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Appendix

List of Identification Keywords


Table 1:Type and its corresponding values.

KeywordDescriptionValueLong Name
typeSpecifies the type of field.fcForecast
efEnsemble forecast
cfControl forecast
pfPerturbed forecast
epEvent probability
tfTrajectory forecast

IFS

Table 2:Stream and its corresponding values of the IFS.

KeywordDescriptionValueLong NameReference Time
streamIdentifies the forecasting system used to generated the data when the same meteorological types are archived.operOperational Atmospheric model (daily archive)00 and 12 UTC
enfoEnsemble prediction system00, 06, 12, and 18 UTC
waefWave ensemble forecast00, 06, 12, and 18 UTC
waveWave model00 and 12 UTC
scdaAtmospheric model (short cutoff daily archive)06 and 18 UTC
scwvWave model (short cutoff)06 and 18 UTC

Table 3:Step and its corresponding values of the IFS.

KeywordDescriptionForecasting SystemReference TimeList of Time Steps
stepThe forecast time step in hours from the forecast base time.Control Forecast00 and 12 UTCfrom 0 to 144 by 3 and from 150 to 360 by 6
06 and 18 UTCfrom 0 to 144 by 3
Tropical cyclones tracks - HRES00 and 12 UTCfrom 0 to 240
06 and 18 UTCfrom 0 to 90
ENS00 and 12 UTCfrom 0 to 144 by 3 and from 150 to 360 by 6
06 and 18 UTCfrom 0 to 144 by 3
Tropical cyclones tracks - ENS00 and 12 UTCfrom 0 to 360
06 and 18 UTCfrom 0 to 144
Probabilities, daily weather events00 and 12 UTC0-24 to 336-360 by 12
Probabilities - atmosphere and wavefrom 12 to 360 by 12

AIFS Single

Table 4:Stream and its corresponding values of the AIFS Single.

KeywordDescriptionValueLong NameReference Time
streamIdentifies the forecasting system used to generated the data when the same meteorological types are archived.operOperational Atmospheric model (daily archive)00, 06, 12, and 18 UTC

Table 5:Step and its corresponding values of the AIFS Single.

KeywordDescriptionForecasting SystemReference TimeList of Time Steps
stepThe forecast time step in hours from the forecast base time.Deterministic00, 06, 12, and 18 UTCfrom 0 to 360 by 6
Tropical cyclones tracks00, 06, 12, and 18 UTCfrom 0 to 240

AIFS Ensemble

Table 6:Stream and its corresponding values of the AIFS Ensemble.

KeywordDescriptionValueLong NameReference Time
streamIdentifies the forecasting system used to generated the data when the same meteorological types are archived.enfoEnsemble prediction system00, 06, 12, and 18 UTC

Table 7:Step and its corresponding values of the AIFS Ensemble.

KeywordDescriptionForecasting SystemReference TimeList of Time Steps
stepThe forecast time step in hours from the forecast base time.ENS00, 06, 12, and 18 UTCfrom 0 to 360 by 6