gsw_N2sol_SP_pt

`solubility of N2 in seawater`

USAGE:

`N2sol = gsw_N2sol_SP_pt(SP,pt)`

DESCRIPTION:

```Calculates the nitrogen, N2, concentration expected at equilibrium with
air at an Absolute Pressure of 101325 Pa (sea pressure of 0 dbar)
including saturated water vapor.  This function uses the solubility
coefficients as listed in Hamme and Emerson (2004).```
```Note that this algorithm has not been approved by IOC and is not work
from SCOR/IAPSO Working Group 127. It is included in the GSW
Oceanographic Toolbox as it seems to be oceanographic best practice.```

INPUT:

```SP  =  Practical Salinity  (PSS-78)                         [ unitless ]
pt  =  potential temperature                                   [ deg C ]
with reference sea pressure (pr) = 0 dbar.```
`SP & pt need to have the same dimensions.`

OUTPUT:

`N2sol = solubility of nitrogen                               [ umol/kg ]`

EXAMPLE:

```SP = [34.7118; 34.8915; 35.0256; 34.8472; 34.7366; 34.7324;]
pt = [28.8099; 28.4392; 22.7862; 10.2262;  6.8272;  4.3236;]```
`N2sol = gsw_N2sol_SP_pt(SP,pt)`
`N2sol = `
`   1.0e+002 *`
```   3.691117025637774
3.705575018006895
4.018436454952399
4.992639689279047
5.350383122250682
5.644762851263093```

AUTHOR:

`Roberta Hamme, Paul Barker and Trevor McDougall      [ 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.```
```Hamme, R., and S. Emerson, 2004: The solubility of neon, nitrogen and
argon in distilled water and seawater. Deep-Sea Research, 51, 1517-1528.```
`The software is available from http://www.TEOS-10.org`