Set V - Seasonal 7-month forecast (SEAS)

SEAS comprises ensembles of individual forecasts coupled to an ocean model and post-processed products of average conditions (e.g. monthly averages) with the associated uncertainty. Products are available up to 7 months ahead.

The following sub-sets are available:

V-i: Monthly means of ensemble means

Field computed from data of the daily individual forecast runs (section V-v) and averaged over all ensemble members. The fields are provided in GRIB code.

V-ii: Monthly mean anomalies of ensemble means

V-iii: Monthly means of individual ensemble members

V-iv: Monthly mean anomalies of individual ensemble members

V-v: Individual forecast runs

Definition of the monthly fields

The definition of the month is in accordance to the calendar month of the western calendar

  • Monthly means are computed using values at write-up times 00, 06, 12 and 18 UTC for
    • 2m temperature (K)
    • 10m U-velocity (m/s)
    • 10m V-velocity (m/s)
    • MSLP (Pa)
  • Monthly means are computed using values at write-up times 00 and 12 UTC for
    • Pressure-level parameters
  • Monthly means are computed using values at the write-up time 00 for
    • Sea surface temperature (K)
    • Soil temperature level 1 (K)
    • Volumetric soil water layer 1 (m**3 m**-3)
  • Monthly mean total precipitation (m/s) is the rate of precipitation during the month.
  • Maximum temperature at 2 meters (K) is the monthly mean of the maximum of MX2T (Maximum temperature at 2 meter since last post-processing).
  • Minimum temperature at 2 meters (K) is the monthly mean of the minimum of MN2T (Minimum temperature at 2 meters since last post-processing).

Dissemination schedule

(dissemination data stream indicator = L) 

Forecast time Time available
Forecast month 1-7 5th of each month 12:00 UTC

Parameters

V-i: Monthly means of ensemble means

Forecast ranges & resolution

Ranges Base times Resolution
1 to 7 month 00 UTC
  • 0.4° x 0.4° lat/long grid or any multiple thereof (global or sub-area)
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) O320 (35 km) grid (global or sub-area)
  • Spectral components (T319) for upper-air fields (global area only)

 V-i-a: Single level

Short name Long name Unit ID Additional information
10SI 10 metre wind speed m s-1 207  
10U  10 metre U-velocity  m s-1  165  
10V  10 metre V-velocity  m s-1  166  
2D  2 metre dewpoint temperature  K  168  
2T  2 metre temperature  K  167  
CP Convective precipitation m 143

Precipitation from updraughts in the convection scheme. Accumulated field.
EWSSRA East-west surface stress rate of accumulation N m-2 172180

Eastward surface stress due to turbulent processes. Accumulated field.
E Evaporation m of water equivalent 182

Moisture flux from the surface into the atmosphere. Accumulated field (by model convention downward fluxes are positive).
FAL Forecast albedo 0-1 243

Albedo as used by the IFS, consisting of a background albedo, modified over the ocean dependent on solar elevation and modified over land areas with snow
IEWS Instantaneous eastward turbulent surface stress N m-2 229 SEAS5
INSS Instantaneous northward turbulent surface stress N m-2 230  SEAS5
LICD Lake ice depth m 228014 SEAS5
LMLT Lake mix-layer temperature K 228008 SEAS5
LSM (inv) Land/sea mask  (0, 1)  172 Provided free of charge once with every forecast dissemination
LSP Large-scale precipitation m 142

Precipitation from the cloud scheme (which also takes detrained water/ice from the convection scheme as input). Accumulated field.
LCC Low cloud cover 0-1 186

Cloud cover derived from model levels between the surface and 0.8 of the surface pressure using the model's overlap assumption
MX2T24 Maximum temperature at 2m in the last 24 hours

K

 51  
MSL  Mean sea level pressure  Pa  151  
SSRO Mean subsurface runoff rate m 9  
SRO Mean surface runoff rate      
MN2T24

Minimum temperature at 2m in the last 24 hours

 K 52  
NSSSRA North-south surface stress rate of accumulation N m-2 172181  
Z (inv) Orography

m2 s-2

 129 Provided free of charge once with every forecast dissemination
RO Runoff m 205

Amount of water that is lost from the soil through surface runoff and deep soil drainage. Accumulated field.
CI Sea-ice cover 0-1 31

Fraction of grid box that is covered with sea ice (kept constant during forecast)
SSTK  Sea surface temperature  K  34  
RSN  Snow density  kg m**-3  33  
SD  Snow depth  m of water equivalent 141  
SF Snowfall m of water equivalent 144

Convective + stratiform snowfall. Accumulated field.
STL1  Soil temperature level 1  K  139

Top soil layer: 1-7 cm Soil temperature (ST) before 19930804
STL2

Soil temperature level 2

 K 170

Soil layer 2: 7-28 cm Deep soil temperature (DST) before 19930804
STL3 Soil temperature level 3 K 183

Soil layer 3: 28-100 cm. Climatological deep soil temperature (CDST) before 19930804.
STL4 Soil temperature level 4 K 236

Layer 100-289 cm
SOIRA Solar insolation rate of accumulation W m-2 s-1 172212 SEAS5
SUND Sunshine duration s 189

Time that radiation in the direction of the sun is above 120 W/m2. Accumulated field.
SLHF Surface latent heat flux J m-2 147

Exchange of latent heat with the surface through turbulent diffusion. Accumulated field. (by model convention, downward fluxes are positive)
SSR Surface net solar radiation J m-2 176

Net solar radiation at the surface. Accumulated field.
STR Surface net thermal radiation J m-2 177

Net thermal radiation at the surface. Accumulated field (by model convention downward fluxes are positive).
SSHF Surface sensible heat flux J m-2 146

Exchange of heat with the surface through turbulent diffusion. Accumulated field (by model convention, downward fluxes are positive).
SSRD Surface solar radiation downwards J m-2 169

Accumulated field
STRD Surface thermal radiation downwards J m-2 175

Accumulated field
TSR Top net solar radiation J m-2 178

Net solar radiation at the top of the atmosphere. Accumulated field.
TTR Top net thermal radiation J m-2 179

Net thermal radiation at the top of the atmosphere. Accumulated field (by model convention downward fluxes are positive).
TCC Total cloud cover 0-1 164

Total cloud cover derived from model levels using the model's overlap assumption
TCIW Total column cloud ice water kg m-3 79

Vertical integral of cloud ice water content
TCLW Total column cloud liquid water kg m-3 78

Vertical integral of cloud liquid water content
TCO3 Total column ozone kg m-3 206

Vertically integrated ozone. Before 20010612 was in Dobsons. 1 Dobson = 2.1415E-5 kg m**-2.
TCWV Total column water vapour kg m-3 137

Vertically integrated water vapour
TP  Total precipitation  m 228

Convective precipitation + stratiform precipitation (CP +LSP). Accumulated field.
SWVL1 Volumetric soil water layer 1 m3 m-3 39

Top soil layer: 0-7 cm
SWVL2 Volumetric soil water layer 2 m3 m-3 40

Soil layer 2: 7-28 cm
SWVL3 Volumetric soil water layer 3 m3 m-3 41

Soil layer 3: 28-100 cm
SWVL4 Volumetric soil water layer 4 m3 m-3 42 Soil layer 4: 100-289 cm

V-i-b: Pressure levels

Available levels 1000, 925, 850, 700, 500, 400, 300, 200 hPa

Short name Long name Unit ID Additional information
D Divergence s-1 155  
GH Geopotential height m 156  
O3 Ozone mass mixing ratio kg kg-1 203  
Q Specific humidity kg kg1 133  
T Temperature K 130  
U U-velocity m s-1 131  
V V-velocity m s-1 132  
VO Vorticity (relative) s-1 138  

V-ii: Monthly mean anomalies of ensemble means

Ranges Base times Resolution
1 to 7 month 00 UTC
  • 0.4° x 0.4° lat/long grid or any multiple thereof (global or sub-area)
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) O320 (35 km) grid (global or sub-area)
  • Spectral components (T319) for upper-air fields (global area only)

V-ii-a: Single level

Short name Long name Unit ID Additional information
10UA 10 metre U wind component anomaly m s-1 171165  
10VA 10 metre V wind component anomaly m s-1 171166  
10FGA 10 metre wind gust anomaly m s-1 171049  
10SIA 10 metre wind speed anomaly m s-1 171207  
2DA 2 metre dewpoint temperature anomaly K 171168  
2TA 2 metre temperature anomaly K 171167  
CPA Convective precipitation anomaly m 173143  
EWSSARA East-west surface stress anomalous rate of accumulation N m-2 173180  
EA Evaporation anomaly m of water s-1 173182  
FALA Forecast albedo anomaly 0-1 171243  
IEWSA Instantaneous eastward turbulent surface stress anomaly N m-2 171229 SEAS5
INSSA

Instantaneous northward turbulent surface stress anomaly

 N m-2 171230 SEAS5
LSM(inv) Land/sea mask (0, 1) 172 Provided free of charge once with every forecast dissemination
LICDA Lake ice depth anomaly m 171025 SEAS5
LMLTA Lake mix-layer temperature anomaly K 171024 SEAS5
LSPA Large-scale precipitation anomaly m 171142  
LCCA Low cloud cover anomaly 0-1 171186  
MX2T24A Maximum 2 metre temperature in the last 24 hours anomaly K 171051  
MSLA Mean sea level pressure anomaly Pa 171151  
MSSRORA Mean sub-surface runoff rate anomaly m of water equivalent s-1 173008  
MSRORA Mean surface runoff rate anomaly m of water equivalent s-1 173009  
MN2T24A Minimum 2 metre temperature in the last 24 hours anomaly K 171052  
NSSSRA North-south surface stress anomaly N m-2 173181  
ROA Runoff anomaly m s-1 171205  
SICA Sea-ice cover anomaly 0-1 171031  
SSTA Sea surface temperature anomaly K 171034  
RSNA Snow density anomaly kg m**-3 171033  
SDA Snow depth anomaly m of water equivalent 171141  
SFARA Snowfall anomalous rate of accumulation m of water equivalent s-1 173144  
STAL1 Soil temperature anomaly level 1 K 171139  
STAL2 Soil temperature anomaly level 2 K 171170  
STAL3 Soil temperature anomaly level 3 K 171183  
STAL4 Soil temperature anomaly level 4 K 171236  
SOIARA Solar insolation anomalous rate of accumulation W m-2 s-1 171212 SEAS5
SUNDARA Sunshine duration anomalous rate of accumulation dimensionless 173189  
SLHFA Surface latent heat flux anomaly J m-2 173147  
STRA Surface net thermal radiation anomaly J m-2 171177  
SSHFA Surface sensible heat flux anomaly J m-2 173146  
SSRA Surface solar radiation anomaly J m-2 173176  
SSRDA Surface solar radiation downwards anomaly J m-2 173169  
STRDA Surface thermal radiation downwards anomaly J m-2 173177  
TSRA Top net solar radiation anomaly J m-2 173178  
TTRA Top net thermal radiation anomaly J m-2 173179  
TCCA Total cloud cover anomaly (0-1) 171164  
TCIWA Total column ice water anomaly kg m-2 171079  
TCLWA Total column liquid water anomaly kg m-2 171078  
TCO3A Total column ozone anomaly kg m-2 171206  
TCWVA Total column water vapour anomaly kg m-2 171137  
TPARA Total precipitation anomalous rate of accumulation m s-1 173228  
SWVAL1 Volumetric soil water anomaly level 1 m3 m-3 171039  
SWVAL2 Volumetric soil water anomaly level 2 m3 m-3 171040  
SWVAL3 Volumetric soil water anomaly level 3 m3 m-3 171041  
SWVAL4 Volumetric soil water anomaly level 4 m3 m-3 171042  
Z(inv) Orography m2 s-2 129 Provided free of charge once with every forecast dissemination

 V-ii-b: Pressure levels

Short name Long name Unit  ID Additional information
DA Divergence anomaly S-1 171155  
GHA Height anomaly m 171156  
O3A Ozone mass mixing ratio anomaly kg kg-1 171203  
VOA Relative vorticity anomaly s-1 171138  
QA Specific humidity anomaly kg kg-1 171133  
TA Temperature K 171130  
UA U component of wind anomaly m s-1 171131  
VA V component of wind anomaly m s-1 171132  

V-iii: Monthly means of individual ensemble members

Ranges Forecast time step Base times Resolution
1 to 7 month 6-hourly 00 UTC
  • 0.4° x 0.4° lat/long grid or any multiple thereof (global or sub-area)
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) O320 (35 km) grid (global or sub-area)
  • Spectral components (T319) for upper-air fields (global area only)

 V-iii-a: Single level

Short name Long name Unit ID Additional information
10U 10 metre U-velocity

m s**-1

 165  
10V 10 metre V-velocity m s**-1 166  
10SI 10 metre wind speed m s**-1 207  
2D 2 metre dewpoint temperature K 168  
2T 2 metre temperature K 167  
CP Convective precipitation m 143

Precipitation from updraughts in the convection scheme. Accumulated field.
EWSS

East-west surface stress rate of accumulation

 N m-2 172180

Eastward surface stress due to turbulent processes. Accumulated field.
E Evaporation

m of water equivalent

 182

Moisture flux from the surface into the atmosphere. Accumulated field (by model convention downward fluxes are positive).
FAL Forecast albedo (0-1) 243

Albedo as used by the IFS, consisting of a background albedo, modified over the ocean dependent on solar elevation and modified over land areas with snow
IEWS Instantaneous eastward turbulent surface stress N m-2 229  
INSS Instantaneous northward turbulent surface stress N m-2 230  
LICD Lake ice depth (0-1) 228014  
LMLT Lake mix-layer temperature K 228008  
LSM(inv) Land/sea mask (0, 1) 172 Provided free of charge once with every forecast dissemination
LSP

Large-scale precipitation

 m 142

Precipitation from the cloud scheme (which also takes detrained water/ice from the convection scheme as input). Accumulated field.
LCC Low cloud cover (0-1) 186

Cloud cover derived from model levels between the surface and 0.8 of the surface pressure using the model's overlap assumption
MX2T24 Maximum temperature at 2m in the last 24 hours K 51  
MSL Mean sea level pressure Pa 151  
MN2T24 Minimum temperature at 2m in the last 24 hours K 52  
NSSS North-south surface stress rate of accumulation

N m**-2 s

 172181

Northward surface stress due to turbulent processes. Accumulated field.
Z(inv) Orography m2 s-2 129 provided free of charge once with every forecast dissemination
RO Runoff m 205

Amount of water that is lost from the soil through surface runoff and deep soil drainage. Accumulated field.
SSTK Sea surface temperature K 34  
CI Sea-ice cover (0-1) 31

Fraction of grid box that is covered with sea ice (kept constant during forecast)
RSN Snow density kg m**-3 33  
SD Snow depth m of equivalent water 141  
SF Snowfall

m of water equivalent

 144

Convective + stratiform snowfall. Accumulated field.
STL1 Soil temperature level 1 K 139

Top soil layer: 1-7 cm Soil temperature (ST) before 19930804
STL2 Soil temperature level 2 K 170

Soil layer 2: 7-28 cm Deep soil temperature (DST) before 19930804
STL3 Soil temperature level 3 K 183

Soil layer 3: 28-100 cm. Climatological deep soil temperature (CDST) before 19930804.
STL4 Soil temperature level 4 K 236

Layer 100-289 cm
SOIRA Solar insolation rate of accumulation W m-2 s-1 172212  
SUND Sunshine duration s 189

Time that radiation in the direction of the sun is above 120 W/m2. Accumulated field.
SLHF

Surface latent heat flux

J m**-2

 147

Exchange of latent heat with the surface through turbulent diffusion. Accumulated field. (by model convention, downward fluxes are positive)
SSR

Surface net solar radiation

 J m**-2 176

Net solar radiation at the surface. Accumulated field.
STR

Surface net thermal radiation

 J m**-2 177

Net thermal radiation at the surface. Accumulated field (by model convention downward fluxes are positive).
SSHF

Surface sensible heat flux

 J m**-2 146

Exchange of heat with the surface through turbulent diffusion. Accumulated field (by model convention, downward fluxes are positive).
SSRD

Surface solar radiation downwards

 J m**-2 169

Accumulated field
STRD

Surface thermal radiation downwards

 J m**-2 175 Accumulated field
TSR

Top net solar radiation

 J m**-2 178

Net solar radiation at the top of the atmosphere. Accumulated field.
TTR

Top net thermal radiation

 J m**-2 179

Net thermal radiation at the top of the atmosphere. Accumulated field (by model convention downward fluxes are positive).
TCC

Total cloud cover

 (0-1) 164

Total cloud cover derived from model levels using the model's overlap assumption
TCIW

Total column cloud ice water

kg m**-2

 79

Vertical integral of cloud ice water content
TCLW

Total column cloud liquid water

kg m**-2

 78

Vertical integral of cloud liquid water content
TCO3

Total column ozone

 kg m**-2 206

Vertically integrated ozone. Before 20010612 was in Dobsons. 1 Dobson = 2.1415E-5 kg m**-2.
TCWV

Total column water vapour

 kg m**-2 137

Vertically integrated water vapour
TP Total precipitation m 228

Convective precipitation + stratiform precipitation (CP +LSP). Accumulated field.
SWVL1 Volumetric soil water layer 1

m**3 m**-3

 39

Top soil layer: 0-7 cm
SWVL2 Volumetric soil water layer 2

m**3 m**-3

 40

Soil layer 2: 7-28 cm
SWVL3 Volumetric soil water layer 3

m**3 m**-3

 41

Soil layer 3: 28-100 cm
SWVL4 Volumetric soil water layer 4

m**3 m**-3

 42

Soil layer 4: 100-289 cm

V-iii-b: Pressure levels

Available at 1000, 925, 850, 700, 500, 400, 300, 200 hPa unless otherwise specified.

Short name Long name Unit  ID Additional information
D Divergence

s**-1

 155

 
GH Geopotential height m 156

Geopotential divided by a constant value of g = 9.80665
O3

Ozone mass mixing ratio

kg kg**-1

 203  
Q Specific humidity

kg kg**-1

 133

Grid box mean (mass of water vapour / mass of moist air)
T Temperature K 130  
U U-velocity m s-1 131  
V V-velocity m s-1 132  
VO Vorticity (relative) s**-1 138

 

V-iv: Monthly mean anomalies of individual ensemble members

Ranges Forecast time step Base times Resolution
1 to 7 month 6-hourly 00 UTC
  • 0.4° x 0.4° lat/long grid or any multiple thereof (global or sub-area)
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) O320 (35 km) grid (global or sub-area)
  • Spectral components (T319) for upper-air fields (global area only)

 V-iv-a: Single level

Short name Long name Unit ID Additional information
10UA 10 metre U wind component anomaly m s**-1 171165  
10VA 10 metre V wind component anomaly m s**-1 171166  
10FGA 10 metre wind gust anomaly m s-1 171049  
10SIA 10 metre wind speed anomaly m s**-1 171207  
2DA 2 metre dewpoint temperature anomaly K 171168  
2TA 2 metre temperature anomaly K 171167  
CPA Convective precipitation anomaly m 171143
 
EWSSARA East-west surface stress anomalous rate of accumulation

N m**-2

 173180  
EVARA Evaporation anomalous rate of accumulation m of water s**-1 173182  
FALA Forecast albedo anomaly (0-1) 171243  
IEWSA Instantaneous X surface stress anomaly N m**-2 171229 SEAS5
INSSA Instantaneous Y surface stress anomaly N m**-2 171230 SEAS5
LICDA Lake ice depth anomaly (0-1) 26 SEAS5
LMLTA Lake mix-layer temperature anomaly K 228008 SEAS5
LSM(inv) Land/sea mask (0, 1) 172 provided free of charge once with every forecast dissemination
LSPA Large-scale precipitation anomaly m 171142  
LCCA Low cloud cover anomaly m 171186  
MX2T24A Maximum 2 metre temperature in the last 24 hours anomaly K 171051  
MSLA Mean sea level pressure anomaly Pa 171151  
MSSRORA Mean sub-surface runoff rate anomaly m of water equivalent s-1 173008  
MSRORA Mean surface runoff rate anomaly m of water equivalent s-1 173009  

MN2T24A

 Minimum 2 metre temperature in the last 24 hours anomaly K 171052  
NSSSARA North-south surface stress anomalous rate of accumulation

N m**-2

 173181  
Z(inv) Orography m2 s-2 129 provided free of charge once with every forecast dissemination
ROARA Runoff anomalous rate of accumulation m s**-1 171205  
SSTA Sea surface temperature anomaly K 171034  
SICA Sea-ice cover anomaly (0-1) 171031  
RSNA Snow density anomaly kg m**-3 171033  
SDA Snow depth anomaly m of water equivalent 171141  
SFARA Snowfall (convective + stratiform) anomalous rate of accumulation m of water equivalent 173144  
STAL1 Soil temperature anomaly level 1 K 171139  
STAL2 Soil temperature anomaly level 2 K 171036  
STAL3 Soil temperature anomaly level 3 K 171183  
STAL4 Soil temperature anomaly level 4 K 171236  
SOIARA

Solar insolation anomalous rate of accumulation

 W m**-2 s**-1 173212  
SUNDARA Sunshine duration anomalous rate of accumulation dimensionless 173189  
SLHFARA Surface latent heat flux anomalous rate of accumulation

J m**-2

 173147  
SSHFARA Surface sensible heat flux anomalous rate of accumulation J m**-2 173146  
SSRARA Surface solar radiation anomalous rate of accumulation J m**-2 173176  
SSRDARA Surface solar radiation downwards anomalous rate of accumulation J m**-2 173169  
STRARA Surface thermal radiation anomalous rate of accumulation J m**-2 173177  
STRDARA Surface thermal radiation downwards anomalous rate of accumulation J m**-2 173175  
TSRARA Top solar radiation anomalous rate of accumulation J m**-2 173178  
TTRARA Top thermal radiation anomalous rate of accumulation J m**-2 173179  
TCCA Total cloud cover anomaly (0-1)

171164

  
TCIWA Total column ice water anomaly

kg m**-2

 171079  
TCLWA Total column liquid water anomaly kg m**-2 171078  
TCO3A Total column ozone anomaly kg m**-2 171206  
TCWVA Total column water vapour anomaly kg m**-2 171137  
TPARA Total precipitation anomalous rate of accumulation m s**-1 173228  
SWVAL1 Volumetric soil water anomaly level 1 m**3 m**-3 171039  
SWVAL2 Volumetric soil water anomaly level 2 m**3 m**-3 171040  
SWVAL3 Volumetric soil water anomaly level 3 m**3 m**-3 171041  
SWVAL4 Volumetric soil water anomaly level 4 m**3 m**-3 171042  

V-iv-b: Pressure levels

Available at 1000, 925, 850, 700, 500, 400, 300, 200 hPa unless otherwise specified.

Short name Long name Unit  ID Additional information
DA Divergence anomaly S-1 171155  
GHA Height anomaly m 171156  
O3A Ozone mass mixing ratio anomaly kg kg-1 171203  
VOA Relative vorticity anomaly s-1 171138  
QA Specific humidity anomaly kg kg-1 171133  
TA Temperature K 3025  
UA U component of wind anomaly m s-1 171131  
VA V component of wind anomaly m s-1 171132  

V-v: Individual forecast runs

Ranges Forecast time step Base times Resolution
T+0h to T+5160h 6-hourly 00 UTC
  • 0.4° x 0.4° lat/long grid or any multiple thereof (global or sub-area)
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) O320 (35 km) grid (global or sub-area)
  • Spectral components (T319) for upper-air fields (global area only)

V-v-a: Single level - 6-hourly

Short name Long name Unit  ID Additional information
10U 10 metre U-velocity m s-1 165  
10V 10 metre V-velocity m s-1 166  
2D 2 metre dewpoint temperature K 168  
2T   2 metre temperature K 167  
IEWS Instantaneous eastward turbulent surface stress N m-2 229  
INSS Instantaneous northward turbulent surface stress N m-2 230  
MSL Mean sea level pressure Pa 151  
SSTK Sea surface temperature K 34 6-hourly with SEAS5
SF Snowfall m of water equivalent 144

Convective + stratiform snowfall. Accumulated field.
STL1 Soil temperature level 1 139 K

Top soil layer: 1-7 cm Soil temperature (ST) before 19930804
SSRD Surface solar radiation downwards J m-2 169

Accumulated field
STRD Surface thermal radiation downwards J m-2 175

Accumulated field
TCC Total cloud cover (0-1) 164

Total cloud cover derived from model levels using the model's overlap assumption
TP Total precipitation 228 m

Convective precipitation + stratiform precipitation (CP +LSP). Accumulated field.

V-v-b: Single level 24-hourly

Ranges Forecast time step Base times Resolution
T+0h to T+5160h 24-hourly 00 UTC
  • 0.4° x 0.4° lat/long grid or any multiple thereof (global or sub-area)
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) O320 (35 km) grid (global or sub-area)
  • Spectral components (T319) for upper-air fields (global area only)
Short name Long name Unit ID Additional information
CP Convective precipitation m 143

Precipitation from updraughts in the convection scheme. Accumulated field.
EWSS Eastward turbulent surface stress Nm**-2 180  
E Evaporation m of water equivalent 182

Moisture flux from the surface into the atmosphere. Accumulated field (by model convention downward fluxes are positive).
FAL Forecast albedo (0-1) 243

Albedo as used by the IFS, consisting of a background albedo, modified over the ocean dependent on solar elevation and modified over land areas with snow
IEWS Instantaneous eastward turbulent surface stress Nm**-2 229

SEAS5
INSS Instantaneous northward turbulent surface stress Nm**-2 230 SEAS5
CL (inv) Lake cover (0-1) 26 SEAS5 - Only for step 0
DL (inv) Lake depth m 228007 SEAS5 - Only for step 0
LICD Lake ice depth m 228014 SEAS5
LMLT Lake mix-layer temperature K 228008 SEAS5
LSM (inv) Land/sea mask (0-1) 172 provided free of charge once with every forecast dissemination
LSP Large-scale precipitation m 142

Precipitation from the cloud scheme (which also takes detrained water/ice from the convection scheme as input). Accumulated field.
MX2T24 Maximum temperature at 2m in the last 24 hours K 51  
MEAN2T24 Mean temperature at 2 metres in the last 24 hours K 55  
MN2T24 Minimum temperature at 2m in the last 24 hours K 52  
NSSS Northward turbulent surface stress Nm**-2 181  
Z (inv) Orography m2 s-2 129 provided free of charge once with every forecast dissemination
RO Runoff m 205

Amount of water that is lost from the soil through surface runoff and deep soil drainage. Accumulated field.
CI Sea-ice cover (0-1) 31

Fraction of grid box that is covered with sea ice (kept constant during forecast)
RSN Snow density kg m**-3 33  
SD Snow depth m of equivalent water 141  
SF Snowfall m of water equivalent 144

Convective + stratiform snowfall. Accumulated field.
STL2 Soil temperature level 2 K 170

Soil layer 2: 7-28 cm Deep soil temperature (DST) before 19930804
STL3 Soil temperature level 3 K 183

Soil layer 3: 28-100 cm. Climatological deep soil temperature (CDST) before 19930804.
STL4 Soil temperature level 4 K 236

Layer 100-289 cm
SSRO Sub-surface runoff m 9

 
SUND Sunshine duration s 189

Time that radiation in the direction of the sun is above 120 W/m2. Accumulated field.
SLHF Surface latent heat flux J m**-2 147

Exchange of latent heat with the surface through turbulent diffusion. Accumulated field. (by model convention, downward fluxes are positive)
SSR Surface net solar radiation J m**-2 176

Net solar radiation at the surface. Accumulated field.
STR Surface net thermal radiation J m**-2 177

Net thermal radiation at the surface. Accumulated field (by model convention downward fluxes are positive).
SRO Surface runoff m 8  
SSHF Surface sensible heat flux J m**-2 146

Exchange of heat with the surface through turbulent diffusion. Accumulated field (by model convention, downward fluxes are positive).
SSRD Surface solar radiation downwards J m**-2 169

Accumulated field
STRD Surface thermal radiation downwards J m**-2 175

Accumulated field
TISR TOA incident solar radiation J m**-2 212 SEAS5
TSR Top net solar radiation J m**-2 178

Net solar radiation at the top of the atmosphere. Accumulated field.
TTR Top net thermal radiation J m**-2 179

Net thermal radiation at the top of the atmosphere. Accumulated field (by model convention downward fluxes are positive).
TCC Total cloud cover (0-1) 164

Total cloud cover derived from model levels using the model's overlap assumption
TCIW Total column cloud ice water kg m**-2 79

Vertical integral of cloud ice water content
TCLW Total column cloud liquid water kg m**-2 78

Vertical integral of cloud liquid water content
TCO3 Total column ozone kg m**-2 206

Vertically integrated ozone. Before 20010612 was in Dobsons. 1 Dobson = 2.1415E-5 kg m**-2.
TCWV Total column water vapour kg m**-2 137

Vertically integrated water vapour
SWVL1 Volumetric soil water layer 1 m3 m-3 39

Top soil layer: 0-7 cm
SWVL2 Volumetric soil water layer 2 m3 m-3 40

Soil layer 2: 7-28 cm
SWVL3 Volumetric soil water layer 3 m3 m-3 41

Soil layer 3: 28-100 cm
SWVL4 Volumetric soil water layer 4 m3 m-3 42 Soil layer 4: 100-289 cm

V-v-c: Pressure levels 12-houlry

Available at 1000, 925, 850, 700, 500, 400, 300, 200 hPa unless otherwise specified.

Ranges Forecast time step Base times Resolution
T+0h to T+5160h 12-hourly 00 UTC
  • 0.4° x 0.4° lat/long grid or any multiple thereof (global or sub-area)
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) O320 (35 km) grid (global or sub-area)
  • Spectral components (T319) for upper-air fields (global area only)
Short name Long name Unit  ID Additional information
D Divergence

s**-1

 155

 
GH Geopotential height m 156

Geopotential divided by a constant value of g = 9.80665
O3

Ozone mass mixing ratio

kg kg**-1

 203  
Q Specific humidity

kg kg**-1

 133

Grid box mean (mass of water vapour / mass of moist air)
T Temperature K 130  
U U-velocity m s-1 131  
V V-velocity m s-1 132  
VO Vorticity (relative) s**-1 138

 

 

Last updated June 2018