gsw_specvol_first_derivatives_wrt_enthalpy {gsw} | R Documentation |
First Derivatives of Specific Volume wrt Enthalpy
gsw_specvol_first_derivatives_wrt_enthalpy(SA, CT, p)
SA |
Absolute Salinity [ g/kg ] |
CT |
Conservative Temperature [ degC ] |
p |
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar |
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.
A list containing v_SA_wrt_h
and v_h
.
http://www.teos-10.org/pubs/gsw/html/gsw_specvol_first_derivatives_wrt_enthalpy.html
Other things related to enthalpy: gsw_CT_from_enthalpy
,
gsw_dynamic_enthalpy
,
gsw_enthalpy_CT_exact
,
gsw_enthalpy_diff
,
gsw_enthalpy_first_derivatives_CT_exact
,
gsw_enthalpy_first_derivatives
,
gsw_enthalpy_ice
,
gsw_enthalpy_t_exact
,
gsw_enthalpy
,
gsw_frazil_properties_potential_poly
,
gsw_frazil_properties_potential
,
gsw_pot_enthalpy_from_pt_ice_poly
,
gsw_pot_enthalpy_from_pt_ice
,
gsw_pot_enthalpy_ice_freezing_poly
,
gsw_pot_enthalpy_ice_freezing
,
gsw_pt_from_pot_enthalpy_ice_poly
,
gsw_pt_from_pot_enthalpy_ice
,
gsw_specvol_first_derivatives
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_specvol_first_derivatives_wrt_enthalpy(SA, CT, p) expect_equal(r$v_SA_wrt_h/1e-6, c(-0.702143511679586, -0.701991101310494, -0.708834353735310, -0.730130919555592, -0.733018321892082, -0.733342002723321)) expect_equal(r$v_h/1e-10, c(0.795862623587769, 0.790648383268264, 0.687443468257647, 0.422105846942233, 0.355778874334799, 0.314053366403993))