# ``sigma0`` ## Properties :dimensions: N_PROF, N_LEVELS :dtype: float64 ## Default Attributes | Attribute | Value | |-----|-----| |``whp_name`` | ``SIG0`` | |``whp_unit`` | ``KG/M^3`` | |``standard_name`` | ``sea_water_sigma_theta`` | |``units`` | ``kg m-3`` | |``C_format`` | ``%9.4f`` | |``C_format_source`` | ``database`` | ## Description Potential density anomaly referenced to 0 dbar (ocean surface)