## Contents

## USAGE:

kappa_CT_exact = gsw_kappa_CT_exact(SA,CT,p)

## DESCRIPTION:

Calculates the isentropic compressibility of seawater.

Note that this function uses the full Gibbs function. There is an
alternative to calling this function, namely gsw_kappa(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 ]
( ie. 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:

kappa_CT_exact = Isentropic compressibility [ 1/Pa ]
Note. The output units are 1/Pa not 1/dbar.

## 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;]

kappa_CT_exact = gsw_kappa_CT_exact(SA,CT,p)

kappa_CT_exact =

1.0e-009 *

0.411270246802426
0.411035509242423
0.416508906214161
0.435600228143483
0.438791008004861
0.439844007211844

## AUTHOR:

Trevor McDougall and Paul Barker [ 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 Eqns. (2.16.1) and the row for kappa in Table P.1 of appendix P
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