Convert from Absolute Salinity to Preformed Salinity
Calculate Preformed Salinity from Absolute Salinity, pressure, longitude, and latitude.
gsw_Sstar_from_SA(SA, p, longitude, latitude)
SA |
Absolute 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 |
latitude |
latitude in decimal degrees, positive to the north of the equator. (This
is called |
If SA is a matrix and if its dimensions correspond to the
lengths of longitude and latitude, then the latter are
converted to analogous matrices with expand.grid.
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.
Preformed Salinity [ g/kg ]
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_SP_from_Sstar,
gsw_SR_from_SP,
gsw_Sstar_from_SP,
gsw_deltaSA_from_SP
SA <- c(34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324)
p <- c( 10, 50, 125, 250, 600, 1000)
lat <- c( 4, 4, 4, 4, 4, 4)
long <- c( 188, 188, 188, 188, 188, 188)
Sstar <- gsw_Sstar_from_SA(SA,p,long,lat)
expect_equal(Sstar, c(34.711575335926490, 34.891138777337822, 35.024705401162166,
34.843564118358302, 34.729005527604883, 34.719712883389462))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.