ERA5-Land daily data

Name: ERA5-Land daily data - Earth Data Hub
Creator: ECMWF

This dataset is a curated subset of daily averages derived from ECMWF’s ERA5-Land hourly data from 1950 to present. It is produced by the Earth Data Hub Team based on the hourly ERA5-Land hourly data. 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 × 15° latitude × 30° 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-land-daily-utc-v1.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.

It's required to before running the code snippet below.

1import xarray as xr
2
3xr.open_dataset(
4    "https://api.earthdatahub.destine.eu/era5/era5-land-daily-utc-v1.zarr",
5    storage_options={"client_kwargs":{"trust_env":True}},
6    chunks={},
7    engine="zarr",
8    zarr_format=3,
9)

Variables

Short Name	Units	Description
d2m	K	2 metre dewpoint temperature
e	m of water equivalent	Evaporation
pev	m	Potential evaporation
ro	m	Runoff
sp	Pa	Surface pressure
ssr	J m^-2	Surface net short-wave (solar) radiation
ssrd	J m^-2	Surface short-wave (solar) radiation downwards
str	J m^-2	Surface net long-wave (thermal) radiation
swvl1	m³ m^-3	Volumetric soil water layer 1
swvl2	m³ m^-3	Volumetric soil water layer 2
t2m	K	2 metre temperature
tp	m	Total precipitation
u10	m s^-1	10 metre U wind component
v10	m s^-1	10 metre V wind component