gsw_cp_t_exact: Isobaric heat capacity

View source: R/gsw.R

gsw_cp_t_exactR Documentation

Isobaric heat capacity


Isobaric heat capacity


gsw_cp_t_exact(SA, t, p)



Absolute Salinity [ g/kg ]


in-situ temperature (ITS-90) [ degC ]


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


heat capacity [ J/(kg*K) ]

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.



SA <- c(34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324)
t <-  c(28.7856, 28.4329, 22.8103, 10.2600,  6.8863,  4.4036)
p <-  c(     10,      50,     125,     250,     600,    1000)
cp_t_exact <- gsw_cp_t_exact(SA, t, p)
stopifnot(all.equal(cp_t_exact/1e3, c(4.002888003958537, 4.000980283927373, 3.995546468894633,
                                      3.985076769021370, 3.973593843482723, 3.960184084786622)))

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