Conservative Temperature from Density, Absolute Salinity and Pressure

gsw_CT_from_rho(rho, SA, p)

Arguments

rho: seawater density [ kg/m^3 ]
SA: Absolute Salinity [ g/kg ]
p: sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar

Value

A list containing two estimates of Conservative Temperature: CT and CT_multiple, each in [ 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 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_CT_from_rho.html

Other things related to density: gsw_CT_maxdensity(), gsw_SA_from_rho(), gsw_alpha_on_beta(), gsw_alpha_wrt_t_exact(), gsw_alpha_wrt_t_ice(), gsw_alpha(), gsw_beta_const_t_exact(), gsw_beta(), gsw_pot_rho_t_exact(), gsw_rho_alpha_beta(), gsw_rho_first_derivatives_wrt_enthalpy(), gsw_rho_first_derivatives(), gsw_rho_ice(), gsw_rho_t_exact(), gsw_rho(), gsw_sigma0(), gsw_sigma1(), gsw_sigma2(), gsw_sigma3(), gsw_sigma4(), gsw_specvol_alpha_beta(), gsw_specvol_anom_standard(), gsw_specvol_ice(), gsw_specvol_t_exact(), gsw_specvol()

Examples

rho <- c(1021.8484, 1022.2647, 1024.4207, 1027.7841, 1029.8287, 1031.9916)
SA <- c(   34.7118,   34.8915,   35.0256,   34.8472,   34.7366,   34.7324)
p <- c(         10,        50,       125,       250,       600,      1000)
r <- gsw_CT_from_rho(rho, SA, p)
stopifnot(all.equal(r$CT, c(28.784377302226968, 28.432402127485858, 22.808745445250068,
                            10.260169334807866, 6.887336649146716, 4.404594162282834)))