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Computation of height (above sea level) from pressure, using the 75-term equation for specific volume.
gsw_z_from_p(p, latitude, geo_strf_dyn_height, sea_surface_geopotential)height [ m ]
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar
latitude in decimal degrees, positive to the north of the equator. (This
is called lat in the TEOS-10 Matlab code.)
vector of same length as p and latitude,
indicating dynamic height [ m^2/s^2 ].
If not supplied, this defaults to a vector of 0 values, with length matching that
of p.
vector of same length as p and latitude,
indicating geopotential at zero sea pressure [ m^2/s^2 ].
If not supplied, this defaults to a vector of 0 values, with length matching that
of p.
This R function uses a wrapper to a C function contained within the GSW-C system as updated 2022-10-11 at https://github.com/TEOS-10/GSW-C with git commit `657216dd4f5ea079b5f0e021a4163e2d26893371`.
The C function uses data from the library/gsw_data_v3_0.mat
file provided in the GSW-Matlab source code, version 3.06-11.
Unfortunately, this version of the mat file is no longer displayed on the
TEOS-10.org website. Therefore, in the interests of making GSW-R be
self-contained, a copy was downloaded from
http://www.teos-10.org/software/gsw_matlab_v3_06_11.zip on 2022-05-25,
the .mat file was stored in the developer/create_data directory of
https://github.com/TEOS-10/GSW-R, and then the dataset used in GSW-R
was created based on that .mat file.
Please consult http://www.teos-10.org to learn more about the various TEOS-10 software systems.
The geo_strf_dyn_height and sea_surface_geopotential
parameters were added in GSW-R version 1.0-6.
Other things related to depth:
gsw_p_from_z()
z <- gsw_z_from_p(c(10, 50, 125, 250, 600,1000), 4)
stopifnot(all.equal(z/1e2, c(-0.099445834469453, -0.497180897012550, -1.242726219409978,
-2.484700576548589, -5.958253480356214, -9.920919060719987)))
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