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EPT-2 Hindcasts

EPT-2 Hindcasts

For detailed information about the EPT-2 model, including technical specifications and available parameters, see the EPT-2 Model Overview.

Important Parameter Naming Disclaimer:

  • Parameter names have changed from ECMWF shortnames to human-readable longnames based on customer requests (e.g., "2t" is now "air_temperature_at_height_level_2m")

  • All EPT-2 products use the new human-readable parameter names

Hindcasts Details

  • Hindcasts are global with a grid of 2160×4320

  • Hindcasts are from 2023-01-01 to 2024-12-28

  • Hindcasts are run 4 times a day at 00, 06, 12, 18 UTC

  • Hindcasts are chunked as (time: 1, prediction_timedelta: 144, lat: 180, lon: 360)

  • Access URLs:

    • prognostic parameters: https://data.jua.ai/hindcasts/ept-2/v2/global/2023-01-01-to-2024-12-28.zarr

    • solar parameters: https://data.jua.ai/hindcasts/ept-2/v2/global/solar-2023-01-01-to-2024-12-28.zarr

Exposed Variables

Name

EMCWF Code

Description

Units

2t

air_temperature_at_height_level_2m

Air temperature at 2m

Kelvin

10si

wind_speed_at_height_level_10m

Horizontal wind speed at 10m

m s⁻¹

10wdir

wind_direction_at_height_level_10m

Horizontal wind direction at 10m

Degrees true

100si

wind_speed_at_height_level_100m

Horizontal wind speed at 100m

m s⁻¹

100wdir

wind_direction_at_height_level_100m

Horizontal wind direction at 100m

Degrees true

msl

air_pressure_at_mean_sea_level

Mean Sea-level Pressure

Pa

ssrd

surface_downwelling_shortwave_flux_sum_1h

Surface solar downward irradiance

J m⁻²

z_500

wind_direction_at_height_level_100m

Geopotential

m² s⁻²

Pressure levels: 5000, 10000, 15000, 20000, 25000, 30000, 40000, 50000, 60000, 70000, 85000, 92500, 100000 Pa

Additional Variables on Request

Name

EMCWF Code

Description

Units

atmosphere_mass_content_of_water_vapor

tcwv

Total column vertically-integrated water vapour

kg m⁻²

dew_point_temperature_at_height_level_2m

2d

2 metre dewpoint temperature

K

air_temperature_at_pressure_level (at 13 levels)

t

Temperature at a specified pressure level

K

eastward_wind_at_pressure_level (at 13 levels)

u

U component of wind

m s⁻¹

northward_wind_at_pressure_level (at 13 levels)

v

V component of wind

m s⁻¹

specific_humidity_at_pressure_level (at 13 levels)

q

The mass of water vapour per kilogram of moist air at a specified pressure level

kg kg⁻¹

geopotential_at_pressure_level (at 13 levels)

z

The gravitational potential energy of a unit mass

m² s⁻²

EPT-2 Early Hindcasts

Hindcasts Details

  • Hindcasts are global with a grid of 1440x2880

  • Hindcasts are from 2024-03-01 to 2024-12-31

  • Hindcasts are run 4 times a day at 00, 06, 12, 18 UTC

  • Hindcasts are chunked as (time: 1, prediction_timedelta: 144, lat: 120, lon: 240)

  • Access URLs:

    • prognostic parameters: https://data.jua.ai/hindcasts/ept-2-early/v2/global/2024-03-01-to-2024-12-31.zarr/

    • solar parameters: https://data.jua.ai/hindcasts/ept-2-early/v2/global/solar-2024-03-01-to-2024-12-31.zarr/

Exposed Variables

Name

EMCWF Code

Description

Units

2t

air_temperature_at_height_level_2m

Air temperature at 2m

Kelvin

10si

wind_speed_at_height_level_10m

Horizontal wind speed at 10m

m s⁻¹

10wdir

wind_direction_at_height_level_10m

Horizontal wind direction at 10m

Degrees true

100si

wind_speed_at_height_level_100m

Horizontal wind speed at 100m

m s⁻¹

100wdir

wind_direction_at_height_level_100m

Horizontal wind direction at 100m

Degrees true

msl

air_pressure_at_mean_sea_level

Mean Sea-level Pressure

Pa

ssrd

surface_downwelling_shortwave_flux_sum_1h

Surface solar downward irradiance

J m⁻²

z_500

wind_direction_at_height_level_100m

Geopotential

m² s⁻²

Pressure levels: 5000, 10000, 15000, 20000, 25000, 30000, 40000, 50000, 60000, 70000, 85000, 92500, 100000 Pa

Additional Variables on Request

Name

EMCWF Code

Description

Units

atmosphere_mass_content_of_water_vapor

tcwv

Total column vertically-integrated water vapour

kg m⁻²

dew_point_temperature_at_height_level_2m

2d

2 metre dewpoint temperature

K

air_temperature_at_pressure_level (at 13 levels)

t

Temperature at a specified pressure level

K

eastward_wind_at_pressure_level (at 13 levels)

u

U component of wind

m s⁻¹

northward_wind_at_pressure_level (at 13 levels)

v

V component of wind

m s⁻¹

relative_humidity_at_pressure_level (at 13 levels)

r

Relative humidity at a specified pressure level

%

geopotential_at_pressure_level (at 13 levels)

z

The gravitational potential energy of a unit mass

m² s⁻²

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