Use a default fill_value of NaN for floats in Zarr v3 #10757
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Zarr stores written with Xarray now consistently use a default Zarr fill value
of ``NaN`` for float variables, for both Zarr v2 and v3. All
other dtypes still use the Zarr default ``fill_value`` of zero. To customize,
explicitly set encoding in :py:meth:`~Dataset.to_zarr`, e.g.,
``encoding=dict.fromkey(ds.data_vars, {'fill_value': 0})``.
Fixes pydata#10646
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Zarr stores written with Xarray now consistently use a default Zarr fill value of
NaNfor float variables, for both Zarr v2 and v3. All other dtypes still use the Zarr defaultfill_valueof zero. To customize, explicitly set encoding inDataset.to_zarr, e.g.,encoding=dict.fromkey(ds.data_vars, {'fill_value': 0}).Fixes #10646
whats-new.rst