gsw_pt0_from_t_ice {gsw}

Potential Temperature of Ice Referenced to the Surface

Description

Potential Temperature of Ice Referenced to the Surface

Usage

gsw_pt0_from_t_ice(t, p)

Arguments

t

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

p

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

Value

potential temperature [ 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_pt0_from_t_ice.html

Examples

t  <- c(-10.7856, -13.4329, -12.8103, -12.2600, -10.8863, -8.4036)
p <- c(       10,       50,      125,      250,      600,    1000)
pt0 <- gsw_pt0_from_t_ice(t, p)
stopifnot(all.equal(pt0, c(-10.787787898205298, -13.443730926050607, -12.837427056999708,
                           -12.314321615760905, -11.017040858094250, -8.622907355083088)))