gsw (version 1.0-5)

gsw_p_from_z: Pressure from height (75-term equation)

Description

Pressure from height (75-term equation)

Usage

gsw_p_from_z(z, latitude)

Arguments

z

height, zero at surface (but note last 2 args) and positive upwards [ m ]

latitude

latitude in decimal degrees, positive to the north of the equator. (This is called lat in the TEOS-10 Matlab code.)

Value

sea pressure [ dbar ]

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_p_from_z.html

See Also

Other things related to depth: gsw_z_from_p

Examples

# NOT RUN {
z <- -c(10, 50, 125, 250, 600, 1000)
latitude <- 4
p <- gsw_p_from_z(z, latitude)
expect_equal(p/1e3, c(0.010055726724518, 0.050283543374874, 0.125731858435610,
                    0.251540299593468, 0.604210012340727, 1.007990337692001))
# }