gsw (version 1.0-5)

gsw_SP_from_Sstar: Practical Salinity from Preformed Salinity

Description

Practical Salinity from Preformed Salinity

Usage

gsw_SP_from_Sstar(Sstar, p, longitude, latitude)

Arguments

Sstar

Preformed Salinity [ g/kg ]

p

sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar

longitude

longitude in decimal degrees, positive to the east of Greenwich. (This is called long in the TEOS-10 Matlab code.)

latitude

latitude in decimal degrees, positive to the north of the equator. (This is called lat in the TEOS-10 Matlab code.)

Value

Practical Salinity (PSS-78) [ unitless ]

Details

The present R function works with a wrapper to a C function contained within the GSW-C system (Version 3.05-4 dated 2017-08-07, available at https://github.com/TEOS-10/GSW-C, as git commit '5b4d959e54031f9e972f3e863f63e67fa4f5bfec'), which stems from the GSW-Fortran system (https://github.com/TEOS-10/GSW-Fortran) which in turn stems from the GSW-Matlab system (https://github.com/TEOS-10/GSW-Matlab). Consult http://www.teos-10.org to learn more about these software systems, their authorships, and the science behind it all.

References

http://www.teos-10.org/pubs/gsw/html/gsw_SP_from_Sstar.html

See Also

Other things related to salinity: gsw_C_from_SP, gsw_SA_from_SP_Baltic, gsw_SA_from_SP, gsw_SA_from_Sstar, gsw_SP_from_C, gsw_SP_from_SA, gsw_SP_from_SK, gsw_SP_from_SR, gsw_SR_from_SP, gsw_Sstar_from_SA, gsw_Sstar_from_SP, gsw_deltaSA_from_SP

Examples

# NOT RUN {
Sstar <- c(34.7115, 34.8912, 35.0247, 34.8436, 34.7291, 34.7197)
p <- c(         10,      50,     125,     250,     600,    1000)
longitude <- 188
latitude <- 4
SP <- gsw_SP_from_Sstar(Sstar, p, longitude, latitude)
expect_equal(SP, c(34.548646570969929, 34.727538423586189, 34.860549501859502,
                   34.681006826476434, 34.568065697992346, 34.560023926979518))
# }