Thermobaric coefficient (75-term equation)

gsw_thermobaric(SA, CT, p)

Arguments

SA: Absolute Salinity [ g/kg ]
CT: Conservative Temperature [ degC ]
p: sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar

Value

thermobaric coefficient wrt Conservative Temperature [ 1/(K Pa) ]

Implementation Note

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.

References

http://www.teos-10.org/pubs/gsw/html/gsw_thermobaric.html

Examples

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)
p <-  c(     10,      50,     125,     250,     600,    1000)

tb <- gsw_thermobaric(SA, CT, p)

stopifnot(all.equal(tb*1e11,
        c(0.141342632944971, 0.142352284525832, 0.163216280125501,
            0.226030772122855, 0.246185239871747, 0.261474794884197)))