gsw (version 1.0-5)

gsw_Helmholtz_energy_ice: Helmholtz Energy of Ice

Description

Helmholtz Energy of Ice

Usage

gsw_Helmholtz_energy_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

Helmholtz energy if ice [ J/kg ]

Details

The present R function works with a wrapper to a C function contained within the GSW-C system (Version 3.05-4 dated 2017-08-07, available at https://github.com/TEOS-10/GSW-C, as git commit '5b4d959e54031f9e972f3e863f63e67fa4f5bfec'), which stems from the GSW-Fortran system (https://github.com/TEOS-10/GSW-Fortran) which in turn stems from the GSW-Matlab system (https://github.com/TEOS-10/GSW-Matlab). Consult http://www.teos-10.org to learn more about these software systems, their authorships, and the science behind it all.

References

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

Examples

# NOT RUN {
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)
expect_equal(e/1e4, c(-1.362572315008330, -1.710375005915343, -1.628083272702224,
                    -1.555573047498573, -1.375469831393882, -1.053585607014677))
# }