed in Phase 2.

235288

Time-mean total cloud cover

avg_tcc

%

0

6

1

entireAtmosphere

-

0

228164 → 235288

235165

Time-mean 10 metre U wind component

avg_10u

m s**-1

0

2

2

heightAboveGround

10

0

165 → 235165

235166

Time-mean 10 metre V wind component

avg_10v

m s**-1

0

2

3

heightAboveGround

10

0

166 → 235166

228004

Time-mean 2 metre temperature

avg_2t

K

0

0

0

heightAboveGround

2

0

167 → 228004

235168

Time-mean 2 metre dewpoint temperature

avg_2d

K

0

0

6

heightAboveGround

2

0

168 → 235168

186

Low cloud cover

lcc

(0 - 1)

0

6

193

lowCloudLayer

-

-

Removed in Phase 2.

187

Medium cloud cover

mcc

(0 - 1)

0

6

194

mediumCloudLayer

-

-

Removed in Phase 2.

188

High cloud cover

hcc

(0 - 1)

0

6

195

highCloudLayer

-

-

Removed in Phase 2.

228005

Time-mean of 10 metre wind speed

avg_10ws

m s**-1

0

2

1

heightAboveGround

10

0

New in Phase 2.

207 → 228005

235079

Time-mean skin temperature

avg_skt

K

0

0

17

surface

-

0

235 → 235079

Unified to skt in both ICON and IFS.

260048

Total precipitation rate

tprate

kg m**-2 s**-1

0

1

52

surface

-

-

Removed in Phase 2.

BELOW ARE FROM CORRESPONDING HOURLY-MEAN PARAMETERS IN CLTE STREAM

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

type Of Statistical Processing

comments inc. instant to time-mean paramId mapping

235020

Time-mean surface runoff rateavg_surfrorkg m**-2 s**-1

2

0

51

surface

-

0

IFS-only in Phase 1.

Both models in Phase 2.

235021

Time-mean sub-surface runoff rateavg_ssurfror

kg m**-2 s**-1

2

0

52

surface

-

0

IFS-only in Phase 1.

Both models in Phase 2.

235031

Time-mean total snowfall rate water equivalentavg_tsrwe

kg m**-2 s**-1

0

1

53

surface

-

0

IFS-only in Phase 1.

Both models in Phase 2.

235033

Time-mean surface sensible heat fluxavg_ishf

W m**-2

0

0

11

surface

-

0

New in Phase 2.

235034

Time-mean surface latent heat fluxavg_slhtf

W m**-2

0

0

10

surface

-

0

New in Phase 2.

235035

Time-mean surface downward short-wave radiation fluxavg_sdswrf

W m**-2

0

4

7

surface

-

0

New in Phase 2.

235036

Time-mean surface downward long-wave radiation fluxavg_sdlwrf

W m**-2

0

5

3

surface

-

0

New in Phase 2.

235037

Time-mean surface net short-wave radiation fluxavg_snswrf

W m**-2

0

4

9

surface

-

0

New in Phase 2.

235038

Time-mean surface net long-wave radiation fluxavg_snlwrf

W m**-2

0

5

5

surface

-

0

New in Phase 2.

235039

Time-mean top net short-wave radiation fluxavg_tnswrf

W m**-2

0

4

9

nominalTop

-

0

New in Phase 2.

235040

Time-mean top net long-wave radiation fluxavg_tnlwrf

W m**-2

0

5

5

nominalTop

-

0

New in Phase 2.

235041

Time-mean eastward turbulent surface stressavg_iews

N m**-2

0

2

62

surface

-

0

New in Phase 2.

235042

Time-mean northward turbulent surface stressavg_inss

N m**-2

0

2

63

surface

-

0

New in Phase 2.

235043

Time-mean moisture fluxavg_ie

kg m**-2 s**-1

0

1

79

surface

-

0

IFS-only in Phase 1.

Both models in Phase 2.

235049

Time-mean top net short-wave radiation flux, clear skyavg_tnswrfcs

W m**-2

0

4

11

nominalTop

-

0

New in Phase 2.

235050

Time-mean top net long-wave radiation flux, clear skyavg_tnlwrcs

W m**-2

0

5

6

nominalTop

-

0

New in Phase 2.

235051

Time-mean surface net short-wave radiation flux, clear skyavg_snswrfcs

W m**-2

0

4

11

surface

-

0

New in Phase 2.

235052

Time-mean surface net long-wave radiation flux, clear skyavg_snlwrcs

W m**-2

0

5

6

surface

-

0

New in Phase 2.

235053

Time-mean top downward short-wave radiation fluxavg_tdswrf

W m**-2

0

4

7

nominalTop

-

0

New in Phase 2.

235055

Time-mean total precipitation rateavg_tprate

kg m**-2 s**-1

0

1

52

surface

-

0

IFS-only in Phase 1.

Both models in Phase 2.

260654

Time-integrated eastward turbulent surface stress due to surface roughness

etsssr

N m**-2

0

2

66

surface

-

0

Removed in Phase 2 - Previously ICON only and they will now output total stress equivalent (235041)

260655

Time-integrated northward turbulent surface stress due to surface roughness

ntsssr

N m**-2

0

2

67

surface

-

0

Removed in Phase 2 - Previously ICON only and they will now output total stress equivalent (235042)

1.1.2. Snow (levtype sol)

Time resolution: Monthly (year=YYYY,month=1/to/12)
5 model levels: (1, ..., 5)

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

type Of Statistical Processing

comments inc. instant to time-mean paramId mapping

235078

Time-mean snow depth water equivalent

avg_sd

kg m**-2

0

1

60

snow

<as-above>

0

228141 → 235078

Remains IFS-only in Phase 2.

1.1.3. Soil (levtype sol)

Time resolution: Monthly (year=YYYY,month=1/to/12)
IFS: 4 model levels: (1, ..., 4) (depths 0.07 m, 0.21 m, 0.72 m, 1.89 m)

ICON: 5 model levels: (1, ..., 5) (depths 0.065 m, 0.319 m, 1.232 m, 4.134 m, 9.834 m)

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

type Of Statistical Processing

comments inc. instant to time-mean paramId mapping

235077

Time-mean volumetric soil moisture

avg_vsw

m**3 m**-3

2

0

25

soilLayer

<as-above>

0

New in Phase 2.

1.1.4. Sea ice (levtype o2d)

Time resolution: Monthly (year=YYYY,month=1/to/12)

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

type Of Statistical Processing

comments inc. instant to time-mean paramId mapping

263000

Time-mean sea ice thickness

avg_sithick

m

10

2

1

iceLayerOnWater

-

0


263001

Time-mean sea ice area fraction

avg_siconc

Fraction

10

2

0

iceLayerOnWater

-

0


263003

Time-mean eastward sea ice velocity

avg_siue

m s**-1

10

2

4

iceLayerOnWater

-

0


263004

Time-mean northward sea ice velocity

avg_sivn

m s**-1

10

2

5

iceLayerOnWater

-

0


263008

Time-mean sea ice volume per unit area

avg_sivol

m**3 m**-2

10

2

15

iceLayerOnWater

-

0

NEMO only in Phase 1.

All models in Phase 2.

263009

Time-mean snow volume over sea ice per unit area

avg_snvol

m**3 m**-2

10

2

16

snowLayerOverIceOnWater

-

0

NEMO & ICON only in Phase 1.

All models in Phase 2.

263021

Time-mean X-component of sea ice velocity

avg_six

m s**-1

10

2

24

iceLayerOnWater

-

0

Removed in Phase 2.

263022

Time-mean Y-component of sea ice velocity

avg_siy

m s**-1

10

2

25

iceLayerOnWater

-

0

Removed in Phase 2.

1.1.5. Ocean (levtype o2d)

Time resolution: Monthly (year=YYYY,month=1/to/12)

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

type Of Statistical Processing

comments inc. instant to time-mean paramId mapping

263100

Time-mean sea surface practical salinity

avg_sos

g kg**-1

10

3

3

oceanSurface-

0

NEMO & FESOM only in Phase 1.

All models in Phase 2.

263101

Time-mean sea surface temperature

avg_tos

K

10

3

0

oceanSurface-

0

NEMO & FESOM only in Phase 1.

All models in Phase 2.

263114

Time-mean ocean mixed layer depth defined by sigma theta 0.03 kg m-3

avg_mlotst030

m

10

4

14

mixedLayerDepthByDensity0.03

0

ICON only. NEMO? FESOM?

All models in Phase 2.

263121

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

avg_hc300m

J m**-2

10

4

22

depthBelowSeaLayer300

0

NEMO only in Phase 1.

All models in Phase 2.

263122

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

avg_hc700m

J m**-2

10

4

22

depthBelowSeaLayer700

0

NEMO only in Phase 1.

All models in Phase 2.

263123

Time-mean total column heat content

avg_hcbtm

J m**-2

10

4

22

oceanSurfaceToBottom-

0

New for Phase 2.

263124

Time-mean sea surface height

avg_zos

m

10

3

1

oceanSurface-

0


1.2. Fields on pressure levels (levtype pl)

Time resolution: Monthly (year=YYYY,month=1/to/12)

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 Level

level

type Of Statistical Processing

comments inc. instant to time-mean paramId mapping

235100

Time-mean potential vorticity

avg_pv

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

0

2

14

isobaricInhPa

<as-above>

0

60 → 235100

IFS-only in Phase 1.

Both models in Phase 2.

235129

Time-mean geopotential

avg_z

m**2 s**-2

0

3

4

isobaricInhPa

<as-above>

0

129 → 235129 

235130

Time-mean temperature

avg_t

K

0

0

0

isobaricInhPa

<as-above>

0

130 → 235130 

235131

Time-mean U component of wind

avg_u

m s**-1

0

2

2

isobaricInhPa

<as-above>

0

131 → 235131 

235132

Time-mean V component of wind

avg_v

m s**-1

0

2

3

isobaricInhPa

<as-above>

0

132 → 235132 

235133

Time-mean specific humidity

avg_q

kg kg**-1

0

1

0

isobaricInhPa

<as-above>

0

133 → 235133 

235135

Time-mean vertical velocity

avg_w

Pa s**-1

0

2

8

isobaricInhPa

<as-above>

0

135 → 235135 

235157

Time-mean relative humidity

avg_r

%

0

1

1

isobaricInhPa

<as-above>

0

157 → 235157 

235246

Time-mean specific cloud liquid water content

avg_clwc

kg kg**-1

0

1

83

isobaricInhPa

<as-above>

0

246 → 235246

1.3. Fields on model levels

1.3.1. Ocean (levtype o3d)

Time resolution: Monthly (year=YYYY,month=1/to/12)
ICON: 72 model levels (1, ..., 72)
NEMO: 75 model levels: (1, ..., 75)
FESOM: 69 model levels: (1, ..., 69)

param Id

name

short Name

units

discipline

parameter Category

parameter Number

type Of Level

level

type Of Statistical Processing

comments inc. instant to time-mean paramId mapping

263500

Time-mean sea water practical salinity

avg_so

g kg**-1

10

4

21

oceanModelLayer<as-above>

0


263501

Time-mean sea water potential temperature

avg_thetao

K

10

4

18

oceanModelLayer<as-above>

0


263505

Time-mean northward sea water velocity

avg_von

m s**-1

10

4

24

oceanModelLayer<as-above>

0


263506

Time-mean eastward sea water velocity

avg_uoe

m s**-1

10

4

23

oceanModelLayer<as-above>

0


263507

Time-mean upward sea water velocity

avg_wo

m s**-1

10

4

27

oceanModel<as-above>

0


1.4. Fields on height levels (levtype hl)

Time resolution: Monthly (year=YYYY,month=1/to/12)

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

Phase 1 to Phase 2 comments

235131

Time-mean U component of wind

avg_u

m s**-1

0

2

2

heightAboveGround

100

0

131 → 235131

IFS-only in Phase 1.

Remains IFS-only in Phase 2.

235132

Time-mean V component of wind

avg_v

m s**-1

0

2

3

heightAboveGround

100

0

132 → 235132

IFS-only in Phase 1.

Remains IFS-only in Phase 2.