## Contents

## USAGE:

sound_speed_CT_exact = gsw_sound_speed_CT_exact(SA,CT,p)

## DESCRIPTION:

Calculates the speed of sound in seawater.

Note that this function uses the full Gibbs function. There is an
alternative to calling this function, namely gsw_sound_speed(SA,CT,p),
which uses the computationally efficient 75-term expression for specific
volume in terms of SA, CT and p (Roquet et al., 2015).

## INPUT:

SA = Absolute Salinity [ g/kg ]
CT = Conservative Temperature (ITS-90) [ deg C ]
p = sea pressure [ dbar ]
( i.e. absolute pressure - 10.1325 dbar )

SA & CT need to have the same dimensions.
p may have dimensions 1x1 or Mx1 or 1xN or MxN, where SA & CT are MxN.

## OUTPUT:

sound_speed_CT_exact = speed of sound in seawater [ m/s ]

## EXAMPLE:

SA = [34.7118; 34.8915; 35.0256; 34.8472; 34.7366; 34.7324;]
CT = [28.7856; 28.4329; 22.8103; 10.2600; 6.8863; 4.4036;]
p = [ 10; 50; 125; 250; 600; 1000;]

sound_speed_CT_exact = gsw_sound_speed_CT_exact(SA,CT,p)

sound_speed_CT_exact =

1.0e+003 *

1.542563864078558
1.542689879196941
1.530906501030040
1.494531202378831
1.487608409464569
1.484268813221961

## AUTHOR:

Paul Barker and Trevor McDougall. [ help@teos-10.org ]

## VERSION NUMBER:

3.05 (16th February, 2015)

## REFERENCES:

IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of
seawater - 2010: Calculation and use of thermodynamic properties.
Intergovernmental Oceanographic Commission, Manuals and Guides No. 56,
UNESCO (English), 196 pp. Available from the TEOS-10 web site.
See Eqn. (2.17.1) of this TEOS-10 Manual.

Roquet, F., G. Madec, T.J. McDougall, P.M. Barker, 2015: Accurate
polynomial expressions for the density and specifc volume of seawater
using the TEOS-10 standard. Ocean Modelling.

The software is available from http://www.TEOS-10.org