data_vars ["z0a"]

z0a

alt_names	'z0'
name	None
cmap	None
squeeze	None
search_order	'sn'
add_loc	False

["attrs"]

standard_name	'air_surface_roughness_length' 'surface_roughness_length' 'roughness_length'
long_name	'Air roughness length'
units	'm'

["select"]

Empty dictionary