gsw_specvol_anom_CT25

specific volume anomaly (25-term equation)

Contents

USAGE:

[specvol_anom_CT25, in_funnel] = gsw_specvol_anom_CT25(SA,CT,p)

DESCRIPTION:

Calculates specific volume anomaly from Absolute Salinity, Conservative
Temperature and pressure.  It uses the computationally-efficient 25-term
expression for density as a function of SA, CT and p (McDougall et al.,
2010).  The reference value of Absolute Salinity is SSO and the
reference value of Conservative Temperature is equal to 0 degress C.
TEOS-10
Click for a more detailed description of specific
volume anomaly.

INPUT:

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

specvol_anom_CT25  =  specific volume anomaly                [ kg m^-3 ]
in_funnel          =  0, if SA, CT and p are outside the "funnel"
                   =  1, if SA, CT and p are inside the "funnel"
Note. The term "funnel" describes the range of SA, CT and p over which
  the error in the fit of the computationally-efficient 25-term
  expression for density was calculated (McDougall et al., 2010).

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;]
[specvol_anom_CT25, in_funnel] = gsw_specvol_anom_CT25(SA,CT,p)
specvol_anom_CT25 =          in_funnel =
 1.0e-005 *
  0.600921244780790              1
  0.578505932118849              1
  0.405538759163434              1
  0.141863283479346              1
  0.104119730440851              1
  0.076279577097848              1

AUTHOR:

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

VERSION NUMBER:

2.0 (26th August, 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. (3.7.3) of this TEOS-10 Manual.
McDougall T. J., D. R. Jackett, P. M. Barker, C. Roberts-Thomson, R.
 Feistel and R. W. Hallberg, 2010:  A computationally efficient 25-term
 expression for the density of seawater in terms of Conservative
 Temperature, and related properties of seawater.  To be submitted
 to Ocean Science Discussions.
The software is available from http://www.TEOS-10.org