namespace mom_eos_unesco

Overview

The equation of state using the Jackett and McDougall fits to the UNESCO EOS. More…

namespace mom_eos_unesco {

// interfaces

interface calculate_density_unesco;
interface calculate_spec_vol_unesco;

// global functions

subroutine, public calculate_density_scalar_unesco(T T, S S, pressure pressure, rho rho, rho_ref rho_ref);

subroutine, public calculate_density_array_unesco(
    T T,
    S S,
    pressure pressure,
    rho rho,
    start start,
    npts npts,
    rho_ref rho_ref
    );

subroutine, public calculate_density_derivs_unesco(
    T T,
    S S,
    pressure pressure,
    drho_dT drho_dT,
    drho_dS drho_dS,
    start start,
    npts npts
    );

subroutine, public calculate_compress_unesco(
    T T,
    S S,
    pressure pressure,
    rho rho,
    drho_dp drho_dp,
    start start,
    npts npts
    );

} // namespace mom_eos_unesco

Detailed Documentation

The equation of state using the Jackett and McDougall fits to the UNESCO EOS.

Global Functions

subroutine, public calculate_density_scalar_unesco(
    T T,
    S S,
    pressure pressure,
    rho rho,
    rho_ref rho_ref
    )

This subroutine computes the in situ density of sea water (rho in [kg m-3]) from salinity (S [PSU]), potential temperature (T [degC]), and pressure [Pa], using the UNESCO (1981) equation of state.

Parameters:

t	Potential temperature relative to the surface [degC].
s	Salinity [PSU].
pressure	pressure [Pa].
rho	In situ density [kg m-3].
rho_ref	A reference density [kg m-3].

subroutine, public calculate_density_array_unesco(
    T T,
    S S,
    pressure pressure,
    rho rho,
    start start,
    npts npts,
    rho_ref rho_ref
    )

This subroutine computes the in situ density of sea water (rho in [kg m-3]) from salinity (S [PSU]), potential temperature (T [degC]), and pressure [Pa], using the UNESCO (1981) equation of state.

Parameters:

t	potential temperature relative to the surface [degC].
s	salinity [PSU].
pressure	pressure [Pa].
rho	in situ density [kg m-3].
start	the starting point in the arrays.
npts	the number of values to calculate.
rho_ref	A reference density [kg m-3].

subroutine, public calculate_density_derivs_unesco(
    T T,
    S S,
    pressure pressure,
    drho_dT drho_dT,
    drho_dS drho_dS,
    start start,
    npts npts
    )

This subroutine calculates the partial derivatives of density with potential temperature and salinity.

Parameters:

t	Potential temperature relative to the surface [degC].
s	Salinity [PSU].
pressure	Pressure [Pa].
drho_dt	The partial derivative of density with potential temperature [kg m-3 degC-1].
drho_ds	The partial derivative of density with salinity, in [kg m-3 PSU-1].
start	The starting point in the arrays.
npts	The number of values to calculate.

subroutine, public calculate_compress_unesco(
    T T,
    S S,
    pressure pressure,
    rho rho,
    drho_dp drho_dp,
    start start,
    npts npts
    )

This subroutine computes the in situ density of sea water (rho) and the compressibility (drho/dp == C_sound^-2) at the given salinity, potential temperature, and pressure.

Parameters:

t	Potential temperature relative to the surface [degC].
s	Salinity [PSU].
pressure	Pressure [Pa].
rho	In situ density [kg m-3].
drho_dp	The partial derivative of density with pressure (also the inverse of the square of sound speed) [s2 m-2].
start	The starting point in the arrays.
npts	The number of values to calculate.