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

Forecast time Time available
Forecast month 1-7 8th 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
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) N128 grid (global or sub-area)
  • Spectral components (T255) for upper-air fields (global area only)

V-i-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  
2D  2 metre dewpoint temperature  168  
2T  2 metre temperature  167  
LSM (inv) Land/sea mask  (0, 1)  172 provided free of charge once with every forecast dissemination
MN2T24  Minimum temperature at 2m in the last 24 hours  52  
MSL  Mean sea level pressure  Pa  151  
MX2T24     51  
RSN  Snow density  kg m**-3  33 New to catalogue
SD  Snow depth  m of equi 141  
SSTK  Sea surface temperature  34  
STL1  Soil temperature level 1  139  
TP  Total precipitation  m of equi 228  
Z (inv) Orography  m2 s-2  129 provided free of charge once with every forecast dissemination

V-i-b Pressure levels

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

Short name Long name Unit ID Additional information
GH Geopotential height m 156  
T Temperature K 130  
U U-velocity m s-1 131  
V V-velocity m s-1 132  

V-ii: Monthly mean anomalies of ensemble means

Ranges Forecast time step Base times Resolution
1 to 7 month 6-hourly 00 UTC
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) N128 grid (global or sub-area)
  • Spectral components (T255) 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  
2DA 2 metre dewpoint temperature anomaly K 171168  
2TA 2 metre temperature anomaly K 171167  
LSM(inv) Land/sea mask (0, 1) 172 provided free of charge once with every forecast dissemination
MN2T24A Minimum 2 metre temperature in the last 24 hours anomaly K 171052  
MSLA Mean sea level pressure anomaly Pa 171151  
MX2T24A Maximum 2 metre temperature in the last 24 hours anomaly K 171051  
RSNA Snow density anomaly kg m**-3 171033 New to catalogue
SDA Snow depth anomaly m of water equivalent 171141  
SSTA Sea surface temperature anomaly K 171034  
STAL1 Soil temperature anomaly level 1 K 171139  
TPARA Total precipitation anomalous rate of accumulation m s-1 173228  
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
GHA Height anomaly m 171156  
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-iii: Monthly means of individual ensemble members

Ranges Forecast time step Base times Resolution
1 to 7 month 6-hourly 00 UTC
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) N128 grid (global or sub-area)
  • Spectral components (T255) 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  
2D 2 metre dewpoint temperature K 168  
2T 2 metre temperature K 167  
LSM(inv) Land/sea mask (0, 1) 172 provided free of charge once with every forecast dissemination
MN2T24 Minimum temperature at 2m in the last 24 hours K 52  
MSL Mean sea level pressure Pa 151  
MX2T24 Maximum temperature at 2m in the last 24 hours K 51  
RSN Snow density kg m**-3 33 New to catalogue
SD Snow depth m of equivalent water 141  
SSTK Sea surface temperature K 34  
STL1 Soil temperature level 1 K 139  
SWVL1 Volumetric soil water layer 1 m3 m-3 39  
TP Total precipitation m of equivalent water 228  
Z(inv) Orography m2 s-2 129 provided free of charge once with every forecast dissemination

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
GH Geopotential height m 156  
T Temperature K 130  
U U-velocity m s-1 131  
V V-velocity m s-1 132  

V-iv: Monthly mean anomalies of individual ensemble members

Ranges Forecast time step Base times Resolution
1 to 7 month 6-hourly 00 UTC
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) N128 grid (global or sub-area)
  • Spectral components (T255) 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 171207  
10VA 10 metre V wind component anomaly m s**-1 171166  
2DA 2 metre dewpoint temperature anomaly K 171168  
2TA 2 metre temperature anomaly K 171167  
LSM(inv) Land/sea mask (0, 1) 172 provided free of charge once with every forecast dissemination
MN2T24A Minimum 2 metre temperature in the last 24 hours anomaly K 171052  
MSLA Mean sea level pressure anomaly Pa 171151  
MX2T24A Maximum 2 metre temperature in the last 24 hours anomaly K 171051  
RSNA Snow density anomaly kg m**-3 171033 New to catalogue
SDA Snow depth anomaly m of water equivalent 171141  
SSTA Sea surface temperature anomaly K  
STAL1 Soil temperature anomaly level 1 K 171139  
TPARA Total precipitation anomalous rate of accumulation m s-1 173228  
Z(inv) Orography m2 s-2 129 provided free of charge once with every forecast dissemination

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
GHA Height anomaly m 171156  
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

V-v-a Single level - 6-hourly

Ranges Forecast time step Base times Resolution
T+0h to T+5160h 6-hourly 00 UTC
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) N128 grid (global or sub-area)
  • Spectral components (T255) for upper-air fields (global area only)
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  
MSL Mean sea level pressure Pa 151  

V-v-b Single level 24-hourly

Ranges Forecast time step Base times Resolution
T+0h to T+5160h 24-hourly 00 UTC
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) N128 grid (global or sub-area)
  • Spectral components (T255) for upper-air fields (global area only)
Short name Long name Unit ID Additional information
CP Convective precipitation m 143  
EWSS Eastward turbulent surface stress Nm**-2 180  
LSM (inv) Land/sea mask (0, 1) 172 provided free of charge once with every forecast dissemination
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  
MX2T24 Maximum temperature at 2m in the last 24 hours K 51  
NSSS Northward turbulent surface stress Nm**-2 181  
RSN Snow density kg m**-3 33 New to catalogue
SD Snow depth m of equivalent water 141  
SSRD Surface solar radiation downwards J m-2 169  
SSTK Sea surface temperature K 34  
STL1 Soil temperature level 1 K 139  
STL2 Soil temperature level 2 K 170  
STL3 Soil temperature level 3 K 183  
STL4 Soil temperature level 4 K 236  
SRO Surface runoff m 8  
SSRO Sub-surface runoff m 9

 

STRD Surface thermal radiation downwards J m-2 175

 

SWVL1 Volumetric soil water layer 1 m3 m-3 39  
SWVL2 Volumetric soil water layer 2 m3 m-3 40  
SWVL3 Volumetric soil water layer 3 m3 m-3 41  
SWVL4 Volumetric soil water layer 4 m3 m-3 42  
TCWV Total column water vapour kg m-2 137  
TP Total precipitation m of equivalent water 228  
Z (inv) Orography m2 s-2 129 provided free of charge once with every forecast dissemination

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
  • 0.75° x 0.75° lat/long grid or any multiple thereof (global or sub-area)
  • On model (Gaussian) N128 grid (global or sub-area)
  • Spectral components (T255) for upper-air fields (global area only)
Short name Long name Unit  ID Additional information
GH Geopotential height m 156  
T Temperature K 130  
U U-velocity m s-1 131  
V V-velocity m s-1 132  

Last updated 27-04-2016