# gsw_rho_CT

    In-situ density

## Contents

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

## USAGE:

    rho_CT = gsw_rho_CT(SA,CT,p)

## DESCRIPTION:

    Calculates in-situ density from Absolute Salinity and Conservative
    Temperature.

    Note that potential density with respect to reference pressure, pr, is
    obtained by calling this function with the pressure argument being pr
    (i.e. "gsw_rho_CT(SA,CT,pr)").

    Note that this function uses the full Gibbs function.  There is an
    alternative to calling this function, namely gsw_rho_CT25(SA,CT,p),
    which uses the computationally efficient 25-term expression for density
    in terms of SA, CT and p (McDougall et al., (2010)).  For SA, CT and p
    values which fall inside the oceanographic "funnel" (McDougall et al.,
    2010), this computationally efficient (i. e. faster) 25-term version
    fits the underlying laboratory density data almost as well as does the
    density derived from the full TEOS-10 Gibbs function.

    Click for a more detailed description of density.

## INPUT:

    SA  =  Absolute Salinity                                        [ g/kg ]
    CT  =  Conservative Temperature                                [ 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:

    rho_CT   =  in-situ density                                  [ kg m^-3 ]

## EXAMPLE:

    SA = [34.7118; 34.8915; 35.0256; 34.8472; 34.7366; 34.7324;]
    CT = [28.8099; 28.4392; 22.7862; 10.2262;  6.8272;  4.3236;]
    p =  [     10;      50;     125;     250;     600;    1000;]

    rho_CT = gsw_rho_CT(SA,CT,p)

    rho_CT =

    1.0e+003 *

     1.021840179764021
     1.022262699103554
     1.024427709285783
     1.027790199901620
     1.029837716779620
     1.032002400877215

## AUTHOR:

    Trevor McDougall and Paul Barker  [ help_gsw@csiro.au ]

## VERSION NUMBER:

    2.0 (23rd July, 2010)

## 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. (2.8.2) of this TEOS-10 Manual.

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