Determine whether a point is inside the 'funnel' of acceptable values

This function determines whether a given hydrographic value lies what the TEOS-10 literature calls a "funnel" of values that lead to acceptably accurate computation of specific volume. For more details, consult the TEOS-10 literature, perhaps starting with the materials referred to in the webpage cited in the ‘References’ section.

Usage

gsw_infunnel(SA, CT, p)

Arguments

SA: Absolute Salinity [ g/kg ]. The valid range for most `gsw` functions is 0 to 42 g/kg.
CT: Conservative Temperature [ degC ].
p: sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar

Value

a logical value indicating whether the given point is inside the funnel of acceptable values.

References

https://www.teos-10.org/pubs/gsw/html/gsw_infunnel.html

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

Examples

library(gsw)
gsw_infunnel(35, 10, 100) # TRUE
#> [1] TRUE
gsw_infunnel(45, 10, 100) # FALSE: too salty
#> [1] FALSE
gsw_infunnel(35, -4, 100) # FALSE: below freezing
#> [1] FALSE