# gsw_beta_CT_exact

    saline contraction coefficient at constant
    Conservative Temperature.

## Contents

- USAGE:
- DESCRIPTION:
- INPUT:
- OUTPUT:
- EXAMPLE:
- AUTHOR:
- VERSION NUMBER:
- REFERENCES:

## USAGE:

    beta_CT_exact = gsw_beta_CT_exact(SA,CT,p)

## DESCRIPTION:

    Calculates the saline (i.e. haline) contraction coefficient of seawater
    at constant Conservative Temperature.

    Note that this function uses the full Gibbs function.  There is an
    alternative to calling this function, namely gsw_beta(SA,CT,p),
    which uses the computationally efficient 48-term expression for density
    in terms of SA, CT and p (McDougall et al., 2013).

    Click for a more detailed description of the saline
    contraction coefficient at constant Conservative
    Temperature.

## 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:

    beta_CT_exact  =  saline contraction coefficient                  [ kg/g ]
                      at constant Conservative Temperature

## 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;]

    beta_CT_exact = gsw_beta_CT_exact(SA,CT,p)

    beta_CT_exact =

    1.0e-003 *

       0.717524805987739
       0.717657492034394
       0.726177115604472
       0.750429402810300
       0.754913922492702
       0.756856584585433

## AUTHOR:

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

## VERSION NUMBER:

    3.02 (17th November, 2012)

## 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. (2.19.3) of this TEOS-10 manual.

    McDougall T.J., P.M. Barker, R. Feistel and D.R. Jackett, 2013:  A
      computationally efficient 48-term expression for the density of
      seawater in terms of Conservative Temperature, and related properties
      of seawater.  To be submitted to J. Atm. Ocean. Technol., xx, yyy-zzz.

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