Derivative of Chemical Potential of Water in Seawater wrt Temperature
Absolute Salinity [ g/kg ]
in-situ temperature (ITS-90) [ degC ]
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar
derivative [ J/(g*degC) ]
This R function uses a wrapper to a C function
contained within the GSW-C system as updated 2021-03-27
with git commit 'f7bfebf44f686034636facb09852f1d5760c27f5'.
In turn, that C function uses data from the
file provided in the GSW-Matlab source code, version 3.06-11.
Unfortunately, this version 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
on 2021-0706, 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.
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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) d <- gsw_t_deriv_chem_potential_water_t_exact(SA, t, p) stopifnot(all.equal(d, c(-0.428798278908442, -0.423860344327343, -0.345277821010421, -0.164446485487145, -0.114228046736087, -0.076990819658255)))
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