gsw_Helmholtz_energy_ice: Helmholtz Energy of Ice

Description Usage Arguments Value Implementation Note References Examples

View source: R/gsw.R

Description

Helmholtz Energy of Ice

Usage

1

Arguments

t

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

p

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

Value

Helmholtz energy if ice [ J/kg ]

Implementation Note

This R function uses a wrapper to a C function contained within the GSW-C system as updated 2021-03-27 at https://github.com/TEOS-10/GSW-C with git commit 'f7bfebf44f686034636facb09852f1d5760c27f5'. In turn, that 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 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 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.

References

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

Examples

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t <- c(-10.7856, -13.4329, -12.8103, -12.2600,  -10.8863,  -8.4036)
p <- c(      10,       50,      125,      250,       600,     1000)
e <- gsw_Helmholtz_energy_ice(t, p)
stopifnot(all.equal(e/1e4, c(-1.362572315008330, -1.710375005915343, -1.628083272702224,
                             -1.555573047498573, -1.375469831393882, -1.053585607014677)))

gsw documentation built on July 8, 2021, 1:07 a.m.