Contents
USAGE:
[Sstar, in_ocean] = gsw_Sstar_from_SP(SP,p,long,lat)
DESCRIPTION:
Calculates Preformed Salinity from Practical Salinity.
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 ]
p, lat and long may have dimensions 1x1 or Mx1 or 1xN or MxN,
where SP is MxN.
OUTPUT:
Sstar = Preformed Salinity [ g/kg ]
in_ocean = 0, if long and lat are a long way from the ocean
= 1, if long and lat are in the ocean
Note. This flag is only set when the observation is well and truly on
dry land; often the warning flag is not set until one is several
hundred kilometres inland from the coast.
EXAMPLE:
SP = [34.5487; 34.7275; 34.8605; 34.6810; 34.5680; 34.5600;]
p = [ 10; 50; 125; 250; 600; 1000;]
lat = [ 4; 4; 4; 4; 4; 4;]
long = [ 188; 188; 188; 188; 188; 188;]
If the profile data refers to one location (one station) is it
acceptable to enter the station location once.
(i.e. the following will produce the same result as the input above).
SP = [34.5487; 34.7275; 34.8605; 34.6810; 34.5680; 34.5600;]
p = [ 10; 50; 125; 250; 600; 1000;]
lat = 4;
long = 188;
[Sstar, in_ocean] = gsw_Sstar_from_SP(SP,p,long,lat)
Sstar = in_ocean =
34.711553680880769 1
34.891161395333754 1
35.024650265047370 1
34.843593141519356 1
34.729033995955525 1
34.719675962471783 1
AUTHOR:
Paul Barker & Trevor McDougall [ help@teos-10.org ]
VERSION NUMBER:
3.01 (23rd May, 2011)
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 2.5 and appendices A.4 and A.5 of this TEOS-10 Manual.
McDougall, T.J., D.R. Jackett and F.J. Millero, 2010: An algorithm
for estimating Absolute Salinity in the global ocean. Submitted to
Ocean Science. A preliminary version is available at Ocean Sci. Discuss.,
6, 215-242.
http://www.ocean-sci-discuss.net/6/215/2009/osd-6-215-2009-print.pdf
The software is available from http://www.TEOS-10.org
