# gsw_spiciness2

    spiciness at p = 2000 dbar (75-term equation)

## Contents

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

## USAGE:

    spiciness2 = spiciness2(SA,CT)

## DESCRIPTION:

    Calculates spiciness from Absolute Salinity and Conservative
    Temperature at a pressure of 2000 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 2000 dbar

## 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;]

    spiciness2 = gsw_spiciness2(SA,CT)

    spiciness2 =

       6.874671751873180
       6.884616399155135
       5.154458892387083
       1.624327800598636
       0.823490797424952
       0.355069307641827

## 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