polaris.ocean.init_state.pressure_for_tracer_conversion

polaris.ocean.init_state.pressure_for_tracer_conversion(ds: Dataset, config: PolarisConfigParser, logger: Logger | None = None) → DataArray[source]

Get the sea (gauge) pressure at layer midpoints used to convert tracers between the TEOS-10 and MPAS-Ocean conventions.

If ds already contains a pressure field (as p-star initial conditions do), it is returned unchanged. Otherwise, the pressure is computed from layerThickness, the tracers and the surface pressure (SurfacePressure if present and zero if not).

Since the pressure only enters the conversion through the absolute- to-practical salinity correction, it does not need to be particularly accurate; see polaris.ocean.eos.convert_tracers().

Parameters:

ds (xarray.Dataset) – A dataset with either pressure or layerThickness, temperature and salinity.
config (polaris.config.PolarisConfigParser) – Configuration options with parameters defining the equation of state.
logger (logging.Logger, optional) – A logger for logging EOS iteration information.

Returns:

xarray.DataArray – The gauge pressure at layer midpoints (Pa).