# gsw_grav

**Gravitational acceleration**

## Contents

## USAGE:

grav = gsw_grav(lat,{p})

## DESCRIPTION:

Calculates acceleration due to gravity as a function of latitude and as
a function of pressure in the ocean.

## INPUT:

lat = latitude in decimal degress north [ -90 ... +90 ]

OPTIONAL:
p = sea pressure [ dbar ]
(ie. absolute pressure - 10.1325 dbar)
(If pressure is not given then it is assumed that pressure = 0 dbar).

p (if provided) may have dimensions 1x1 or Mx1 or 1xN or MxN,
where lat is MxN.)

## OUTPUT:

grav = gravitational acceleration [ m/s^2 ]

## EXAMPLE:

lat = [ -90; -60; -30; 0;]
p = 0;

grav = gsw_grav(lat,p)

Note. If the pressure is zero then the following is also valid

grav = gsw_grav(lat)

grav =

9.832186205884799
9.819178859991149
9.793249257048750
9.780327000000000

## AUTHOR:

Trevor McDougall & Paul Barker [ help@teos-10.org ]

## VERSION NUMBER:

3.05 (16th February, 2015)

## 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.
See appendix D of this TEOS-10 Manual.

Moritz (2000) Goedetic reference system 1980. J. Geodesy,74,128-133.

Saunders, P.M., and N.P. Fofonoff (1976) Conversion of pressure to
depth in the ocean. Deep-Sea Res.,pp. 109 - 111.

The software is available from http://www.TEOS-10.org