Calculate seawater spiciness referenced to 1000 dbar.

gsw_spiciness1(SA, CT)



Absolute Salinity [ g/kg ]


Conservative Temperature [ degC ]


spiciness [ kg/m^3 ]

Implementation Note

This R function uses a wrapper to a C function contained within the GSW-C system as updated 2021-12-28 at 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 website. Therefore, in the interests of making GSW-R be self-contained, a copy was downloaded from on 2022-05-25, the .mat file was stored in the developer/create_data directory of, and then the dataset used in GSW-R was created based on that .mat file.

Please consult to learn more about the various TEOS-10 software systems.

See also

Other things related to spiciness: gsw_spiciness0(), gsw_spiciness2()


SA <- c(34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324)
CT <- c(28.8099, 28.4392, 22.7862, 10.2262,  6.8272,  4.3236)
spiciness <- gsw_spiciness1(SA, CT)
stopifnot(all.equal(spiciness, c(6.311038322123224, 6.326411175472160, 4.667218659743284,
                                 1.351722468726905, 0.628494082166029, 0.224779784908478)))