gsw_beta
saline contraction coefficient at constant
Conservative Temperature. (48-term equation)
Contents
USAGE:
beta = gsw_beta(SA,CT,p)
DESCRIPTION:
Calculates the saline (i.e. haline) contraction coefficient of seawater
at constant Conservative Temperature using the computationally-efficient
48-term expression for density in terms of SA, CT and p (IOC et al., 2010).
Note that the 48-term equation has been fitted in a restricted range of
parameter space, and is most accurate inside the "oceanographic funnel"
described in IOC et al. (2010). 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".
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 = 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 = gsw_beta(SA,CT,p)
beta =
1.0e-003 *
0.717580024283098
0.717712392082254
0.726221642634641
0.750510976803418
0.755001726838233
0.756941554699334
AUTHOR:
Paul Barker and Trevor McDougall [ help@teos-10.org ]
VERSION NUMBER:
3.04 (10th December, 2013)
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.
The software is available from http://www.TEOS-10.org