gsw (version 1.0-5)

gsw_rho_first_derivatives_wrt_enthalpy: Density First Derivatives wrt enthalpy (75-term equation)

Description

Density First Derivatives wrt enthalpy (75-term equation)

Usage

gsw_rho_first_derivatives_wrt_enthalpy(SA, CT, p)

Arguments

SA

Absolute Salinity [ g/kg ]

CT

Conservative Temperature [ degC ]

p

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

Value

A list containing rho_SA_wrt_h [ (kg/m^3)/(g/kg)/(J/kg) ] and rho_h [ (kg/m^3)/(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_rho_first_derivatives_wrt_enthalpy.html

See Also

Other things related to density: gsw_CT_from_rho, gsw_CT_maxdensity, gsw_SA_from_rho, gsw_alpha_on_beta, gsw_alpha_wrt_t_exact, gsw_alpha_wrt_t_ice, gsw_alpha, gsw_beta_const_t_exact, gsw_beta, gsw_pot_rho_t_exact, gsw_rho_alpha_beta, gsw_rho_first_derivatives, gsw_rho_ice, gsw_rho_t_exact, gsw_rho, gsw_sigma0, gsw_sigma1, gsw_sigma2, gsw_sigma3, gsw_sigma4, gsw_specvol_alpha_beta, gsw_specvol_anom_standard, gsw_specvol_ice, gsw_specvol_t_exact, gsw_specvol

Examples

# NOT RUN {
SA <- c(34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324)
CT <- c(28.8099, 28.4392, 22.7862, 10.2262,  6.8272,  4.3236)
p <- c(      10,      50,     125,     250,     600,    1000)
r <- gsw_rho_first_derivatives_wrt_enthalpy(SA, CT, p)
expect_equal(r$rho_SA_wrt_h, c(0.733147960400929, 0.733595114830609, 0.743886977148835,
                              0.771275693831993, 0.777414200397148, 0.781030546357425))
expect_equal(r$rho_h*1e4, c(-0.831005413475887, -0.826243794873652, -0.721438289309903,
                          -0.445892608094272, -0.377326924646647, -0.334475962698187))
# }