# gsw_Nsquared_lowerlimit

    specified profile of minimum buoyancy frequency squared

## Contents

- USAGE:
- DESCRIPTION:
- INPUT:
- OUTPUT:
- EXAMPLE:
- AUTHOR:
- VERSION NUMBER:
- REFERENCES:

## USAGE:

    Nsquared_lowerlimit = gsw_Nsquared_lowerlimit(p,long,lat)

## DESCRIPTION:

    Calculates the minimum Nsquared such that a cast is stable.

## INPUT:

    p     =  sea pressure                                           [ dbar ]
             ( i.e. absolute pressure - 10.1325 dbar )
    long  =  longitude in decimal degrees                     [ 0 ... +360 ]
    lat   =  latitude in decimal degrees north               [ -90 ... +90 ]

    lat & long may have dimensions 1x1 or Mx1 or 1xN or MxN, where p is MxN.

## OUTPUT:

    Nsquared_lowerlimit  = Minimum Brunt-Vaisala Frequency squared   [ s-2 ]

## EXAMPLE:

    p   = [     10;      50;     125;     250;     600;    1000;]
    long = 180;
    lat = 4;

    N2_lowerlimit = gsw_Nsquared_lowerlimit(p,long,lat)

    N2_lowerlimit =

    1.0e-07 *

       0.992537375311876
       0.963422068375535
       0.911872676938447
       0.834100587303554
       0.661608727070520
       0.525909580878582

## AUTHOR:

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

## VERSION NUMBER:

    3.05.5 (16th June, 2016)

## REFERENCES:

    Barker, P.M., and T.J. McDougall, 2016: Stabilisation of hydrographic
    profiles.  J. Atmosph. Ocean. Tech., submitted.

    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.

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