These are first draft portfolios provided ahead of the release of Phase 2 data - which is expected for Q1 2026 - and so are 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 clte are detailed here.

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:

Instantaneous encodings

Fields on a single level or surface

Atmosphere (levtype `sfc`)

Time resolution: Hourly (time=0000/0100/...)

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of Level	level	Phase 1 to Phase 2 comments
78	Total column cloud liquid water	tclw	kg m**-2	0	1	69	entireAtmosphere	-
79	Total column cloud ice water	tciw	kg m**-2	0	1	70	entireAtmosphere	-
~~130~~	~~Temperature~~	t	K	0	0	0	~~surface~~	-	Removed in Phase 2 from ICON.
134	Surface pressure	sp	Pa	0	3	0	surface	-
136	Total column water	tcw	kg m**-2	0	1	51	entireAtmosphere	-	New in Phase 2
137	Total column vertically-integrated water vapour	tcwv	kg m**-2	0	1	64	entireAtmosphere	-
228141	Snow depth water equivalent	sd	kg m**-2	0	1	60	surface	-	141 → 228141 m of water equivalent → kg m**-2 IFS-only in Phase 1. Both models in Phase 2.
~~148~~	~~Charnock~~	~~chnk~~	~~Numeric~~	10	0	76	~~surface~~	-	Removed in Phase 2
151	Mean sea level pressure	msl	Pa	0	3	0	meanSea	-
~~159~~	~~Boundary layer height~~	~~blh~~	m	0	3	18	~~surface~~	-	Removed in Phase 2.
228164	Total cloud cover	tcc	%	0	6	1	entireAtmosphere	-	164 → 228164 (0-1) → % Both models in Phase 2.
165	10 metre U wind component	10u	m s**-1	0	2	2	heightAboveGround	10
166	10 metre V wind component	10v	m s**-1	0	2	3	heightAboveGround	10
167	2 metre temperature	2t	K	0	0	0	heightAboveGround	2
168	2 metre dewpoint temperature	2d	K	0	0	6	heightAboveGround	2
~~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
207	10 metre wind speed	10si	m s**-1	0	2	1	heightAboveGround	10	New in Phase 2
235	Skin temperature	skt	K	0	0	17	surface	-	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

Time resolution: Daily (date=YYYYMMDD at start of run, time=0000)

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

228002

Orography

orog

m

0

3

5

surface

-

129 → 228002
m**2 s**-2 → m
IFS only in Phase 1

Both models in Phase 2.

172

Land-sea mask

lsm

(0 - 1)

2

0

surface

-

IFS only in Phase 1.

Both models in Phase 2.

Fields on pressure levels (levtype `pl`)

Time resolution: Hourly (time=0000/0100/...)

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	parameter Category	parameter Number	type Of Level	level	Phase 1 to Phase 2 comments
60	Potential vorticity	pv	K m2 kg-1 s**-1	2	14	isobaricInhPa	<as-above>	IFS-only in Phase 1. Both models in Phase 2.
129	Geopotential	z	m2 s-2	3	4	isobaricInhPa	<as-above>
130	Temperature	t	K	0	0	isobaricInhPa	<as-above>
131	U component of wind	u	m s**-1	2	2	isobaricInhPa	<as-above>
132	V component of wind	v	m s**-1	2	3	isobaricInhPa	<as-above>
133	Specific humidity	q	kg kg**-1	1	0	isobaricInhPa	<as-above>
135	Vertical velocity	w	Pa s**-1	2	8	isobaricInhPa	<as-above>
157	Relative humidity	r	%	1	1	isobaricInhPa	<as-above>
246	Specific cloud liquid water content	clwc	kg kg**-1	1	83	isobaricInhPa	<as-above>

Fields on model levels

Snow (levtype `sol`)

Time resolution: Hourly (time=0000/0100/...)
5 model levels: (1, ..., 5)

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
228141	Snow depth water equivalent	sd	kg m**-2	0	1	60	snow	<as-above>		Remains IFS-only in Phase 2.

Soil (levtype `sol`)

Time resolution: Hourly (time=0000/0100/...)
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	Phase 1 to Phase 2 comments
260199	Volumetric soil moisture	vsw	m3 m-3	2	0	25	soilLayer	<as-above>		New in Phase 2.

Fields on height levels (levtype `hl`)

Time resolution: Hourly (time=0000/0100/...)

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	Phase 1 to Phase 2 comments
131	U component of wind	u	m s**-1	0	2	2	heightAboveGround	100		228246 → 131 Remains IFS-only in Phase 2.
132	V component of wind	v	m s**-1	0	2	3	heightAboveGround	100		228247 → 132 Remains IFS-only in Phase 2.

Mean encodings

Fields on a single level or surface

Atmosphere (levtype `sfc`)

Time resolution: Hourly (time=0000/0100/...)

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of Level	level	comments
235020	Time-mean surface runoff rate	avg_surfror	kg m-2 s-1	2	0	51	surface	-	IFS-only in Phase 1. Both models in Phase 2. 8 → 235020 m → kg m-2 s-1 This is mean flux.
235021	Time-mean sub-surface runoff rate	avg_ssurfror	kg m-2 s-1	2	0	52	surface	-	IFS-only in Phase 1. Both models in Phase 2. 9 → 235021 m → kg m-2 s-1 This is mean flux.
235031	Time-mean total snowfall rate water equivalent	avg_tsrwe	kg m-2 s-1	0	1	53	surface	-	IFS-only in Phase 1. Both models in Phase 2. 144 → 235031 m of water equivalent → kg m-2 s-1 This is mean flux.
235033	Time-mean surface sensible heat flux	avg_ishf	W m**-2	0	0	11	surface	-	New in Phase 2.
235034	Time-mean surface latent heat flux	avg_slhtf	W m**-2	0	0	10	surface	-	New in Phase 2.
235035	Time-mean surface downward short-wave radiation flux	avg_sdswrf	W m**-2	0	4	7	surface	-	New in Phase 2.
235036	Time-mean surface downward long-wave radiation flux	avg_sdlwrf	W m**-2	0	5	3	surface	-	New in Phase 2.
235037	Time-mean surface net short-wave radiation flux	avg_snswrf	W m**-2	0	4	9	surface	-	New in Phase 2.
235038	Time-mean surface net long-wave radiation flux	avg_snlwrf	W m**-2	0	5	5	surface	-	New in Phase 2.
235039	Time-mean top net short-wave radiation flux	avg_tnswrf	W m**-2	0	4	9	nominalTop	-	New in Phase 2.
235040	Time-mean top net long-wave radiation flux	avg_tnlwrf	W m**-2	0	5	5	nominalTop	-	New in Phase 2.
235041	Time-mean eastward turbulent surface stress	avg_iews	N m**-2	0	2	62	surface	-	IFS: 180 → 235041 ICON: 260654 → 235041 (Use total stress)
235042	Time-mean northward turbulent surface stress	avg_inss	N m**-2	0	2	63	surface	-	IFS: 181 → 235042 ICON: 260655 → 235042 (Use total stress)
235043	Time-mean moisture flux	avg_ie	kg m-2 s-1	0	1	79	surface	-	IFS-only in Phase 1. Both models in Phase 2. 182 → 235043 m of water equivalent → kg m-2 s-1 This is mean flux.
235049	Time-mean top net short-wave radiation flux, clear sky	avg_tnswrfcs	W m**-2	0	4	11	nominalTop	-	New in Phase 2.
235050	Time-mean top net long-wave radiation flux, clear sky	avg_tnlwrcs	W m**-2	0	5	6	nominalTop	-	New in Phase 2.
235051	Time-mean surface net short-wave radiation flux, clear sky	avg_snswrfcs	W m**-2	0	4	11	surface	-	New in Phase 2.
235052	Time-mean surface net long-wave radiation flux, clear sky	avg_snlwrcs	W m**-2	0	5	6	surface	-	New in Phase 2.
235053	Time-mean top downward short-wave radiation flux	avg_tdswrf	W m**-2	0	4	7	nominalTop	-	New in Phase 2.
235055	Time-mean total precipitation rate	avg_tprate	kg m-2 s-1	0	1	52	surface	-	IFS-only in Phase 1. Both models in Phase 2. 228 → 235055 m → kg m-2 s-1 This is mean flux.
~~260654~~	~~Time-integrated eastward turbulent surface stress due to surface roughness~~	~~etsssr~~	~~N m**-2~~	0	2	66	~~surface~~	-	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~~	-	Removed in Phase 2 - Previously ICON only and they will now output total stress equivalent (235042)

Sea ice (levtype `o2d`)

Time resolution: 1 x daily (date=YYYYMMDD,time=0000)

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of Level	level	Phase 1 to Phase 2 comments
263000	Time-mean sea ice thickness	avg_sithick	m	10	2	1	iceLayerOnWater	-
263001	Time-mean sea ice area fraction	avg_siconc	Fraction	10	2	0	iceLayerOnWater	-
263003	Time-mean eastward sea ice velocity	avg_siue	m s**-1	10	2	4	iceLayerOnWater	-
263004	Time-mean northward sea ice velocity	avg_sivn	m s**-1	10	2	5	iceLayerOnWater	-
263008	Time-mean sea ice volume per unit area	avg_sivol	m3 m-2	10	2	15	iceLayerOnWater	-	NEMO only in Phase 1. All models in Phase 2.
263009	Time-mean snow volume over sea ice per unit area	avg_snvol	m3 m-2	10	2	16	snowLayerOverIceOnWater	-	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~~	-	Removed in Phase 2
~~263022~~	~~Time-mean Y-component of sea ice velocity~~	~~avg_siy~~	~~m s**-1~~	10	2	25	~~iceLayerOnWater~~	-	Removed in Phase 2

Ocean (levtype `o2d`)

Time resolution: 1 x daily (date=YYYYMMDD,time=0000)

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of Level	level	Phase 1 to Phase 2 comments
263100	Time-mean sea surface practical salinity	avg_sos	g kg**-1	10	3	3	oceanSurface	-	NEMO & FESOM only in Phase 1. All models in Phase 2.
263101	Time-mean sea surface temperature	avg_tos	K	10	3	0	oceanSurface	-	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	~~mixedLayerDepthByDensity~~	~~0.03~~	Removed in Phase 2.
263121	Time-mean vertically-integrated heat content in the upper 300 m	avg_hc300m	J m**-2	10	4	22	depthBelowSeaLayer	300	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	depthBelowSeaLayer	700	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	-	New for Phase 2.
263124	Time-mean sea surface height	avg_zos	m	10	3	1	oceanSurface	-

Fields on model levels

Ocean (levtype `o3d`)

Time resolution: 1 x daily (date=YYYYMMDD,time=0000)
NEMO: 75 model levels: (1, ..., 75)
ICON: 72 model levels: (1, ..., 72)
FESOM: 69 model levels: (1, ..., 69)

param Id	name	short Name	units	discipline	parameter Category	parameter Number	type Of Level	level
263500	Time-mean sea water practical salinity	avg_so	g kg**-1	10	4	21	oceanModelLayer	<as-above>
263501	Time-mean sea water potential temperature	avg_thetao	K	10	4	18	oceanModelLayer	<as-above>
263505	Time-mean northward sea water velocity	avg_von	m s**-1	10	4	24	oceanModelLayer	<as-above>
263506	Time-mean eastward sea water velocity	avg_uoe	m s**-1	10	4	23	oceanModelLayer	<as-above>
263507	Time-mean upward sea water velocity	avg_wo	m s**-1	10	4	27	oceanModel	<as-above>

Accumulated encodings

Fields on a single level or surface

Atmosphere (levtype `sfc`)

Time resolution: Hourly accumulation (time=0000/0100/...)

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
~~231010~~	~~Surface runoff~~	~~surfro~~	~~kg m**-2~~	2	0	51	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~231012~~	~~Sub-surface runoff~~	~~ssurfro~~	~~kg m**-2~~	2	0	52	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~228144~~	~~Snowfall water equivalent~~	sf	~~kg m**-2~~	0	1	53	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~146~~	~~Surface sensible heat flux~~	~~sshf~~	~~J m**-2~~	0	0	11	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~147~~	~~Surface latent heat flux~~	~~slhf~~	~~J m**-2~~	0	0	10	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~169~~	~~Surface short-wave (solar) radiation downwards~~	~~ssrd~~	~~J m**-2~~	0	4	7	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~175~~	~~Surface long-wave (thermal) radiation downwards~~	~~strd~~	~~J m**-2~~	0	5	3	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~176~~	~~Surface net short-wave (solar) radiation~~	~~ssr~~	~~J m**-2~~	0	4	9	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~177~~	~~Surface net long-wave (thermal) radiation~~	~~str~~	~~J m**-2~~	0	5	5	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~178~~	~~Top net short-wave (solar) radiation~~	~~tsr~~	~~J m**-2~~	0	4	9	~~nominalTop~~	-	1	Removed in Phase 2 in favour of mean flux
~~179~~	~~Top net long-wave (thermal) radiation~~	~~ttr~~	~~J m**-2~~	0	5	5	~~nominalTop~~	-	1	Removed in Phase 2 in favour of mean flux
~~180~~	~~Time-integrated eastward turbulent surface stress~~	~~ewss~~	~~N m**-2 s~~	0	2	62	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~181~~	~~Time-integrated northward turbulent surface stress~~	~~nsss~~	~~N m**-2 s~~	0	2	63	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~260259~~	~~Evaporation~~	~~eva~~	~~kg m**-2~~	0	1	79	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~212~~	~~TOA incident short-wave (solar) radiation~~	~~tisr~~	~~J m**-2~~	0	4	7	~~nominalTop~~	-	1	Removed in Phase 2 in favour of mean flux
~~228228~~	~~Total Precipitation~~	tp	~~kg m**-2~~	0	1	52	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~260654~~	~~Time-integrated eastward turbulent surface stress due to surface roughness~~	~~etsssr~~	~~N m**-2 s~~	0	2	66	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux
~~260655~~	~~Time-integrated northward turbulent surface stress due to surface roughness~~	~~ntsssr~~	~~N m**-2 s~~	0	2	67	~~surface~~	-	1	Removed in Phase 2 in favour of mean flux

Maximum encodings

There are no maximum encodings for this dataset.

Minimum encodings

There are no minimum encodings for this dataset.

Instantaneous encodings

Fields on a single level or surface

Atmosphere (levtype sfc)

Fields on pressure levels (levtype pl)

Fields on model levels

Snow (levtype sol)

Soil (levtype sol)

Fields on height levels (levtype hl)

Mean encodings

Fields on a single level or surface

Atmosphere (levtype sfc)

Sea ice (levtype o2d)

Ocean (levtype o2d)

Fields on model levels

Ocean (levtype o3d)

Accumulated encodings

Fields on a single level or surface

Atmosphere (levtype sfc)

Maximum encodings

Minimum encodings

Atmosphere (levtype `sfc`)

Fields on pressure levels (levtype `pl`)

Snow (levtype `sol`)

Soil (levtype `sol`)

Fields on height levels (levtype `hl`)

Atmosphere (levtype `sfc`)

Sea ice (levtype `o2d`)

Ocean (levtype `o2d`)

Ocean (levtype `o3d`)

Atmosphere (levtype `sfc`)