gsw (version 1.0-5)

gsw_t_deriv_chem_potential_water_t_exact: Derivative of Chemical Potential of Water in Seawater wrt Temperature

Description

Derivative of Chemical Potential of Water in Seawater wrt Temperature

Usage

gsw_t_deriv_chem_potential_water_t_exact(SA, t, p)

Arguments

SA

Absolute Salinity [ g/kg ]

t

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

p

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

Value

derivative [ J/(g*degC) ]

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_t_deriv_chem_potential_water_t_exact.html

Examples

# NOT RUN {
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)
expect_equal(d, c(-0.428798278908442, -0.423860344327343, -0.345277821010421,
                -0.164446485487145, -0.114228046736087, -0.076990819658255))
# }