ERA5 daily data on single levels - atmosphere
This dataset is a curated subset of daily averages derived from ECMWF’s ERA5 hourly data on single levels. It is produced by the Earth Data Hub Team based on the ERA5 hourly data on single levels dataset. It uses the standard UTC day as a base for averages and accumulations, i.e., the day starts at 00:00 UTC and ends at 23:59 UTC on all pixels irrespective of the latitude and the local time.
For instantaneous variables, e.g. the 2 meter temperature (t2m), the operation applied is the Xarray .resample("D").mean() method.
For accumulated variables, e.g. the total precipitation (tp), the values are the total accumulation for the day. Note that the original ECMWF data already resets these values at the start of the UTC day on all latitudes.
📊 Chunking Specifications
The dataset employs a spatio-temporal chunking scheme of 75 days × 37,5° latitude × 70° longitude. This corresponds to an array chunk shape of 75 (valid_time) × 150 (latitude) × 300 (longitude).
How to download the data
The default (and preferred) way to access the data requires accessing the api.earthdatahub.destine.eu domain and a valid API key.
Method 1: quick access
It is possible to include the token directly in the URL.
1import xarray as xr 2 3xr.open_dataset( 4 "https://edh:<your personal access token>@api.earthdatahub.destine.eu/era5/era5-single-levels-atmosphere-daily-utc-v0.zarr", 5 chunks={}, 6 engine="zarr", 7 zarr_format=3, 8)
Method 2: advanced access
The Python snippet gather the token from a netrc file.
1import xarray as xr 2 3xr.open_dataset( 4 "https://api.earthdatahub.destine.eu/era5/era5-single-levels-atmosphere-daily-utc-v0.zarr", 5 storage_options={"client_kwargs":{"trust_env":True}}, 6 chunks={}, 7 engine="zarr", 8 zarr_format=3, 9)
Variables
| Short Name | Units | Description |
|---|---|---|
blh | m | Boundary layer height |
cape | J kg-1 | Convective available potential energy |
d2m | K | 2 metre dewpoint temperature |
ie | kg m-2 s-1 | Instantaneous moisture flux |
iews | N m-2 | Instantaneous eastward turbulent surface stress |
inss | N m-2 | Instantaneous northward turbulent surface stress |
ishf | W m-2 | Instantaneous surface sensible heat net flux |
msl | Pa | Mean sea level pressure |
sd | m of water equivalent | Snow depth |
skt | K | Skin temperature |
sst | K | Sea surface temperature |
t2m | K | 2 metre temperature |
tcc | (0 - 1) | Total cloud cover |
u10 | m s-1 | 10 metre U wind component |
u100 | m s-1 | 100 metre U wind component |
v10 | m s-1 | 10 metre V wind component |
v100 | m s-1 | 100 metre V wind component |
z | m2 s-2 | Geopotential |