Simultaneous measurement of water temperature and salinity using Raman spectroscopy

Carolyn J. Taylor*, Ondrej Kitzler, Simon A. Curtis, Brad R. Neimann, Judith M. Dawes, James E. Downes, David J. Spence, Helen M. Pask

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We present a method to simultaneously determine water temperature and salinity, which uses a pulsed excitation laser and a three-channel Raman spectrometer. The method relies on the systematic dependence of the Raman OH stretching band on temperature and salinity, and is compatible with LiDAR techniques. We have measured the variation of the OH stretching band in two seawater samples and a NaCl solution, and constructed a linear mapping between signal ratios derived from the three spectral channels and the temperature and salinity of each sample. For the natural seawater this approach has been determined by cross-validation to have a predictive accuracy of ±1.6 PSU and ±0.5 °C.

Original languageEnglish
Article number525963
Pages (from-to)909-920
Number of pages12
JournalOptics Continuum
Volume3
Issue number6
DOIs
Publication statusPublished - 15 Jun 2024

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