# gsw_deltaSA_from_SP

    Absolute Salinity Anomaly from Practical Salinity

## Contents

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

## USAGE:

    delta_SA = gsw_deltaSA_from_SP(SP,p,long,lat)

## DESCRIPTION:

    Calculates the Absolute Salinity Anomaly from Practical Salinity.

    Click for a more detailed description of the
    Absolute Salinity Anomaly.

## INPUT:

    SP   =  Practical Salinity  (PSS-78)                        [ unitless ]
    p     =  sea pressure                                           [ dbar ]
             ( i.e. absolute pressure - 10.1325 dbar )
    long  =  longitude in decimal degrees                     [ 0 ... +360 ]
                                                        or [ -180 ... +180 ]
    lat   =  latitude in decimal degrees north               [ -90 ... +90 ]

    SP, p, long & lat need to have the same dimensions.

## OUTPUT:

    deltaSA  =  Absolute Salinity Anomaly                          [ g/kg ]

## EXAMPLE:

    SP =   [34.7118; 34.8915; 35.0256; 34.8472; 34.7366; 34.7324;]
    p =    [     10;      50;     125;     250;     600;    1000;]
    lat =  [      4;       4;       4;       4;       4;       4;]
    long = [    188;     188;     188;     188;     188;     188;]

    deltaSA = gsw_deltaSA_from_SP(SP,p,long,lat)

    deltaSA =              in_ocean =

      0.000167203365230       1
      0.000268836122231       1
      0.000665803155705       1
      0.002706154619403       1
      0.005652977406832       1
      0.009444734661606       1

## AUTHOR:

    Trevor McDougall and 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 http://www.TEOS-10.org
      See section 2.5 of this TEOS-10 Manual.

    McDougall, T.J., D.R. Jackett, F.J. Millero, R. Pawlowicz and
     P.M. Barker, 2012: A global algorithm for estimating Absolute Salinity.
     Ocean Science, 8, 1123-1134.
      http://www.ocean-sci.net/8/1123/2012/os-8-1123-2012.pdf

    The software is available from http://www.TEOS-10.org