Data files structure:
1. Longitude
2. Latitude
3. Depth (meters)
4. anomaly relative to annual mean Depth (meters)
5. anomaly relative to annual mean Depth (meters)
6. Salinity (PSU)
7. anomaly relative to annual mean Salinity (PSU)
8. anomaly relative to annual mean Salinity (PSU)
9. Potential Temperature (degC)
10. anomaly relative to annual mean Potential Temperature (degC)
11. anomaly relative to annual mean Potential Temperature (degC)
12. NO DATA (kg/m4)
13. anomaly relative to annual mean NO DATA (kg/m4)
14. anomaly relative to annual mean NO DATA (kg/m4)
15. Montgomery Potential (dynamic meters)
16. anomaly relative to annual mean Montgomery Potential (dynamic meters)
17. anomaly relative to annual mean Montgomery Potential (dynamic meters)
18. Spiciness
19. anomaly relative to annual mean Spiciness
20. anomaly relative to annual mean Spiciness
21. Montgomery Potential-2 (dynamic meters)
22. anomaly relative to annual mean Montgomery Potential-2 (dynamic meters)
23. anomaly relative to annual mean Montgomery Potential-2 (dynamic meters)
Aviso altimetry(*) referred to MDT_CNES-CLS09(**) was used
to calculate Montgomery Potential.
Aviso altimetry(*) referred to Miximenko and Niiler (2005) MDOT
was used to calculate Montgomery Potential-2.
(*) The altimeter products were produced by Ssalto/Duacs
and distributed by Aviso, with support from Cnes
(http://www.aviso.oceanobs.com/duacs/).
(**) MDT_CNES-CLS09 was produced by CLS Space Oceanography Division
and distributed by Aviso, with support from Cnes
(http://www.aviso.oceanobs.com/).