Advances in measuring ocean salinity with an optical sensor
| Autor: | O Guillerme, Philippe Grosso, Christian Podeur, Patrice Brault, M. Le Menn, Laurent Delauney, J. L. de Bougrenet de la Tocnaye |
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| Přispěvatelé: | Service Hydrographique et Océanographique de la Marine (SHOM), Ministère de la Défense, Département Optique (OPT), Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT), Institut français de recherche pour l'exploitation de la mer (IFREMER), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), NKE instrumentation |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Salinity
Measure (physics) Refractive index Density 02 engineering and technology 01 natural sciences salinity 010309 optics Optics Refractometer 0103 physical sciences Seawater 14. Life underwater Instrumentation Engineering (miscellaneous) Remote sensing seawater density refractive index business.industry Applied Mathematics 021001 nanoscience & nanotechnology Salinity measurement Temperature and pressure refractometer [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic Environmental science Current (fluid) 0210 nano-technology business |
| Zdroj: | Measurement Science & Technology (0957-0233) (Iop Publishing Ltd), 2011-11, Vol. 22, N. 11, P. 1-8 Measurement Science and Technology Measurement Science and Technology, IOP Publishing, 2011, 22 (115202), ⟨10.1088/0957-0233/22/11/115202⟩ |
| ISSN: | 0957-0233 1361-6501 |
| DOI: | 10.1088/0957-0233/22/11/115202⟩ |
| Popis: | International audience; Absolute salinity measurement of seawater has become a key issue in thermodynamic models of the oceans. One of the most direct ways is to measure the seawater refractive index which is related to density and can therefore be related to the absolute salinity. Recent advances in high resolution position sensitive devices enable us to take advantage of small beam deviation measurements using refractometers. This paper assesses the advantages of such technology with respect to the current state-of-the-art technology. In particular, we present the resolution dependence on refractive index variations and derive the limits of such a solution for designing seawater sensors well suited for coastal and deep-sea applications. Particular attention has been paid to investigate the impact of environmental parameters, such as temperature and pressure, on an optical sensor, and ways to mitigate or compensate them have been suggested here. The sensor has been successfully tested in a pressure tank and in open oceans 2000 m deep. |
| Databáze: | OpenAIRE |
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