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., 2013).
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:

p =  [   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:

3.02 (17th November, 2012)

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, 2013:  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 J. Atm. Ocean. Technol., xx, yyy-zzz.
Moritz (2000) Goedetic reference system 1980. J. Geodesy, 74, 128-133.
This software is available from http://www.TEOS-10.org