Absolute Salinity Anomaly from Practical Salinity
gsw_deltaSA_from_SP(SP, p, longitude, latitude)Practical Salinity (PSS-78) [ unitless ]
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar
longitude in decimal degrees, positive to the east of Greenwich. (This
is called long in the TEOS-10 Matlab code.)
latitude in decimal degrees, positive to the north of the equator. (This
is called lat in the TEOS-10 Matlab code.)
deltaSA Absolute Salinity Anomaly [ g/kg ]
This R function uses a wrapper to a C function contained within the GSW-C system as updated 2021-12-28 at https://github.com/TEOS-10/GSW-C with git commit `98f0fd40dd9ceb0ba82c9d47ac750e935a7d0459`.
The C function uses data from the library/gsw_data_v3_0.mat
file provided in the GSW-Matlab source code, version 3.06-11.
Unfortunately, this version of the mat file is no longer displayed on the
TEOS-10.org website. Therefore, in the interests of making GSW-R be
self-contained, a copy was downloaded from
http://www.teos-10.org/software/gsw_matlab_v3_06_11.zip on 2022-05-25,
the .mat file was stored in the developer/create_data directory of
https://github.com/TEOS-10/GSW-R, and then the dataset used in GSW-R
was created based on that .mat file.
Please consult http://www.teos-10.org to learn more about the various TEOS-10 software systems.
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_SA(),
gsw_Sstar_from_SP()
SP = 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)
deltaSA = gsw_deltaSA_from_SP(SP,p,long,lat)
stopifnot(all.equal(deltaSA, c(0.000167203365230, 0.000268836122231, 0.000665803155705,
0.002706154619403, 0.005652977406832, 0.009444734661606)))