Access to ARCO data is programmatic; therefore, users of these resources and this documentation are expected to have some relevant programming experience.

import xarray as xr

# Geo-chunked data for access optimised along the time dimension (e.g. for time-series at a single point)
# Surface
geo_url = "https://arco.datastores.ecmwf.int/cadl-arco-geo-045/arco/reanalysis_cerra_land/surface/geoChunked.zarr"

# Time-chunked data for access optimised along the time dimension (e.g. for short-time period for large areas)
# Surface
time_url = "https://arco.datastores.ecmwf.int/cadl-arco-time-045/arco/reanalysis_cerra_land/surface/timeChunked.zarr"

# Open one of the Zarr objects with xarray, the default example opens the geo-chunked surface variables
ds = xr.open_zarr(
    surface_geo_url,
    consolidated=True,
    storage_options={
        "headers": {"Authorization": f"Bearer <CDS-API-KEY>"}
    }
)

# Inspect the variables
print(ds)