gsw_CT_maxdensity

Conservative Temperature of maximum density of seawater
(75-term equation)

Contents

USAGE:

CT_maxdensity = gsw_CT_maxdensity(SA,p)

DESCRIPTION:

Calculates the Conservative Temperature of maximum density of seawater.
This function returns the Conservative Temperature at which the density
of seawater is a maximum, at given Absolute Salinity, SA, and sea 
pressure, p (in dbar).  This function uses the computationally-
efficient 75-term expression for specific volume in terms of SA, 
CT and p (Roquet et al., 2015).
Note that the 75-term equation has been fitted in a restricted range of 
parameter space, and is most accurate inside the "oceanographic funnel" 
described in  McDougall et al. (2003).  The GSW library function 
"gsw_infunnel(SA,CT,p)" is avaialble to be used if one wants to test if 
some of one's data lies outside this "funnel".
TEOS-10 
Click for a more detailed description of calculating the
Conservative Temperature of maximum density.

INPUT:

SA =  Absolute Salinity                                         [ g/kg ]
p  =  sea pressure                                              [ dbar ]
      ( i.e. absolute pressure - 10.1325 dbar )
p may have dimensions 1x1 or Mx1 or 1xN or MxN, where SA is MxN.

OUTPUT:

CT_maxdensity  =  Conservative Temperature at which the density of
                  seawater is a maximum for given Absolute Salinity
                  and pressure.                                [ deg C ]

EXAMPLE:

SA = [34.7118; 34.8915; 35.0256; 34.8472; 34.7366; 34.7324;]
p =  [     10;      50;     125;     250;     600;    1000;]
CT_maxdensity = gsw_CT_maxdensity(SA,p)
CT_maxdensity =
  -3.731407240089855
  -3.861137427731664
  -4.060390602245942
  -4.306222571955388
  -5.089240667106197
  -6.028034316992341

AUTHOR:

Trevor McDougall & 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 section 3.42 of this TEOS-10 Manual.
McDougall, T.J., D.R. Jackett, D.G. Wright and R. Feistel, 2003: 
 Accurate and computationally efficient algorithms for potential 
 temperature and density of seawater.  J. Atmosph. Ocean. Tech., 20,
 pp. 730-741.
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