gsw_z_from_p

height from pressure (48-term equation)

Contents

USAGE:

z = gsw_z_from_p(p,lat,{geo_strf_dyn_height})

DESCRIPTION:

Calculates height from sea pressure using the computationally-efficient
48-term expression for density in terms of SA, CT and p. (McDougall et
al., 2011).
Note. Height z is NEGATIVE in the ocean. ie. Depth is -z.
 Depth is not used in the GSW computer software library.
TEOS-10 
Click for a more detailed description of calculating
height from pressure.

INPUT:

p    =  sea pressure                                            [ dbar ]
        ( ie. absolute pressure - 10.1325 dbar )

OPTIONAL:
geo_strf_dyn_height = dynamic height                          [ m2/s^2 ]

lat  =  latitude in decimal degrees north                [ -90 ... +90 ]
lat may have dimensions 1x1 or Mx1 or 1xN or MxN, where p is MxN.

OUTPUT:

z  =  height                                                       [ m ]
Note. At sea level z = 0, and since z (HEIGHT) is defined to be
  positive upwards, it follows that while z is positive in the
  atmosphere, it is NEGATIVE in the ocean.

EXAMPLE:

z =  [   10;   50;  125;  250;  600; 1000;]
lat = 4;
z = gsw_z_from_p(p,lat)
z =
  1.0e+002 *
  -0.099445831334188
  -0.497180888338818
  -1.242726230109135
  -2.484700703230813
  -5.958254446096435
  -9.920921779551200

AUTHOR:

Trevor McDougall, Claire Roberts-Thomson & Paul Barker.
                                                   [ help@teos-10.org ]

VERSION NUMBER:

3.01 (26th May, 2011)

REFERENCES:

IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of
 seawater - 2010: Calculation and use of thermodynamic properties.
 Intergovernmental Oceanographic Commission, Manuals and Guides No. 56,
 UNESCO (English), 196 pp.  Available from the TEOS-10 web site.
McDougall T.J., P.M. Barker, R. Feistel and D.R. Jackett, 2011:  A 
 computationally efficient 48-term expression for the density of 
 seawater in terms of Conservative Temperature, and related properties
 of seawater.  To be submitted to Ocean Science Discussions. 
Moritz (2000) Goedetic reference system 1980. J. Geodesy, 74, 128-133.
This software is available from http://www.TEOS-10.org