gsw_CT_from_entropy: Conservative Temperature from Entropy

View source: R/gsw.R

gsw_CT_from_entropyR Documentation

Conservative Temperature from Entropy


Conservative Temperature from Entropy


gsw_CT_from_entropy(SA, entropy)



Absolute Salinity [ g/kg ]


specific entropy [ J/(degC*kg) ]


Conservative Temperature [ degC ]

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 entropy: gsw_entropy_first_derivatives(), gsw_entropy_from_pt(), gsw_entropy_from_t(), gsw_entropy_ice(), gsw_pt_from_entropy()


SA <- c(      34.7118,  34.8915,  35.0256,  34.8472, 34.7366, 34.7324)
entropy <- c(400.3892, 395.4378, 319.8668, 146.7910, 98.6471, 62.7919)
CT <- gsw_CT_from_entropy(SA, entropy)
stopifnot(all.equal(CT, c(28.809902787278070, 28.439199226786918, 22.786199266954270,
                          10.226197672488652, 6.827196739780282, 4.323602945446461)))

gsw documentation built on Oct. 16, 2022, 5:06 p.m.