Contents
USAGE:
spiciness0 = spiciness0(SA,CT)
DESCRIPTION:
Calculates spiciness from Absolute Salinity and Conservative
Temperature at a pressure of 0 dbar, as described by McDougall and
Krzysik (2015). This routine is based on the computationally-efficient
expression for specific volume in terms of SA, CT and p (Roquet et al.,
2015).
Note that this 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".
INPUT:
SA = Absolute Salinity [ g/kg ]
CT = Conservative Temperature [ deg C ]
SA & CT need to have the same dimensions.
OUTPUT:
spiciness = spiciness referenced to a pressure of 0 dbar,
i.e. the surface
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;]
spiciness0 = gsw_spiciness0(SA,CT)
spiciness0 =
5.728998558542941
5.749940496782486
4.163547112671111
1.069362556641764
0.426428274444305
0.089725188494086
AUTHOR:
Oliver Krzysik and Trevor McDougall [ 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.
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.
McDougall, T.J., and O.A. Krzysik, 2015: Spiciness. Journal of
Marine Research, 73, 141-152.
Roquet, F., G. Madec, T.J. McDougall and P.M. Barker, 2015: Accurate
polynomial expressions for the density and specific volume of seawater
using the TEOS-10 standard. Ocean Modelling, 90, pp. 29-43.
http://dx.doi.org/10.1016/j.ocemod.2015.04.002
The software is available from http://www.TEOS-10.org