First Derivatives of Conservative Temperature for Freezing Water
gsw_CT_freezing_first_derivatives(SA, p, saturation_fraction = 1)
Absolute Salinity [ g/kg ]
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar
fraction of air in water [unitless]
A list containing
CTfreezing_SA [ K/(g/kg) ], the derivative of
Conservative Temperature with respect to Absolute Salinity at constant
potential temperature, and
CTfreezing_p [ unitless], the derivative of
Conservative Temperature with respect to pressure at constant
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
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.
SA <- c( 34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324) p <- c( 10, 50, 125, 250, 600, 1000) saturation_fraction <- c( 1, 0.8, 0.6, 0.5, 0.4, 0) r <- gsw_CT_freezing_first_derivatives(SA, p, saturation_fraction) stopifnot(all.equal(r$CTfreezing_SA, c(-0.058193253897272, -0.058265158334170, -0.058345661671901, -0.058373842446463, -0.058534544740846, -0.058730846361252))) stopifnot(all.equal(r$CTfreezing_p/1e-7, c(-0.765300390432684, -0.766942996466485, -0.769892679988284, -0.774561011527902, -0.787769143040504, -0.802771548245855)))
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.